使用 Helm Chart 部署及卸載 istio

部署 istio

1.添加 istio 官方的 helm 倉庫

helm repo add istio   https://storage.googleapis.com/istio-release/releases/1.3.3/charts/

2.是否添加成功

helm search repo istio

NAME CHART VERSION APP VERSION DESCRIPTION
istio/istio 1.3.3 1.3.3 Helm chart for all istio components
istio/istio-cni 1.3.3 1.3.3 Helm chart for istio-cni components
istio/istio-init 1.3.3 1.3.3 Helm chart to initialize Istio CRDs

3.創建 istio-system 命名空間

kubectl create ns istio-system

4.創建 istio 所需的 crd 文件

helm install istio-init istio/istio-init -n istio-system

5.檢查 CRD 文件是否創建完成，輸出為23

kubectl get crds | grep 'istio.io' | wc -l

23

6.部署 istio

helm install istio istio/istio -n istio-system

NAME: istio
LAST DEPLOYED: Thu Oct 24 12:05:06 2019
NAMESPACE: istio-system
STATUS: deployed
REVISION: 1
NOTES:
Thank you for installing Istio.

Your release is named Istio.

To get started running application with Istio, execute the following steps:

1. Label namespace that application object will be deployed to by the following command (take default namespace as an example)

kubectl label namespace default istio-injection=enabled
​ kubectl get namespace -L istio-injection

1. Deploy your applications

$ kubectl apply -f .yaml

For more information on running Istio, visit:
https://istio.io/

卸載 istio

1.卸載 istio

helm -n istio-system uninstall istio

2.刪除 istio crd 文件

helm -n istio-system uninstall istio-init

kubectl delete crd `kubectl get crd | grep istio| awk '{print $1}'`

一鍵部署及卸載 istio 的腳本

部署腳本

#!/bin/bash

# Add istio official repo
add_repo(){
  VERSION=$1
  REPO="https://storage.googleapis.com/istio-release/releases/${VERSION}/charts/"
  helm repo add istio $REPO

  STATUS_CMD=`echo $?`
  CHECK_REPO_CMD=`helm repo list | grep $REPO | wc -l`
  echo "$STATUS_CMD"
  echo "$CHECK_REPO_CMD"
  while [[ $STATUS_CMD != 0 && $CHECK_REPO_CMD -ge 1 ]]
  do
    sleep 5
    helm repo add istio $REPO

    STATUS_CMD=`echo $?`
    CHECK_REPO_CMD=`helm repo list | grep $REPO | wc -l`
  done
}

# Create istio-system namespace
create_namespace() {
  NAMESPACE=$1
  kubectl create ns ${NAMESPACE}

  STATUS_CMD=`echo $?`
  while [[ $STATUS_CMD != 0 ]]
  do
    sleep 5
    kubectl create ns ${NAMESPACE}
    STATUS_CMD=`echo $?`
  done
}

# Create CRD need for istio
create_crd() {
  NAMESPACE=$1
  helm install istio-init istio/istio-init -n ${NAMESPACE}
  CRD_COUNT=`kubectl get crds | grep 'istio.i' | wc -l`

  while [[ ${CRD_COUNT} != 23 ]]
  do
    sleep 5
    CRD_COUNT=`kubectl get crds | grep 'istio.io' | wc -l`
  done

  echo 'Istio crd create successful'
}

# Deploy istio related components
deploy_istio() {
  NAMESPACE=$1
  VERSION=$2
  helm install istio istio/istio -n ${NAMESPACE}

  check() {
     kubectl -n ${NAMESPACE}  get deploy | grep istio | awk '{print "deployment/"$1}' | while read line ;
     do
       kubectl rollout status $line -n ${NAMESPACE};
     done
  }
  check

  echo "Istio is deployed successful"
}

main(){
  ISTIO_VERSION="1.3.3"
  ISTIO_NAMESPACE="istio-system"
  add_repo $ISTIO_VERSION
  if [[ `kubectl get ns | grep $ISTIO_NAMESPACE | wc -l ` == 0 && `kubectl get ns $ISTIO_NAMESPACE | grep -v NAME | wc -l` == 0 ]] ;then
    create_namespace $ISTIO_NAMESPACE
  fi
  create_crd $ISTIO_NAMESPACE
  deploy_istio $ISTIO_NAMESPACE $ISTIO_VERSION
}

main

卸載腳本

#!/bin/bash

helm -n istio-system uninstall istio 
helm -n istio-system uninstall istio-init
kubectl delete crd `kubectl get crd | grep istio | awk '{print $1}'` 
kubectl delete ns istio-system

註意：卸載需謹慎，刪除了 istio-system 的命名空間

總結

• 點擊查看我的Github
• 點擊查看我的個人Blog
• 日拱一卒，不期速成

上述步驟使用的是 istio 官方提供的預設配置，如果你想要自定配置，可以閱讀 values.yaml 文件後，通過 --set 的方式修改，或者直接修改 chart。

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