一、概述

Rancher流水线从逻辑上可以分为两部分，即CI和CD。

CI，可分化为克隆代码、代码打包、发布镜像三部分。

CD，可分为部署镜像。

二、配置

完整的流水线脚本，类似如下：

stages:
- name: build
  steps:
  - runScriptConfig:
      image: maven:3.6.0-jdk-8-alpine
      shellScript: mvn clean package
- name: push-image
  steps:
  - publishImageConfig:
      dockerfilePath: ./Dockerfile
      buildContext: .
      tag: scc/hyperloop-baseapi:${CICD_EXECUTION_SEQUENCE}
      pushRemote: true
      registry: registry.cn-hangzhou.aliyuncs.com
- name: deploy
  steps:
  - applyYamlConfig:
      path: ./deployment.yaml
timeout: 60

2.1克隆代码

此部分为Rancher强制默认，不可操作。

2.2代码打包

一般根据代码语言执行对应的脚本，比如java+maven是

mvn clean package

2.3发布镜像

在代码根路径下创建Dockerfile文件，内容如下：

# 基于java8
FROM openjdk:8-jdk-slim
# 切换到 /opt目录
WORKDIR /opt
# 将编译的jar拷贝的当前目录
ADD target/baseapi.jar .
# 配置启动命令(两种方式，一种是写死在dockerfile，一种是在rancher上配置，相比前者，后者更灵活)
#CMD java -Dlog.kafka.address=$kafka_address -Dlog.kafka.topic=$kafka_topic -Ddisconf.conf_server_host=$conf_server -Ddisconf.env=$Env  -jar /opt/webapps/$jar_file
#CMD java -server -DlogRedisAddress=192.168.1.97 -Dpinpoint.applicationName=baseapi -Dspring.cloud.consul.enabled=true -Dspring.profiles.active=test -Xms512m -Xmx512m -jar /opt/apps/baseapi.jar

注意创建页面配置镜像版本号时，使用环境变量${CICD_EXECUTION_SEQUENCE}

2.4部署镜像

在代码根路径下创建deployment.yaml文件，内容如下：

apiVersion: apps/v1beta2
kind: Deployment
metadata:
  name: baseapi
  namespace: myapps
spec:
  progressDeadlineSeconds: 600
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      workload.user.cattle.io/workloadselector: deployment-myapps-baseapi
  strategy:
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
    type: RollingUpdate
  template:
    metadata:
      annotations:
        cattle.io/timestamp: 2019-01-08T10:18:34Z
      creationTimestamp: null
      labels:
        workload.user.cattle.io/workloadselector: deployment-myapps-baseapi
    spec:
      containers:
      - args:
        - java
        - -server
        - -DlogRedisAddress=192.168.1.97
        - -Dspring.cloud.consul.enabled=true
        - -Dspring.profiles.active=test
        - -jar
        - baseapi.jar
        image: ${CICD_IMAGE}:${CICD_EXECUTION_SEQUENCE}
        imagePullPolicy: Always
        livenessProbe:
          failureThreshold: 3
          httpGet:
            path: /health
            port: 9700
            scheme: HTTP
          initialDelaySeconds: 60
          periodSeconds: 2
          successThreshold: 1
          timeoutSeconds: 2
        name: baseapi
        readinessProbe:
          failureThreshold: 3
          httpGet:
            path: /health
            port: 9700
            scheme: HTTP
          initialDelaySeconds: 60
          periodSeconds: 2
          successThreshold: 2
          timeoutSeconds: 2
        resources: {}
        securityContext:
          allowPrivilegeEscalation: false
          capabilities: {}
          privileged: false
          readOnlyRootFilesystem: false
          runAsNonRoot: false
        stdin: true
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        tty: true
      dnsPolicy: ClusterFirst
      imagePullSecrets:
      - name: ali
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      terminationGracePeriodSeconds: 30

一个快捷的方法就是先手动在Rancher上部署镜像，然后复制yml文件，最后把文件里不必要的信息剔除即可。