[kubernetes]-OpenKruise原地升级statefulset-蒲公英云

[kubernetes]-OpenKruise原地升级statefulset

r囧r小猫 2023-01-01 07:55 239阅读 0赞

导语：今天了解了一下OpenKruise的特性。打算尝试一下

测试环境：k8s版本1.18

需要CustomResourceWebhookConversion这个特性。建议使用1.18及以上版本

先安装helm3

# 先下载安装包  并解压安装。
# 解压文件
tar zxvf helm-v3.2.3-linux-amd64.tar.gz
cd linux-amd64/
cp -r helm  /usr/local/bin/
# 查看版本号
helm version

用helm安装OpenKruise

helm install kruise https://github.com/openkruise/kruise/releases/download/v0.7.0/kruise-chart.tgz --disable-openapi-validation

出现这个问题报错说是找不到集群集群不可达

是因为helm没指定apiserver的原因，指定一下apiserver就好了。

# 我的是二进制部署的1.18
export KUBERNETES_MASTER=http://127.0.0.1:8080

创建yaml 这个是官方demo

apiVersion: apps.kruise.io/v1beta1
kind: StatefulSet
metadata:
  name: sample
spec:
  replicas: 3
  serviceName: fake-service
  selector:
    matchLabels:
      app: sample
  template:
    metadata:
      labels:
        app: sample
    spec:
      readinessGates:
         # A new condition that ensures the pod remains at NotReady state while the in-place update is happening
      - conditionType: InPlaceUpdateReady
      containers:
      - name: main
        image: nginx:alpine
  podManagementPolicy: Parallel # allow parallel updates, works together with maxUnavailable
  updateStrategy:
    type: RollingUpdate
    rollingUpdate:
      # Do in-place update if possible, currently only image update is supported for in-place update
      podUpdatePolicy: InPlaceIfPossible
      # Allow parallel updates with max number of unavailable instances equals to 2
      maxUnavailable: 2