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Merge pull request #298 from stevehipwell/helm-chart

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Add Helm chart
This commit is contained in:
Kubernetes Prow Robot
2020-07-16 16:15:00 -07:00
committed by GitHub
parent 550f68306c 4507a90bb6
commit 36b1e1f061
13 changed files with 361 additions and 1 deletions
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30
.github/workflows/release.yaml vendored Normal file
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name: Release Charts
on:
push:
tags:
- chart-*
jobs:
release:
runs-on: ubuntu-latest
steps:
- name: Checkout
uses: actions/checkout@v2
- name: Configure Git
run: |
git config user.name "$GITHUB_ACTOR"
git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
- name: Fetch history
run: git fetch --prune --unshallow
- name: Add dependency chart repos
run: |
helm repo add stable https://kubernetes-charts.storage.googleapis.com/
- name: Run chart-releaser
uses: helm/chart-releaser-action@v1.0.0-rc.2
env:
CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

10
Makefile
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@@ -41,6 +41,8 @@ IMAGE_GCLOUD:=$(REGISTRY)/descheduler:$(VERSION)
# In the future binaries can be uploaded to
# GCS bucket gs://k8s-staging-descheduler.
HAS_HELM := $(shell which helm)
all: build
build:
@@ -62,7 +64,7 @@ push: push-container-to-gcloud
clean:
rm -rf _output
verify: verify-gofmt verify-vendor lint
verify: verify-gofmt verify-vendor lint lint-chart
verify-gofmt:
./hack/verify-gofmt.sh
@@ -86,3 +88,9 @@ ifndef HAS_GOLANGCI
curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b ./_output/bin ${GOLANGCI_VERSION}
endif
./_output/bin/golangci-lint run
lint-chart:
ifndef HAS_HELM
curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 && chmod 700 ./get_helm.sh && ./get_helm.sh
endif
helm lint ./charts/descheduler

22
charts/descheduler/.helmignore Normal file
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# Patterns to ignore when building packages.
# This supports shell glob matching, relative path matching, and
# negation (prefixed with !). Only one pattern per line.
.DS_Store
# Common VCS dirs
.git/
.gitignore
.bzr/
.bzrignore
.hg/
.hgignore
.svn/
# Common backup files
*.swp
*.bak
*.tmp
*~
# Various IDEs
.project
.idea/
*.tmproj
.vscode/

16
charts/descheduler/Chart.yaml Normal file
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apiVersion: v1
name: descheduler
version: 1.0.0
appVersion: 0.18.0
description: Descheduler for Kubernetes is used to rebalance clusters by evicting pods that can potentially be scheduled on better nodes. In the current implementation, descheduler does not schedule replacement of evicted pods but relies on the default scheduler for that.
keywords:
- kubernetes
- descheduler
- kube-scheduler
home: https://github.com/kubernetes-sigs/descheduler
icon: https://kubernetes.io/images/favicon.png
sources:
- https://github.com/kubernetes-sigs/descheduler
maintainers:
- name: stevehipwell
email: steve.hipwell@github.com

