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kubectl: Support scaling deployments

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This commit adds support for using kubectl scale to scale deployments. Makes use of the
deployments/scale endpoint instead of updating deployment.spec.replicas directly.
This commit is contained in:
Michail Kargakis
2015-11-13 13:44:03 +01:00
parent a7425bf070
commit 99fc35880b
11 changed files with 558 additions and 200 deletions
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23
docs/user-guide/kubectl/kubectl_scale.md
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@@ -33,12 +33,12 @@ Documentation for other releases can be found at
## kubectl scale
Set a new size for a Replication Controller.
Set a new size for a Replication Controller, Job, or Deployment.
### Synopsis
Set a new size for a Replication Controller.
Set a new size for a Replication Controller, Job, or Deployment.
Scale also allows users to specify one or more preconditions for the scale action.
If --current-replicas or --resource-version is specified, it is validated before the
@@ -53,23 +53,26 @@ kubectl scale [--resource-version=version] [--current-replicas=count] --replicas
```
# Scale replication controller named 'foo' to 3.
$ kubectl scale --replicas=3 replicationcontrollers foo
$ kubectl scale --replicas=3 rc/foo
# Scale a replication controller identified by type and name specified in "foo-controller.yaml" to 3.
$ kubectl scale --replicas=3 -f foo-controller.yaml
# Scale a resource identified by type and name specified in "foo.yaml" to 3.
$ kubectl scale --replicas=3 -f foo.yaml
# If the replication controller named foo's current size is 2, scale foo to 3.
$ kubectl scale --current-replicas=2 --replicas=3 replicationcontrollers foo
# If the deployment named mysql's current size is 2, scale mysql to 3.
$ kubectl scale --current-replicas=2 --replicas=3 deployment/mysql
# Scale multiple replication controllers.
$ kubectl scale --replicas=5 rc/foo rc/bar
$ kubectl scale --replicas=5 rc/foo rc/bar rc/baz
# Scale job named 'cron' to 3.
$ kubectl scale --replicas=3 job/cron
```
### Options
```
--current-replicas=-1: Precondition for current size. Requires that the current size of the replication controller match this value in order to scale.
-f, --filename=[]: Filename, directory, or URL to a file identifying the replication controller to set a new size
--current-replicas=-1: Precondition for current size. Requires that the current size of the resource match this value in order to scale.
-f, --filename=[]: Filename, directory, or URL to a file identifying the resource to set a new size
-o, --output="": Output mode. Use "-o name" for shorter output (resource/name).
--replicas=-1: The new desired number of replicas. Required.
--resource-version="": Precondition for resource version. Requires that the current resource version match this value in order to scale.