Merge pull request #15250 from edsantiago/docs_dedup_phase2

Refactor common man page options, phase 2
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podman-container-clone.1.md
podman-create.1.md
podman-pod-clone.1.md
podman-pod-create.1.md
podman-pull.1.md
podman-run.1.md

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Common Man Page Options
=======================
This subdirectory contains option (flag) names and descriptions
common to multiple podman man pages. Each file is one option. The
filename does not necessarily need to be identical to the option
name: for instance, `hostname.container.md` and `hostname.pod.md`
exist because the **--hostname** option is sufficiently different
between `podman-{create,run}` and `podman-pod-{create,run}` to
warrant living separately.
How
===
The files here are included in `podman-*.md.in` files using the `@@option`
mechanism:
```
@@option foo ! will include options/foo.md
```
The tool that does this is `hack/markdown-preprocess`. It is a python
script because it needs to run on `readthedocs.io`. From a given `.md.in`
file, this script will create a `.md` file that can then be read by
`go-md2man`, `sphinx`, anything that groks markdown. This runs as
part of `make docs`.
Special Substitutions
=====================
Some options are almost identical except for 'pod' vs 'container'
differences. For those, use `<<text for pods|text for containers>>`.
Order is immaterial: the important thing is the presence of the
string "`pod`" in one half but not the other. The correct string
will be chosen based on the filename: if the file contains `-pod`,
such as `podman-pod-create`, the string with `pod` (case-insensitive)
in it will be chosen.
The string `<<subcommand>>` will be replaced with the podman subcommand
as determined from the filename, e.g., `create` for `podman-create.1.md.in`.
This allows the shared use of examples in the option file:
```
Example: podman <<subcommand>> --foo --bar
```

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#### **--blkio-weight-device**=*device:weight*
Block IO relative device weight.

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#### **--blkio-weight**=*weight*
Block IO relative weight. The _weight_ is a value between **10** and **1000**.

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#### **--cap-add**=*capability*
Add Linux capabilities.

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#### **--cap-drop**=*capability*
Drop Linux capabilities.

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#### **--destroy**
Remove the original <<container|pod>> that we are cloning once used to mimic the configuration.

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#### **--entrypoint**=*"command"* | *'["command", "arg1", ...]'*
Overwrite the default ENTRYPOINT of the image.
This option allows you to overwrite the default entrypoint of the image.
The ENTRYPOINT of an image is similar to a COMMAND
because it specifies what executable to run when the container starts, but it is
(purposely) more difficult to override. The ENTRYPOINT gives a container its
default nature or behavior, so that when you set an ENTRYPOINT you can run the
container as if it were that binary, complete with default options, and you can
pass in more options via the COMMAND. But, sometimes an operator may want to run
something else inside the container, so you can override the default ENTRYPOINT
at runtime by using a **--entrypoint** and a string to specify the new
ENTRYPOINT.
You need to specify multi option commands in the form of a json string.

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#### **--expose**=*port*
Expose a port, or a range of ports (e.g. **--expose=3300-3310**) to set up port redirection
on the host system.

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#### **--health-cmd**=*"command"* | *'["command", "arg1", ...]'*
Set or alter a healthcheck command for a container. The command is a command to be executed inside your
container that determines your container health. The command is required for other healthcheck options
to be applied. A value of **none** disables existing healthchecks.
Multiple options can be passed in the form of a JSON array; otherwise, the command will be interpreted
as an argument to **/bin/sh -c**.

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#### **--health-interval**=*interval*
Set an interval for the healthchecks. An _interval_ of **disable** results in no automatic timer setup. The default is **30s**.

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#### **--health-retries**=*retries*
The number of retries allowed before a healthcheck is considered to be unhealthy. The default value is **3**.

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#### **--health-start-period**=*period*
The initialization time needed for a container to bootstrap. The value can be expressed in time format like
**2m3s**. The default value is **0s**.

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#### **--health-timeout**=*timeout*
The maximum time allowed to complete the healthcheck before an interval is considered failed. Like start-period, the
value can be expressed in a time format such as **1m22s**. The default value is **30s**.

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#### **--hostname**, **-h**=*name*
Container host name
Sets the container host name that is available inside the container. Can only be used with a private UTS namespace `--uts=private` (default). If `--pod` is specified and the pod shares the UTS namespace (default) the pod's hostname will be used.

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#### **--hostname**=*name*
Set a hostname to the pod.

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#### **--infra-command**=*command*
The command that will be run to start the infra container. Default: "/pause".

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#### **--infra-conmon-pidfile**=*file*
Write the pid of the infra container's **conmon** process to a file. As **conmon** runs in a separate process than Podman, this is necessary when using systemd to manage Podman containers and pods.

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#### **--infra-name**=*name*
The name that will be used for the pod's infra container.

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#### **--label-file**=*file*
Read in a line-delimited file of labels.

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#### **--link-local-ip**=*ip*
Not implemented.

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#### **--log-driver**=*driver*
Logging driver for the container. Currently available options are **k8s-file**, **journald**, **none** and **passthrough**, with **json-file** aliased to **k8s-file** for scripting compatibility. (Default **journald**).
The podman info command below will display the default log-driver for the system.
```
$ podman info --format '{{ .Host.LogDriver }}'
journald
```
The **passthrough** driver passes down the standard streams (stdin, stdout, stderr) to the
container. It is not allowed with the remote Podman client, including Mac and Windows (excluding WSL2) machines, and on a tty, since it is
vulnerable to attacks via TIOCSTI.

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#### **--mac-address**=*address*
<<Container|Pod>> network interface MAC address (e.g. 92:d0:c6:0a:29:33)
This option can only be used if the <<container|pod>> is joined to only a single network - i.e., **--network=_network-name_** is used at most once -
and if the <<container|pod>> is not joining another container's network namespace via **--network=container:_id_**.
Remember that the MAC address in an Ethernet network must be unique.
The IPv6 link-local address will be based on the device's MAC address
according to RFC4862.
To specify multiple static MAC addresses per <<container|pod>>, set multiple networks using the **--network** option with a static MAC address specified for each using the `mac` mode for that option.

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#### **--memory-swappiness**=*number*
Tune a container's memory swappiness behavior. Accepts an integer between *0* and *100*.
This flag is not supported on cgroups V2 systems.

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#### **--network-alias**=*alias*
Add a network-scoped alias for the <<container|pod>>, setting the alias for all networks that the container joins. To set a
name only for a specific network, use the alias option as described under the **--network** option.
If the network has DNS enabled (`podman network inspect -f {{.DNSEnabled}} <name>`),
these aliases can be used for name resolution on the given network. This option can be specified multiple times.
NOTE: When using CNI a <<container|pod>> will only have access to aliases on the first network that it joins. This limitation does
not exist with netavark/aardvark-dns.

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#### **--oom-score-adj**=*num*
Tune the host's OOM preferences for containers (accepts values from **-1000** to **1000**).

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#### **--pid**=*pid*
Set the PID mode for the pod. The default is to create a private PID namespace for the pod. Requires the PID namespace to be shared via --share.
host: use the hosts PID namespace for the pod
ns: join the specified PID namespace
private: create a new namespace for the pod (default)

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#### **--pids-limit**=*limit*
Tune the container's pids limit. Set to **-1** to have unlimited pids for the container. The default is **4096** on systems that support "pids" cgroup controller.

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#### **--platform**=*OS/ARCH*
Specify the platform for selecting the image. (Conflicts with --arch and --os)
The `--platform` option can be used to override the current architecture and operating system.

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#### **--pull**=*policy*
Pull image policy. The default is **missing**.
- **always**: Always pull the image and throw an error if the pull fails.
- **missing**: Pull the image only if it could not be found in the local containers storage. Throw an error if no image could be found and the pull fails.
- **never**: Never pull the image but use the one from the local containers storage. Throw an error if no image could be found.
- **newer**: Pull if the image on the registry is newer than the one in the local containers storage. An image is considered to be newer when the digests are different. Comparing the time stamps is prone to errors. Pull errors are suppressed if a local image was found.

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#### **--read-only-tmpfs**
If container is running in **--read-only** mode, then mount a read-write tmpfs on _/run_, _/tmp_, and _/var/tmp_. The default is **true**.

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#### **--read-only**
Mount the container's root filesystem as read-only.
By default a container will have its root filesystem writable allowing processes
to write files anywhere. By specifying the **--read-only** flag, the container will have
its root filesystem mounted as read-only prohibiting any writes.

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#### **--replace**
If another <<container|pod>> with the same name already exists, replace and remove it. The default is **false**.

