Docker Swarm集群配置与使用
机器准备
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安装好Linux，关闭防火墙，关闭 selinux，可以只配置1个NAT网卡，可参考：Vmware下安装Rocky Linux9.4
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安装好Docker，可参考：Rocky Linux9下安装Docker和卸载Docker
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使用第一台Linux机器完整克隆得到三台机器。
修改ip地址
分别修改三台机器的ip地址
查看网卡配置文件 [root@localhost ~]# ls /etc/NetworkManager/system-connections/ ens33.nmconnection 修改网卡，如果有多张网卡，修改NAT类型的那张网卡 [root@localhost ~]# vi /etc/NetworkManager/system-connections/ens33.nmconnection
修改ip地址，每台机器的ip要不一样
第一台机器
[ipv4] address1=192.168.193.151/24,192.168.193.2 dns=114.114.114.114;8.8.8.8; method=manual
第二台机器
[ipv4] address1=192.168.193.152/24,192.168.193.2 dns=114.114.114.114;8.8.8.8; method=manual
第三台机器
[ipv4] address1=192.168.193.153/24,192.168.193.2 dns=114.114.114.114;8.8.8.8; method=manual
修改主机名称
第一台机器
[root@localhost ~]# hostnamectl set-hostname swarm-manager01
第二台机器
[root@localhost ~]# hostnamectl set-hostname swarm-worker01
第三台机器
[root@localhost ~]# hostnamectl set-hostname swarm-worker02
修改/etc/hosts映射ip和主机名
三台机器均执行
[root@localhost ~]# vi /etc/hosts
三台机器均添加如下内容
192.168.193.151 swarm-manager01 m1 192.168.193.152 swarm-worker01 w1 192.168.193.153 swarm-worker02 w2
三台机器均重启机器生效
[root@localhost ~]# reboot
集群规划
| 集群机器 | swarm-manager01 | swarm-worker01 | swarm-worker02 |
|---|---|---|---|
| 集群角色 | manager | worker | worker |
Docker Swarm集群配置
初始化manger
[root@swarm-manager01 ~]# docker swarm init Swarm initialized: current node (rcmlknoggnz81dfd5b5k778o7) is now a manager. To add a worker to this swarm, run the following command: docker swarm join --token SWMTKN-1-3do5k5ownszjyyql3nznnmndft3ws7bzclhb4hwj2h8v3s325j-0i8z9k57p7hk141srhemsci4e 192.168.193.151:2377 To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions. [root@swarm-manager01 ~]#
根据输出日志提示，找到如下内容，并复制添加worker的命令：
添加worker命令如下: docker swarm join --token SWMTKN-1-3do5k5ownszjyyql3nznnmndft3ws7bzclhb4hwj2h8v3s325j-0i8z9k57p7hk141srhemsci4e 192.168.193.151:2377 注意：--token后面的值每个人的会不一样，一定要复制自己执行命令输出日志中的docker swarm join命令。 添加manager命令如下： docker swarm join-token manager
添加worker
在worker角色的机器，执行上一步从日志中复制得到的添加worker命令
swarm-worker01机器
[root@swarm-worker01 ~]# docker swarm join --token SWMTKN-1-3do5k5ownszjyyql3nznnmndft3ws7bzclhb4hwj2h8v3s325j-0i8z9k57p7hk141srhemsci4e 192.168.193.151:2377 This node joined a swarm as a worker.
swarm-worker02机器
[root@swarm-worker02 ~]# docker swarm join --token SWMTKN-1-3do5k5ownszjyyql3nznnmndft3ws7bzclhb4hwj2h8v3s325j-0i8z9k57p7hk141srhemsci4e 192.168.193.151:2377 This node joined a swarm as a worker.
