Use `pkg/discovery` to provide nodes discovery between daemon instances.
The functionality is driven by two different command-line flags: the
experimental `--cluster-store` (previously `--kv-store`) and
`--cluster-advertise`. It can be used in two ways by interested
components:
1. Externally by calling the `/info` API and examining the cluster store
field. The `pkg/discovery` package can then be used to hit the same
endpoint and watch for appearing or disappearing nodes. That is the
method that will for example be used by Swarm.
2. Internally by using the `Daemon.discoveryWatcher` instance. That is
the method that will for example be used by libnetwork.
Signed-off-by: Arnaud Porterie <arnaud.porterie@docker.com>
Avoid creating a global context object that will be used while the daemon is running.
Not only this object won't ever be garbage collected, but it won't ever be used for anything else than creating other contexts in each request. I think it's a bad practive to have something like this sprawling aroud the code.
This change removes that global object and initializes a context in the cases we don't have already one, like shutting down the server.
This also removes a bunch of context arguments from functions that did nothing with it.
Signed-off-by: David Calavera <david.calavera@gmail.com>
This PR adds a "request ID" to each event generated, the 'docker events'
stream now looks like this:
```
2015-09-10T15:02:50.000000000-07:00 [reqid: c01e3534ddca] de7c5d4ca927253cf4e978ee9c4545161e406e9b5a14617efb52c658b249174a: (from ubuntu) create
```
Note the `[reqID: c01e3534ddca]` part, that's new.
Each HTTP request will generate its own unique ID. So, if you do a
`docker build` you'll see a series of events all with the same reqID.
This allow for log processing tools to determine which events are all related
to the same http request.
I didn't propigate the context to all possible funcs in the daemon,
I decided to just do the ones that needed it in order to get the reqID
into the events. I'd like to have people review this direction first, and
if we're ok with it then I'll make sure we're consistent about when
we pass around the context - IOW, make sure that all funcs at the same level
have a context passed in even if they don't call the log funcs - this will
ensure we're consistent w/o passing it around for all calls unnecessarily.
ping @icecrime @calavera @crosbymichael
Signed-off-by: Doug Davis <dug@us.ibm.com>
Once there have '\t' in the "CREATED BY" section, it will possibly
cause a messy output of docker history.
Signed-off-by: Hu Keping <hukeping@huawei.com>
It defines global middlewares for every request.
This makes the server slightly more composable.
Signed-off-by: David Calavera <david.calavera@gmail.com>
This comment was wrongly referring to the old job mechanism and it
wasn't clear what it was trying to document.
Signed-off-by: Antonio Murdaca <runcom@linux.com>
`docker rename foo ''` would result in:
```
usage: docker rename OLD_NAME NEW_NAME
```
which is the old engine's way of return errors - yes that's in the
daemon code. So I fixed that error msg to just be normal.
While doing that I noticed that using an empty string for the
source container name failed but didn't print any error message at all.
This is because we would generate a URL like: ../containers//rename/..
which would cause a 301 redirect to ../containers/rename/..
however the CLI code doesn't actually deal with 301's - it just ignores
them and returns back to the CLI code/caller.
Rather than changing the CLI to deal with 3xx error codes, which would
probably be a good thing to do in a follow-on PR, for this immediate
issue I just added a cli-side check for empty strings for both old and
new names. This way we catch it even before we hit the daemon.
API callers will get a 404, assuming they follow the 301, for the
case of the src being empty, and the new error msg when the destination
is empty - so we should be good now.
Add tests for both cases too.
Signed-off-by: Doug Davis <dug@us.ibm.com>
Fixes#11957Fixes#12319
Also removes check for Darwin when the stdin reader is closed as it
doesn't appear to block any more.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
When use `docker stats` to minitor a running container and then stop it,
there are some fields need to be reset to zero. Otherwise it will keep
displaying the data it received last time.
