交付Dubbo微服务到kubernetes集群
1.基础架构
1.1.架构图
- Zookeeper是Dubbo微服务集群的注册中心
- 它的高可用机制和k8s的etcd集群一致
- java编写，需要jdk环境
1.2.节点规划
| 主机名 | 角色 | ip |
|---|---|---|
| hdss7-11.host.com | k8s代理节点1，zk1 | 10.4.7.11 |
| hdss7-12.host.com | k8s代理节点2，zk2 | 10.4.7.12 |
| hdss7-21.host.com | k8s运算节点1，zk3 | 10.4.7.21 |
| hdss7-22.host.com | k8s运算节点2，jenkins | 10.4.7.22 |
| hdss7-200.host.com | k8s运维节点（docker仓库） | 10.4.7.200 |
2.部署zookeeper
2.1.安装jdk 1.8（3台zk节点都要安装）
//解压、创建软链接
[root@hdss7-11 src]# mkdir /usr/java
[root@hdss7-11 src]# tar xf jdk-8u221-linux-x64.tar.gz -C /usr/java/
[root@hdss7-11 src]# ln -s /usr/java/jdk1.8.0_221/ /usr/java/jdk
[root@hdss7-11 src]# cd /usr/java/
[root@hdss7-11 java]# ll
total 0
lrwxrwxrwx 1 root root 23 Nov 30 17:38 jdk -> /usr/java/jdk1.8.0_221/
drwxr-xr-x 7 10 143 245 Jul 4 19:37 jdk1.8.0_221
//创建环境变量
[root@hdss7-11 java]# vi /etc/profile
export JAVA_HOME=/usr/java/jdk
export PATH=$JAVA_HOME/bin:$JAVA_HOME/bin:$PATH
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/lib/tools.jar
//source并检查
[root@hdss7-11 java]# source /etc/profile
[root@hdss7-11 java]# java -version
java version "1.8.0_221"
Java(TM) SE Runtime Environment (build 1.8.0_221-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.221-b11, mixed mode)
2.2.安装zk（3台节点都要安装）
2.2.1.解压，创建软链接
[root@hdss7-11 src]# tar xf zookeeper-3.4.14.tar.gz -C /opt/
[root@hdss7-11 src]# ln -s /opt/zookeeper-3.4.14/ /opt/zookeeper
2.2.2.创建数据目录和日志目录
[root@hdss7-11 opt]# mkdir -pv /data/zookeeper/data /data/zookeeper/logs
mkdir: created directory ‘/data’
mkdir: created directory ‘/data/zookeeper’
mkdir: created directory ‘/data/zookeeper/data’
mkdir: created directory ‘/data/zookeeper/logs’
2.2.3.配置
//各节点相同
[root@hdss7-11 opt]# vi /opt/zookeeper/conf/zoo.cfg
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/data/zookeeper/data
dataLogDir=/data/zookeeper/logs
clientPort=2181
server.1=zk1.od.com:2888:3888
server.2=zk2.od.com:2888:3888
server.3=zk3.od.com:2888:3888
myid
//各节点不同
[root@hdss7-11 opt]# vi /data/zookeeper/data/myidvi
1
[root@hdss7-12 opt]# vi /data/zookeeper/data/myid
2
[root@hdss7-21 opt]# vi /data/zookeeper/data/myid
3
2.2.4.做dns解析
[root@hdss7-11 opt]# vi /var/named/od.com.zone
$ORIGIN od.com.
$TTL 600 ; 10 minutes
@ IN SOA dns.od.com. dnsadmin.od.com. (
2019111006 ; serial //序列号前滚1
10800 ; refresh (3 hours)
900 ; retry (15 minutes)
604800 ; expire (1 week)
86400 ; minimum (1 day)
)
NS dns.od.com.
