docker-swarm及其图形监控_docker swarm 监控图形-优快云博客

本文链接：https://blog.youkuaiyun.com/xbw_linux123/article/details/81877454

本文介绍了如何使用Docker Swarm创建一个由manager和worker节点组成的集群，并详细阐述了节点的加入过程。通过在manager节点上设置环境，其他worker节点成功加入。接着，文章演示了如何调整容器副本数量实现负载均衡，并利用visualizer进行图形化监控。在完成集群配置后，作者展示了如何将nginx更新为game2048服务，并且提到了实时更新和监控的机制。

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Docker-swarm 将节点分为 manager 和 worker

172.25.70.1 做manager(server1)
172.25.70.2(server2)和172.25.70.3(server3)做worker
1、在 manager（server1）端创建 swarm 环境,获取 token

[root@server1 ~]# yum install docker-engine-17.03.1.ce-1.el7.centos.x86_64.rpm docker-engine-selinux-17.03.1.ce-1.el7.centos.noarch.rpm -y
systemctl start docker  ###打开docker

[root@server1 ~]#docker load -i nginx.tar  ###导入镜像
[root@server1 ~]#docker images

[root@server1 ~]# docker swarm init
Swarm initialized: current node (ws7do7nl2pe6muszdi2496ien) is now a manager.

To add a worker to this swarm, run the following command:

    docker swarm join \
    --token SWMTKN-1-618pcfkdqk2pe4zkmsjrhc54t98pdu7p63663mh2gsfjnfde30-f0n9q09uqjlsu54md04efhyo6 \
    172.25.70.1:2377

To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.

这里写图片描述
其他两个 worker 节点加入到 swarm cluster
在server2中：

[root@server2 ~]# yum install docker-engine-17.03.1.ce-1.el7.centos.x86_64.rpm docker-engine-selinux-17.03.1.ce-1.el7.centos.noarch.rpm -y
systemctl start docker  ###打开docker

[root@server2 ~]# docker load -i nginx.tar 
cdb3f9544e4c: Loading layer 58.44 MB/58.44 MB
a8c4aeeaa045: Loading layer 54.24 MB/54.24 MB
08d25fa0442e: Loading layer 3.584 kB/3.584 kB
Loaded image: nginx:latest
[root@server2 ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
nginx               latest              c82521676580        4 weeks ago         109 MB

###添加节点
[root@server2 ~]# docker swarm join \
> --token SWMTKN-1-618pcfkdqk2pe4zkmsjrhc54t98pdu7p63663mh2gsfjnfde30-f0n9q09uqjlsu54md04efhyo6 \
> 172.25.70.1:2377
This node joined a swarm as a worker.

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在server3中：

[root@server3 ~]# yum install docker-engine-17.03.1.ce-1.el7.centos.x86_64.rpm docker-engine-selinux-17.03.1.ce-1.el7.centos.noarch.rpm -y
systemctl start docker  ###打开docker

[root@server3 ~]# docker load -i nginx.tar 
cdb3f9544e4c: Loading layer 58.44 MB/58.44 MB
a8c4aeeaa045: Loading layer 54.24 MB/54.24 MB
08d25fa0442e: Loading layer 3.584 kB/3.584 kB
Loaded image: nginx:latest
[root@server3 ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
nginx               latest              c82521676580        4 weeks ago         109 MB

###添加节点
[root@server3 ~]# docker swarm join \  
> --token SWMTKN-1-618pcfkdqk2pe4zkmsjrhc54t98pdu7p63663mh2gsfjnfde30-f0n9q09uqjlsu54md04efhyo6 \
>  172.25.70.1:2377
This node joined a swarm as a worker.

这里写图片描述
在 manager 端查看 swarm 节点信息

[root@server1 ~]# docker service create --name web --replicas 3 -p 80:80 nginx
[root@server1 ~]# docker service ls  
###列出添加的服务
[root@server1 ~]# docker service ps web
###在三个节点均匀分配
ID            NAME   IMAGE  NODE                 DESIRED STATE  CURRENT STATE               ERROR  PORTS
obe02qsraelh  web.1  nginx  server2.example.com  Running        Running about a minute ago         
zlcczu386m7g  web.2  nginx  server3.example.com  Running        Running about a minute ago         
4h4192vsdmj3  web.3  nginx  server1.example.com  Running        Running about a minute ago

这里写图片描述
网页访问查看

编辑默认发布目录，写入复制到nginx容器下
在server1中：

[root@server1 ~]# vim index.html
[root@server1 ~]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
0ac1f8091ef9        nginx:latest        "nginx -g 'daemon ..."   7 minutes ago       Up 7 minutes        80/tcp              web.3.4h4192vsdmj3oxyvms5qd5u2e
[root@server1 ~]# docker container cp index.html 0ac1f8091ef9:/usr/share/nginx/html
###复制到nginx容器下

这里写图片描述
在server2上：

[root@server2 ~]# vim index.html
[root@server2 ~]# cat index.html 
<h1>server2-swarm</h1>
[root@server2 ~]# docker container cp index.html ef0c9379200f:/usr/share/nginx/html

这里写图片描述
在server3上：

[root@server3 ~]# vim index.html
[root@server3 ~]# cat index.html 
<h1>server3-swarm</h1>
[root@server3 ~]# docker container cp index.html e4913a11cd89:/usr/share/nginx/html

这里写图片描述
测试其负载均衡

scale参数：
其可以调整容器副本的个数

[root@server1 ~]# docker service scale web=6
unable to pin image nginx to digest: Get https://registry-1.docker.io/v2/: dial tcp: lookup registry-1.docker.io on [::1]:53: read udp [::1]:47034->[::1]:53: read: connection refused
web scaled to 6
[root@server1 ~]# docker service ls
ID            NAME  MODE        REPLICAS  IMAGE
jvycnhw4wkah  web   replicated  6/6       nginx

这里写图片描述

[root@server1 ~]# docker service ps web
##查看添加的web服务的状态

这里写图片描述
visualizer图形监控

[root@server1 ~]# docker load -i visualizer.tar 

Loaded image: dockersamples/visualizer:latest
[root@server1 ~]# docker images
REPOSITORY                 TAG                 IMAGE ID            CREATED             SIZE
nginx                      latest              c82521676580        4 weeks ago         109 MB
dockersamples/visualizer   latest              17e55a9b2354        11 months ago       148 MB

完成后创建服务

root@server1 ~]# docker service create  --name=viz  --publish=8080:8080/tcp  --constraint=node.role==manager  --mount=type=bind,src=/var/run/docker.sock,dst=/var/run/docker.sock dockersamples/visualizer
[root@server1 ~]# docker service ls
ID            NAME   MODE        REPLICAS  IMAGE
lzxqvkpnqg80  nginx  replicated  3/3       nginx
z6n7e60ibwq4  viz    replicated  1/1       dockersamples/visualizer

这里写图片描述

在浏览器访问：

在机器上的操作可以实时用图形来监控，将nginx更新为game2048

每10秒更新一此，一次更新10个

root@server1 ~]# docker service update --image westos.org/game2048 --update-parallelism 10 --update-delay 10s nginx
nginx

在浏览器访问：
这里写图片描述