kured/charts/kured

Kured (KUbernetes REboot Daemon)

Introduction

This chart installs the "Kubernetes Reboot Daemon" using the Helm Package Manager.

Prerequisites

• Kubernetes 1.9+

Installing the Chart

To install the chart with the release name my-release:

$ helm repo add kured https://weaveworks.github.io/kured
$ helm install my-release kured/kured

Uninstalling the Chart

To uninstall/delete the my-release deployment:

$ helm delete my-release

The command removes all the Kubernetes components associated with the chart and deletes the release.

Migrate from stable Helm-Chart

The following changes have been made compared to the stable chart:

• [BREAKING CHANGE] The autolock feature was removed. Use configuration.startTime and configuration.endTime instead.
• Role inconsistencies have been fixed (allowed verbs for modifying the DaemonSet, apiGroup of PodSecurityPolicy)
• Added support for affinities.
• Configuration of cli-flags can be made through a configuration object.
• Added optional Service and ServiceMonitor support for metrics endpoint.

Configuration

Config	Description	Default
image.repository	Image repository	weaveworks/kured
image.tag	Image tag	1.4.1
image.pullPolicy	Image pull policy	IfNotPresent
image.pullSecrets	Image pull secrets	[]
updateStrategy	Daemonset update strategy	OnDelete
podAnnotations	Annotations to apply to pods (eg to add Prometheus annotations)	{}
extraArgs	Extra arguments to pass to /usr/bin/kured. See below.	{}
configuration.annotationTtl	cli-parameter --annotation-ttl	0
configuration.alertFilterRegexp	cli-parameter --alert-filter-regexp	""
configuration.blockingPodSelector	Array of selectors for multiple cli-parameters --blocking-pod-selector	[]
configuration.endTime	cli-parameter --end-time	""
configuration.lockAnnotation	cli-parameter --lock-annotation	""
configuration.period	cli-parameter --period	""
configuration.prometheusUrl	cli-parameter --prometheus-url	""
configuration.rebootDays	Array of days for multiple cli-parameters --reboot-days	[]
configuration.rebootSentinel	cli-parameter --reboot-sentinel	""
configuration.slackChannel	cli-parameter --slack-channel	""
configuration.slackHookUrl	cli-parameter --slack-hook-url	""
configuration.slackUsername	cli-parameter --slack-username	""
configuration.startTime	cli-parameter --start-time	""
configuration.timeZone	cli-parameter --time-zone	""
rbac.create	Create RBAC roles	true
serviceAccount.create	Create a service account	true
serviceAccount.name	Service account name to create (or use if serviceAccount.create is false)	(chart fullname)
podSecurityPolicy.create	Create podSecurityPolicy	false
resources	Resources requests and limits.	{}
metrics.create	Create a Service for the metrics endpoint	false
metrics.serviceMonitor.create	Create a ServiceMonitor for prometheus-operator	true
metrics.serviceMonitor.namespace	The namespace to create the ServiceMonitor in	""
metrics.serviceMonitor.labels	Additional labels for the ServiceMonitor	{}
metrics.serviceMonitor.interval	Interval prometheus should scrape the endpoint	60s
metrics.serviceMonitor.scrapeTimeout	A custom scrapeTimeout for prometheus	""
priorityClassName	Priority Class to be used by the pods	""
tolerations	Tolerations to apply to the daemonset (eg to allow running on master)	[{"key": "node-role.kubernetes.io/master", "effect": "NoSchedule"}]
affinity	Affinity for the daemonset (ie, restrict which nodes kured runs on)	{}
nodeSelector	Node Selector for the daemonset (ie, restrict which nodes kured runs on)	{}

See https://github.com/weaveworks/kured#configuration for values (not contained in the configuration object) for extraArgs. Note that

extraArgs:
  foo: 1
  bar-baz: 2

becomes /usr/bin/kured ... --foo=1 --bar-baz=2.

Prometheus Metrics

Kured exposes a single prometheus metric indicating whether a reboot is required or not (see kured docs) for details.

Prometheus-Operator

metrics:
  create: true

Prometheus Annotations

podAnnotations:
  prometheus.io/scrape: "true"
  prometheus.io/path: "/metrics"
  prometheus.io/port: "8080"