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OpenStack: Format "getting started" docs 

This basically formats the getting started doc of OpenStack to adhere to
the markdownlint rules and also includes some minor tweaks, like
adapt the headings to make the TOC work again, remove trailing
spaces, and use more consistent punctuation for pointing out examples.
This commit is contained in:
ederst 2023-03-21 12:58:03 +01:00
parent b202130d8f
commit 9841bebcab
1 changed files with 15 additions and 15 deletions
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docs/getting_started/openstack.md
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@ -1,6 +1,5 @@
# Getting Started with kOps on OpenStack
OpenStack support on kOps is currently **beta**, which means that OpenStack support is in good shape and could be used for production. However, it is not as rigorously tested as the stable cloud providers and there are some features not supported. In particular, kOps tries to support a wide variety of OpenStack setups and not all of them are equally well tested.
## OpenStack requirements
@ -21,6 +20,7 @@ In addition, kOps can make use of the following services:
The OpenStack version should be Ocata or newer.
## Source your openstack RC
The Cloud Config used by the kubernetes API server and kubelet will be constructed from environment variables in the openstack RC file.
```bash
@ -29,7 +29,7 @@ source openstack.rc
We recommend using [Application Credentials](https://docs.openstack.org/keystone/queens/user/application_credentials.html) when authenticating to OpenStack.
**Note** The authentication used locally will be exported to your cluster and used by the kubernetes controller components. You must avoid using personal credentials used for other systems,
**Note** The authentication used locally will be exported to your cluster and used by the kubernetes controller components. You must avoid using personal credentials used for other systems,
## Environment Variables
@ -82,8 +82,8 @@ kops delete cluster my-cluster.k8s.local --yes
* `--os-dns-servers=8.8.8.8,8.8.4.4` You can define dns servers to be used in your cluster if your openstack setup does not have working dnssetup by default
* `--os-octavia-provider` You can define the Octavia Loadbalancer provider to use. To get the list of providers available in your environment, run `openstack loadbalancer provider list`. Default: octavia.
## Compute and volume zone names does not match
Some of the openstack users do not have compute zones named exactly the same than volume zones. Good example is that there are several compute zones for instance `zone-1`, `zone-2` and `zone-3`. Then there is only one volumezone which is usually called `nova`. By default this is problem in kOps, because kOps assumes that if you are deploying things to `zone-1` there should be compute and volume zone called `zone-1`.
However, you can still get kOps working in your openstack by doing following:
@ -96,7 +96,7 @@ kops create cluster \
...
```
After you have initialized the configuration you need to edit configuration
After you have initialized the configuration you need to edit configuration:
```bash
kops edit cluster my-cluster.k8s.local
@ -115,7 +115,7 @@ spec:
override-volume-az: nova
```
**Finally execute update cluster**
Finally execute update cluster:
```bash
kops update cluster my-cluster.k8s.local --state ${KOPS_STATE_STORE} --yes
@ -123,7 +123,8 @@ kops update cluster my-cluster.k8s.local --state ${KOPS_STATE_STORE} --yes
kOps should create instances to all three zones, but provision volumes from the same zone.
# Using external cloud controller manager
## Using external cloud controller manager
If you want use [External CCM](https://github.com/kubernetes/cloud-provider-openstack) in your installation, this section contains instructions what you should do to get it up and running.
Create cluster without `--yes` flag (or modify existing cluster):
@ -139,13 +140,13 @@ spec:
cloudControllerManager: {}
```
Finally
Finally:
```bash
kops update cluster --name <cluster> --yes
```
# Using OpenStack without lbaas
## Using OpenStack without lbaas
Some OpenStack installations does not include installation of lbaas component. To launch a cluster without a loadbalancer, run:
@ -156,13 +157,13 @@ kops create cluster \
--api-loadbalancer-type=""
```
In clusters without loadbalancer, the address of a single random master will be added to your kube config.
In clusters without loadbalancer, the address of a single random master will be added to your kube config.
# Using existing OpenStack network
## Using existing OpenStack network
You can have kOps reuse existing network components instead of provisioning one per cluster. As OpenStack support is still beta, we recommend you take extra care when deleting clusters and ensure that kOps do not try to remove any resources not belonging to the cluster.
## Let kOps provision new subnets within an existing network
### Let kOps provision new subnets within an existing network
Use an existing network by using `--network <network id>`.
@ -173,14 +174,13 @@ spec:
networkID: <network id>
```
## Use existing networks
### Use existing subnets
Instead of kOps creating new subnets for the cluster, you can reuse an existing subnet.
When you create a new cluster, you can specify subnets using the `--subnets` and `--utility-subnets` flags.
## Example
Example:
```bash
kops create cluster \
@ -206,7 +206,7 @@ kops create cluster \
--os-octavia=true --yes
```
# Using with self-signed certificates in OpenStack
## Using with self-signed certificates in OpenStack
kOps can be configured to use insecure mode towards OpenStack. However, this is not recommended as OpenStack cloudprovider in kubernetes does not support it.
If you use insecure flag in kOps it might be that the cluster does not work correctly.