docker swarm集群安装

- 日理万妓 2022-06-13 02:27 289阅读 0赞

**1.环境准备**

<table> 
 <thead> 
  <tr> 
   <th>ip</th> 
   <th align="center">hostname</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>192.168.1.108</td> 
   <td align="center">master</td> 
  </tr> 
  <tr> 
   <td>192.168.1.109</td> 
   <td align="center">slave1</td> 
  </tr> 
 </tbody> 
</table>

默认的镜像仓库是docker hub

--------------------

**2.安装docker**

> yum install docker

**启动docker，验证是否安装成功,**

> systemctl restart docke  
> docker version

![docker][]

--------------------

**3.安装 docker swarm**

[root@master ~]# docker swarm init --advertise-addr 192.168.1.108
    Cannot connect to the Docker daemon. Is the docker daemon running on this host?
    [root@master ~]# systemctl start docker.service 
    [root@master ~]# docker swarm init --advertise-addr 192.168.1.108
    Swarm initialized: current node (4nsxcqtrorpaxj516i4157xui) is now a manager.
    
    To add a worker to this swarm, run the following command:
    
        docker swarm join \
        --token SWMTKN-1-4gr2j6tq4rj2s8qwty8keiffytp4dp9odqzg15j3ywwuzop3jd-64bap6fe721fzbtjqjnwwprom \
        192.168.1.108:2377
    
    To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
    [root@master ~]# docker info
    ...
    Swarm: active
     NodeID: 4nsxcqtrorpaxj516i4157xui
     Is Manager: true
     ClusterID: f0ybgw82rzwrssb8tu3o8svju
     Managers: 1
     Nodes: 1
     Orchestration:
      Task History Retention Limit: 5
     Raft:
      Snapshot Interval: 10000
      Heartbeat Tick: 1
      Election Tick: 3
     Dispatcher:
      Heartbeat Period: 5 seconds
     CA Configuration:
      Expiry Duration: 3 months
     Node Address: 192.168.1.108
     ...
    [root@master ~]# docker node ls
    ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
    4nsxcqtrorpaxj516i4157xui *  master    Ready   Active        Leader

--------------------

**4.加入节点**

[root@slave1 ~]# docker swarm join \
    >     --token SWMTKN-1-4gr2j6tq4rj2s8qwty8keiffytp4dp9odqzg15j3ywwuzop3jd-64bap6fe721fzbtjqjnwwprom \
    >     192.168.1.108:2377
    This node joined a swarm as a worker.
    
    [root@master ~]# docker node ls
    ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
    4nsxcqtrorpaxj516i4157xui *  master    Ready   Active        Leader
    e5wtqee69oe08i1zk28z4y2oa    slave1    Ready   Active 
    [root@master ~]# docker info
    ...
    Swarm: active
     NodeID: 4nsxcqtrorpaxj516i4157xui
     Is Manager: true
     ClusterID: f0ybgw82rzwrssb8tu3o8svju
     Managers: 1
     Nodes: 2
     Orchestration:
      Task History Retention Limit: 5
     Raft:
      Snapshot Interval: 10000
      Heartbeat Tick: 1
      Election Tick: 3
      ...

**5.查看manager和node的token值**

[root@master ~]# docker  swarm join-token manager
    To add a manager to this swarm, run the following command:
    
        docker swarm join \
        --token SWMTKN-1-4gr2j6tq4rj2s8qwty8keiffytp4dp9odqzg15j3ywwuzop3jd-0gj34e7fvqz22vgli4f1pg9q9 \
        192.168.1.108:2377
    
    [root@master ~]# docker  swarm join-token worker 
    To add a worker to this swarm, run the following command:
    
        docker swarm join \
        --token SWMTKN-1-4gr2j6tq4rj2s8qwty8keiffytp4dp9odqzg15j3ywwuzop3jd-64bap6fe721fzbtjqjnwwprom \
        192.168.1.108:2377

**6.docker servie的使用**

[root@master ~]# docker service create --replicas 1 --name nginxqinzhao nginx
    3yirlwsspt6oi3i8chz9hj1sk
    
    [root@master ~]# docker service ls
    ID            NAME          REPLICAS  IMAGE  COMMAND
    3yirlwsspt6o  nginxqinzhao  1/1       nginx  
    
    [root@master ~]# docker ps
    CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
    618d0364f9b1        nginx:latest        "nginx -g 'daemon off"   4 minutes ago       Up 4 minutes        80/tcp              nginxqinzhao.1.a3y4fjb7gdeqzyzsn3d104sm7
    