提示：
如果找不到token，使用如下命令查看token
[root@swarm-manager01 ~]# docker swarm join-token worker To add a worker to this swarm, run the following command: docker swarm join --token SWMTKN-1-3do5k5ownszjyyql3nznnmndft3ws7bzclhb4hwj2h8v3s325j-0i8z9k57p7hk141srhemsci4e 192.168.193.151:2377
验证信息
docker info看到Swarm: active及Swarm相关信息为正常
[root@swarm-manager01 ~]# docker info Client: Docker Engine - Community Version: 27.3.1 Context: default Debug Mode: false Plugins: buildx: Docker Buildx (Docker Inc.) Version: v0.17.1 Path: /usr/libexec/docker/cli-plugins/docker-buildx compose: Docker Compose (Docker Inc.) Version: v2.29.7 Path: /usr/libexec/docker/cli-plugins/docker-compose Server: Containers: 1 Running: 0 Paused: 0 Stopped: 1 Images: 1 Server Version: 27.3.1 Storage Driver: overlay2 Backing Filesystem: xfs Supports d_type: true Using metacopy: false Native Overlay Diff: true userxattr: false Logging Driver: json-file Cgroup Driver: systemd Cgroup Version: 2 Plugins: Volume: local Network: bridge host ipvlan macvlan null overlay Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog Swarm: active NodeID: rcmlknoggnz81dfd5b5k778o7 Is Manager: true ClusterID: h5pz39obu2gnufvdkm4masczp Managers: 1 Nodes: 3 Data Path Port: 4789 Orchestration: Task History Retention Limit: 5 Raft: Snapshot Interval: 10000 Number of Old Snapshots to Retain: 0 Heartbeat Tick: 1 Election Tick: 10 Dispatcher: Heartbeat Period: 5 seconds CA Configuration: Expiry Duration: 3 months Force Rotate: 0 Autolock Managers: false Root Rotation In Progress: false Node Address: 192.168.193.151 Manager Addresses: 192.168.193.151:2377 Runtimes: io.containerd.runc.v2 runc Default Runtime: runc Init Binary: docker-init containerd version: 7f7fdf5fed64eb6a7caf99b3e12efcf9d60e311c runc version: v1.1.14-0-g2c9f560 init version: de40ad0 Security Options: seccomp Profile: builtin cgroupns Kernel Version: 5.14.0-427.37.1.el9_4.x86_64 Operating System: Rocky Linux 9.4 (Blue Onyx) OSType: linux Architecture: x86_64 CPUs: 4 Total Memory: 3.543GiB Name: swarm-manager01 ID: dbd0ed83-4c48-4b00-9892-951baaed7707 Docker Root Dir: /var/lib/docker Debug Mode: false Experimental: false Insecure Registries: 127.0.0.0/8 Registry Mirrors: https://public.ecr.aws/ https://dockerhub.timeweb.cloud/ https://docker.m.daocloud.io/ https://kfp63jaj.mirror.aliyuncs.com/ https://docker.mirrors.ustc.edu.cn/ https://mirror.iscas.ac.cn/ https://docker.registry.cyou/ https://docker-cf.registry.cyou/ https://dockercf.jsdelivr.fyi/ https://docker.jsdelivr.fyi/ https://dockertest.jsdelivr.fyi/ https://mirror.aliyuncs.com/ https://dockerproxy.com/ https://mirror.baidubce.com/ https://docker.nju.edu.cn/ https://docker.mirrors.sjtug.sjtu.edu.cn/ https://docker.rainbond.cc/ Live Restore Enabled: false WARNING: bridge-nf-call-iptables is disabled WARNING: bridge-nf-call-ip6tables is disabled [root@swarm-manager01 ~]#
上面docker info命令输出内容较多，可以用如下命令过滤出swarm相关信息，如下
[root@swarm-manager01 ~]# docker info -f '{{.Swarm}}'
{rcmlknoggnz81dfd5b5k778o7 192.168.193.151 active true [{rcmlknoggnz81dfd5b5k778o7 192.168.193.151:2377}] 3 1 0xc0003989a0 []}
查看节点信息
[root@swarm-manager01 ~]# docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION rcmlknoggnz81dfd5b5k778o7 * swarm-manager01 Ready Active Leader 27.3.1 cl5d8lcbsr63gr6tc4k0z7wg0 swarm-worker01 Ready Active 27.3.1 vbsdoepbteh83v2lq58jbdraa swarm-worker02 Ready Active 27.3.1
看到AVAILABILITY均为Active，其中swarm-manager01机器是Leader
节点下线