$TTL 60 ; 1 minute
dns A 10.4.7.11
harbor A 10.4.7.200
k8s-yaml A 10.4.7.200
traefik A 10.4.7.10
dashboard A 10.4.7.10
zk1 A 10.4.7.11
zk2 A 10.4.7.12
zk3 A 10.4.7.21
[root@hdss7-11 opt]# systemctl restart named
[root@hdss7-11 opt]# dig -t A zk1.od.com @10.4.7.11 +short
10.4.7.11
2.2.4.依次启动并检查
启动
[root@hdss7-11 opt]# /opt/zookeeper/bin/zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@hdss7-12 opt]# /opt/zookeeper/bin/zkServer.sh start
[root@hdss7-21 opt]# /opt/zookeeper/bin/zkServer.sh start
检查
[root@hdss7-11 opt]# netstat -ntlup|grep 2181
tcp6 0 0 :::2181 :::* LISTEN 69157/java
[root@hdss7-11 opt]# zookeeper/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Mode: follower
[root@hdss7-12 opt]# zookeeper/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Mode: leader
3.部署jenkins
3.1.准备镜像
hdss7-200上
[root@hdss7-200 ~]# docker pull jenkins/jenkins:2.190.3
[root@hdss7-200 ~]# docker images |grep jenkins
[root@hdss7-200 ~]# docker tag 22b8b9a84dbe harbor.od.com/public/jenkins:v2.190.3
[root@hdss7-200 ~]# docker push harbor.od.com/public/jenkins:v2.190.3
3.2.制作自定义镜像
3.2.1.生成ssh秘钥对
[root@hdss7-200 ~]# ssh-keygen -t rsa -b 2048 -C "8614610@qq.com" -N "" -f /root/.ssh/id_rsa
- 此处用自己的邮箱
3.2.2.准备get-docker.sh文件
[root@hdss7-200 ~]# curl -fsSL get.docker.com -o get-docker.sh
[root@hdss7-200 ~]# chmod +x get-docker.sh
3.2.3.准备config.json文件
cp /root/.docker/config.json .
cat /root/.docker/config.json
{
"auths": {
"harbor.od.com": {
"auth": "YWRtaW46SGFyYm9yMTIzNDU="
}
},
"HttpHeaders": {
"User-Agent": "Docker-Client/19.03.4 (linux)"
}
3.2.4.创建目录并准备Dockerfile
[root@hdss7-200 ~]# mkdir /data/dockerfile/jenkins -p
[root@hdss7-200 ~]# cd /data/dockerfile/jenkins/
[root@hdss7-200 jenkins]# vi Dockerfile
FROM harbor.od.com/public/jenkins:v2.190.3
USER root
RUN /bin/cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime &&\
echo 'Asia/Shanghai' >/etc/timezone
ADD id_rsa /root/.ssh/id_rsa
ADD config.json /root/.docker/config.json
ADD get-docker.sh /get-docker.sh
RUN echo " StrictHostKeyChecking no" >> /etc/ssh/ssh_config &&\
/get-docker.sh
- 设置容器用户为root
- 设置容器内的时区
- 将创建的ssh私钥加入（使用git拉代码是要用，配对的公钥配置在gitlab中）
- 加入了登陆自建harbor仓库的config文件
- 修改了ssh客户端的配置，不做指纹验证
- 安装一个docker的客户端 //build如果失败，在get-docker.sh 后加--mirror=Aliyun
3.3.制作自定义镜像
//准备所需文件，拷贝至/data/dockerfile/jenkins
[root@hdss7-200 jenkins]# pwd
/data/dockerfile/jenkins
[root@hdss7-200 jenkins]# ll
total 32
-rw------- 1 root root 151 Nov 30 18:35 config.json
-rw-r--r-- 1 root root 349 Nov 30 18:31 Dockerfile
-rwxr-xr-x 1 root root 13216 Nov 30 18:31 get-docker.sh
-rw------- 1 root root 1675 Nov 30 18:35 id_rsa
//执行build
docker build . -t harbor.od.com/infra/jenkins:v2.190.3
//公钥上传到gitee测试此镜像是否可以成功连接
[root@hdss7-200 harbor]# docker run --rm harbor.od.com/infra/jenkins:v2.190.3 ssh -i /root/.ssh/id_rsa -T git@gitee.com
Warning: Permanently added 'gitee.com,212.64.62.174' (ECDSA) to the list of known hosts.
Hi StanleyWang (DeployKey)! You've successfully authenticated, but GITEE.COM does not provide shell access.
Note: Perhaps the current use is DeployKey.