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#### **--requires**=*container*
Specify one or more requirements.
A requirement is a dependency container that will be started before this container.
Containers can be specified by name or ID, with multiple containers being separated by commas.

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#### **--secret**=*secret[,opt=opt ...]*
Give the container access to a secret. Can be specified multiple times.
A secret is a blob of sensitive data which a container needs at runtime but
should not be stored in the image or in source control, such as usernames and passwords,
TLS certificates and keys, SSH keys or other important generic strings or binary content (up to 500 kb in size).
When secrets are specified as type `mount`, the secrets are copied and mounted into the container when a container is created.
When secrets are specified as type `env`, the secret will be set as an environment variable within the container.
Secrets are written in the container at the time of container creation, and modifying the secret using `podman secret` commands
after the container is created will not affect the secret inside the container.
Secrets and its storage are managed using the `podman secret` command.
Secret Options
- `type=mount|env` : How the secret will be exposed to the container. Default mount.
- `target=target` : Target of secret. Defaults to secret name.
- `uid=0` : UID of secret. Defaults to 0. Mount secret type only.
- `gid=0` : GID of secret. Defaults to 0. Mount secret type only.
- `mode=0` : Mode of secret. Defaults to 0444. Mount secret type only.

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#### **--stop-signal**=*signal*
Signal to stop a container. Default is **SIGTERM**.

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#### **--stop-timeout**=*seconds*
Timeout to stop a container. Default is **10**.
Remote connections use local containers.conf for defaults

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#### **--tmpfs**=*fs*
Create a tmpfs mount.
Mount a temporary filesystem (**tmpfs**) mount into a container, for example:
```
$ podman <<subcommand>> -d --tmpfs /tmp:rw,size=787448k,mode=1777 my_image
```
This command mounts a **tmpfs** at _/tmp_ within the container. The supported mount
options are the same as the Linux default mount flags. If you do not specify
any options, the system uses the following options:
**rw,noexec,nosuid,nodev**.

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#### **--uidmap**=*container_uid:from_uid:amount*
Run the container in a new user namespace using the supplied UID mapping. This
option conflicts with the **--userns** and **--subuidname** options. This
option provides a way to map host UIDs to container UIDs. It can be passed
several times to map different ranges.
The _from_uid_ value is based upon the user running the command, either rootful or rootless users.
* rootful user: *container_uid*:*host_uid*:*amount*
* rootless user: *container_uid*:*intermediate_uid*:*amount*
When **podman <<subcommand>>** is called by a privileged user, the option **--uidmap**
works as a direct mapping between host UIDs and container UIDs.
host UID -> container UID
The _amount_ specifies the number of consecutive UIDs that will be mapped.
If for example _amount_ is **4** the mapping would look like:
| host UID | container UID |
| - | - |
| _from_uid_ | _container_uid_ |
| _from_uid_ + 1 | _container_uid_ + 1 |
| _from_uid_ + 2 | _container_uid_ + 2 |
| _from_uid_ + 3 | _container_uid_ + 3 |
When **podman <<subcommand>>** is called by an unprivileged user (i.e. running rootless),
the value _from_uid_ is interpreted as an "intermediate UID". In the rootless
case, host UIDs are not mapped directly to container UIDs. Instead the mapping
happens over two mapping steps:
host UID -> intermediate UID -> container UID
The **--uidmap** option only influences the second mapping step.
The first mapping step is derived by Podman from the contents of the file
_/etc/subuid_ and the UID of the user calling Podman.
First mapping step:
| host UID | intermediate UID |
| - | - |
| UID for the user starting Podman | 0 |
| 1st subordinate UID for the user starting Podman | 1 |
| 2nd subordinate UID for the user starting Podman | 2 |
| 3rd subordinate UID for the user starting Podman | 3 |
| nth subordinate UID for the user starting Podman | n |
To be able to use intermediate UIDs greater than zero, the user needs to have
subordinate UIDs configured in _/etc/subuid_. See **subuid**(5).
The second mapping step is configured with **--uidmap**.
If for example _amount_ is **5** the second mapping step would look like:
| intermediate UID | container UID |
| - | - |
| _from_uid_ | _container_uid_ |
| _from_uid_ + 1 | _container_uid_ + 1 |
| _from_uid_ + 2 | _container_uid_ + 2 |
| _from_uid_ + 3 | _container_uid_ + 3 |
| _from_uid_ + 4 | _container_uid_ + 4 |
When running as rootless, Podman will use all the ranges configured in the _/etc/subuid_ file.
The current user ID is mapped to UID=0 in the rootless user namespace.
Every additional range is added sequentially afterward:
| host |rootless user namespace | length |
| - | - | - |
| $UID | 0 | 1 |
| 1 | $FIRST_RANGE_ID | $FIRST_RANGE_LENGTH |
| 1+$FIRST_RANGE_LENGTH | $SECOND_RANGE_ID | $SECOND_RANGE_LENGTH|
Even if a user does not have any subordinate UIDs in _/etc/subuid_,
**--uidmap** could still be used to map the normal UID of the user to a
container UID by running `podman <<subcommand>> --uidmap $container_uid:0:1 --user $container_uid ...`.
Note: the **--uidmap** flag cannot be called in conjunction with the **--pod** flag as a uidmap cannot be set on the container level when in a pod.

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#### **--uidmap**=*container_uid:from_uid:amount*
Run all containers in the pod in a new user namespace using the supplied mapping. This
option conflicts with the **--userns** and **--subuidname** options. This
option provides a way to map host UIDs to container UIDs. It can be passed
several times to map different ranges.

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#### **--ulimit**=*option*
Ulimit options. You can use **host** to copy the current configuration from the host.

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#### **--unsetenv**=*env*
Unset default environment variables for the container. Default environment
variables include variables provided natively by Podman, environment variables
configured by the image, and environment variables from containers.conf.

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#### **--uts**=*mode*
Set the UTS namespace mode for the container. The following values are supported:
- **host**: use the host's UTS namespace inside the container.
- **private**: create a new namespace for the container (default).
- **ns:[path]**: run the container in the given existing UTS namespace.
- **container:[container]**: join the UTS namespace of the specified container.

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#### **--uts**=*mode*
Set the UTS namespace mode for the pod. The following values are supported:
- **host**: use the host's UTS namespace inside the pod.
- **private**: create a new namespace for the pod (default).
- **ns:[path]**: run the pod in the given existing UTS namespace.

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@ -11,13 +11,9 @@ podman\-container\-clone - Creates a copy of an existing container
## OPTIONS
#### **--blkio-weight**=*weight*
@@option blkio-weight
Block IO weight (relative weight) accepts a weight value between 10 and 1000.
#### **--blkio-weight-device**=*weight*
Block IO weight (relative device weight, format: `DEVICE_NAME:WEIGHT`).
@@option blkio-weight-device
#### **--cpu-period**=*limit*
@ -130,9 +126,7 @@ two memory nodes.
If none are specified, the original container's CPU memory nodes are used.
#### **--destroy**
Remove the original container that we are cloning once used to mimic the configuration.
@@option destroy
#### **--device-read-bps**=*path*
@ -179,11 +173,7 @@ The format of `LIMIT` is `<number>[<unit>]`. Unit can be `b` (bytes),
`k` (kibibytes), `m` (mebibytes), or `g` (gibibytes). If you don't specify a
unit, `b` is used. Set LIMIT to `-1` to enable unlimited swap.
#### **--memory-swappiness**=*number*
Tune a container's memory swappiness behavior. Accepts an integer between 0 and 100.
This flag is not supported on cgroups V2 systems.
@@option memory-swappiness
#### **--name**