[root@swarm-manager01 ~]# docker node update --availability drain swarm-worker01 swarm-worker01 [root@swarm-manager01 ~]# docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION rcmlknoggnz81dfd5b5k778o7 * swarm-manager01 Ready Active Leader 27.3.1 cl5d8lcbsr63gr6tc4k0z7wg0 swarm-worker01 Ready Drain 27.3.1 vbsdoepbteh83v2lq58jbdraa swarm-worker02 Ready Active 27.3.1
节点上线
[root@swarm-manager01 ~]# docker node update --availability active swarm-worker01 swarm-worker01 [root@swarm-manager01 ~]# docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION rcmlknoggnz81dfd5b5k778o7 * swarm-manager01 Ready Active Leader 27.3.1 cl5d8lcbsr63gr6tc4k0z7wg0 swarm-worker01 Ready Active 27.3.1 vbsdoepbteh83v2lq58jbdraa swarm-worker02 Ready Active 27.3.1
删除worker节点
[root@swarm-manager01 ~]# docker node rm -f swarm-worker02 swarm-worker02 [root@swarm-manager01 ~]# docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION rcmlknoggnz81dfd5b5k778o7 * swarm-manager01 Ready Active Leader 27.3.1 cl5d8lcbsr63gr6tc4k0z7wg0 swarm-worker01 Ready Active 27.3.1
再次加入worker节点
查看token [root@swarm-manager01 ~]# docker swarm join-token worker To add a worker to this swarm, run the following command: docker swarm join --token SWMTKN-1-3do5k5ownszjyyql3nznnmndft3ws7bzclhb4hwj2h8v3s325j-0i8z9k57p7hk141srhemsci4e 192.168.193.151:2377 [root@swarm-manager01 ~]# 在需要加入的worker节点运行如下命令 [root@swarm-worker02 ~]# docker swarm join --token SWMTKN-1-3do5k5ownszjyyql3nznnmndft3ws7bzclhb4hwj2h8v3s325j-0i8z9k57p7hk141srhemsci4e 192.168.193.151:2377 Error response from daemon: This node is already part of a swarm. Use "docker swarm leave" to leave this swarm and join another one. 先执行自动离开 [root@swarm-worker02 ~]# docker swarm leave Node left the swarm. 重新加入集群 [root@swarm-worker02 ~]# docker swarm join --token SWMTKN-1-3do5k5ownszjyyql3nznnmndft3ws7bzclhb4hwj2h8v3s325j-0i8z9k57p7hk141srhemsci4e 192.168.193.151:2377 This node joined a swarm as a worker. 在manager主机执行 [root@swarm-manager01 ~]# docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION rcmlknoggnz81dfd5b5k778o7 * swarm-manager01 Ready Active Leader 27.3.1 cl5d8lcbsr63gr6tc4k0z7wg0 swarm-worker01 Ready Active 27.3.1 ywp8ooinwiua72af3psojepjr swarm-worker02 Ready Active 27.3.1
将 worker 提升为 manager
docker node promote <主机或ID>
操作
[root@swarm-manager01 ~]# docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION rcmlknoggnz81dfd5b5k778o7 * swarm-manager01 Ready Active Leader 27.3.1 cl5d8lcbsr63gr6tc4k0z7wg0 swarm-worker01 Ready Active 27.3.1 ywp8ooinwiua72af3psojepjr swarm-worker02 Ready Active 27.3.1 [root@swarm-manager01 ~]# docker node promote swarm-worker01 Node swarm-worker01 promoted to a manager in the swarm. [root@swarm-manager01 ~]# docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION rcmlknoggnz81dfd5b5k778o7 * swarm-manager01 Ready Active Leader 27.3.1 cl5d8lcbsr63gr6tc4k0z7wg0 swarm-worker01 Ready Active Reachable 27.3.1 ywp8ooinwiua72af3psojepjr swarm-worker02 Ready Active 27.3.1 [root@swarm-manager01 ~]# docker node promote ywp8ooinwiua72af3psojepjr Node ywp8ooinwiua72af3psojepjr promoted to a manager in the swarm. [root@swarm-manager01 ~]# docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION rcmlknoggnz81dfd5b5k778o7 * swarm-manager01 Ready Active Leader 27.3.1 cl5d8lcbsr63gr6tc4k0z7wg0 swarm-worker01 Ready Active Reachable 27.3.1 ywp8ooinwiua72af3psojepjr swarm-worker02 Ready Active Reachable 27.3.1
当Leader的Manager出故障时，Reachable的主机就通过一定机制（Raft算法）当选为Leader
