创建 Swarm 集群
有了发现服务作基础，接下来就要创建 Swarm 管理节点，我们创建两个节点(分别在不同的服务器上)来模拟高可用架构
创建第一个管理节点
代码语言：javascript复制[root@h104 ~]# docker run -d -p 4000:4000 swarm manage -H :4000 --replication --advertise 192.168.100.104:4000 consul://192.168.100.104:8500
a6a0adaa76a8771bf373998832deaa236d68513bb5f9de0b3051c49761447e1a
[root@h104 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a6a0adaa76a8 swarm "/swarm manage -H :40" 3 seconds ago Up 1 seconds 2375/tcp, 0.0.0.0:4000->4000/tcp sad_mestorf
3b12ab97b20f progrium/consul "/bin/start -server -" 16 hours ago Up 20 minutes 53/tcp, 53/udp, 8300-8302/tcp, 8400/tcp, 0.0.0.0:8500->8500/tcp, 8301-8302/udp consul
236348a3c9ff docker:5000/ci/jnkns-img2 "/bin/tini -- /usr/lo" 7 weeks ago Exited (143) 4 weeks ago jenkins01
[root@h104 ~]# 创建第二个管理节点
代码语言：javascript复制[root@docker ~]# docker run -d -p 4000:4000 swarm manage -H :4000 --replication --advertise 192.168.100.103:4000 consul://192.168.100.104:8500
de2669846044ea05851f69a643846d55b0f87c1f1d9abd29bcb90c71fa91bb0f
[root@docker ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
de2669846044 swarm "/swarm manage -H :40" 3 seconds ago Up 2 seconds 2375/tcp, 0.0.0.0:4000->4000/tcp high_wright
f616e3e353bc ci-infrastructure/jnkns-img "/bin/tini -- /usr/lo" 7 weeks ago Exited (0) 7 weeks ago jenkins01
71de3ba93794 registry:2 "/bin/registry /etc/d" 8 weeks ago Up 2 hours 0.0.0.0:5000->5000/tcp registry
[root@docker ~]# 代码语言：javascript复制Note: 涉及的网络端口有必要在防火墙上放行，打开方法
[root@docker ~]# firewall-cmd --list-all
public (default, active)
interfaces: eno16777736 eno33554960
sources:
services: dhcpv6-client ssh
ports: 3306/tcp 80/tcp 40000/tcp 8080/tcp
masquerade: no
forward-ports:
icmp-blocks:
rich rules:
[root@docker ~]# firewall-cmd --add-port 4000/tcp
success
[root@docker ~]# firewall-cmd --list-all
public (default, active)
interfaces: eno16777736 eno33554960
sources:
services: dhcpv6-client ssh
ports: 3306/tcp 80/tcp 40000/tcp 8080/tcp 4000/tcp
masquerade: no
forward-ports:
icmp-blocks:
rich rules:
[root@docker ~]#有必要打开的端口为 4000/tcp、2375/tcp、8500/tcp
PORT | Comment |
|---|---|
4000/tcp | 管理节点用来接受请求的端口 |
2375/tcp | Docker 引擎接受请求的端口 |
8500/tcp | 发现服务用来接受请求的端口 |
此时已经可以使用命令对管理节点发送请求
代码语言：javascript复制[root@h104 ~]# docker -H :4000 info
Containers: 0
Images: 0
Server Version: swarm/1.1.3
Role: replica
Primary: 192.168.100.103:4000
Strategy: spread
Filters: health, port, dependency, affinity, constraint
Nodes: 0
Kernel Version: 3.10.0-327.4.4.el7.x86_64
Operating System: linux
CPUs: 0
Total Memory: 0 B
Name: a6a0adaa76a8
[root@h104 ~]# docker -H :4000 ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@h104 ~]#
----------
[root@docker ~]# docker -H :4000 info
Containers: 0
Images: 0
Server Version: swarm/1.1.3
Role: primary
Strategy: spread
Filters: health, port, dependency, affinity, constraint
Nodes: 0
Kernel Version: 3.10.0-327.4.4.el7.x86_64
Operating System: linux
CPUs: 0
Total Memory: 0 B
Name: de2669846044
[root@docker ~]# docker -H :4000 ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@docker ~]#
