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Merge pull request #60174 from hyperbolic2346/mwilson/metrics-server

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Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Adding metrics server

**What this PR does / why we need it**:
Adds support for the metrics server in the kubernetes-master charm. This allows the use of a horizontal pod autoscaler.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #
https://github.com/juju-solutions/bundle-canonical-kubernetes/issues/484
**Special notes for your reviewer**:
Needs to go in after https://github.com/juju-solutions/cdk-addons/pull/28
**Release note**:

```release-note
kubernetes-master charm now supports metrics server for horizontal pod autoscaler.
```
This commit is contained in:
Kubernetes Submit Queue 2018-04-02 02:47:26 -07:00 committed by GitHub
commit 2550bab1e3
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2 changed files with 20 additions and 1 deletions
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5
cluster/juju/layers/kubernetes-master/config.yaml
View File

@ -86,3 +86,8 @@ options:
description: |
The storage backend for kube-apiserver persistence. Can be "etcd2", "etcd3", or
"auto". Auto mode will select etcd3 on new installations, or etcd2 on upgrades.
enable-metrics:
type: boolean
default: true
description: |
If true the metrics server for Kubernetes will be deployed onto the cluster.

16
cluster/juju/layers/kubernetes-master/reactive/kubernetes_master.py
View File

@ -640,12 +640,14 @@ def configure_cdk_addons():
remove_state('cdk-addons.configured')
dbEnabled = str(hookenv.config('enable-dashboard-addons')).lower()
dnsEnabled = str(hookenv.config('enable-kube-dns')).lower()
metricsEnabled = str(hookenv.config('enable-metrics')).lower()
args = [
'arch=' + arch(),
'dns-ip=' + get_deprecated_dns_ip(),
'dns-domain=' + hookenv.config('dns_domain'),
'enable-dashboard=' + dbEnabled,
'enable-kube-dns=' + dnsEnabled
'enable-kube-dns=' + dnsEnabled,
'enable-metrics=' + metricsEnabled
]
check_call(['snap', 'set', 'cdk-addons'] + args)
if not addons_ready():
@ -1183,6 +1185,18 @@ def configure_apiserver(etcd_connection_string, leader_etcd_version):
else:
api_opts['admission-control'] = ','.join(admission_control)
if get_version('kube-apiserver') > (1, 6) and \
hookenv.config('enable-metrics'):
api_opts['requestheader-client-ca-file'] = ca_cert_path
api_opts['requestheader-allowed-names'] = 'client'
api_opts['requestheader-extra-headers-prefix'] = 'X-Remote-Extra-'
api_opts['requestheader-group-headers'] = 'X-Remote-Group'
api_opts['requestheader-username-headers'] = 'X-Remote-User'
api_opts['proxy-client-cert-file'] = client_cert_path
api_opts['proxy-client-key-file'] = client_key_path
api_opts['enable-aggregator-routing'] = 'true'
api_opts['client-ca-file'] = ca_cert_path
configure_kubernetes_service('kube-apiserver', api_opts, 'api-extra-args')
restart_apiserver()