Leader机器关机 [root@swarm-manager01 ~]# init 0 worker01机器执行命令，看到worker01变为了Leader [root@swarm-worker01 ~]# docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION rcmlknoggnz81dfd5b5k778o7 swarm-manager01 Unknown Active Unreachable 27.3.1 cl5d8lcbsr63gr6tc4k0z7wg0 * swarm-worker01 Unknown Active Leader 27.3.1 ywp8ooinwiua72af3psojepjr swarm-worker02 Unknown Active Reachable 27.3.1 当manager01再次开机，查看节点状态 [root@swarm-manager01 ~]# docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION rcmlknoggnz81dfd5b5k778o7 * swarm-manager01 Ready Active Reachable 27.3.1 cl5d8lcbsr63gr6tc4k0z7wg0 swarm-worker01 Ready Active Leader 27.3.1 ywp8ooinwiua72af3psojepjr swarm-worker02 Ready Active Reachable 27.3.1
Manager节点降级为worker
docker node demote <主机或ID>
操作过程
[root@swarm-manager01 ~]# docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION rcmlknoggnz81dfd5b5k778o7 * swarm-manager01 Ready Active Reachable 27.3.1 cl5d8lcbsr63gr6tc4k0z7wg0 swarm-worker01 Ready Active Leader 27.3.1 ywp8ooinwiua72af3psojepjr swarm-worker02 Ready Active Reachable 27.3.1 [root@swarm-manager01 ~]# docker node demote swarm-worker01 Manager swarm-worker01 demoted in the swarm. [root@swarm-manager01 ~]# docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION rcmlknoggnz81dfd5b5k778o7 * swarm-manager01 Ready Active Leader 27.3.1 cl5d8lcbsr63gr6tc4k0z7wg0 swarm-worker01 Ready Active 27.3.1 ywp8ooinwiua72af3psojepjr swarm-worker02 Ready Active Reachable 27.3.1 [root@swarm-manager01 ~]# docker node demote swarm-worker02 Manager swarm-worker02 demoted in the swarm. [root@swarm-manager01 ~]# docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION rcmlknoggnz81dfd5b5k778o7 * swarm-manager01 Ready Active Leader 27.3.1 cl5d8lcbsr63gr6tc4k0z7wg0 swarm-worker01 Ready Active 27.3.1 ywp8ooinwiua72af3psojepjr swarm-worker02 Ready Active 27.3.1
Docker Swarm集群的使用
部署服务
部署服务 [root@swarm-manager01 ~]# docker service create --replicas 1 --name nginxtest -p 80:80 nginx 16usw3u7rpzz2n8trlx139k1k overall progress: 0 out of 1 tasks overall progress: 0 out of 1 tasks overall progress: 0 out of 1 tasks overall progress: 1 out of 1 tasks 1/1: running [==================================================>] verify: Service 16usw3u7rpzz2n8trlx139k1k converged 查看镜像，只有1台机器有nginx镜像 [root@swarm-manager01 ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE hello-world latest d2c94e258dcb 17 months ago 13.3kB [root@swarm-worker01 ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE nginx <none> 7f553e8bbc89 4 days ago 192MB hello-world latest d2c94e258dcb 17 months ago 13.3kB [root@swarm-worker02 ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE hello-world latest d2c94e258dcb 17 months ago 13.3kB
查看服务列表
在manager机器执行如下命令 [root@swarm-manager01 ~]# docker service ls ID NAME MODE REPLICAS IMAGE PORTS 16usw3u7rpzz nginxtest replicated 1/1 nginx:latest *:80->80/tcp
访问服务
使用swarm集群任意一台机器的主机名:端口，都可以访问到服务内容
[root@swarm-manager01 ~]# curl swarm-manager01:80
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html { color-scheme: light dark; }
body { width: 35em; margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif; }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
[root@swarm-manager01 ~]# curl swarm-worker01:80
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html { color-scheme: light dark; }
body { width: 35em; margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif; }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
[root@swarm-manager01 ~]# curl swarm-worker02:80
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html { color-scheme: light dark; }