    [root@master ~]# docker service scale nginxqinzhao=2
    nginxqinzhao scaled to 2
    
    这个可能要过一段时间
    [root@master ~]# docker service ls
    ID            NAME          REPLICAS  IMAGE  COMMAND
    3yirlwsspt6o  nginxqinzhao  2/2       nginx  
    [root@master ~]# docker service ps nginxqinzhao
    ID                         NAME                IMAGE  NODE    DESIRED STATE  CURRENT STATE            ERROR
    a3y4fjb7gdeqzyzsn3d104sm7  nginxqinzhao.1      nginx  master  Running        Running 10 minutes ago   
    0nqhsurr9i2s7oy1eqqftezer   \_ nginxqinzhao.1  nginx  master  Shutdown       Complete 10 minutes ago  
    46qh0ktmhicflwnefi0kl2ps9  nginxqinzhao.2      nginx  slave1  Running        Running 2 minutes ago  
    
    root@slave1 ~]# docker ps
    CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
    628a6d72ad67        nginx:latest        "nginx -g 'daemon off"   2 minutes ago       Up 2 minutes        80/tcp              nginxqinzhao.2.46qh0ktmhicflwnefi0kl2ps9
    
    [root@master ~]# docker service scale nginxqinzhao=0
    nginxqinzhao scaled to 0
    [root@master ~]# docker ps
    CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
    [root@master ~]# docker service ls
    ID            NAME          REPLICAS  IMAGE  COMMAND
    3yirlwsspt6o  nginxqinzhao  0/0       nginx  
    [root@master ~]# 
    
    root@slave1 ~]# docker ps
    CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
    
    [root@master ~]# docker service rm nginxqinzhao 
    nginxqinzhao
    [root@master ~]# docker service ls
    ID  NAME  REPLICAS  IMAGE  COMMAND
    
    root@master ~]# docker service ps tomcatqinzhao
    ID                         NAME             IMAGE     NODE    DESIRED STATE  CURRENT STATE           ERROR
    5jubgv89xkj40uuusidae04yb  tomcatqinzhao.1  tomcat:6  master  Running        Running 3 minutes ago   
    4b6hvh52m3kban314o427rg4r  tomcatqinzhao.2  tomcat:6  slave1  Running        Running 12 seconds ago
    
    [root@slave1 ~]# docker images 
    REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
    docker.io/tomcat    6                   0694d09013e2        2 weeks ago         355.1 MB
    docker.io/nginx     latest              958a7ae9e569        3 weeks ago         109.4 MB
    
    [root@master ~]# docker images 
    REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
    docker.io/tomcat    6                   0694d09013e2        2 weeks ago         355.1 MB
    docker.io/nginx     latest              958a7ae9e569        3 weeks ago         109.4 MB
    
    [root@master ~]# docker service ps tomcatqinzhao 
    ID                         NAME                 IMAGE     NODE    DESIRED STATE  CURRENT STATE                ERROR
    0j4vrxnjhoic3ycpomelil0d3  tomcatqinzhao.1      tomcat:8  master  Running        Running 9 seconds ago        
    5jubgv89xkj40uuusidae04yb   \_ tomcatqinzhao.1  tomcat:6  master  Shutdown       Shutdown 34 seconds ago      
    8vzitc0p1zdcgqla1l5tawe1z  tomcatqinzhao.2      tomcat:8  slave1  Running        Running 37 seconds ago       
    4b6hvh52m3kban314o427rg4r   \_ tomcatqinzhao.2  tomcat:6  slave1  Shutdown       Shutdown about a minute ago

**7.docker swarm network**

[root@master ~]# docker network ls
    NETWORK ID          NAME                DRIVER              SCOPE
    cf52809866e0        bridge              bridge              local               
    6ced1b95e1c0        docker_gwbridge     bridge              local               
    b2c5a7968ea6        host                host                local               
    8azaxj4t7055        ingress             overlay             swarm               
    e326d6c220ec        none                null                local

**新建service（不带-p参数）使用name=bridge网桥；**  
**新建service（带-p参数）使name=ingress网桥。**  
**容器间互通需使用overlay模式，所以新建一个overlay的网桥。**

[root@master ~]# docker network create -d overlay --subnet 10.254.0.0/16 --gateway 10.254.0.1 test00
    7b1dv1o8htyb5nccs7mvni9k4
    
    [root@master ~]# docker service create --replicas 2 --name tomcat01 --network test00 tomcat:8
    9fu81tdci7xmktdfe9r1zctl6
    