Note: DeployKey only supports pull/fetch operations
3.4.创建infra仓库
3.5.创建kubernetes名称空间并在此创建secret
[root@hdss7-21 ~]# kubectl create namespace infra
[root@hdss7-21 ~]# kubectl create secret docker-registry harbor --docker-server=harbor.od.com --docker-username=admin --docker-password=Harbor12345 -n infra
3.6.推送镜像
[root@hdss7-200 jenkins]# docker push harbor.od.com/infra/jenkins:v2.190.3
3.7.准备共享存储
运维主机hdss7-200和所有运算节点上，这里指hdss7-21、22
3.7.1.安装nfs-utils -y
[root@hdss7-200 jenkins]# yum install nfs-utils -y
3.7.2.配置NFS服务
运维主机hdss7-200上
[root@hdss7-200 jenkins]# vi /etc/exports
/data/nfs-volume 10.4.7.0/24(rw,no_root_squash)
3.7.3.启动NFS服务
运维主机hdss7-200上
[root@hdss7-200 ~]# mkdir -p /data/nfs-volume
[root@hdss7-200 ~]# systemctl start nfs
[root@hdss7-200 ~]# systemctl enable nfs
3.8.准备资源配置清单
运维主机hdss7-200上
[root@hdss7-200 ~]# cd /data/k8s-yaml/
[root@hdss7-200 k8s-yaml]# mkdir /data/k8s-yaml/jenkins && mkdir /data/nfs-volume/jenkins_home && cd jenkins
dp.yaml
[root@hdss7-200 jenkins]# vi dp.yaml
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: jenkins
namespace: infra
labels:
name: jenkins
spec:
replicas: 1
selector:
matchLabels:
name: jenkins
template:
metadata:
labels:
app: jenkins
name: jenkins
spec:
volumes:
- name: data
nfs:
server: hdss7-200
path: /data/nfs-volume/jenkins_home
- name: docker
hostPath:
path: /run/docker.sock
type: ''
containers:
- name: jenkins
image: harbor.od.com/infra/jenkins:v2.190.3
imagePullPolicy: IfNotPresent
ports:
- containerPort: 8080
protocol: TCP
env:
- name: JAVA_OPTS
value: -Xmx512m -Xms512m
volumeMounts:
- name: data
mountPath: /var/jenkins_home
- name: docker
mountPath: /run/docker.sock
imagePullSecrets:
- name: harbor
securityContext:
runAsUser: 0
strategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
maxSurge: 1
revisionHistoryLimit: 7
progressDeadlineSeconds: 600
svc.yaml
[root@hdss7-200 jenkins]# vi dp.yaml
kind: Service
apiVersion: v1
metadata:
name: jenkins
namespace: infra
spec:
ports:
- protocol: TCP
port: 80
targetPort: 8080
selector:
app: jenkins
ingress.yaml
kind: Ingress
apiVersion: extensions/v1beta1
metadata:
name: jenkins
namespace: infra
spec:
rules:
- host: jenkins.od.com
http:
paths:
- path: /
backend:
serviceName: jenkins
servicePort: 80
3.9.应用资源配置清单
任意运算节点上
[root@hdss7-21 etcd]# kubectl apply -f http://k8s-yaml.od.com/jenkins/dp.yaml
[root@hdss7-21 etcd]# kubectl apply -f http://k8s-yaml.od.com/jenkins/svc.yaml
[root@hdss7-21 etcd]# kubectl apply -f http://k8s-yaml.od.com/jenkins/ingress.yaml
[root@hdss7-21 etcd]# kubectl get pods -n infra
NAME READY STATUS RESTARTS AGE
jenkins-54b8469cf9-v46cc 1/1 Running 0 168m
[root@hdss7-21 etcd]# kubectl get all -n infra
NAME READY STATUS RESTARTS AGE
pod/jenkins-54b8469cf9-v46cc 1/1 Running 0 169m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/jenkins ClusterIP 192.168.183.210 <none> 80/TCP 2d21h
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/jenkins 1/1 1 1 2d21h
NAME DESIRED CURRENT READY AGE
replicaset.apps/jenkins-54b8469cf9 1 1 1 2d18h
replicaset.apps/jenkins-6b6d76f456 0 0 0 2d21h
3.10.解析域名
hdss7-11上
[root@hdss7-11 ~]# vi /var/named/od.com.zone
$ORIGIN od.com.
$TTL 600 ; 10 minutes
@ IN SOA dns.od.com. dnsadmin.od.com. (
2019111007 ; serial
10800 ; refresh (3 hours)
900 ; retry (15 minutes)
604800 ; expire (1 week)
86400 ; minimum (1 day)
)
NS dns.od.com.
$TTL 60 ; 1 minute
dns A 10.4.7.11
...
...