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@ -99,21 +99,15 @@ Path of the authentication file. Default is ${XDG\_RUNTIME\_DIR}/containers/auth
Note: You can also override the default path of the authentication file by setting the REGISTRY\_AUTH\_FILE
environment variable. `export REGISTRY_AUTH_FILE=path`
#### **--blkio-weight**=*weight*
@@option blkio-weight
Block IO weight (relative weight) accepts a weight value between 10 and 1000.
#### **--blkio-weight-device**=*device:weight*
#### **--blkio-weight-device**=*weight*
Block IO relative device weight.
Block IO weight (relative device weight, format: `DEVICE_NAME:WEIGHT`).
@@option cap-add
#### **--cap-add**=*capability*
Add Linux capabilities
#### **--cap-drop**=*capability*
Drop Linux capabilities
@@option cap-drop
@@option cgroup-conf
@ -323,22 +317,7 @@ Set custom DNS options. Invalid if using **--dns-opt** and **--network** that is
Set custom DNS search domains. Invalid if using **--dns-search** and **--network** that is set to 'none' or `container:<name|id>`. (Use --dns-search=. if you don't wish to set the search domain)
#### **--entrypoint**=*"command"* | *'["command", "arg1", ...]'*
Overwrite the default ENTRYPOINT of the image
This option allows you to overwrite the default entrypoint of the image.
The ENTRYPOINT of an image is similar to a COMMAND
because it specifies what executable to run when the container starts, but it is
(purposely) more difficult to override. The ENTRYPOINT gives a container its
default nature or behavior, so that when you set an ENTRYPOINT you can run the
container as if it were that binary, complete with default options, and you can
pass in more options via the COMMAND. But, sometimes an operator may want to run
something else inside the container, so you can override the default ENTRYPOINT
at runtime by using a **--entrypoint** and a string to specify the new
ENTRYPOINT.
You need to specify multi option commands in the form of a json string.
@@option entrypoint
#### **--env**, **-e**=*env*
@ -354,10 +333,7 @@ Read in a line delimited file of environment variables. See **Environment** note
@@option env-host
#### **--expose**=*port*
Expose a port, or a range of ports (e.g. --expose=3300-3310) to set up port redirection
on the host system.
@@option expose
#### **--gidmap**=*container_gid:host_gid:amount*
@ -370,42 +346,21 @@ Note: the **--gidmap** flag cannot be called in conjunction with the **--pod** f
@@option group-add
#### **--health-cmd**=*"command"* | *'["command", "arg1", ...]'*
@@option health-cmd
Set or alter a healthcheck command for a container. The command is a command to be executed inside your
container that determines your container health. The command is required for other healthcheck options
to be applied. A value of `none` disables existing healthchecks.
@@option health-interval
Multiple options can be passed in the form of a JSON array; otherwise, the command will be interpreted
as an argument to `/bin/sh -c`.
@@option health-retries
#### **--health-interval**=*interval*
@@option health-start-period
Set an interval for the healthchecks (a value of `disable` results in no automatic timer setup) (default "30s")
#### **--health-retries**=*retries*
The number of retries allowed before a healthcheck is considered to be unhealthy. The default value is `3`.
#### **--health-start-period**=*period*
The initialization time needed for a container to bootstrap. The value can be expressed in time format like
`2m3s`. The default value is `0s`
#### **--health-timeout**=*timeout*
The maximum time allowed to complete the healthcheck before an interval is considered failed. Like start-period, the
value can be expressed in a time format such as `1m22s`. The default value is `30s`.
@@option health-timeout
#### **--help**
Print usage statement
#### **--hostname**, **-h**=*name*
Container host name
Sets the container host name that is available inside the container. Can only be used with a private UTS namespace `--uts=private` (default). If `--pod` is specified and the pod shares the UTS namespace (default) the pod's hostname will be used.
@@option hostname.container
@@option hostuser
@ -490,26 +445,11 @@ a private IPC namespace.
Add metadata to a container (e.g., --label com.example.key=value)
#### **--label-file**=*file*
@@option label-file
Read in a line delimited file of labels
@@option link-local-ip
#### **--link-local-ip**=*ip*
Not implemented
#### **--log-driver**=*driver*
Logging driver for the container. Currently available options are *k8s-file*, *journald*, *none* and *passthrough*, with *json-file* aliased to *k8s-file* for scripting compatibility.
The podman info command below will display the default log-driver for the system.
```
$ podman info --format '{{ .Host.LogDriver }}'
journald
```
The *passthrough* driver passes down the standard streams (stdin, stdout, stderr) to the
container. It is not allowed with the remote Podman client, including Mac and Windows (excluding WSL2) machines, and on a tty, since it is
vulnerable to attacks via TIOCSTI.
@@option log-driver
#### **--log-opt**=*name=value*
@ -528,17 +468,7 @@ It supports the same keys as **podman inspect --format**.
This option is currently supported only by the **journald** log driver.
#### **--mac-address**=*address*
Container network interface MAC address (e.g. 92:d0:c6:0a:29:33)
This option can only be used if the container is joined to only a single network - i.e., **--network=_network-name_** is used at most once -
and if the container is not joining another container's network namespace via **--network=container:_id_**.
Remember that the MAC address in an Ethernet network must be unique.
The IPv6 link-local address will be based on the device's MAC address
according to RFC4862.
To specify multiple static MAC addresses per container, set multiple networks using the **--network** option with a static MAC address specified for each using the `mac` mode for that option.
@@option mac-address
#### **--memory**, **-m**=*limit*
@ -571,11 +501,7 @@ The format of `LIMIT` is `<number>[<unit>]`. Unit can be `b` (bytes),
`k` (kibibytes), `m` (mebibytes), or `g` (gibibytes). If you don't specify a
unit, `b` is used. Set LIMIT to `-1` to enable unlimited swap.
#### **--memory-swappiness**=*number*
Tune a container's memory swappiness behavior. Accepts an integer between 0 and 100.
This flag is not supported on cgroups V2 systems.
@@option memory-swappiness
@@option mount
@ -626,14 +552,7 @@ Valid _mode_ values are:
Note: Rootlesskit changes the source IP address of incoming packets to an IP address in the container network namespace, usually `10.0.2.100`. If your application requires the real source IP address, e.g. web server logs, use the slirp4netns port handler. The rootlesskit port handler is also used for rootless containers when connected to user-defined networks.
- **port_handler=slirp4netns**: Use the slirp4netns port forwarding, it is slower than rootlesskit but preserves the correct source IP address. This port handler cannot be used for user-defined networks.
#### **--network-alias**=*alias*
Add a network-scoped alias for the container, setting the alias for all networks that the container joins. To set a
name only for a specific network, use the alias option as described under the **--network** option.
If the network has DNS enabled (`podman network inspect -f {{.DNSEnabled}} <name>`),
these aliases can be used for name resolution on the given network. This option can be specified multiple times.
NOTE: When using CNI a container will only have access to aliases on the first network that it joins. This limitation does
not exist with netavark/aardvark-dns.
@@option network-alias
@@option no-healthcheck
@ -646,9 +565,7 @@ This option conflicts with **--add-host**.
@@option oom-kill-disable
#### **--oom-score-adj**=*num*
Tune the host's OOM preferences for containers (accepts -1000 to 1000)
@@option oom-score-adj
#### **--os**=*OS*
Override the OS, defaults to hosts, of the image to be pulled. For example, `windows`.
@ -668,14 +585,9 @@ Default is to create a private PID namespace for the container
@@option pidfile
#### **--pids-limit**=*limit*
@@option pids-limit
Tune the container's pids limit. Set `-1` to have unlimited pids for the container. (default "4096" on systems that support PIDS cgroups).
#### **--platform**=*OS/ARCH*
Specify the platform for selecting the image. (Conflicts with --arch and --os)
The `--platform` option can be used to override the current architecture and operating system.
@@option platform
#### **--pod**=*name*
@ -742,40 +654,19 @@ port to a random port on the host within an *ephemeral port range* defined by
`/proc/sys/net/ipv4/ip_local_port_range`. To find the mapping between the host
ports and the exposed ports, use `podman port`.
#### **--pull**=*policy*
Pull image policy. The default is **missing**.
- **always**: Always pull the image and throw an error if the pull fails.
- **missing**: Pull the image only if it could not be found in the local containers storage. Throw an error if no image could be found and the pull fails.
- **never**: Never pull the image but use the one from the local containers storage. Throw an error if no image could be found.
- **newer**: Pull if the image on the registry is newer than the one in the local containers storage. An image is considered to be newer when the digests are different. Comparing the time stamps is prone to errors. Pull errors are suppressed if a local image was found.
@@option pull
#### **--quiet**, **-q**
Suppress output information when pulling images
#### **--read-only**
@@option read-only
Mount the container's root filesystem as read-only.
@@option read-only-tmpfs
By default a container will have its root filesystem writable allowing processes
to write files anywhere. By specifying the `--read-only` flag the container will have
its root filesystem mounted as read-only prohibiting any writes.
@@option replace
#### **--read-only-tmpfs**
If container is running in --read-only mode, then mount a read-write tmpfs on /run, /tmp, and /var/tmp. The default is *true*
#### **--replace**
If another container with the same name already exists, replace and remove it. The default is **false**.
#### **--requires**=*container*
Specify one or more requirements.
A requirement is a dependency container that will be started before this container.
Containers can be specified by name or ID, with multiple containers being separated by commas.
@@option requires
#### **--restart**=*policy*
@ -818,28 +709,7 @@ finishes executing, similar to a tmpfs mount point being unmounted.
@@option seccomp-policy
#### **--secret**=*secret[,opt=opt ...]*
Give the container access to a secret. Can be specified multiple times.
A secret is a blob of sensitive data which a container needs at runtime but
should not be stored in the image or in source control, such as usernames and passwords,
TLS certificates and keys, SSH keys or other important generic strings or binary content (up to 500 kb in size).
When secrets are specified as type `mount`, the secrets are copied and mounted into the container when a container is created.
When secrets are specified as type `env`, the secret will be set as an environment variable within the container.
Secrets are written in the container at the time of container creation, and modifying the secret using `podman secret` commands
after the container is created will not affect the secret inside the container.
Secrets and its storage are managed using the `podman secret` command.
Secret Options
- `type=mount|env` : How the secret will be exposed to the container. Default mount.
- `target=target` : Target of secret. Defaults to secret name.
- `uid=0` : UID of secret. Defaults to 0. Mount secret type only.
- `gid=0` : GID of secret. Defaults to 0. Mount secret type only.
- `mode=0` : Mode of secret. Defaults to 0444. Mount secret type only.
@@option secret
#### **--security-opt**=*option*
@ -880,14 +750,9 @@ Size of `/dev/shm` (format: `<number>[<unit>]`, where unit = b (bytes), k (kibib
If you omit the unit, the system uses bytes. If you omit the size entirely, the system uses `64m`.
When size is `0`, there is no limit on the amount of memory used for IPC by the container.
#### **--stop-signal**=*SIGTERM*
@@option stop-signal
Signal to stop a container. Default is SIGTERM.
#### **--stop-timeout**=*seconds*
Timeout (in seconds) to stop a container. Default is 10.
Remote connections use local containers.conf for defaults
@@option stop-timeout
#### **--subgidname**=*name*
@ -948,18 +813,7 @@ The `container_manage_cgroup` boolean must be enabled for this to be allowed on
Require HTTPS and verify certificates when contacting registries (default: true). If explicitly set to true, then TLS verification will be used. If set to false, then TLS verification will not be used. If not specified, TLS verification will be used unless the target registry is listed as an insecure registry in registries.conf.
#### **--tmpfs**=*fs*
Create a tmpfs mount
Mount a temporary filesystem (`tmpfs`) mount into a container, for example:
$ podman create -d --tmpfs /tmp:rw,size=787448k,mode=1777 my_image
This command mounts a `tmpfs` at `/tmp` within the container. The supported mount
options are the same as the Linux default `mount` flags. If you do not specify
any options, the systems uses the following options:
`rw,noexec,nosuid,nodev`.
@@option tmpfs
#### **--tty**, **-t**
@ -974,97 +828,13 @@ standard input.
@@option tz
#### **--uidmap**=*container_uid:from_uid:amount*
@@option uidmap.container
Run the container in a new user namespace using the supplied UID mapping. This
option conflicts with the **--userns** and **--subuidname** options. This
option provides a way to map host UIDs to container UIDs. It can be passed
several times to map different ranges.
The _from_uid_ value is based upon the user running the command, either rootful or rootless users.
* rootful user: *container_uid*:*host_uid*:*amount*
* rootless user: *container_uid*:*intermediate_uid*:*amount*
When **podman create** is called by a privileged user, the option **--uidmap**
works as a direct mapping between host UIDs and container UIDs.
host UID -> container UID
The _amount_ specifies the number of consecutive UIDs that will be mapped.
If for example _amount_ is **4** the mapping would look like:
| host UID | container UID |
| - | - |
| _from_uid_ | _container_uid_ |
| _from_uid_ + 1 | _container_uid_ + 1 |
| _from_uid_ + 2 | _container_uid_ + 2 |
| _from_uid_ + 3 | _container_uid_ + 3 |
When **podman create** is called by an unprivileged user (i.e. running rootless),
the value _from_uid_ is interpreted as an "intermediate UID". In the rootless
case, host UIDs are not mapped directly to container UIDs. Instead the mapping
happens over two mapping steps:
host UID -> intermediate UID -> container UID
The **--uidmap** option only influences the second mapping step.
The first mapping step is derived by Podman from the contents of the file
_/etc/subuid_ and the UID of the user calling Podman.
First mapping step:
| host UID | intermediate UID |
| - | - |
| UID for the user starting Podman | 0 |
| 1st subordinate UID for the user starting Podman | 1 |
| 2nd subordinate UID for the user starting Podman | 2 |
| 3rd subordinate UID for the user starting Podman | 3 |
| nth subordinate UID for the user starting Podman | n |
To be able to use intermediate UIDs greater than zero, the user needs to have
subordinate UIDs configured in _/etc/subuid_. See **subuid**(5).
The second mapping step is configured with **--uidmap**.
If for example _amount_ is **5** the second mapping step would look like:
| intermediate UID | container UID |
| - | - |
| _from_uid_ | _container_uid_ |
| _from_uid_ + 1 | _container_uid_ + 1 |
| _from_uid_ + 2 | _container_uid_ + 2 |
| _from_uid_ + 3 | _container_uid_ + 3 |
| _from_uid_ + 4 | _container_uid_ + 4 |
The current user ID is mapped to UID=0 in the rootless user namespace.
Every additional range is added sequentially afterward:
| host |rootless user namespace | length |
| - | - | - |
| $UID | 0 | 1 |
| 1 | $FIRST_RANGE_ID | $FIRST_RANGE_LENGTH |
| 1+$FIRST_RANGE_LENGTH | $SECOND_RANGE_ID | $SECOND_RANGE_LENGTH|
Even if a user does not have any subordinate UIDs in _/etc/subuid_,
**--uidmap** could still be used to map the normal UID of the user to a
container UID by running `podman create --uidmap $container_uid:0:1 --user $container_uid ...`.
Note: the **--uidmap** flag cannot be called in conjunction with the **--pod** flag as a uidmap cannot be set on the container level when in a pod.
#### **--ulimit**=*option*
Ulimit options
You can pass `host` to copy the current configuration from the host.
@@option ulimit
@@option umask
#### **--unsetenv**=*env*
Unset default environment variables for the container. Default environment
variables include variables provided natively by Podman, environment variables
configured by the image, and environment variables from containers.conf.
@@option unsetenv
@@option unsetenv-all
@ -1120,14 +890,7 @@ Podman allocates unique ranges of UIDs and GIDs from the `containers` subordinat
This option is incompatible with **--gidmap**, **--uidmap**, **--subuidname** and **--subgidname**.
#### **--uts**=*mode*
Set the UTS namespace mode for the container. The following values are supported:
- **host**: use the host's UTS namespace inside the container.
- **private**: create a new namespace for the container (default).
- **ns:[path]**: run the container in the given existing UTS namespace.
- **container:[container]**: join the UTS namespace of the specified container.
@@option uts.container
#### **--variant**=*VARIANT*
Use _VARIANT_ instead of the default architecture variant of the container image. Some images can use multiple variants of the arm architectures, such as arm/v5 and arm/v7.

View File

@ -11,13 +11,9 @@ podman\-pod\-clone - Creates a copy of an existing pod
## OPTIONS
#### **--blkio-weight**=*weight*
@@option blkio-weight
Block IO weight (relative weight) accepts a weight value between 10 and 1000.
#### **--blkio-weight-device**=*weight*
Block IO weight (relative device weight, format: `DEVICE_NAME:WEIGHT`).
@@option blkio-weight-device
#### **--cgroup-parent**=*path*
@ -77,9 +73,7 @@ If there are four memory nodes on the system (0-3), use `--cpuset-mems=0,1`
then processes in the container will only use memory from the first
two memory nodes.
#### **--destroy**
Remove the original pod that we are cloning once used to mimic the configuration.
@@option destroy
#### **--device**=*host-device[:container-device][:permissions]*
@ -114,29 +108,19 @@ GID map for the user namespace. Using this flag will run all containers in the p
Print usage statement.
#### **--hostname**=*name*
@@option hostname.pod
Set a hostname to the pod.
@@option infra-command
#### **--infra-command**=*command*
@@option infra-conmon-pidfile
The command that will be run to start the infra container. Default: "/pause".
#### **--infra-conmon-pidfile**=*file*
Write the pid of the infra container's **conmon** process to a file. As **conmon** runs in a separate process than Podman, this is necessary when using systemd to manage Podman containers and pods.
#### **--infra-name**=*name*
The name that will be used for the pod's infra container.
@@option infra-name
#### **--label**, **-l**=*label*
Add metadata to a pod (e.g., --label com.example.key=value).
#### **--label-file**=*label*
Read in a line delimited file of labels.
@@option label-file
#### **--memory**, **-m**=*limit*
@ -163,13 +147,7 @@ unit, `b` is used. Set LIMIT to `-1` to enable unlimited swap.
Set a custom name for the cloned pod. The default if not specified is of the syntax: **<ORIGINAL_NAME>-clone**
#### **--pid**=*pid*
Set the PID mode for the pod. The default is to create a private PID namespace for the pod. Requires the PID namespace to be shared via --share.
host: use the hosts PID namespace for the pod
ns: join the specified PID namespace
private: create a new namespace for the pod (default)
@@option pid.pod
#### **--security-opt**=*option*
@ -244,12 +222,7 @@ For the network namespace, only sysctls beginning with net.\* are allowed.
Note: if the network namespace is not shared within the pod, these sysctls are not allowed.
#### **--uidmap**=*container_uid:from_uid:amount*
Run all containers in the pod in a new user namespace using the supplied mapping. This
option conflicts with the **--userns** and **--subuidname** options. This
option provides a way to map host UIDs to container UIDs. It can be passed
several times to map different ranges.
@@option uidmap.pod
#### **--userns**=*mode*
@ -280,14 +253,7 @@ Valid _mode_ values are:
- *nomap*: creates a user namespace where the current rootless user's UID:GID are not mapped into the container. This option is ignored for containers created by the root user.
#### **--uts**=*mode*
Set the UTS namespace mode for the pod. The following values are supported:
- **host**: use the host's UTS namespace inside the pod.
- **private**: create a new namespace for the pod (default).
- **ns:[path]**: run the pod in the given existing UTS namespace.
@@option uts.pod
#### **--volume**, **-v**=*[[SOURCE-VOLUME|HOST-DIR:]CONTAINER-DIR[:OPTIONS]]*

View File

@ -36,13 +36,9 @@ Add a line to /etc/hosts. The format is hostname:ip. The **--add-host**
option can be set multiple times.
The /etc/hosts file is shared between all containers in the pod.
#### **--blkio-weight**=*weight*
@@option blkio-weight
Block IO weight (relative weight) accepts a weight value between 10 and 1000.
#### **--blkio-weight-device**=*weight*
Block IO weight (relative device weight, format: `DEVICE_NAME:WEIGHT`).
@@option blkio-weight-device
#### **--cgroup-parent**=*path*
@ -162,29 +158,21 @@ GID map for the user namespace. Using this flag will run the container with user
Print usage statement.
#### **--hostname**=*name*
Set a hostname to the pod
@@option hostname.pod
#### **--infra**
Create an infra container and associate it with the pod. An infra container is a lightweight container used to coordinate the shared kernel namespace of a pod. Default: true.
#### **--infra-command**=*command*
@@option infra-command
The command that will be run to start the infra container. Default: "/pause".
#### **--infra-conmon-pidfile**=*file*
Write the pid of the infra container's **conmon** process to a file. As **conmon** runs in a separate process than Podman, this is necessary when using systemd to manage Podman containers and pods.
@@option infra-conmon-pidfile
#### **--infra-image**=*image*
The custom image that will be used for the infra container. Unless specified, Podman builds a custom local image which does not require pulling down an image.
#### **--infra-name**=*name*
The name that will be used for the pod's infra container.
@@option infra-name
#### **--ip**=*ip*
@ -208,21 +196,9 @@ To specify multiple static IPv6 addresses per pod, set multiple networks using t
Add metadata to a pod (e.g., --label com.example.key=value).
#### **--label-file**=*label*
@@option label-file
Read in a line delimited file of labels.
#### **--mac-address**=*address*
Pod network interface MAC address (e.g. 92:d0:c6:0a:29:33)
This option can only be used if the pod is joined to only a single network - i.e., **--network=_network-name_** is used at most once -
and if the pod is not joining another container's network namespace via **--network=container:_id_**.
Remember that the MAC address in an Ethernet network must be unique.
The IPv6 link-local address will be based on the device's MAC address
according to RFC4862.
To specify multiple static MAC addresses per pod, set multiple networks using the **--network** option with a static MAC address specified for each using the `mac` mode for that option.
@@option mac-address
#### **--memory**, **-m**=*limit*
@ -282,14 +258,7 @@ Valid _mode_ values are:
Note: Rootlesskit changes the source IP address of incoming packets to an IP address in the container network namespace, usually `10.0.2.100`. If your application requires the real source IP address, e.g. web server logs, use the slirp4netns port handler. The rootlesskit port handler is also used for rootless containers when connected to user-defined networks.
- **port_handler=slirp4netns**: Use the slirp4netns port forwarding, it is slower than rootlesskit but preserves the correct source IP address. This port handler cannot be used for user-defined networks.
#### **--network-alias**=*alias*
Add a network-scoped alias for the pod, setting the alias for all networks that the container joins. To set a
name only for a specific network, use the alias option as described under the **--network** option.
If the network has DNS enabled (`podman network inspect -f {{.DNSEnabled}} <name>`),
these aliases can be used for name resolution on the given network. This option can be specified multiple times.
NOTE: When using CNI a pod will only have access to aliases on the first network that it joins. This limitation does
not exist with netavark/aardvark-dns.
@@option network-alias
#### **--no-hosts**
@ -298,13 +267,7 @@ By default, Podman will manage _/etc/hosts_, adding the container's own IP addre
**--no-hosts** disables this, and the image's _/etc/hosts_ will be preserved unmodified.
This option conflicts with **--add-host**.
#### **--pid**=*pid*
Set the PID mode for the pod. The default is to create a private PID namespace for the pod. Requires the PID namespace to be shared via --share.
host: use the hosts PID namespace for the pod
ns: join the specified PID namespace
private: create a new namespace for the pod (default)
@@option pid.pod
#### **--pod-id-file**=*path*
@ -335,9 +298,7 @@ but only by the pod itself.
**Note:** This cannot be modified once the pod is created.
#### **--replace**
If another pod with the same name already exists, replace and remove it. The default is **false**.
@@option replace
#### **--security-opt**=*option*
@ -418,12 +379,7 @@ For the network namespace, only sysctls beginning with net.\* are allowed.
Note: if the network namespace is not shared within the pod, these sysctls are not allowed.
#### **--uidmap**=*container_uid:from_uid:amount*
Run the container in a new user namespace using the supplied mapping. This
option conflicts with the **--userns** and **--subuidname** options. This
option provides a way to map host UIDs to container UIDs. It can be passed
several times to map different ranges.
@@option uidmap.pod
#### **--userns**=*mode*
@ -454,13 +410,7 @@ Valid _mode_ values are:
- *nomap*: creates a user namespace where the current rootless user's UID:GID are not mapped into the container. This option is not allowed for containers created by the root user.
#### **--uts**=*mode*
Set the UTS namespace mode for the pod. The following values are supported:
- **host**: use the host's UTS namespace inside the pod.
- **private**: create a new namespace for the pod (default).
- **ns:[path]**: run the pod in the given existing UTS namespace.
@@option uts.pod
#### **--volume**, **-v**=*[[SOURCE-VOLUME|HOST-DIR:]CONTAINER-DIR[:OPTIONS]]*

View File

@ -85,11 +85,7 @@ Print the usage statement.
Override the OS, defaults to hosts, of the image to be pulled. For example, `windows`.
#### **--platform**=*OS/ARCH*
Specify the platform for selecting the image. The `--platform` option can be used to override the current architecture and operating system.
*IMPORTANT: Conflicts with --arch and --os*
@@option platform
#### **--quiet**, **-q**

View File

@ -116,21 +116,13 @@ Path to the authentication file. Default is *${XDG_RUNTIME_DIR}/containers/auth.
Note: You can also override the default path of the authentication file by setting the **REGISTRY_AUTH_FILE**
environment variable.
#### **--blkio-weight**=*weight*
@@option blkio-weight
Block IO relative weight. The _weight_ is a value between **10** and **1000**.
@@option blkio-weight-device
#### **--blkio-weight-device**=*device:weight*
@@option cap-add
Block IO relative device weight.
#### **--cap-add**=*capability*
Add Linux capabilities.
#### **--cap-drop**=*capability*
Drop Linux capabilities.
@@option cap-drop
@@option cgroup-conf
@ -357,23 +349,7 @@ Set custom DNS options. Invalid if using **--dns-opt** with **--network** that i
Set custom DNS search domains. Invalid if using **--dns-search** and **--network** that is set to **none** or **container:**_id_.
Use **--dns-search=.** if you don't wish to set the search domain.
#### **--entrypoint**=*"command"* | *'["command", "arg1", ...]'*
Overwrite the default ENTRYPOINT of the image.
This option allows you to overwrite the default entrypoint of the image.
The ENTRYPOINT of an image is similar to a COMMAND
because it specifies what executable to run when the container starts, but it is
(purposely) more difficult to override. The ENTRYPOINT gives a container its
default nature or behavior, so that when you set an ENTRYPOINT you can run the
container as if it were that binary, complete with default options, and you can
pass in more options via the COMMAND. But, sometimes an operator may want to run
something else inside the container, so you can override the default ENTRYPOINT
at runtime by using a **--entrypoint** and a string to specify the new
ENTRYPOINT.
You need to specify multi option commands in the form of a json string.
@@option entrypoint
#### **--env**, **-e**=*env*
@ -389,10 +365,7 @@ Read in a line delimited file of environment variables. See **Environment** note
@@option env-host
#### **--expose**=*port*
Expose a port, or a range of ports (e.g. **--expose=3300-3310**) to set up port redirection
on the host system.
@@option expose
#### **--gidmap**=*container_gid:host_gid:amount*
@ -405,42 +378,21 @@ Note: the **--gidmap** flag cannot be called in conjunction with the **--pod** f
@@option group-add
#### **--health-cmd**=*"command"* | *'["command", "arg1", ...]'*
@@option health-cmd
Set or alter a healthcheck command for a container. The command is a command to be executed inside your
container that determines your container health. The command is required for other healthcheck options
to be applied. A value of **none** disables existing healthchecks.
@@option health-interval
Multiple options can be passed in the form of a JSON array; otherwise, the command will be interpreted
as an argument to **/bin/sh -c**.
@@option health-retries
#### **--health-interval**=*interval*
@@option health-start-period
Set an interval for the healthchecks. An _interval_ of **disable** results in no automatic timer setup. The default is **30s**.
#### **--health-retries**=*retries*
The number of retries allowed before a healthcheck is considered to be unhealthy. The default value is **3**.
#### **--health-start-period**=*period*
The initialization time needed for a container to bootstrap. The value can be expressed in time format like
**2m3s**. The default value is **0s**.
#### **--health-timeout**=*timeout*
The maximum time allowed to complete the healthcheck before an interval is considered failed. Like start-period, the
value can be expressed in a time format such as **1m22s**. The default value is **30s**.
@@option health-timeout
#### **--help**
Print usage statement
#### **--hostname**, **-h**=*name*
Container host name
Sets the container host name that is available inside the container. Can only be used with a private UTS namespace `--uts=private` (default). If `--pod` is specified and the pod shares the UTS namespace (default) the pod's hostname will be used.
@@option hostname.container
@@option hostuser
@ -504,27 +456,11 @@ a private IPC namespace.
Add metadata to a container.
#### **--label-file**=*file*
@@option label-file
Read in a line-delimited file of labels.
#### **--link-local-ip**=*ip*
Not implemented.
#### **--log-driver**=*driver*
Logging driver for the container. Currently available options are **k8s-file**, **journald**, **none** and **passthrough**, with **json-file** aliased to **k8s-file** for scripting compatibility. (Default **journald**)
The podman info command below will display the default log-driver for the system.
```
$ podman info --format '{{ .Host.LogDriver }}'
journald
```
The **passthrough** driver passes down the standard streams (stdin, stdout, stderr) to the
container. It is not allowed with the remote Podman client, including Mac and Windows (excluding WSL2) machines, and on a tty, since it is
vulnerable to attacks via TIOCSTI.
@@option link-local-ip
@@option log-driver
#### **--log-opt**=*name=value*
@ -543,17 +479,7 @@ Set custom logging configuration. The following *name*s are supported:
This option is currently supported only by the **journald** log driver.
#### **--mac-address**=*address*
Container network interface MAC address (e.g. 92:d0:c6:0a:29:33)
This option can only be used if the container is joined to only a single network - i.e., **--network=_network-name_** is used at most once -
and if the container is not joining another container's network namespace via **--network=container:_id_**.
Remember that the MAC address in an Ethernet network must be unique.
The IPv6 link-local address will be based on the device's MAC address
according to RFC4862.
To specify multiple static MAC addresses per container, set multiple networks using the **--network** option with a static MAC address specified for each using the `mac` mode for that option.
@@option mac-address
#### **--memory**, **-m**=*number[unit]*
@ -587,11 +513,7 @@ the value of **--memory**.
Set _number_ to **-1** to enable unlimited swap.
#### **--memory-swappiness**=*number*
Tune a container's memory swappiness behavior. Accepts an integer between *0* and *100*.
This flag is not supported on cgroups V2 systems.
@@option memory-swappiness
@@option mount
@ -643,14 +565,7 @@ Valid _mode_ values are:
Note: Rootlesskit changes the source IP address of incoming packets to an IP address in the container network namespace, usually `10.0.2.100`. If your application requires the real source IP address, e.g. web server logs, use the slirp4netns port handler. The rootlesskit port handler is also used for rootless containers when connected to user-defined networks.
- **port_handler=slirp4netns**: Use the slirp4netns port forwarding, it is slower than rootlesskit but preserves the correct source IP address. This port handler cannot be used for user-defined networks.
#### **--network-alias**=*alias*
Add a network-scoped alias for the container, setting the alias for all networks that the container joins. To set a
name only for a specific network, use the alias option as described under the **--network** option.
If the network has DNS enabled (`podman network inspect -f {{.DNSEnabled}} <name>`),
these aliases can be used for name resolution on the given network. This option can be specified multiple times.
NOTE: When using CNI a container will only have access to aliases on the first network that it joins. This limitation does
not exist with netavark/aardvark-dns.
@@option network-alias
@@option no-healthcheck
@ -663,9 +578,7 @@ This option conflicts with **--add-host**.
@@option oom-kill-disable
#### **--oom-score-adj**=*num*
Tune the host's OOM preferences for containers (accepts values from **-1000** to **1000**).
@@option oom-score-adj
#### **--os**=*OS*
Override the OS, defaults to hosts, of the image to be pulled. For example, `windows`.
@ -691,14 +604,9 @@ The default is to create a private PID namespace for the container.
@@option pidfile
#### **--pids-limit**=*limit*
@@option pids-limit
Tune the container's pids limit. Set to **-1** to have unlimited pids for the container. The default is **4096** on systems that support "pids" cgroup controller.
#### **--platform**=*OS/ARCH*
Specify the platform for selecting the image. (Conflicts with --arch and --os)
The `--platform` option can be used to override the current architecture and operating system.
@@option platform
#### **--pod**=*name*
@ -772,40 +680,19 @@ When using this option, Podman will bind any exposed port to a random port on th
within an ephemeral port range defined by */proc/sys/net/ipv4/ip_local_port_range*.
To find the mapping between the host ports and the exposed ports, use **podman port**.
#### **--pull**=*policy*
Pull image policy. The default is **missing**.
- **always**: Always pull the image and throw an error if the pull fails.
- **missing**: Pull the image only if it could not be found in the local containers storage. Throw an error if no image could be found and the pull fails.
- **never**: Never pull the image but use the one from the local containers storage. Throw an error if no image could be found.
- **newer**: Pull if the image on the registry is newer than the one in the local containers storage. An image is considered to be newer when the digests are different. Comparing the time stamps is prone to errors. Pull errors are suppressed if a local image was found.
@@option pull
#### **--quiet**, **-q**
Suppress output information when pulling images
#### **--read-only**
@@option read-only
Mount the container's root filesystem as read-only.
@@option read-only-tmpfs
By default a container will have its root filesystem writable allowing processes
to write files anywhere. By specifying the **--read-only** flag, the container will have
its root filesystem mounted as read-only prohibiting any writes.
@@option replace
#### **--read-only-tmpfs**
If container is running in **--read-only** mode, then mount a read-write tmpfs on _/run_, _/tmp_, and _/var/tmp_. The default is **true**.
#### **--replace**
If another container with the same name already exists, replace and remove it. The default is **false**.
#### **--requires**=*container*
Specify one or more requirements.
A requirement is a dependency container that will be started before this container.
Containers can be specified by name or ID, with multiple containers being separated by commas.
@@option requires
#### **--restart**=*policy*
@ -856,28 +743,7 @@ Note: On **SELinux** systems, the rootfs needs the correct label, which is by de
@@option seccomp-policy
#### **--secret**=*secret[,opt=opt ...]*
Give the container access to a secret. Can be specified multiple times.
A secret is a blob of sensitive data which a container needs at runtime but
should not be stored in the image or in source control, such as usernames and passwords,
TLS certificates and keys, SSH keys or other important generic strings or binary content (up to 500 kb in size).
When secrets are specified as type `mount`, the secrets are copied and mounted into the container when a container is created.
When secrets are specified as type `env`, the secret will be set as an environment variable within the container.
Secrets are written in the container at the time of container creation, and modifying the secret using `podman secret` commands
after the container is created will not affect the secret inside the container.
Secrets and its storage are managed using the `podman secret` command.
Secret Options
- `type=mount|env` : How the secret will be exposed to the container. Default mount.
- `target=target` : Target of secret. Defaults to secret name.
- `uid=0` : UID of secret. Defaults to 0. Mount secret type only.
- `gid=0` : GID of secret. Defaults to 0. Mount secret type only.
- `mode=0` : Mode of secret. Defaults to 0444. Mount secret type only.
@@option secret
#### **--security-opt**=*option*
@ -921,14 +787,9 @@ When _size_ is **0**, there is no limit on the amount of memory used for IPC by
Sets whether the signals sent to the **podman run** command are proxied to the container process. SIGCHLD, SIGSTOP, and SIGKILL are not proxied. The default is **true**.
#### **--stop-signal**=*signal*
@@option stop-signal
Signal to stop a container. Default is **SIGTERM**.
#### **--stop-timeout**=*seconds*
Timeout to stop a container. Default is **10**.
Remote connections use local containers.conf for defaults
@@option stop-timeout
#### **--subgidname**=*name*
@ -1002,20 +863,7 @@ setsebool -P container_manage_cgroup true
Require HTTPS and verify certificates when contacting registries (default: true). If explicitly set to true, then TLS verification will be used. If set to false, then TLS verification will not be used. If not specified, TLS verification will be used unless the target registry is listed as an insecure registry in registries.conf.
#### **--tmpfs**=*fs*
Create a tmpfs mount.
Mount a temporary filesystem (**tmpfs**) mount into a container, for example:
```
$ podman run -d --tmpfs /tmp:rw,size=787448k,mode=1777 my_image
```
This command mounts a **tmpfs** at _/tmp_ within the container. The supported mount
options are the same as the Linux default mount flags. If you do not specify
any options, the system uses the following options:
**rw,noexec,nosuid,nodev**.
@@option tmpfs
#### **--tty**, **-t**
@ -1033,97 +881,13 @@ echo "asdf" | podman run --rm -i someimage /bin/cat
@@option tz
#### **--uidmap**=*container_uid:from_uid:amount*
@@option uidmap.container
Run the container in a new user namespace using the supplied UID mapping. This
option conflicts with the **--userns** and **--subuidname** options. This
option provides a way to map host UIDs to container UIDs. It can be passed
several times to map different ranges.
The _from_uid_ value is based upon the user running the command, either rootful or rootless users.
* rootful user: *container_uid*:*host_uid*:*amount*
* rootless user: *container_uid*:*intermediate_uid*:*amount*
When **podman run** is called by a privileged user, the option **--uidmap**
works as a direct mapping between host UIDs and container UIDs.
host UID -> container UID
The _amount_ specifies the number of consecutive UIDs that will be mapped.
If for example _amount_ is **4** the mapping would look like:
| host UID | container UID |
| - | - |
| _from_uid_ | _container_uid_ |
| _from_uid_ + 1 | _container_uid_ + 1 |
| _from_uid_ + 2 | _container_uid_ + 2 |
| _from_uid_ + 3 | _container_uid_ + 3 |
When **podman run** is called by an unprivileged user (i.e. running rootless),
the value _from_uid_ is interpreted as an "intermediate UID". In the rootless
case, host UIDs are not mapped directly to container UIDs. Instead the mapping
happens over two mapping steps:
host UID -> intermediate UID -> container UID
The **--uidmap** option only influences the second mapping step.
The first mapping step is derived by Podman from the contents of the file
_/etc/subuid_ and the UID of the user calling Podman.
First mapping step:
| host UID | intermediate UID |
| - | - |
| UID for the user starting Podman | 0 |
| 1st subordinate UID for the user starting Podman | 1 |
| 2nd subordinate UID for the user starting Podman | 2 |
| 3rd subordinate UID for the user starting Podman | 3 |
| nth subordinate UID for the user starting Podman | n |
To be able to use intermediate UIDs greater than zero, the user needs to have
subordinate UIDs configured in _/etc/subuid_. See **subuid**(5).
The second mapping step is configured with **--uidmap**.
If for example _amount_ is **5** the second mapping step would look like:
| intermediate UID | container UID |
| - | - |
| _from_uid_ | _container_uid_ |
| _from_uid_ + 1 | _container_uid_ + 1 |
| _from_uid_ + 2 | _container_uid_ + 2 |
| _from_uid_ + 3 | _container_uid_ + 3 |
| _from_uid_ + 4 | _container_uid_ + 4 |
When running as rootless, Podman will use all the ranges configured in the _/etc/subuid_ file.
The current user ID is mapped to UID=0 in the rootless user namespace.
Every additional range is added sequentially afterward:
| host |rootless user namespace | length |
| - | - | - |
| $UID | 0 | 1 |
| 1 | $FIRST_RANGE_ID | $FIRST_RANGE_LENGTH |
| 1+$FIRST_RANGE_LENGTH | $SECOND_RANGE_ID | $SECOND_RANGE_LENGTH|
Even if a user does not have any subordinate UIDs in _/etc/subuid_,
**--uidmap** could still be used to map the normal UID of the user to a
container UID by running `podman run --uidmap $container_uid:0:1 --user $container_uid ...`.
Note: the **--uidmap** flag cannot be called in conjunction with the **--pod** flag as a uidmap cannot be set on the container level when in a pod.
#### **--ulimit**=*option*
Ulimit options. You can use **host** to copy the current configuration from the host.
@@option ulimit
@@option umask
#### **--unsetenv**=*env*
Unset default environment variables for the container. Default environment
variables include variables provided natively by Podman, environment variables
configured by the image, and environment variables from containers.conf.
@@option unsetenv
@@option unsetenv-all
@ -1179,14 +943,7 @@ The rootless option `--userns=keep-id` uses all the subuids and subgids of the u
**private**: create a new namespace for the container.
This option is incompatible with **--gidmap**, **--uidmap**, **--subuidname** and **--subgidname**.
#### **--uts**=*mode*
Set the UTS namespace mode for the container. The following values are supported:
- **host**: use the host's UTS namespace inside the container.
- **private**: create a new namespace for the container (default).
- **ns:[path]**: run the container in the given existing UTS namespace.
- **container:[container]**: join the UTS namespace of the specified container.
@@option uts.container
#### **--variant**=*VARIANT*
Use _VARIANT_ instead of the default architecture variant of the container image. Some images can use multiple variants of the arm architectures, such as arm/v5 and arm/v7.

