利用Registrator和Consul实现mesos task的服务发现

Posted 2020-07-01

实现目的:

因为mesos中实际的工作节点是slave,框架marathon启动的任务(容器)都是在随机的slave上执行,所以在每台slave上启动Registrator,用来发现本机上的容器,它会把当前宿主机上的容器自动注册到consul.但是consul找一台salve启动就行,它会把自己选为leader,其他slave上启动Registrator的时候指定此leader就行

环境:

192.168.0.149	Mesos-master、Zookeeper
192.168.0.161	Mesos-master、Zookeeper、Marathon
192.168.0.174	Mesos-master、Zookeeper
192.168.0.239	Mesos-slave、Consul-server、Registrator
192.168.0.236	Mesos-slave、Registrator

部署:

定义IP

HOST_IP_1=192.168.0.149
HOST_IP_2=192.168.0.161
HOST_IP_3=192.168.0.174

192.168.0.149

启动Zookeeper

[[email protected] ~]# docker run -d --net="host" -e SERVER_ID=1 -e ADDITIONAL_ZOOKEEPER_1=server.1=${HOST_IP_1}:2888:3888 -e ADDITIONAL_ZOOKEEPER_2=server.2=${HOST_IP_2}:2888:3888 -e ADDITIONAL_ZOOKEEPER_3=server.3=${HOST_IP_3}:2888:3888 garland/zookeeper

启动Mesos-master

[[email protected] ~]# docker run --net="host" -p 5050:5050  -e "MESOS_HOSTNAME=${HOST_IP_1}"   -e "MESOS_IP=${HOST_IP_1}" -e "MESOS_ZK=zk://${HOST_IP_1}:2181,${HOST_IP_2}:2181,${HOST_IP_3}:2181/mesos"  -e "MESOS_PORT=5050"  -e "MESOS_LOG_DIR=/var/log/mesos"  -e "MESOS_QUORUM=2"  -e "MESOS_REGISTRY=in_memory"  -e "MESOS_WORK_DIR=/var/lib/mesos"  -d garland/mesosphere-docker-mesos-master

192.168.0.161

启动Zookeeper

[[email protected] ~]# docker run -d  --net="host"   -e SERVER_ID=2  -e ADDITIONAL_ZOOKEEPER_1=server.1=${HOST_IP_1}:2888:3888   -e ADDITIONAL_ZOOKEEPER_2=server.2=${HOST_IP_2}:2888:3888   -e ADDITIONAL_ZOOKEEPER_3=server.3=${HOST_IP_3}:2888:3888   garland/zookeeper

启动Mesos-master

 [[email protected] ~]# docker run --net="host"  -p 5050:5050  -e "MESOS_HOSTNAME=${HOST_IP_2}"   -e "MESOS_IP=${HOST_IP_2}"    -e "MESOS_ZK=zk://${HOST_IP_1}:2181,${HOST_IP_2}:2181,${HOST_IP_3}:2181/mesos"   -e "MESOS_PORT=5050"  -e "MESOS_LOG_DIR=/var/log/mesos" -e "MESOS_QUORUM=2"  -e "MESOS_REGISTRY=in_memory" -e "MESOS_WORK_DIR=/var/lib/mesos"  -d  garland/mesosphere-docker-mesos-master

启动Marathon

[[email protected] ~]# docker run  -d -p  8080:8080  mesosphere/marathonv0.14.0  --master zk://${HOST_IP_1}:2181,${HOST_IP_2}:2181,${HOST_IP_3}:2181/mesos --zk zk://${HOST_IP_1}:2181,${HOST_IP_2}:2181,${HOST_IP_3}:2181/marathon

192.168.0.174

启动Zookeeper

[[email protected] ~]# docker run -d  --net="host"   -e SERVER_ID=3  -e ADDITIONAL_ZOOKEEPER_1=server.1=${HOST_IP_1}:2888:3888   -e ADDITIONAL_ZOOKEEPER_2=server.2=${HOST_IP_2}:2888:3888   -e ADDITIONAL_ZOOKEEPER_3=server.3=${HOST_IP_3}:2888:3888   garland/zookeeper

