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[stable/chaoskube] Refactor Chaoskube (#6579)

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* [stable/chaoskube] Refactor Chaoskube to enable affinities, tolerations, and flexible resource selection

Signed-off-by: Alejandro Vicente Grabovetsky <sasha@aid.technology>

* Fix NOTES.txt to provide method to get first pod if replication > 1

Signed-off-by: Alejandro Vicente Grabovetsky <sasha@aid.technology>

* Update to latest Docker image for chaoskube

Signed-off-by: Alejandro Vicente Grabovetsky <sasha@aid.technology>

* Add debug mode for logging

Signed-off-by: Alejandro Vicente Grabovetsky <sasha@aid.technology>

* Small edits in NOTES.txt

Signed-off-by: Alejandro Vicente Grabovetsky <sasha@aid.technology>
This commit is contained in:
Sasha (Alejandro Vicente Grabovetsky)
2018-08-07 05:22:42 -07:00
committed by k8s-ci-robot
parent 9ee4987a21
commit 61c032df1c
12 changed files with 170 additions and 92 deletions
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stable/chaoskube/.helmignore
+21
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@@ -0,0 +1,21 @@
# 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
stable/chaoskube/Chart.yaml
+4 -3
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@@ -1,10 +1,11 @@
apiVersion: v1
name: chaoskube
version: 0.8.0
appVersion: 0.8.0
version: 0.8.1
appVersion: 0.9.0
description: Chaoskube periodically kills random pods in your Kubernetes cluster.
home: https://github.com/linki/chaoskube
sources:
- https://github.com/linki/chaoskube
- https://github.com/linki/chaoskube
maintainers:
- name: linki
email: linki+kubernetes.io@posteo.de
stable/chaoskube/README.md
+24 -21
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@@ -37,27 +37,30 @@ If you're sure you want to use it run `helm` with:
$ helm install stable/chaoskube --set dryRun=false
```
| Parameter | Description | Default |
|---------------------------|-----------------------------------------------------|-----------------------------------|
| `name` | container name | chaoskube |
| `image` | docker image | quay.io/linki/chaoskube |
| `imageTag` | docker image tag | v0.8.0 |
| `replicas` | number of replicas to run | 1 |
| `interval` | interval between pod terminations | 10m |
| `labels` | label selector to filter pods by | "" (matches everything) |
| `annotations` | annotation selector to filter pods by | "" (matches everything) |
| `namespaces` | namespace selector to filter pods by | "" (all namespaces) |
| `dryRun` | don't kill pods, only log what would have been done | true |
| `timezone` | Set timezone for running actions (Optional) | "" (UTC) |
| `excludedWeekdays` | Set Days of the Week to avoid actions (Optional) | "" (Don't skip any weekdays) |
| `excludedTimesOfDay` | Set Time Range to avoid actions (Optional) | "" (Don't skip any times of day) |
| `excludedDaysOfYear` | Set Days of the Year to avoid actions (Optional) | "" (Don't skip any days) |
| `resources.cpu` | cpu resource requests and limits | 10m |
| `resources.memory` | memory resource requests and limits | 16Mi |
| `priorityClassName` | priorityClassName | `nil` |
| `rbac.create` | create rbac service account and roles | false |
| `rbac.serviceAccountName` | name of serviceAccount to use when create is false | default |
| `nodeSelector` | node labels for pod assignment | `{}` |
| Parameter | Description | Default |
|---------------------------|-----------------------------------------------------|----------------------------------|
| `name` | container name | chaoskube |
| `image` | docker image | quay.io/linki/chaoskube |
| `imageTag` | docker image tag | v0.9.0 |
| `replicas` | number of replicas to run | 1 |
| `interval` | interval between pod terminations | 10m |
| `labels` | label selector to filter pods by | "" (matches everything) |
| `annotations` | annotation selector to filter pods by | "" (matches everything) |
| `namespaces` | namespace selector to filter pods by | "" (all namespaces) |
| `dryRun` | don't kill pods, only log what would have been done | true |
| `debug` | Enable debug logging mode, for detailed logs | false |
| `timezone` | Set timezone for running actions (Optional) | "" (UTC) |
| `excludedWeekdays` | Set Days of the Week to avoid actions (Optional) | "" (Don't skip any weekdays) |
| `excludedTimesOfDay` | Set Time Range to avoid actions (Optional) | "" (Don't skip any times of day) |
| `excludedDaysOfYear` | Set Days of the Year to avoid actions (Optional) | "" (Don't skip any days) |
