manage:192.168.5.5

node:192.168.5.3 、 192.168.5.4

Docker Swarm discovery 为 file://path/to/file

cluster文件内容:

192.168.5.3:2375
192.168.5.4:2375

manage(192.168.5.5) command:
docker run -d -it -h node-m --name=node-m --restart=always -v $(pwd)/cluster:/tmp/cluster -p 3375:3375 swarm manage -H 0.0.0.0:3375 file:///tmp/cluster

node1(192.168.5.3) command:
docker run -d -it -h node-1 --name=node-1 -v $(pwd)/cluster:/tmp/cluster swarm join --addr=192.168.5.3:2375 file:///tmp/cluster

node2(92.168.5.4) command:
docker run -d -it -h node-2 --name=node-2 -v $(pwd)/cluster:/tmp/cluster swarm join --addr=192.168.5.4:2375 file:///tmp/cluster

manage(192.168.5.5) command:

[root@manage opt]# docker run --rm -v $(pwd)/cluster:/tmp/cluster swarm list file:///tmp/cluster                                                                          
192.168.5.3:2375
192.168.5.4:2375
[root@manage opt]# docker -H 0.0.0.0:3375 info
Containers: 0
 Running: 0
 Paused: 0
 Stopped: 0
Images: 0
Server Version: swarm/1.2.6
Role: primary
Strategy: spread
Filters: health, port, containerslots, dependency, affinity, constraint, whitelist
Nodes: 2
 (unknown): 192.168.5.3:2375
  └ ID: 
  └ Status: Pending
  └ Containers: 0
  └ Reserved CPUs: 0 / 0
  └ Reserved Memory: 0 B / 0 B
  └ Labels: 
  └ Error: Cannot connect to the Docker daemon at tcp://192.168.5.3:2375. Is the docker daemon running?
  └ UpdatedAt: 2017-04-10T19:03:37Z
  └ ServerVersion: 
 (unknown): 192.168.5.4:2375
  └ ID: 
  └ Status: Pending
  └ Containers: 0
  └ Reserved CPUs: 0 / 0
  └ Reserved Memory: 0 B / 0 B
  └ Labels: 
  └ Error: Cannot connect to the Docker daemon at tcp://192.168.5.4:2375. Is the docker daemon running?
  └ UpdatedAt: 2017-04-10T19:03:37Z
  └ ServerVersion: 
Plugins:
 Volume: 
 Network: 
Swarm: 
 NodeID: 
 Is Manager: false
 Node Address: 
Security Options:
Kernel Version: 3.10.0-514.el7.x86_64
Operating System: linux
Architecture: amd64
Number of Docker Hooks: 2
CPUs: 0
Total Memory: 0 B
Name: node-m
Docker Root Dir: 
Debug Mode (client): false
Debug Mode (server): false
WARNING: No kernel memory limit support
Registries: 

manage、node1、node2 ps -a命令结果

[root@manage opt]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                              NAMES
18a246b46399        swarm               "/swarm manage -H 0.0"   3 minutes ago       Up 3 minutes        2375/tcp, 0.0.0.0:3375->3375/tcp   node-m

[root@node1 opt]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
df43c2cbfee0        swarm               "/swarm join --addr=1"   2 minutes ago       Up 2 minutes        2375/tcp            node-1

[root@node2 opt]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
a9b48c6d7be2        swarm               "/swarm join --addr=1"   3 minutes ago       Up 3 minutes        2375/tcp            node-2

其他信息:

swarm version: 1.2.6

docker version: 1.12.6

为什么会出现这样的问题呢"Cannot connect to the Docker daemon at tcp://192.168.5.x:2375. Is the docker daemon running?"