59
charts/descheduler/README.md Normal file
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# Descheduler for Kubernetes
[Descheduler](https://github.com/kubernetes-sigs/descheduler/) for Kubernetes is used to rebalance clusters by evicting pods that can potentially be scheduled on better nodes. In the current implementation, descheduler does not schedule replacement of evicted pods but relies on the default scheduler for that.
## TL;DR:
```shell
helm repo add descheduler https://kubernetes-sigs.github.io/descheduler/
$ helm install descheduler/descheduler --name my-release
```
## Introduction
This chart bootstraps a [desheduler](https://github.com/kubernetes-sigs/descheduler/) cron job on a [Kubernetes](http://kubernetes.io) cluster using the [Helm](https://helm.sh) package manager.
## Prerequisites
- Kubernetes 1.14+
## Installing the Chart
To install the chart with the release name `my-release`:
```shell
helm install --name my-release descheduler/descheduler
```
The command deploys _descheduler_ on the Kubernetes cluster in the default configuration. The [configuration](#configuration) section lists the parameters that can be configured during installation.
> **Tip**: List all releases using `helm list`
## Uninstalling the Chart
To uninstall/delete the `my-release` deployment:
```shell
helm delete my-release
```
The command removes all the Kubernetes components associated with the chart and deletes the release.
## Configuration
The following table lists the configurable parameters of the _descheduler_ chart and their default values.
| Parameter | Description | Default |
| ------------------------------ | --------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------ |
| `image.repository` | Docker repository to use | `us.gcr.io/k8s-artifacts-prod/descheduler/descheduler` |
| `image.tag` | Docker tag to use | `v[chart appVersion]` |
| `image.pullPolicy` | Docker image pull policy | `IfNotPresent` |
| `nameOverride` | String to partially override `descheduler.fullname` template (will prepend the release name) | `""` |
| `fullnameOverride` | String to fully override `descheduler.fullname` template | `""` |
| `schedule` | The cron schedule to run the _descheduler_ job on | `"*/2 * * * *"` |
| `cmdOptions` | The options to pass to the _descheduler_ command | _see values.yaml_ |
| `deschedulerPolicy.strategies` | The _descheduler_ strategies to apply | _see values.yaml_ |
| `priorityClassName` | The name of the priority class to add to pods | `system-cluster-critical` |
| `rbac.create` | If `true`, create & use RBAC resources | `true` |
| `serviceAccount.create` | If `true`, create a service account for the cron job | `true` |
| `serviceAccount.name` | The name of the service account to use, if not set and create is true a name is generated using the fullname template | `nil` |

1
charts/descheduler/templates/NOTES.txt Normal file
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Descheduler installed as a cron job.

56
charts/descheduler/templates/_helpers.tpl Normal file
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{{/* vim: set filetype=mustache: */}}
{{/*
Expand the name of the chart.
*/}}
{{- define "descheduler.name" -}}
{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
{{- end -}}
{{/*
Create a default fully qualified app name.
We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
If release name contains chart name it will be used as a full name.
*/}}
{{- define "descheduler.fullname" -}}
{{- if .Values.fullnameOverride -}}
{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
{{- else -}}
{{- $name := default .Chart.Name .Values.nameOverride -}}
{{- if contains $name .Release.Name -}}
{{- .Release.Name | trunc 63 | trimSuffix "-" -}}
{{- else -}}
{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
{{- end -}}
{{- end -}}
{{- end -}}
{{/*
Create chart name and version as used by the chart label.
*/}}
{{- define "descheduler.chart" -}}
{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
{{- end -}}
{{/*
Common labels
*/}}
{{- define "descheduler.labels" -}}
app.kubernetes.io/name: {{ include "descheduler.name" . }}
helm.sh/chart: {{ include "descheduler.chart" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
{{- if .Chart.AppVersion }}
app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
{{- end }}
app.kubernetes.io/managed-by: {{ .Release.Service }}
{{- end -}}
{{/*
Create the name of the service account to use
*/}}
{{- define "descheduler.serviceAccountName" -}}
{{- if .Values.serviceAccount.create -}}
{{ default (include "descheduler.fullname" .) .Values.serviceAccount.name }}
{{- else -}}
{{ default "default" .Values.serviceAccount.name }}
{{- end -}}
{{- end -}}

21
charts/descheduler/templates/clusterrole.yaml Normal file
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{{- if .Values.rbac.create -}}
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: {{ template "descheduler.fullname" . }}
labels:
{{- include "descheduler.labels" . | nindent 4 }}
rules:
- apiGroups: [""]
resources: ["events"]
verbs: ["create", "update"]
- apiGroups: [""]
resources: ["nodes"]
verbs: ["get", "watch", "list"]
- apiGroups: [""]
resources: ["pods"]
verbs: ["get", "watch", "list", "delete"]
- apiGroups: [""]
resources: ["pods/eviction"]
verbs: ["create"]
{{- end -}}

16
charts/descheduler/templates/clusterrolebinding.yaml Normal file
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{{- if .Values.rbac.create -}}
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: {{ template "descheduler.fullname" . }}
labels:
{{- include "descheduler.labels" . | nindent 4 }}
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: {{ template "descheduler.fullname" . }}
subjects:
- kind: ServiceAccount
name: {{ template "descheduler.serviceAccountName" . }}
namespace: {{ .Release.Namespace }}
{{- end -}}