| `priorityClassName` | priorityClassName | `nil` |
| `rbac.create` | create rbac service account and roles | false |
| `rbac.serviceAccountName` | name of serviceAccount to use when create is false | default |
| `resources` | CPU/Memory resource requests/limits | `{}` |
| `nodeSelector` | Node labels for pod assignment | `{}` |
| `tolerations` | Toleration labels for pod assignment | `[]` |
| `affinity` | Affinity settings for pod assignment | `{}` |
Setting label and namespaces selectors from the shell can be tricky but is possible (example with zsh):
stable/chaoskube/templates/NOTES.txt
+2 -2
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@@ -2,8 +2,8 @@ chaoskube is running and will kill arbitrary pods every {{ .Values.interval }}.
You can follow the logs to see what chaoskube does:
POD=$(kubectl get pods -l app={{ printf "%s-%s" .Release.Name .Values.name }} --namespace {{ .Release.Namespace }} --output name)
kubectl logs -f $POD --namespace={{ .Release.Namespace }}
POD=$(kubectl -n {{ .Release.Namespace }} get pods -l='release={{ template "chaoskube.fullname" . }}' --output=jsonpath='{.items[0].metadata.name}')
kubectl -n {{ .Release.Namespace }} logs -f $POD
{{ if .Values.dryRun }}
You are running in dry-run mode. No pod is actually terminated.
{{ end -}}
stable/chaoskube/templates/_helpers.tpl
+45
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@@ -0,0 +1,45 @@
{{/* vim: set filetype=mustache: */}}
{{/*
Expand the name of the chart.
*/}}
{{- define "chaoskube.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 "chaoskube.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 "chaoskube.chart" -}}
{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
{{- end -}}
{{- /*
Credit: @technosophos
https://github.com/technosophos/common-chart/
labels.standard prints the standard Helm labels.
The standard labels are frequently used in metadata.
*/ -}}
{{- define "labels.standard" -}}
app: {{ include "chaoskube.name" . }}
heritage: {{ .Release.Service | quote }}
release: {{ .Release.Name | quote }}
chart: {{ include "chaoskube.chart" . }}
{{- end -}}
stable/chaoskube/templates/clusterrole.yaml
+2 -5
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@@ -1,12 +1,9 @@
{{- if .Values.rbac.create -}}
apiVersion: rbac.authorization.k8s.io/v1beta1
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
app: {{ printf "%s-%s" .Release.Name .Values.name }}
chart: {{ .Chart.Name }}-{{ .Chart.Version }}
heritage: {{ .Release.Service }}
release: {{ .Release.Name }}
{{ include "labels.standard" . | indent 4 }}
name: {{ printf "%s-%s" .Release.Name .Values.name }}
rules:
- apiGroups:
stable/chaoskube/templates/clusterrolebinding.yaml
+2 -5
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@@ -1,12 +1,9 @@
{{- if .Values.rbac.create -}}
apiVersion: rbac.authorization.k8s.io/v1beta1
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
app: {{ printf "%s-%s" .Release.Name .Values.name }}
chart: {{ .Chart.Name }}-{{ .Chart.Version }}
heritage: {{ .Release.Service }}
release: {{ .Release.Name }}
{{ include "labels.standard" . | indent 4 }}
name: {{ printf "%s-%s" .Release.Name .Values.name }}
roleRef:
apiGroup: rbac.authorization.k8s.io
stable/chaoskube/templates/deployment.yaml
+38 -34
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@@ -1,49 +1,53 @@
apiVersion: extensions/v1beta1
apiVersion: apps/v1
kind: Deployment
metadata:
name: {{ printf "%s-%s" .Release.Name .Values.name }}
name: {{ include "chaoskube.fullname" . }}
labels:
app: {{ printf "%s-%s" .Release.Name .Values.name }}
chart: {{ .Chart.Name }}-{{ .Chart.Version }}
release: {{ .Release.Name }}
heritage: {{ .Release.Service }}
{{ include "labels.standard" . | indent 4 }}
spec:
replicas: {{ .Values.replicas }}
selector:
matchLabels:
app: {{ include "chaoskube.name" . }}
release: {{ .Release.Name }}
template:
metadata:
labels:
app: {{ printf "%s-%s" .Release.Name .Values.name }}
chart: {{ .Chart.Name }}-{{ .Chart.Version }}
release: {{ .Release.Name }}
heritage: {{ .Release.Service }}
{{ include "labels.standard" . | indent 8 }}
spec:
containers:
- name: {{ .Values.name }}
image: {{ .Values.image }}:{{ .Values.imageTag }}
args:
- --interval={{ .Values.interval }}
- --labels={{ .Values.labels }}
- --annotations={{ .Values.annotations }}
- --namespaces={{ .Values.namespaces }}
{{- if not .Values.dryRun }}
- --no-dry-run
{{- end }}
- --excluded-weekdays={{ .Values.excludedWeekdays }}
- --excluded-times-of-day={{ .Values.excludedTimesOfDay }}
- --excluded-days-of-year={{ .Values.excludedDaysOfYear }}
