1、配置部署模板
配置好用户权限之后就可以部署应用了oc常用的两种部署方式:
Deploy Image方式
优点:这种方式是最简单的部署方式,你只需要有一个容器镜像就行了或者公开的docker hub 镜像
缺点:但是这种方式的确定是不能随时变更,也不能提前定义其他配置
比较适合部署那些不经常变更的第三方服务
catalog方式(template)
优点:可以基于模板提前定义各种配置包括build、service、deployments等
缺点:一个类型的应用需要独立的模板
比较适合自己开发的应用使用,使用template可以省去上线新应用的时间
oc的catalog里面包括大量的模板常用的一些数据库一些开发环境都有
下面主要说一下自定义个模板怎么创建
# vim nginx-openresty.yaml apiVersion: template.openshift.io/v1
kind: Template
metadata:
annotations:
description: OpenResty(又称:ngx_openresty) 是一个基于 NGINX 的可伸缩的 Web 平台,由中国人章亦春发起,提供了很多高质量的第三方模块。
tags: nodejs
creationTimestamp: --10T07::57Z
name: nginx-openresty
namespace: openshift
resourceVersion: ""
selfLink: /apis/template.openshift.io/v1/namespaces/openshift/templates/nginx-openresty
uid: 9d1b5626-cc5c-11e8-a187-00163e0e008f
objects:
- apiVersion: v1
kind: Route
metadata:
name: ${APP_NAME}
spec:
host: ${DOMAIN_NAME}
to:
kind: Service
name: ${APP_NAME}
- apiVersion: v1
kind: Service
metadata:
name: ${APP_NAME}
spec:
ports:
- name: ${APP_NAME}
port:
targetPort:
selector:
name: ${APP_NAME}
type: ClusterIP
- apiVersion: v1
kind: ImageStream
metadata:
name: ${APP_NAME}
- apiVersion: v1
kind: BuildConfig
metadata:
labels:
name: ${APP_NAME}
name: ${APP_NAME}
spec:
output:
to:
kind: ImageStreamTag
name: ${APP_NAME}:latest
postCommit: {}
resources: {}
runPolicy: Serial
source:
contextDir: /
git:
ref: ${APP_SOURCE_REPOSITORY_REF}
uri: ${APP_SOURCE_REPOSITORY_URL}
sourceSecret:
name: gitlab-user
type: Git
strategy:
sourceStrategy:
env:
- name: env
value: ${ENV}
- name: Project_Name
value: ${APP_NAME}
from:
kind: ImageStreamTag
name: ${APP_BUILDER_IMAGE}
namespace: openshift
type: Source
triggers:
- imageChange: {}
- type: ImageChang
- apiVersion: v1
kind: DeploymentConfig
metadata:
labels:
name: ${APP_NAME}
name: ${APP_NAME}
spec:
replicas:
selector:
name: ${APP_NAME}
strategy:
customParams:
command:
- /bin/sh
- -c
- sleep ; echo slept for ; /usr/bin/openshift-deploy
type: Rolling
template:
metadata:
labels:
name: ${APP_NAME}
spec:
containers:
- env:
- name: ETCD_URL
value: ${ETCD_URL}
- name: env
value: ${ENV}
- name: NODE_ENV
value: container
image: ${APP_NAME}:latest
livenessProbe:
failureThreshold:
httpGet:
path: /status
port:
scheme: HTTP
initialDelaySeconds:
periodSeconds:
successThreshold:
timeoutSeconds:
name: ${APP_NAME}
ports:
- containerPort:
protocol: TCP
readinessProbe:
failureThreshold:
httpGet:
path: /status
port:
scheme: HTTP
initialDelaySeconds:
periodSeconds:
successThreshold:
timeoutSeconds:
resources:
limits:
cpu: ${CPU_LIMIT}
memory: ${MEMORY_LIMIT}
requests:
cpu: 50m
memory: 64Mi
volumeMounts:
- mountPath: /opt/configration
name: configration
- mountPath: /etc/localtime
name: localtime
- mountPath: /etc/timezone
name: timezone
volumes:
- configMap:
defaultMode:
name: configration
name: configration
- hostPath:
path: /etc/localtime
name: localtime
- hostPath:
path: /etc/timezone
name: timezone
test: false
triggers:
- imageChangeParams:
automatic: true
containerNames:
- ${APP_NAME}
from:
kind: ImageStreamTag
name: ${APP_NAME}:latest
type: ImageChange
- type: ConfigChange
parameters:
- description: 项目名
displayName: Name
name: APP_NAME
required: true
- description: 对外暴露域名
displayName: Project domain name
name: DOMAIN_NAME
required: true
- description: 请输入Git地址.仅支持HTTP方式.
displayName: Source Repository URL
name: APP_SOURCE_REPOSITORY_URL
required: true
value: http://git.xxx.cn/ops/nginx-config.git
- description: git仓库的默认分支或者版本号
displayName: Git Reference
name: APP_SOURCE_REPOSITORY_REF
required: true
value: config-a
- description: git仓库的路径
displayName: Context Directory
name: CONTEXT_DIR
value: /
- description: 设定当前环境,比如test、bts
displayName: ENV
name: ENV
required: true
- description: build 时使用的基础镜像
displayName: Base builder image of your app
name: APP_BUILDER_IMAGE
required: true
value: openresty:1.11.2.3
- description: 超过此请求额度会被强制重启.单位Mi/Gi.
displayName: Memory Limits
name: MEMORY_LIMIT
required: true
value: 64Mi
- description: 超过此请求额度会被强制重启.单位m/g.
displayName: CPU Limits
name: CPU_LIMIT
required: true
value: 50m
下一步导入到oc catalog里面
# oc project openshift
# oc oc create -f nginx-openresty.yaml
在登陆oc的web console 就可以使用nginx-openresty模板部署应用了
2、deployment策略
deployment顾名思义是最终部署应用的重要环节,包括了变更策略、最终POD的运行配置等关键信息
Deployment Strategy:
这个是部署应用是的变更策略一共有三种策略
Rolling(滚动升级)
spec:
strategy:
rollingParams:
intervalSeconds:
maxSurge: %
maxUnavailable: %
timeoutSeconds:
updatePeriodSeconds:
type: Rolling
Recreate(重新创建)
spec:
strategy:
type: Recreate
Custom(自定义)
不常用
Deployment Triggers:
这个配置决定了什么情况下Deployment 才会触发
ImageChange 镜像变更
ConfigChange Deployment 配置变更
spec:
triggers:
- imageChangeParams:
automatic: true
containerNames:
- nginx-template
from:
kind: ImageStreamTag
name: 'nginx-template:latest'
namespace: test
type: ImageChange
- type: ConfigChange
triggers:
- imageChangeParams:
automatic: true
containerNames:
- nginx-template
from:
kind: ImageStreamTag
name: 'nginx-template:latest'
namespace: test
type: ImageChange #镜像更新
- type: ConfigChange #Deployment 配置更新