jenkins A 10.4.7.10
[root@hdss7-11 ~]# systemctl restart named
[root@hdss7-11 ~]# dig -t A jenkins.od.com @10.4.7.11 +short
10.4.7.10
3.11. 浏览器访问
访问：http://jenkins.od.com 需要输入初始密码：
初始密码查看（也可在log里查看）：
[root@hdss7-200 jenkins]# cat /data/nfs-volume/jenkins_home/secrets/initialAdminPassword
3.12.页面配置jenkins
3.12.1.配置用户名密码
用户名：admin 密码：admin123 //后续依赖此密码，请务必设置此密码
3.12.2.设置configure global security
允许匿名用户访问
阻止跨域请求，勾去掉
3.12.3.安装好流水线插件Blue-Ocean
注意安装插件慢的话可以设置清华大学加速
hdss-200上
cd /data/nfs-volume/jenkins_home/updates
sed -i 's/http:\/\/updates.jenkins-ci.org\/download/https:\/\/mirrors.tuna.tsinghua.edu.cn\/jenkins/g' default.json && sed -i 's/http:\/\/www.google.com/https:\/\/www.baidu.com/g' default.json
4.最后的准备工作
4.1.检查jenkins容器里的docker客户端
验证当前用户，时区
，sock文件是否可用
验证kubernetes名称空间创建的secret是否可登陆到harbor仓库
4.2.检查jenkins容器里的SSH key
验证私钥，是否能登陆到gitee拉代码
4.3.部署maven软件
编译java，早些年用javac-->ant -->maven-->Gragle
在运维主机hdss7-200上二进制部署，这里部署maven-3.6.2版本
mvn命令是一个脚本，如果用jdk7，可以在脚本里修改
4.3.1.下载安装包
4.3.2.创建目录并解压
目录8u232是根据docker容器里的jenkins的jdk版本命名，请严格按照此命名
[root@hdss7-200 src]# mkdir /data/nfs-volume/jenkins_home/maven-3.6.1-8u232
[root@hdss7-200 src]# tar xf apache-maven-3.6.1-bin.tar.gz -C /data/nfs-volume/jenkins_home/maven-3.6.1-8u232
[root@hdss7-200 src]# cd /data/nfs-volume/jenkins_home/maven-3.6.1-8u232
[root@hdss7-200 maven-3.6.1-8u232]# ls
apache-maven-3.6.1
[root@hdss7-200 maven-3.6.1-8u232]# mv apache-maven-3.6.1/ ../ && mv ../apache-maven-3.6.1/* .
[root@hdss7-200 maven-3.6.1-8u232]# ll
total 28
drwxr-xr-x 2 root root 97 Dec 3 19:04 bin
drwxr-xr-x 2 root root 42 Dec 3 19:04 boot
drwxr-xr-x 3 501 games 63 Apr 5 2019 conf
drwxr-xr-x 4 501 games 4096 Dec 3 19:04 lib
-rw-r--r-- 1 501 games 13437 Apr 5 2019 LICENSE
-rw-r--r-- 1 501 games 182 Apr 5 2019 NOTICE
-rw-r--r-- 1 501 games 2533 Apr 5 2019 README.txt
4.3.3.设置settings.xml国内镜像源
搜索替换：
[root@hdss7-200 maven-3.6.1-8u232]# vi /data/nfs-volume/jenkins_home/maven-3.6.1-8u232/conf/settings.xml
<mirror>
<id>nexus-aliyun</id>
<mirrorOf>*</mirrorOf>
<name>Nexus aliyun</name>
<url>http://maven.aliyun.com/nexus/content/groups/public</url>
</mirror>
4.3.制作dubbo微服务的底包镜像
运维主机hdss7-200上
4.3.1.自定义Dockerfile
root@hdss7-200 dockerfile]# mkdir jre8
[root@hdss7-200 dockerfile]# cd jre8/
[root@hdss7-200 jre8]# pwd
/data/dockerfile/jre8
[root@hdss7-200 jre8]# vi Dockfile
FROM harbor.od.com/public/jre:8u112
RUN /bin/cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime &&\
echo 'Asia/Shanghai' >/etc/timezone
ADD config.yml /opt/prom/config.yml
ADD jmx_javaagent-0.3.1.jar /opt/prom/
WORKDIR /opt/project_dir
ADD entrypoint.sh /entrypoint.sh
CMD ["/entrypoint.sh"]
- 普罗米修斯的监控匹配规则
- java agent 收集jvm的信息，采集jvm的jar包
- docker运行的默认启动脚本entrypoint.sh
4.3.2.准备jre底包（7版本有一个7u80）
[root@hdss7-200 jre8]# docker pull docker.io/stanleyws/jre8:8u112
[root@hdss7-200 jre8]# docker images |grep jre
stanleyws/jre8 8u112 fa3a085d6ef1 2 years ago 363MB
[root@hdss7-200 jre8]# docker tag fa3a085d6ef1 harbor.od.com/public/jre:8u112
[root@hdss7-200 jre8]# docker push harbor.od.com/public/jre:8u112
4.3.3.准备java-agent的jar包
[root@hdss7-200 jre8]# wget https://repo1.maven.org/maven2/io/prometheus/jmx/jmx_prometheus_javaagent/0.3.1/jmx_prometheus_javaagent-0.3.1.jar -O jmx_javaagent-0.3.1.jar