启动Mesos-master

[[email protected] ~]# docker run --net="host"  -p 5050:5050  -e "MESOS_HOSTNAME=${HOST_IP_3}"   -e "MESOS_IP=${HOST_IP_3}"    -e "MESOS_ZK=zk://${HOST_IP_1}:2181,${HOST_IP_2}:2181,${HOST_IP_3}:2181/mesos"   -e "MESOS_PORT=5050"  -e "MESOS_LOG_DIR=/var/log/mesos" -e "MESOS_QUORUM=2"  -e "MESOS_REGISTRY=in_memory" -e "MESOS_WORK_DIR=/var/lib/mesos"  -d  garland/mesosphere-docker-mesos-master

192.168.0.239

安装Mesos-slave

安装mesosphere源
[[email protected] ~]# rpm -ivh /mesosphere-el-repo-7-1.noarch.rpm
安装mesos
[[email protected] ~]# yum -y install  mesos
配置mesos
[[email protected] ~]# echo zk://192.168.0.149:2181,192.168.0.161:2181,192.168.0.174:2181/mesos > /etc/mesos/zk
[[email protected] ~]# echo 192.168.0.239 | sudo tee /etc/mesos-slave/hostname
[[email protected] ~]# echo ‘docker,mesos‘ > /etc/mesos-slave/containerizers 
启动mesos-slave
[[email protected] ~]# systemctl start   mesos-slave  && systemctl enable  mesos-slave
[[email protected] ~]# systemctl disable mesos-master

启动Consul-server

[[email protected] ~]# docker run -d --name=consul --net=host gliderlabs/consul-server -bootstrap -bind=192.168.0.239

NOTE:一个节点启动就行,它会自己把自己选为leader

测试consul-server

 [[email protected] ~]# curl 192.168.0.239:8500/v1/catalog/services
{"consul":[]}

NOTE:也可以浏览器访问:http://192.168.0.239:8500/ui/

启动Registrator

[[email protected] ~]# docker run -d   --name=registrator \    
 --net=host \    
 --volume=/var/run/docker.sock:/tmp/docker.sock \    
 gliderlabs/registrator:latest  consul://192.168.0.239:8500

测试Registrator是否跟consul结合把服务自动注册到里面,启动一个redis容器测试

[[email protected] ~]# docker run -d -P --name=redis redis
[[email protected] ~]# curl 192.168.0.239:8500/v1/catalog/services
{"consul":[],"redis":[]}

consul现在有个服务叫做redis,我们能看到更多关于这个服务的,比如端口、IP

[[email protected] ~]# curl $(boot2docker ip):8500/v1/catalog/service/redis[{"Node":"boot2docker","Address":"10.0.2.15","ServiceID":"boot2docker:redis:6379","ServiceName":"redis","ServiceTags":null,"ServiceAddress":"","ServicePort":32768}]

所有slave的容器注册信息都可以在consul中看到

也可以用DNS API测试

[[email protected] ~]# dig @127.0.0.1 -p 8600 redis.service.consul

; <<>> DiG 9.9.4-RedHat-9.9.4-18.el7 <<>> @127.0.0.1 -p 8600 redis.service.consul
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 937
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;redis.service.consul.		IN	A

;; ANSWER SECTION:
redis.service.consul.	0	IN	A	192.168.0.239

;; Query time: 1 msec
;; SERVER: 127.0.0.1#8600(127.0.0.1)
;; WHEN: Wed Mar 30 12:43:34 CST 2016
;; MSG SIZE  rcvd: 74

参考文章:

·https://github.com/sekka1/mesosphere-docker

·http://gliderlabs.com/registrator/latest/user/quickstart/

本文出自 “翟军铭的linux博客” 博客，请务必保留此出处http://zhaijunming5.blog.51cto.com/10668883/1758353