body { width: 35em; margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif; }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
[root@swarm-manager01 ~]# curl nginxtest:80
curl: (6) Could not resolve host: nginxtest
[root@swarm-manager01 ~]#
显示详细信息
docker service inspect --pretty <service-id || service-name>
[root@swarm-manager01 ~]# docker service inspect --pretty nginxtest ID: 16usw3u7rpzz2n8trlx139k1k Name: nginxtest Service Mode: Replicated Replicas: 1 Placement: UpdateConfig: Parallelism: 1 On failure: pause Monitoring Period: 5s Max failure ratio: 0 Update order: stop-first RollbackConfig: Parallelism: 1 On failure: pause Monitoring Period: 5s Max failure ratio: 0 Rollback order: stop-first ContainerSpec: Image: nginx:latest@sha256:d2eb56950b84efe34f966a2b92efb1a1a2ea53e7e93b94cdf45a27cf3cd47fc0 Init: false Resources: Endpoint Mode: vip Ports: PublishedPort = 80 Protocol = tcp TargetPort = 80 PublishMode = ingress [root@swarm-manager01 ~]#
查看哪些节点正在运行服务
docker service ps <service-id || service-name> [root@swarm-manager01 ~]# docker service ps nginxtest ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS 8386rrtz7333 nginxtest.1 nginx:latest swarm-worker01 Running Running 12 minutes ago lm8o4xs3wbag \_ nginxtest.1 nginx:latest swarm-manager01 Shutdown Rejected 13 minutes ago "No such image: nginx:latest@s…" ogm99z0w9q40 \_ nginxtest.1 nginx:latest swarm-worker01 Shutdown Shutdown 12 minutes ago
服务扩容
服务扩容
[root@swarm-manager01 ~]# docker service scale nginxtest=3
nginxtest scaled to 3
overall progress: 3 out of 3 tasks
1/3: running [==================================================>]
2/3: running [==================================================>]
3/3: running [==================================================>]
verify: Service nginxtest converged
查看进程
[root@swarm-manager01 ~]# docker service ps nginxtest
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
8386rrtz7333 nginxtest.1 nginx:latest swarm-worker01 Running Running 16 minutes ago
lm8o4xs3wbag \_ nginxtest.1 nginx:latest swarm-manager01 Shutdown Rejected 16 minutes ago "No such image: nginx:latest@s…"
ogm99z0w9q40 \_ nginxtest.1 nginx:latest swarm-worker01 Shutdown Shutdown 16 minutes ago
qsfgvj08ztfp nginxtest.2 nginx:latest swarm-worker02 Running Running 35 seconds ago
sa1wnrlun0v0 nginxtest.3 nginx:latest swarm-manager01 Running Running about a minute ago
查看镜像，三台机器都有nginx镜像
[root@swarm-manager01 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx <none> 7f553e8bbc89 4 days ago 192MB
hello-world latest d2c94e258dcb 17 months ago 13.3kB
[root@swarm-worker01 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx <none> 7f553e8bbc89 4 days ago 192MB
hello-world latest d2c94e258dcb 17 months ago 13.3kB
[root@swarm-worker02 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx <none> 7f553e8bbc89 4 days ago 192MB
hello-world latest d2c94e258dcb 17 months ago 13.3kB
访问测试，访问curl m1:80 curl w1:80 curl w2:80 均可访问到
[root@swarm-worker02 ~]# curl w2:80
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html { color-scheme: light dark; }
body { width: 35em; margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif; }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
服务缩容
[root@swarm-manager01 ~]# docker service scale nginxtest=1 nginxtest scaled to 1 overall progress: 1 out of 1 tasks 1/1: running [==================================================>] verify: Service nginxtest converged [root@swarm-manager01 ~]# docker service ps nginxtest ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS 8386rrtz7333 nginxtest.1 nginx:latest swarm-worker01 Running Running 23 minutes ago lm8o4xs3wbag \_ nginxtest.1 nginx:latest swarm-manager01 Shutdown Rejected 23 minutes ago "No such image: nginx:latest@s…" ogm99z0w9q40 \_ nginxtest.1 nginx:latest swarm-worker01 Shutdown Shutdown 23 minutes ago