4.3.3.准备config.yml和entrypoint.sh
[root@hdss7-200 jre8]# vi config.yml
---
rules:
- pattern: '.*'
[root@hdss7-200 jre8]# vi entrypoint.sh
#!/bin/sh
M_OPTS="-Duser.timezone=Asia/Shanghai -javaagent:/opt/prom/jmx_javaagent-0.3.1.jar=$(hostname -i):${M_PORT:-"12346"}:/opt/prom/config.yml"
C_OPTS=${C_OPTS}
JAR_BALL=${JAR_BALL}
exec java -jar ${M_OPTS} ${C_OPTS} ${JAR_BALL}
[root@hdss7-200 jre8]# chmod +x entrypoint.sh
4.3.4.harbor创建base项目
4.3.5.构建dubbo微服务的底包并推到harbor仓库
[root@hdss7-200 jre8]# docker build . -t harbor.od.com/base/jre8:8u112
[root@hdss7-200 jre8]# docker push harbor.od.com/base/jre8:8u112
5.交付dubbo微服务至kubenetes集群
5.1.配置New job流水线
添加构建参数：
//以下配置项是王导根据多年生产经验总结出来的--运维甩锅大法（姿势要帅，动作要快）
登陆jenkins----->选择NEW-ITEM----->item name ：dubbo-demo----->Pipeline------>ok
需要保留多少此老的构建，这里设置，保留三天，30个
点击：“This project is parameterized”使用参数化构建jenkins
添加参数String Parameter：8个------Trim the string都勾选
app_name
image_name
git_repo
git_ver
add_tag
mvn_dir
target_dir
mvn_cmd
添加Choice Parameter：2个
base_image
maven
5.2..Pipeline Script
pipeline {
agent any
stages {
stage('pull') { //get project code from repo
steps {
sh "git clone ${params.git_repo} ${params.app_name}/${env.BUILD_NUMBER} && cd ${params.app_name}/${env.BUILD_NUMBER} && git checkout ${params.git_ver}"
}
}
stage('build') { //exec mvn cmd
steps {
sh "cd ${params.app_name}/${env.BUILD_NUMBER} && /var/jenkins_home/maven-${params.maven}/bin/${params.mvn_cmd}"
}
}
stage('package') { //move jar file into project_dir
steps {
sh "cd ${params.app_name}/${env.BUILD_NUMBER} && cd ${params.target_dir} && mkdir project_dir && mv *.jar ./project_dir"
}
}
stage('image') { //build image and push to registry
steps {
writeFile file: "${params.app_name}/${env.BUILD_NUMBER}/Dockerfile", text: """FROM harbor.od.com/${params.base_image}
ADD ${params.target_dir}/project_dir /opt/project_dir"""
sh "cd ${params.app_name}/${env.BUILD_NUMBER} && docker build -t harbor.od.com/${params.image_name}:${params.git_ver}_${params.add_tag} . && docker push harbor.od.com/${params.image_name}:${params.git_ver}_${params.add_tag}"
}
}
}
}
5.3.harbor创建app项目，把dubbo服务镜像管理起来
5.4.创建app名称空间，并添加secret资源
任意运算节点上
因为要去拉app私有仓库的镜像，所以添加secret资源
[root@hdss7-21 bin]# kubectl create ns app
namespace/app created
[root@hdss7-21 bin]# kubectl create secret docker-registry harbor --docker-server=harbor.od.com --docker-username=admin --docker-password=Harbor12345 -n app
secret/harbor created
5.5.交付dubbo-demo-service
5.5.1.jenkins传参，构建dubbo-demo-service镜像，传到harbor
5.5.2.创建dubbo-demo-service的资源配置清单
特别注意：dp.yaml的image替换成自己打包的镜像名称
hdss7-200上
[root@hdss7-200 dubbo-demo-service]# vi dp.yaml
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: dubbo-demo-service
namespace: app
labels:
name: dubbo-demo-service
spec:
replicas: 1
selector:
matchLabels:
name: dubbo-demo-service
template:
metadata:
labels:
app: dubbo-demo-service
name: dubbo-demo-service
spec:
containers:
- name: dubbo-demo-service
image: harbor.od.com/app/dubbo-demo-service:master_191201_1200
ports:
- containerPort: 20880
protocol: TCP
env:
- name: JAR_BALL
value: dubbo-server.jar
imagePullPolicy: IfNotPresent
imagePullSecrets:
- name: harbor
restartPolicy: Always
terminationGracePeriodSeconds: 30
securityContext:
runAsUser: 0
schedulerName: default-scheduler
strategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
maxSurge: 1
revisionHistoryLimit: 7
progressDeadlineSeconds: 600
5.5.3.应用dubbo-demo-service资源配置清单
任意运算节点上
[root@hdss7-21 bin]# kubectl apply -f http://k8s-yaml.od.com/dubbo-demo-service/dp.yaml
deployment.extensions/dubbo-demo-service created
5.5.4.检查启动状态
dashboard查看日志
zk注册中心查看
5.6.交付dubbo-Monitor
dubbo-monitor实际上就是从注册中心registry去数据出来然后展示的工具
两个开源软件：1、dubbo-admin 2、dubbo-monitor。此处我们用dubbo-minitor
5.6.1.准备docker镜像
5.6.1.1.下载源码包、解压
[root@hdss7-200 src]# ll|grep dubbo
-rw-r--r-- 1 root root 23468109 Dec 4 11:50 dubbo-monitor-master.zip
[root@hdss7-200 src]# unzip dubbo-monitor-master.zip
[root@hdss7-200 src]# ll|grep dubbo
drwxr-xr-x 3 root root 69 Jul 27 2016 dubbo-monitor-master
-rw-r--r-- 1 root root 23468109 Dec 4 11:50 dubbo-monitor-master.zip
5.6.1.2.修改以下项配置
[root@hdss7-200 conf]# pwd
/opt/src/dubbo-monitor-master/dubbo-monitor-simple/conf
[root@hdss7-200 conf]# vi dubbo_origin.properties
dubbo.registry.address=zookeeper://zk1.od.com:2181?backup=zk2.od.com:2181,zk3.od.com:2181
dubbo.protocol.port=20880
dubbo.jetty.port=8080
dubbo.jetty.directory=/dubbo-monitor-simple/monitor
dubbo.statistics.directory=/dubbo-monitor-simple/statistics
dubbo.charts.directory=/dubbo-monitor-simple/charts
dubbo.log4j.file=logs/dubbo-monitor.log
5.6.1.3.制作镜像
5.6.1.3.1.准备环境
- 由于是虚拟机环境，这里java给的内存太大，需要给小一些，nohup 替换成exec，要在前台跑，去掉结尾&符，删除nohup 行下所有行
[root@hdss7-200 bin]# vi /opt/src/dubbo-monitor-master/dubbo-monitor-simple/bin/start.sh
JAVA_MEM_OPTS=" -server -Xmx2g -Xms2g -Xmn256m -XX:PermSize=128m -Xss256k -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection -XX:LargePageSizeInBytes=128m -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70 "
else
JAVA_MEM_OPTS=" -server -Xms1g -Xmx1g -XX:PermSize=128m -XX:SurvivorRatio=2 -XX:+UseParallelGC "
fi
echo -e "Starting the $SERVER_NAME ...\c"
nohup java $JAVA_OPTS $JAVA_MEM_OPTS $JAVA_DEBUG_OPTS $JAVA_JMX_OPTS -classpath $CONF_DIR:$LIB_JARS com.alibaba.dubbo.container.Main > $STDOUT_FILE 2>&1 &
- sed命令替换，用到了sed模式空间
sed -r -i -e '/^nohup/{p;:a;N;$!ba;d}' ./dubbo-monitor-simple/bin/start.sh && sed -r -i -e "s%^nohup(.*)%exec \1%" /opt/src/dubbo-monitor-master/dubbo-monitor-simple/bin/start.sh
//调小内存，然后nohup行结尾的&去掉！！！
- 为了规范，复制到data下
[root@hdss7-200 src]# mv dubbo-monitor-master dubbo-monitor
[root@hdss7-200 src]# cp -a dubbo-monitor /data/dockerfile/
[root@hdss7-200 src]# cd /data/dockerfile/dubbo-monitor/
5.6.1.3.2.准备Dockerfile
[root@hdss7-200 dubbo-monitor]# pwd
/data/dockerfile/dubbo-monitor
[root@hdss7-200 dubbo-monitor]# cat Dockerfile
FROM jeromefromcn/docker-alpine-java-bash
MAINTAINER Jerome Jiang
COPY dubbo-monitor-simple/ /dubbo-monitor-simple/
CMD /dubbo-monitor-simple/bin/start.sh
5.6.1.3.3.build镜像并push到harbor仓库
[root@hdss7-200 dubbo-monitor]# docker build . -t harbor.od.com/infra/dubbo-monitor:latest
[root@hdss7-200 dubbo-monitor]# docker push harbor.od.com/infra/dubbo-monitor:latest
5.6.2.解析域名
[root@hdss7-11 ~]# vi /var/named/od.com.zone
$ORIGIN od.com.