- --timezone={{ .Values.timezone }}
resources:
requests:
cpu: {{ .Values.resources.cpu }}
memory: {{ .Values.resources.memory }}
limits:
cpu: {{ .Values.resources.cpu }}
memory: {{ .Values.resources.memory }}
- name: {{ .Values.name }}
image: {{ .Values.image }}:{{ .Values.imageTag }}
args:
- --interval={{ .Values.interval }}
- --labels={{ .Values.labels }}
- --annotations={{ .Values.annotations }}
- --namespaces={{ .Values.namespaces }}
{{- if not .Values.dryRun }}
- --no-dry-run
{{- end }}
- --excluded-weekdays={{ .Values.excludedWeekdays }}
- --excluded-times-of-day={{ .Values.excludedTimesOfDay }}
- --excluded-days-of-year={{ .Values.excludedDaysOfYear }}
- --timezone={{ .Values.timezone }}
{{- if .Values.debug }}
- --debug
{{- end }}
resources:
{{ toYaml .Values.resources | indent 12 }}
{{- if .Values.priorityClassName }}
priorityClassName: "{{ .Values.priorityClassName }}"
{{- end }}
serviceAccountName: {{ if .Values.rbac.create }}{{ printf "%s-%s" .Release.Name .Values.name }}{{ else }}"{{ .Values.rbac.serviceAccountName }}"{{ end }}
{{- if .Values.nodeSelector }}
{{- with .Values.nodeSelector }}
nodeSelector:
{{ toYaml .Values.nodeSelector | indent 8 }}
{{- end -}}
{{ toYaml . | indent 8 }}
{{- end }}
{{- with .Values.affinity }}
affinity:
{{ toYaml . | indent 8 }}
{{- end }}
{{- with .Values.tolerations }}
tolerations:
{{ toYaml . | indent 8 }}
{{- end }}
stable/chaoskube/templates/role.yaml
+2 -5
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@@ -1,12 +1,9 @@
{{- if .Values.rbac.create -}}
apiVersion: rbac.authorization.k8s.io/v1beta1
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
labels:
app: {{ printf "%s-%s" .Release.Name .Values.name }}
chart: {{ .Chart.Name }}-{{ .Chart.Version }}
heritage: {{ .Release.Service }}
release: {{ .Release.Name }}
{{ include "labels.standard" . | indent 4 }}
name: {{ printf "%s-%s" .Release.Name .Values.name }}
rules:
- apiGroups:
stable/chaoskube/templates/rolebinding.yaml
+2 -5
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@@ -1,12 +1,9 @@
{{- if .Values.rbac.create -}}
apiVersion: rbac.authorization.k8s.io/v1beta1
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
app: {{ printf "%s-%s" .Release.Name .Values.name }}
chart: {{ .Chart.Name }}-{{ .Chart.Version }}
heritage: {{ .Release.Service }}
release: {{ .Release.Name }}
{{ include "labels.standard" . | indent 4 }}
name: {{ printf "%s-%s" .Release.Name .Values.name }}
roleRef:
apiGroup: rbac.authorization.k8s.io
stable/chaoskube/templates/serviceaccount.yaml
+1 -4
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@@ -3,9 +3,6 @@ apiVersion: v1
kind: ServiceAccount
metadata:
labels:
app: {{ printf "%s-%s" .Release.Name .Values.name }}
chart: {{ .Chart.Name }}-{{ .Chart.Version }}
heritage: {{ .Release.Service }}
release: {{ .Release.Name }}
{{ include "labels.standard" . | indent 4 }}
name: {{ printf "%s-%s" .Release.Name .Values.name }}
{{- end -}}
stable/chaoskube/values.yaml
+27 -8
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@@ -5,7 +5,7 @@ name: chaoskube
image: quay.io/linki/chaoskube
# docker image tag
imageTag: v0.8.0
imageTag: v0.9.0
# number of replicas to run
replicas: 1
@@ -25,6 +25,9 @@ namespaces:
# don't kill pods, only log what would have been done
dryRun: true
# Enable debug logging
debug: false
# Set values for exempting specific week days from Chaoskube Actions
excludedWeekdays:
@@ -37,11 +40,6 @@ excludedDaysOfYear:
# Set specific Timezone for Actions to take place
timezone: UTC
# resource requests and limits
resources:
cpu: 10m
memory: 16Mi
priorityClassName: ""
# create service account with permission to list and kill pods
@@ -51,6 +49,27 @@ rbac:
# only used when create is false
serviceAccountName: default
# Node labels for pod assignment
# Ref: https://kubernetes.io/docs/user-guide/node-selection/
resources: {}
## We usually recommend not to specify default resources and to leave this as a conscious
## choice for the user. This also increases chances charts run on environments with little
## resources, such as Minikube. If you do want to specify resources, uncomment the following
## lines, adjust them as necessary, and remove the curly braces after 'resources:'.
# limits:
# cpu: 100m
# memory: 128Mi
# requests:
# cpu: 100m
# memory: 128Mi
nodeSelector: {}
tolerations: []
affinity: {}
## Suggested antiAffinity, as each CA should be on a separate Node for resilience
# podAntiAffinity:
# requiredDuringSchedulingIgnoredDuringExecution:
# - topologyKey: "kubernetes.io/hostname"
# labelSelector:
# matchLabels:
# app: chaoskube