Signed-off-by: Hu Keping <hukeping@huawei.com>
- refactor to make it easier to split the api in the future
- addition to check the existing test case and make sure it contains
some expected output
Signed-off-by: Morgan Bauer <mbauer@us.ibm.com>
- The build-time variables are passed as environment-context for command(s)
run as part of the RUN primitve. These variables are not persisted in environment of
intermediate and final images when passed as context for RUN. The build environment
is prepended to the intermediate continer's command string for aiding cache lookups.
It also helps with build traceability. But this also makes the feature less secure from
point of view of passing build time secrets.
- The build-time variables also get used to expand the symbols used in certain
Dockerfile primitves like ADD, COPY, USER etc, without an explicit prior definiton using a
ENV primitive. These variables get persisted in the intermediate and final images
whenever they are expanded.
- The build-time variables are only expanded or passed to the RUN primtive if they
are defined in Dockerfile using the ARG primitive or belong to list of built-in variables.
HTTP_PROXY, HTTPS_PROXY, http_proxy, https_proxy, FTP_PROXY and NO_PROXY are built-in
variables that needn't be explicitly defined in Dockerfile to use this feature.
Signed-off-by: Madhav Puri <madhav.puri@gmail.com>
For now docker stats will sum the rxbytes, txbytes, etc. of all
the interfaces.
It is OK for the output of CLI `docker stats` but not good for
the API response, especially when the container is in sereval
subnets.
It's better to leave these origianl data to user.
Signed-off-by: Hu Keping <hukeping@huawei.com>
This is the first step in converting out static strings into well-defined
error types. This shows just a few examples of it to get a feel for how things
will look. Once we agree on the basic outline we can then work on converting
the rest of the code over.
Signed-off-by: Doug Davis <dug@us.ibm.com>
Notary is capable of acting in offline mode, making use of cache TUF data.
When ping is not successful, notary should still be attempted without error.
Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
If a logdriver doesn't register a callback function to validate log
options, it won't be usable. Fix the journald driver by adding a dummy
validator.
Teach the client and the daemon's "logs" logic that the server can also
supply "logs" data via the "journald" driver. Update documentation and
tests that depend on error messages.
Add support for reading log data from the systemd journal to the
journald log driver. The internal logic uses a goroutine to scan the
journal for matching entries after any specified cutoff time, formats
the messages from those entries as JSONLog messages, and stuffs the
results down a pipe whose reading end we hand back to the caller.
If we are missing any of the 'linux', 'cgo', or 'journald' build tags,
however, we don't implement a reader, so the 'logs' endpoint will still
return an error.
Make the necessary changes to the build setup to ensure that support for
reading container logs from the systemd journal is built.
Rename the Jmap member of the journald logdriver's struct to "vars" to
make it non-public, and to make it easier to tell that it's just there
to hold additional variable values that we want journald to record along
with log data that we're sending to it.
In the client, don't assume that we know which logdrivers the server
implements, and remove the check that looks at the server. It's
redundant because the server already knows, and the check also makes
using older clients with newer servers (which may have new logdrivers in
them) unnecessarily hard.
When we try to "logs" and have to report that the container's logdriver
doesn't support reading, send the error message through the
might-be-a-multiplexer so that clients which are expecting multiplexed
data will be able to properly display the error, instead of tripping
over the data and printing a less helpful "Unrecognized input header"
error.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com> (github: nalind)
Allow to set the signal to stop a container in `docker run`:
- Use `--stop-signal` with docker-run to set the default signal the container will use to exit.
Signed-off-by: David Calavera <david.calavera@gmail.com>
Arnaud Porterie
Jess Frazelle
Morgan Bauer
David Calavera
Doug Davis
Ma Shimiao
Brian Goff
Hu Keping
Phil Estes
Alexandre Beslic
Evan Hazlett
Tibor Vass
Zhang Kun
Antonio Murdaca
Sally O'Malley
Antonio Murdaca
Sebastiaan van Stijn
Shijiang Wei
Madhav Puri
Derek McGowan
Nalin Dahyabhai
Rozhnov Alexandr