删除服务
docker service rm <service-id || service-name> [root@swarm-manager01 ~]# docker service rm nginxtest nginxtest [root@swarm-manager01 ~]# docker service ls ID NAME MODE REPLICAS IMAGE PORTS
删除不需要的镜像
# 缩容和删除服务，均不会删除下载的镜像 [root@swarm-manager01 ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE nginx <none> 7f553e8bbc89 4 days ago 192MB hello-world latest d2c94e258dcb 17 months ago 13.3kB [root@swarm-manager01 ~]# docker rmi 7f5 [root@swarm-worker01 ~]# docker rmi 7f5 [root@swarm-worker02 ~]# docker rmi 7f5
滚动更新服务
部署一个nginx服务，版本号为1.26.2，然后升级版本为1.27.2。
部署一个nginx:1.26.2服务 [root@swarm-manager01 ~]# docker service create --replicas 3 --name nginxtestupd --update-delay 10s -p 80:80 nginx:1.26.2 79s8sd9pv1pqpqxk0tk7w7rvs overall progress: 3 out of 3 tasks 1/3: running [==================================================>] 2/3: running [==================================================>] 3/3: running [==================================================>] verify: Service 79s8sd9pv1pqpqxk0tk7w7rvs converged 该标志配置对服务任务或任务集的更新之间的时间延迟。你可以将时间描述为秒数、分钟数或小时数的组合 --update-delay [root@swarm-manager01 ~]# docker service inspect --pretty nginxtestupd ID: 79s8sd9pv1pqpqxk0tk7w7rvs Name: nginxtestupd Service Mode: Replicated Replicas: 3 Placement: UpdateConfig: Parallelism: 1 Delay: 10s On failure: pause Monitoring Period: 5s Max failure ratio: 0 Update order: stop-first RollbackConfig: Parallelism: 1 On failure: pause Monitoring Period: 5s Max failure ratio: 0 Rollback order: stop-first ContainerSpec: Image: nginx:1.26.2@sha256:e489771d6058fca1d9bd57757b0136383c454989a868c62cded241ae1513e47f Init: false Resources: Endpoint Mode: vip Ports: PublishedPort = 80 Protocol = tcp TargetPort = 80 PublishMode = ingress [root@swarm-manager01 ~]#
滚动更新镜像
docker service update --image nginx:1.27.2 nginxtestupd [root@swarm-manager01 ~]# docker service update --image nginx:1.27.2 nginxtestupd nginxtestupd overall progress: 3 out of 3 tasks 1/3: running [==================================================>] 2/3: running [==================================================>] 3/3: running [==================================================>] verify: Service nginxtestupd converged [root@swarm-manager01 ~]# docker service inspect --pretty nginxtestupd ID: 79s8sd9pv1pqpqxk0tk7w7rvs Name: nginxtestupd Service Mode: Replicated Replicas: 3 UpdateStatus: State: completed Started: About a minute ago Completed: 5 seconds ago Message: update completed Placement: UpdateConfig: Parallelism: 1 Delay: 10s On failure: pause Monitoring Period: 5s Max failure ratio: 0 Update order: stop-first RollbackConfig: Parallelism: 1 On failure: pause Monitoring Period: 5s Max failure ratio: 0 Rollback order: stop-first ContainerSpec: Image: nginx:1.27.2@sha256:d2eb56950b84efe34f966a2b92efb1a1a2ea53e7e93b94cdf45a27cf3cd47fc0 Init: false Resources: Endpoint Mode: vip Ports: PublishedPort = 80 Protocol = tcp TargetPort = 80 PublishMode = ingress [root@swarm-manager01 ~]# 删除服务 [root@swarm-manager01 ~]# docker service rm nginxtestupd nginxtestupd [root@swarm-manager01 ~]# docker service ls ID NAME MODE REPLICAS IMAGE PORTS
完成！enjoy it！
原文地址：https://blog.csdn.net/qq_42881421/article/details/143397255
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