View File

@ -5,6 +5,7 @@
import glob
import os
import re
import sys
def main():
@ -32,7 +33,7 @@ def process(infile):
pod_or_container = 'pod'
# Sometimes a man page includes the subcommand.
subcommand = removesuffix(removeprefix(infile,"podman-"),".1.md.in").replace("-", " ")
subcommand = podman_subcommand(infile)
# foo.md.in -> foo.md -- but always write to a tmpfile
outfile = os.path.splitext(infile)[0]
@ -55,8 +56,8 @@ def process(infile):
fh_out.write("\n[//]: # (BEGIN included file " + optionfile + ")\n")
with open(optionfile, 'r') as fh_optfile:
for opt_line in fh_optfile:
opt_line = opt_line.replace('<POD-OR-CONTAINER>', pod_or_container)
opt_line = opt_line.replace('<SUBCOMMAND>', subcommand)
opt_line = replace_type(opt_line, pod_or_container)
opt_line = opt_line.replace('<<subcommand>>', subcommand)
fh_out.write(opt_line)
fh_out.write("\n[//]: # (END included file " + optionfile + ")\n")
else:
@ -65,21 +66,46 @@ def process(infile):
os.chmod(outfile_tmp, 0o444)
os.rename(outfile_tmp, outfile)
# str.removeprefix() is python 3.9+, we need to support older versions on mac
def removeprefix(string: str, prefix: str) -> str:
if string.startswith(prefix):
return string[len(prefix):]
else:
return string[:]
# Given a file path of the form podman-foo-bar.1.md.in, return "foo bar"
def podman_subcommand(string: str) -> str:
if string.startswith("podman-"):
string = string[len("podman-"):]
if string.endswith(".1.md.in"):
string = string[:-len(".1.md.in")]
return string.replace("-", " ")
# str.removesuffix() is python 3.9+, we need to support older versions on mac
def removesuffix(string: str, suffix: str) -> str:
# suffix='' should not call self[:-0].
if suffix and string.endswith(suffix):
return string[:-len(suffix)]
else:
return string[:]
# Replace instances of '<<pod|container>>' with the desired one (based on
# 'type' which is 'pod' or 'container').
def replace_type(line: str, type: str) -> str:
# Internal helper function: determines the desired half of the <a|b> string
def replwith(matchobj):
lhs, rhs = matchobj[0].split('|')
# Strip off '<<' and '>>'
lhs = lhs[2:]
rhs = rhs[:len(rhs)-2]
# Check both sides for 'pod' followed by (non-"m" or end-of-string).
# The non-m prevents us from triggering on 'podman', which could
# conceivably be present in both sides. And we check for 'pod',
# not 'container', because it's possible to have something like
# <<container in pod|container>>.
if re.match('pod([^m]|$)', lhs, re.IGNORECASE):
if re.match('pod([^m]|$)', rhs, re.IGNORECASE):
raise Exception("'%s' matches 'pod' in both left and right sides" % matchobj[0])
# Only left-hand side has "pod"
if type == 'pod':
return lhs
else:
return rhs
else:
if not re.match('pod([^m]|$)', rhs, re.IGNORECASE):
raise Exception("'%s' does not match 'pod' in either side" % matchobj[0])
if type == 'pod':
return rhs
else:
return lhs
return re.sub('<<[^\|>]+\|[^\|>]+>>', replwith, line)
if __name__ == "__main__":
main()

132
hack/markdown-preprocess-review Executable file
View File

@ -0,0 +1,132 @@
#!/usr/bin/perl
(our $ME = $0) =~ s|^.*/||;
use v5.20;
our $DSM = 'docs/source/markdown';
my ($oldname, $newname);
my %oldname;
my %changed;
open my $git_diff, '-|', 'git', 'log', '-1', '-p'
or die "$ME: Cannot fork: $!\n";
while (my $line = <$git_diff>) {
chomp $line;
if ($line =~ m!^\-\-\-\s+a/$DSM/(podman-\S+\.md(\.in)?)!) {
$oldname = $1;
$newname = undef;
}
elsif ($line =~ m!^\+\+\+\s+b/$DSM/(podman-\S+\.md(\.in)?)!) {
$newname = $1;
$oldname{$newname} = $oldname;
}
elsif ($newname) {
if ($line =~ s/^-####\s+//) {
$line =~ /^\*\*--(\S+?)\*\*/
or die "$ME: in $newname: weird '$line'";
$changed{$newname}{$1}{name} = $1;
}
# Usually the same, but not for host.container and host.pod.md
elsif ($line =~ /^\+\@\@option\s+(\S+)/) {
my $optfile = $1;
if ($optfile =~ /^(.*)\.\S+$/) {
$changed{$newname}{$1}{name} = $optfile;
}
}
}
}
close $git_diff;
# Pass 2: read each oldfile, parse changed options
for my $f (sort keys %changed) {
my $oldfile = $oldname{$f};
open my $git_fh, '-|', 'git', 'show', "HEAD^:$DSM/$oldfile"
or die "$ME: Cannot fork: $!\n";
my $opt;
while (my $line = <$git_fh>) {
if ($line =~ /^####\s+\*\*--(\S+?)\*\*/) {
$opt = $1;
if ($changed{$f}{$opt}) {
$changed{$f}{$opt}{text} = $line;
}
else {
undef $opt;
}
}
elsif ($line =~ /^#/ || $line =~ /^\@\@option\s/) {
undef $opt;
}
elsif ($opt) {
$changed{$f}{$opt}{text} .= $line;
}
}
close $git_fh
or die "$ME: Error running git on $oldfile\n";
}
# Pass 3: write out files
my $tempdir = "/tmp/$ME.diffs";
system('rm', '-rf', $tempdir);
mkdir $tempdir, 0755;
for my $md_file (sort keys %changed) {
for my $opt (sort keys %{$changed{$md_file}}) {
my $d = "$tempdir/$changed{$md_file}{$opt}{name}";
mkdir $d, 0755;
my $outfile = "$d/$md_file";
open my $fh, '>', $outfile
or die "$ME: Cannot create $outfile: $!\n";
# strip all trailing newlines
(my $text = $changed{$md_file}{$opt}{text}) =~ s/\n+$/\n/s;
print { $fh } $text;
close $fh
or die "$ME: Error writing $outfile: $!\n";
my $new_text = "$DSM/options/$changed{$md_file}{$opt}{name}.md";
die "$ME: File does not exist: $new_text\n" if ! -e $new_text;
system('cp', $new_text, "$d/zzz-chosen.md");
}
}
# Now run diffuse
chdir $tempdir or die;
my @all_opts = glob("*");
for my $i (0..$#all_opts) {
my $opt = $all_opts[$i];
chdir "$tempdir/$opt"
or die "??? Internal error, cannot cd $tempdir/$opt: $!";
$| = 1; printf "--%s (%d/%d) ", $opt, $i+1, scalar(@all_opts);
my @all_files = glob("*");
if (all_files_identical(@all_files)) {
pop @all_files;
print "[identical between @all_files]\n";
next;
}
# Prompt
print "[Y/n/q] ";
my $ans = <STDIN>;
next if $ans =~ /^n/i;
exit 0 if $ans =~ /^q/i;
system("diffuse", "-w", glob("*")) == 0
or die "Diffuse failed\n";
}
sub all_files_identical {
my %sha;
for my $f (@_) {
my $result = qx{sha256sum $f};
$result =~ /^([0-9a-f]+)\s/
or die "Internal error: unexpected result from sha256sum $f: $result";
$sha{$1}++;
}
return (keys(%sha) == 1);
}

58
hack/markdown-preprocess.t Executable file
View File

@ -0,0 +1,58 @@
#!/usr/bin/env python3
"""
Tests for markdown-preprocess
"""
import unittest
# https://stackoverflow.com/questions/66665217/how-to-import-a-python-script-without-a-py-extension
from importlib.util import spec_from_loader, module_from_spec
from importlib.machinery import SourceFileLoader
spec = spec_from_loader("mp", SourceFileLoader("mp", "hack/markdown-preprocess"))
mp = module_from_spec(spec)
spec.loader.exec_module(mp)
class TestPodReplacer(unittest.TestCase):
def test_basic(self):
"""basic pod|container and vice-versa"""
s = '<<container|pod>>'
self.assertEqual(mp.replace_type(s, 'pod'), 'pod')
self.assertEqual(mp.replace_type(s, 'container'), 'container')
s = '<<container|pod>>'
self.assertEqual(mp.replace_type(s, 'pod'), 'pod')
self.assertEqual(mp.replace_type(s, 'container'), 'container')
def test_case_insensitive(self):
"""test case-insensitive replacement of Pod, Container"""
s = '<<Pod|Container>>'
self.assertEqual(mp.replace_type(s, 'pod'), 'Pod')
self.assertEqual(mp.replace_type(s, 'container'), 'Container')
s = '<<Container|Pod>>'
self.assertEqual(mp.replace_type(s, 'pod'), 'Pod')
self.assertEqual(mp.replace_type(s, 'container'), 'Container')
def test_dont_care_about_podman(self):
"""we ignore 'podman'"""
self.assertEqual(mp.replace_type('<<podman container|pod in podman>>', 'container'), 'podman container')
def test_exception_both(self):
"""test that 'pod' on both sides raises exception"""
with self.assertRaisesRegex(Exception, "in both left and right sides"):
mp.replace_type('<<pod 123|pod 321>>', 'pod')
def test_exception_neither(self):
"""test that 'pod' on neither side raises exception"""
with self.assertRaisesRegex(Exception, "in either side"):
mp.replace_type('<<container 123|container 321>>', 'pod')
class TestPodmanSubcommand(unittest.TestCase):
def test_basic(self):
"""podman subcommand basic test"""
self.assertEqual(mp.podman_subcommand("podman-foo.1.md.in"), "foo")
self.assertEqual(mp.podman_subcommand("podman-foo-bar.1.md.in"), "foo bar")
if __name__ == '__main__':
unittest.main()