k8s在jenkins构建，如何回滚和升级23

Posted 2021-08-24 tty之星

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在自动化发布的时候，会遇到升级和回滚，生产一旦出现异常需要回滚到上一个版本

这里使用pipline来实现，但是需要input做判断，才可以

大概思路是

gitlab拉取代码，然后mvn编译，dockerbuild构建镜像，push到harbor仓库，完成之后开始启动yaml，这里会有个判断是升级还是跳过，y表示升级，n表示跳过，在然后有个判断是回滚，y表示回滚上个版本，n表示跳过

接下来看看配置如下

node(\'haimaxy-jnlp\'){
stage(\'Clone\') {
echo "1.Clone Stage"
git credentialsId: \'5789c68f-ebf6-45b8-b9e5-5648c1a3eb09\', url: \'http://139.155.71.51/root/tomcat.git\'
script {
//获取comment id
env.imageTag = sh (script: \'git rev-parse --short HEAD ${GIT_COMMIT}\', returnStdout: true).trim()
}
}

stage(\'build\') {
echo "2.mvn clean"
sh "cd /home/jenkins/agent/workspace/bbs/solo-master && mvn clean -Dmaven.test.skip=true install -s /home/jenkins/settings/settings.xml"
}
stage(\'build dockerfile\') {
echo "3.build dockerfile"
sh \'\'\'
cd /home/jenkins/agent/workspace/bbs/solo-master/target
REPOSITORY=10.4.7.52/cnych/jenkins-demo:${imageTag}
cat >> Dockerfile << EOF
FROM tomcat:7
RUN mkdir /usr/local/tomcat/webapps/ROOT
ADD ./solo.war /usr/local/tomcat/webapps/ROOT
USER root
EOF
docker build -t $REPOSITORY .
\'\'\'
}
stage(\'docker push \') {
echo "docker run"
sh \'\'\'
REPOSITORY=10.4.7.52/cnych/jenkins-demo:${imageTag}
docker login http://10.4.7.52 -u admin -p Harbor12345
docker push $REPOSITORY
\'\'\'
}
stage(\'kubectl apply\'){
echo "kubectl apply"

echo "是否需要需要升级？"
def userInput = input(
id: \'userInput\',
message: \'是否需要升级？\',
parameters: [
[
$class: \'ChoiceParameterDefinition\',
choices: "N\\nY",
name: \'升级?\'
]
]
)
if (userInput == "Y") {
sh \'\'\'
REPOSITORY=10.4.7.52/cnych/jenkins-demo:${imageTag}
cat >> tomcat.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
name: tomcat-deployment
labels:
app: tomcat
spec:
replicas: 3
selector:
matchLabels:
app: tomcat
minReadySeconds: 5
strategy:
rollingUpdate:
maxSurge: 1
maxUnavailable: 1
template:
metadata:
labels:
app: tomcat
spec:
containers:
- name: tomcat
image: \\$REPOSITORY
ports:
- containerPort: 8080
---
apiVersion: v1
kind: Service
metadata:
name: tomcat-service
labels:
app: tomcat
spec:
ports:
- port: 8080
targetPort: 8080
nodePort: 31305
selector:
app: tomcat
type: NodePort
EOF
kubectl set image deployment/tomcat-deployment tomcat=$REPOSITORY -n kube-ops
\'\'\'
}
}
stage(\'rollout\') {
echo "是否需要快速回滚？"
def userInput = input(
id: \'userInput\',
message: \'是否需要快速回滚？\',
parameters: [
[
$class: \'ChoiceParameterDefinition\',
choices: "N\\nY",
name: \'回滚?\'
]
]
)
if (userInput == "Y") {
sh "kubectl rollout undo deployment tomcat-deployment -n kube-ops"
}

}
}