11
charts/descheduler/templates/configmap.yaml Normal file
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@@ -0,0 +1,11 @@
apiVersion: v1
kind: ConfigMap
metadata:
name: {{ template "descheduler.fullname" . }}
labels:
{{- include "descheduler.labels" . | nindent 4 }}
data:
policy.yaml: |
apiVersion: "descheduler/v1alpha1"
kind: "DeschedulerPolicy"
{{ toYaml .Values.deschedulerPolicy | trim | indent 4 }}

53
charts/descheduler/templates/cronjob.yaml Normal file
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apiVersion: batch/v1beta1
kind: CronJob
metadata:
name: {{ template "descheduler.fullname" . }}
labels:
{{- include "descheduler.labels" . | nindent 4 }}
spec:
schedule: {{ .Values.schedule | quote }}
concurrencyPolicy: "Forbid"
jobTemplate:
spec:
template:
metadata:
name: {{ template "descheduler.fullname" . }}
annotations:
checksum/config: {{ include (print $.Template.BasePath "/configmap.yaml") . | sha256sum }}
{{- if .Values.podAnnotations }}
{{- .Values.podAnnotations | toYaml | nindent 12 }}
{{- end }}
labels:
app.kubernetes.io/name: {{ include "descheduler.name" . }}
app.kubernetes.io/instance: {{ .Release.Name }}
{{- if .Values.podLabels }}
{{- .Values.podLabels | toYaml | nindent 12 }}
{{- end }}
spec:
{{- if .Values.priorityClassName }}
priorityClassName: {{ .Values.priorityClassName }}
{{- end }}
serviceAccountName: {{ template "descheduler.serviceAccountName" . }}
restartPolicy: "Never"
containers:
- name: {{ .Chart.Name }}
image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default (printf "v%s" .Chart.AppVersion) }}"
imagePullPolicy: {{ .Values.image.pullPolicy }}
command:
- "/bin/descheduler"
args:
- "--policy-config-file"
- "/policy-dir/policy.yaml"
{{- range $key, $value := .Values.cmdOptions }}
- {{ printf "--%s" $key | quote }}
{{- if $value }}
- {{ $value | quote }}
{{- end }}
{{- end }}
volumeMounts:
- mountPath: /policy-dir
name: policy-volume
volumes:
- name: policy-volume
configMap:
name: {{ template "descheduler.fullname" . }}

8
charts/descheduler/templates/serviceaccount.yaml Normal file
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{{- if .Values.serviceAccount.create -}}
apiVersion: v1
kind: ServiceAccount
metadata:
name: {{ template "descheduler.serviceAccountName" . }}
labels:
{{- include "descheduler.labels" . | nindent 4 }}
{{- end -}}

59
charts/descheduler/values.yaml Normal file
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# Default values for descheduler.
# This is a YAML-formatted file.
# Declare variables to be passed into your templates.
image:
repository: us.gcr.io/k8s-artifacts-prod/descheduler/descheduler
# Overrides the image tag whose default is the chart version
tag: ""
pullPolicy: IfNotPresent
nameOverride: ""
fullnameOverride: ""
schedule: "*/2 * * * *"
cmdOptions:
v: 3
# evict-local-storage-pods:
# max-pods-to-evict-per-node: 10
# node-selector: "key1=value1,key2=value2"
deschedulerPolicy:
strategies:
RemoveDuplicates:
enabled: true
RemovePodsViolatingNodeTaints:
enabled: true
RemovePodsViolatingNodeAffinity:
enabled: true
params:
nodeAffinityType:
- requiredDuringSchedulingIgnoredDuringExecution
RemovePodsViolatingInterPodAntiAffinity:
enabled: true
LowNodeUtilization:
enabled: true
params:
nodeResourceUtilizationThresholds:
thresholds:
cpu: 20
memory: 20
pods: 20
targetThresholds:
cpu: 50
memory: 50
pods: 50
priorityClassName: system-cluster-critical
rbac:
# Specifies whether RBAC resources should be created
create: true
serviceAccount:
# Specifies whether a ServiceAccount should be created
create: true
# The name of the ServiceAccount to use.
# If not set and create is true, a name is generated using the fullname template
name: