Image warm for Kubernetes
選択できるのは25トピックまでです。 トピックは、先頭が英数字で、英数字とダッシュ('-')を使用した35文字以内のものにしてください。
Vladimir Smagin 1cbba7c9f3 no, fuck it 1日前
build import 1週間前
cmd/manager import 1週間前
deploy add to dockerhub registry 1週間前
pkg import 1週間前
vendor import 1週間前
version import 1週間前
.gitignore import 1週間前
Dockerfile import 1週間前
Jenkinsfile no, fuck it 1日前
README.md add to dockerhub registry 1週間前
VERSION add version 1週間前
go.mod import 1週間前
go.sum import 1週間前
tools.go import 1週間前

README.md

Warm Image operator for Kubernetes

For example, you have huge image with your software and running POD on node. When POD moving to another node your image downloads to new node minute or two. This operator forces nodes to download image before rescheduling, so POD starts faster.

How it works

It runs /bin/sh with infinite loop on specified image as DaemonSet with additional options like NodeSelector, Affinity or resource limits. You can specify custom command if your image not contains /bin/sh interpreter or you want to run own script.

Deploy operator

Cluster scoped installation:

kubectl create ns warmimage
kubectl -f deploy/crds/blindage.org_warmimages_crd.yaml
kubectl -n warmimage -f deploy/role.yaml
kubectl -n warmimage -f deploy/role_binding.yaml
kubectl -n warmimage -f deploy/service_account.yaml
kubectl -n warmimage -f deploy/operator.yaml

Now create your first warmer

kubectl -n warmimage -f deploy/example/mongo4.yaml

Settings

Required:

  • Set image URL
    image: string

  • Set image tag
    version: string

Additional options:

  • Set custom command
    customCommand: strings list
    Default:
    - “/bin/sh”
    - “-c”
    - “while true; do sleep 86400; done”

  • Add custom labels
    labels: map

  • Affinity, node selection and tolerations
    nodeSelector: default empty
    affinity: default empty
    tolerations: default empty

  • Resource limiting
    podRequests: default empty
    podLimits: default empty

Your first warmer

Create yaml file and place it:

apiVersion: blindage.org/v1alpha1
kind: WarmImage
metadata:
  name: mongo4
spec:
  image: mongo
  version: "4"
  nodeSelector:
    node-role.kubernetes.io/master: ""

Now you warmed mongo:4 on all master nodes.


Copyright by Vladimir Smagin (21h) 2020
http://blindage.org email: 21h@blindage.org
Project page: https://git.blindage.org/21h/warm-image-operator