$TTL 600 ; 10 minutes
@ IN SOA dns.od.com. dnsadmin.od.com. (
2019111008 ; serial
10800 ; refresh (3 hours)
900 ; retry (15 minutes)
604800 ; expire (1 week)
86400 ; minimum (1 day)
)
NS dns.od.com.
。。。略
dubbo-monitor A 10.4.7.10
[root@hdss7-11 ~]# systemctl restart named
[root@hdss7-11 ~]# dig -t A dubbo-monitor.od.com @10.4.7.11 +short
10.4.7.10
5.6.3.准备k8s资源配置清单
- dp.yaml
[root@hdss7-200 k8s-yaml]# pwd
/data/k8s-yaml
[root@hdss7-200 k8s-yaml]# pwd
/data/k8s-yaml
[root@hdss7-200 k8s-yaml]# mkdir dubbo-monitor
[root@hdss7-200 k8s-yaml]# cd dubbo-monitor/
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: dubbo-monitor
namespace: infra
labels:
name: dubbo-monitor
spec:
replicas: 1
selector:
matchLabels:
name: dubbo-monitor
template:
metadata:
labels:
app: dubbo-monitor
name: dubbo-monitor
spec:
containers:
- name: dubbo-monitor
image: harbor.od.com/infra/dubbo-monitor:latest
ports:
- containerPort: 8080
protocol: TCP
- containerPort: 20880
protocol: TCP
imagePullPolicy: IfNotPresent
imagePullSecrets:
- name: harbor
restartPolicy: Always
terminationGracePeriodSeconds: 30
securityContext:
runAsUser: 0
schedulerName: default-scheduler
strategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
maxSurge: 1
revisionHistoryLimit: 7
progressDeadlineSeconds: 600
- svc.yaml
kind: Service
apiVersion: v1
metadata:
name: dubbo-monitor
namespace: infra
spec:
ports:
- protocol: TCP
port: 8080
targetPort: 8080
selector:
app: dubbo-monitor
- ingress.yaml
kind: Ingress
apiVersion: extensions/v1beta1
metadata:
name: dubbo-monitor
namespace: infra
spec:
rules:
- host: dubbo-monitor.od.com
http:
paths:
- path: /
backend:
serviceName: dubbo-monitor
servicePort: 8080
5.6.4.应用资源配置清单
[root@hdss7-21 bin]# kubectl apply -f http://k8s-yaml.od.com/dubbo-monitor/dp.yaml
deployment.extensions/dubbo-monitor created
[root@hdss7-21 bin]# kubectl apply -f http://k8s-yaml.od.com/dubbo-monitor/svc.yaml
service/dubbo-monitor created
[root@hdss7-21 bin]# kubectl apply -f http://k8s-yaml.od.com/dubbo-monitor/ingress.yaml
ingress.extensions/dubbo-monitor created
5.6.5.浏览器访问
5.7.交付dubbo-demo-consumer
5.7.1.jenkins传参，构建dubbo-demo-service镜像，传到harbor
jenkins的jar包本地缓存
5.7.2.创建dubbo-demo-consumer的资源配置清单
运维主机hdss7-200上
特别注意：dp.yaml的image替换成自己打包的镜像名称
dp.yaml
[root@hdss7-200 k8s-yaml]# pwd
/data/k8s-yaml
[root@hdss7-200 k8s-yaml]# mkdir dubbo-demo-consumer
[root@hdss7-200 k8s-yaml]# cd dubbo-demo-consumer/
[root@hdss7-200 k8s-yaml]# vi dp.yaml
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: dubbo-demo-consumer
namespace: app
labels:
name: dubbo-demo-consumer
spec:
replicas: 1
selector:
matchLabels:
name: dubbo-demo-consumer
template:
metadata:
labels:
app: dubbo-demo-consumer
name: dubbo-demo-consumer
spec:
containers:
- name: dubbo-demo-consumer
image: harbor.od.com/app/dubbo-demo-consumer:master_191204_1307
ports:
- containerPort: 8080
protocol: TCP
- containerPort: 20880
protocol: TCP
env:
- name: JAR_BALL
value: dubbo-client.jar
imagePullPolicy: IfNotPresent
imagePullSecrets:
- name: harbor
restartPolicy: Always
terminationGracePeriodSeconds: 30
securityContext:
runAsUser: 0
schedulerName: default-scheduler
strategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
maxSurge: 1
revisionHistoryLimit: 7
progressDeadlineSeconds: 600
svc.yaml
kind: Service
apiVersion: v1
metadata:
name: dubbo-demo-consumer
namespace: app
spec:
ports:
- protocol: TCP
port: 8080
targetPort: 8080
selector:
app: dubbo-demo-consumer
ingress.yaml
kind: Ingress
apiVersion: extensions/v1beta1
metadata:
name: dubbo-demo-consumer
namespace: app
spec:
rules:
- host: demo.od.com
http:
paths:
- path: /
backend:
serviceName: dubbo-demo-consumer
servicePort: 8080
5.7.3.应用dubbo-demo-consumer资源配置清单
任意运算节点上
[root@hdss7-21 bin]# kubectl apply -f http://k8s-yaml.od.com/dubbo-demo-consumer/dp.yaml
deployment.extensions/dubbo-demo-consumer created
[root@hdss7-21 bin]# kubectl apply -f http://k8s-yaml.od.com/dubbo-demo-consumer/svc.yaml
service/dubbo-demo-consumer created
[root@hdss7-21 bin]# kubectl apply -f http://k8s-yaml.od.com/dubbo-demo-consumer/ingress.yaml
ingress.extensions/dubbo-demo-consumer created
5.7.4.解析域名
hdss7-11上
[root@hdss7-11 ~]# vi /var/named/od.com.zone
$ORIGIN od.com.