    [root@master ~]# docker service create --replicas 2 --name tomcat02 --network test00 tomcat:8
    3ad0qji2ibcvjdpn49p5n099h
    
    [root@master ~]# docker service ls
    ID            NAME      REPLICAS  IMAGE     COMMAND
    3ad0qji2ibcv  tomcat02  2/2       tomcat:8  
    9fu81tdci7xm  tomcat01  2/2       tomcat:8
    
    [root@master ~]# docker exec -it d8fc90b685e3 /bin/bash
    root@d8fc90b685e3:/usr/local/tomcat# ll 
    bash: ll: command not found
    root@d8fc90b685e3:/usr/local/tomcat# l
    bash: l: command not found
    root@d8fc90b685e3:/usr/local/tomcat# ls
    LICENSE  NOTICE  RELEASE-NOTES  RUNNING.txt  bin  conf  include  lib  logs  native-jni-lib  temp  webapps  work
    root@d8fc90b685e3:/usr/local/tomcat# ip addr
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    31: eth0@if32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UP group default 
        link/ether 02:42:0a:fe:00:06 brd ff:ff:ff:ff:ff:ff
        inet 10.254.0.6/16 scope global eth0
           valid_lft forever preferred_lft forever
        inet 10.254.0.5/32 scope global eth0
           valid_lft forever preferred_lft forever
        inet6 fe80::42:aff:fefe:6/64 scope link 
           valid_lft forever preferred_lft forever
    33: eth1@if34: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default 
        link/ether 02:42:ac:12:00:04 brd ff:ff:ff:ff:ff:ff
        inet 172.18.0.4/16 scope global eth1
           valid_lft forever preferred_lft forever
        inet6 fe80::42:acff:fe12:4/64 scope link 
           valid_lft forever preferred_lft forever
    root@d8fc90b685e3:/usr/local/tomcat# cat /etc/host
    cat: /etc/host: No such file or directory
    root@d8fc90b685e3:/usr/local/tomcat# cat /etc/hosts 
    127.0.0.1   localhost
    ::1 localhost ip6-localhost ip6-loopback
    fe00::0 ip6-localnet
    ff00::0 ip6-mcastprefix
    ff02::1 ip6-allnodes
    ff02::2 ip6-allrouters
    10.254.0.6  d8fc90b685e3
    172.18.0.4  d8fc90b685e3
    root@d8fc90b685e3:/usr/local/tomcat# cat /etc/
    Display all 104 possibilities? (y or n)
    root@d8fc90b685e3:/usr/local/tomcat# cat /etc/resolv.conf 
    search DHCP HOST
    nameserver 127.0.0.11
    options ndots:0
    root@d8fc90b685e3:/usr/local/tomcat# ping tomcat01
    PING tomcat01 (10.254.0.2): 56 data bytes
    64 bytes from 10.254.0.2: icmp_seq=0 ttl=64 time=0.156 ms
    64 bytes from 10.254.0.2: icmp_seq=1 ttl=64 time=0.102 ms
    64 bytes from 10.254.0.2: icmp_seq=2 ttl=64 time=0.101 ms
    64 bytes from 10.254.0.2: icmp_seq=3 ttl=64 time=0.102 ms
    ^C--- tomcat01 ping statistics ---
    4 packets transmitted, 4 packets received, 0% packet loss
    round-trip min/avg/max/stddev = 0.101/0.115/0.156/0.024 ms
    root@d8fc90b685e3:/usr/local/tomcat# ping tomcat02
    PING tomcat02 (10.254.0.5): 56 data bytes
    64 bytes from 10.254.0.5: icmp_seq=0 ttl=64 time=0.046 ms
    64 bytes from 10.254.0.5: icmp_seq=1 ttl=64 time=0.087 ms
    64 bytes from 10.254.0.5: icmp_seq=2 ttl=64 time=0.079 ms
    64 bytes from 10.254.0.5: icmp_seq=3 ttl=64 time=0.077 ms
    ^C--- tomcat02 ping statistics ---
    4 packets transmitted, 4 packets received, 0% packet loss
    round-trip min/avg/max/stddev = 0.046/0.072/0.087/0.000 ms

**外部访问容器**

[root@master ~]# docker service create --replicas 1 --name qinzhao -p 9909:8080 tomcat:8
    08htoygq5jz1djtpl9v87oiwg
    [root@master ~]# docker service ps qinzhao 
    ID                         NAME       IMAGE     NODE    DESIRED STATE  CURRENT STATE           ERROR
    4hjmqswgil07ld38z6krwmjwq  qinzhao.1  tomcat:8  slave1  Running        Running 47 seconds ago

