root@docker-1:~# docker info
Containers: 2
Running: 2
Paused: 0
Stopped: 0
Images: 1
Server Version: 17.05.0-ce
Storage Driver: aufs
Root Dir: /var/lib/docker/aufs
Backing Filesystem: extfs
Dirs: 7
Dirperm1 Supported: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host macvlan null overlay
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 9048e5e50717ea4497b757314bad98ea3763c145
runc version: 9c2d8d184e5da67c95d601382adf14862e4f2228
init version: 949e6fa
Security Options:
apparmor
Kernel Version: 4.4.0-31-generic
Operating System: Ubuntu 14.04.5 LTS
OSType: linux
Architecture: x86_64
CPUs: 1
Total Memory: 726.7MiB
Name: docker-1
ID: A3OC:Z223:S7IY:6KF6:U2TE:N26E:CEMT:2VEH:5AR6:LVY5:U2KI:52P5
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Experimental: false
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: false
WARNING: No swap limit support
root@docker-1:~# docker -H 192.168.1.193:12375 info
Containers: 5
Running: 5
Paused: 0
Stopped: 0
Images: 5
Server Version: swarm/1.2.8
Role: primary
Strategy: spread
Filters: health, port, containerslots, dependency, affinity, constraint, whitelist
Nodes: 3
docker-1: 192.168.1.193:2375
└ ID: A3OC:Z223:S7IY:6KF6:U2TE:N26E:CEMT:2VEH:5AR6:LVY5:U2KI:52P5|192.168.1.193:2375
└ Status: Healthy
└ Containers: 2 (2 Running, 0 Paused, 0 Stopped)
└ Reserved CPUs: 0 / 1
└ Reserved Memory: 0 B / 763 MiB
└ Labels: kernelversion=4.4.0-31-generic, operatingsystem=Ubuntu 14.04.5 LTS, ostype=linux, storagedriver=aufs
└ UpdatedAt: 2017-10-15T13:18:50Z
└ ServerVersion: 17.05.0-ce
docker-2: 192.168.1.194:2375
└ ID: LTSZ:NUCW:U7PJ:E2MB:UD4K:QNS4:EOYG:YC5B:XEYU:BNM5:MZGE:X4R4|192.168.1.194:2375
└ Status: Healthy
└ Containers: 2 (2 Running, 0 Paused, 0 Stopped)
└ Reserved CPUs: 0 / 1
└ Reserved Memory: 0 B / 776.6 MiB
└ Labels: kernelversion=4.4.0-31-generic, operatingsystem=Ubuntu 14.04.5 LTS, ostype=linux, storagedriver=aufs
└ UpdatedAt: 2017-10-15T13:19:04Z
└ ServerVersion: 17.05.0-ce
docker-3: 192.168.1.195:2375
└ ID: A42N:WYIC:KJRG:SPED:IJIS:IYQP:23T4:EWDP:6CT7:IFMB:ZIDF:37WN|192.168.1.195:2375
└ Status: Healthy
└ Containers: 1 (1 Running, 0 Paused, 0 Stopped)
└ Reserved CPUs: 0 / 1
└ Reserved Memory: 0 B / 513.1 MiB
└ Labels: kernelversion=4.4.0-31-generic, operatingsystem=Ubuntu 14.04.5 LTS, ostype=linux, storagedriver=aufs
└ UpdatedAt: 2017-10-15T13:19:03Z
└ ServerVersion: 17.05.0-ce
Plugins:
Volume:
Network:
Swarm:
NodeID:
Is Manager: false
Node Address:
Kernel Version: 4.4.0-31-generic
Operating System: linux
Architecture: amd64
CPUs: 3
Total Memory: 2.005GiB
Name: ad81e842302d
Docker Root Dir:
Debug Mode (client): false
Debug Mode (server): false
Experimental: false
Live Restore Enabled: false
可以发现docker-1上运行有创建manager服务和swarm join时的两个容器，docker-2上运行有swarm join和 ping
(这个容器是在docker-3上通过manager服务创建的，但却运行在docker-2上，可见是swarm集群调度策略分配的）的两个容器，docker-3上只有swarm join
创建一个nginx服务
root@docker-1:~# docker -H 192.168.1.193:12375 run -d --name my-web --publish 8080:80 nginx
2a888979b129767ff73562587e5cf6672aac13c47d69ea4673887d87f6be552a
通过下面命令可以看到nginx运行在docker-3上（swarm调度策略分配的）
root@docker-1:~# docker -H 192.168.1.193:12375 ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2a888979b129 nginx "nginx -g 'daemon ..." 15 seconds ago Up 14 seconds 192.168.1.195:8080->80/tcp docker-3/my-web
41ca94b3da41 centos "ping " 2 hours ago Up 2 hours docker-2/vigilant_bose