$TTL 600 ; 10 minutes
@ IN SOA dns.od.com. dnsadmin.od.com. (
2019111009 ; serial
10800 ; refresh (3 hours)
900 ; retry (15 minutes)
604800 ; expire (1 week)
86400 ; minimum (1 day)
)
NS dns.od.com.
$TTL 60 ; 1 minute
dns A 10.4.7.11
...
...
demo A 10.4.7.10
[root@hdss7-11 ~]# systemctl restart named
[root@hdss7-11 ~]# dig -t A demo.od.com @10.4.7.11 +short
10.4.7.10
5.7.5.检查启动状态
dashboard查看：
http://dashboard.od.com
dubbo-monitor查看:
http://dubbo-monitor.od.com
- 访问demo.od.com查看：
http://demo.od.com/hello?name=wang
6.实战维护dubbo微服务集群
6.1.更新（rolling update）
- 修改代码提交GIT（发版）
- 使用jenkins进行CI（持续构建）
- 修改并应用k8s资源配置清单
- 或者在k8s上修改yaml的harbor镜像地址
6.2.扩容（scaling）
- 在k8s的dashboard上直接操作：登陆dashboard页面-->部署-->伸缩-->修改数量-->确定
- 命令行扩容，如下示例：
* Examples:
# Scale a replicaset named 'foo' to 3.
kubectl scale --replicas=3 rs/foo
# Scale a resource identified by type and name specified in "foo.yaml" to 3.
kubectl scale --replicas=3 -f foo.yaml
# If the deployment named mysql's current size is 2, scale mysql to 3.
kubectl scale --current-replicas=2 --replicas=3 deployment/mysql
# Scale multiple replication controllers.
kubectl scale --replicas=5 rc/foo rc/bar rc/baz
# Scale statefulset named 'web' to 3.
kubectl scale --replicas=3 statefulset/web
6.3.宿主机突发故障处理
假如hdss7-21突发故障，离线
- 其他运算节点上操作：先删除故障节点使k8s触发自愈机制，pod在健康节点重新拉起
[root@hdss7-22 ~]# kubectl delete node hdss7-21.host.com
node "hdss7-21.host.com" deleted
- 前端代理修改配置文件，把节点注释掉，使其不再调度到故障节点（hdss-7-21）
[root@hdss7-11 ~]# vi /etc/nginx/nginx.conf
[root@hdss7-11 ~]# vi /etc/nginx/conf.d/od.com.conf
[root@hdss7-11 ~]# nginx -t
[root@hdss7-11 ~]# nginx -s reload
- 节点修好，直接启动，会自行加到集群，修改label，并把节点加回前端负载
[root@hdss7-21 bin]# kubectl label node hdss7-21.host.com node-role.kubernetes.io/master=
node/hdss7-21.host.com labeled
[root@hdss7-21 bin]# kubectl label node hdss7-21.host.com node-role.kubernetes.io/node=
node/hdss7-21.host.com labeled
[root@hdss7-21 bin]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
hdss7-21.host.com Ready master,node 8d v1.15.4
hdss7-22.host.com Ready master,node 10d v1.15.4
6.4.FAQ
6.4.1.supervisor restart 不成功？
/etc/supervisord.d/xxx.ini 追加：
killasgroup=true
stopasgroup=true
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