![108][]

--------------------

![109][]

**7.node去激活（drain）**

[root@master ~]# docker node ls
    ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
    4nsxcqtrorpaxj516i4157xui *  master    Ready   Active        Leader
    e5wtqee69oe08i1zk28z4y2oa    slave1    Ready   Active 
    
    [root@master ~]# docker service ls
    ID            NAME      REPLICAS  IMAGE     COMMAND
    08htoygq5jz1  qinzhao   1/1       tomcat:8  
    3ad0qji2ibcv  tomcat02  2/2       tomcat:8  
    9fu81tdci7xm  tomcat01  2/2       tomcat:8  
    [root@master ~]# docker service ps qinzhao
    ID                         NAME       IMAGE     NODE    DESIRED STATE  CURRENT STATE           ERROR
    4hjmqswgil07ld38z6krwmjwq  qinzhao.1  tomcat:8  slave1  Running        Running 18 minutes ago  
    [root@master ~]# docker service ps tomcat02
    ID                         NAME        IMAGE     NODE    DESIRED STATE  CURRENT STATE           ERROR
    4ejujcdpa2jeaf0l1f3pz23zm  tomcat02.1  tomcat:8  master  Running        Running 36 minutes ago  
    275lcqdccaq46ar0tz63cleef  tomcat02.2  tomcat:8  slave1  Running        Running 36 minutes ago  
    
    [root@master ~]# docker node update --availability drain slave1 
    slave1
    [root@master ~]# docker service ps tomcat02
    ID                         NAME            IMAGE     NODE    DESIRED STATE  CURRENT STATE           ERROR
    4ejujcdpa2jeaf0l1f3pz23zm  tomcat02.1      tomcat:8  master  Running        Running 37 minutes ago  
    0p04omx9d3fia6xqgqmhf385d  tomcat02.2      tomcat:8  master  Running        Running 1 seconds ago   
    275lcqdccaq46ar0tz63cleef   \_ tomcat02.2  tomcat:8  slave1  Shutdown       Shutdown 3 seconds ago  
    
    [root@master ~]# docker node ls
    ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
    4nsxcqtrorpaxj516i4157xui *  master    Ready   Active        Leader
    e5wtqee69oe08i1zk28z4y2oa    slave1    Ready   Drain
    
    [root@master ~]# docker node update --availability active slave1 
    slave1
    [root@master ~]# docker node ls
    ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
    4nsxcqtrorpaxj516i4157xui *  master    Ready   Active        Leader
    e5wtqee69oe08i1zk28z4y2oa    slave1    Ready   Active

**8.node角色的升级和降级（promote/demote）**

[root@master ~]# docker node ls
    ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
    4nsxcqtrorpaxj516i4157xui *  master    Ready   Active        Leader
    e5wtqee69oe08i1zk28z4y2oa    slave1    Ready   Active        
    [root@master ~]# docker node promote slave1 
    Node slave1 promoted to a manager in the swarm.
    [root@master ~]# docker node ls
    ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
    4nsxcqtrorpaxj516i4157xui *  master    Ready   Active        Leader
    e5wtqee69oe08i1zk28z4y2oa    slave1    Ready   Active        Reachable
    [root@master ~]# docker node ls
    ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
    4nsxcqtrorpaxj516i4157xui *  master    Ready   Active        Leader
    e5wtqee69oe08i1zk28z4y2oa    slave1    Ready   Active        Reachable
    [root@master ~]# docker node ls
    ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
    4nsxcqtrorpaxj516i4157xui *  master    Ready   Active        Leader
    e5wtqee69oe08i1zk28z4y2oa    slave1    Ready   Active        Reachable
    [root@master ~]# docker node demote slave1 
    Manager slave1 demoted in the swarm.
    [root@master ~]# docker node ls
    ID                           HOSTNAME  STATUS  AVAILABILITY  MANAGER STATUS
    4nsxcqtrorpaxj516i4157xui *  master    Ready   Active        Leader
    e5wtqee69oe08i1zk28z4y2oa    slave1    Ready   Active

**end**

[docker]: /images/20220613/e3db65cd41a3474c869b6eee154e3c98.png
[108]: /images/20220613/54cf5764095a4096a94123fc2ca530be.png
[109]: /images/20220613/d0c48a37c76f429c80aa2206fd26d4d3.png