Docker跨主机容器通信overlay实现过程详解

consul：kv类型的存储数据库（key:value）
docker01、02上：
vim /etc/docker/daemon.json
{
 "hosts":["tcp://0.0.0.0:2376","unix:///var/run/docker.sock"], 这行改了要修改自己的docker配置文件
 "cluster-store": "consul://10.0.0.11:8500",
 "cluster-advertise": "10.0.0.11:2376"   另外一台写自己的ip即可
}
vim /etc/docker/daemon.json
vim /usr/lib/systemd/system/docker.service
ExecStart=/usr/bin/dockerd --containerd=/run/containerd/containerd.sock 这行改成这样，两台的都要改
systemctl daemon-reload
systemctl restart docker

docker run -d -p 8500:8500 -h consul --name consul progrium/consul -server -bootstrap 这条命令在设置容器的主机名之后做
[root@docker1 centos_zabbix]# docker images
REPOSITORY              TAG         IMAGE ID      CREATED       SIZE
10.0.0.11:5000/kode         v2         6914fda5fd44    4 hours ago     502MB
kode                 v2         6914fda5fd44    4 hours ago     502MB
10.0.0.11:5000/centos6.9_nginx_ssh  v3         92b1087df3f5    13 hours ago    431MB
centos6.9_nginx_ssh         v3         92b1087df3f5    13 hours ago    431MB
centos6.9_nginx_ssh         v2         6307e23ee16d    13 hours ago    431MB
<none>                <none>       b94c822488f9    13 hours ago    431MB
centos6.9_nginx_ssh         v1         f01eeebf918a    13 hours ago    431MB
<none>                <none>       54167f1d659b    13 hours ago    431MB
<none>                <none>       71474e616504    13 hours ago    430MB
centos6.9_ssh            v2         03387f99f022    14 hours ago    307MB
<none>                <none>       82d0e9ce844b    14 hours ago    195MB
kode                 v1         c0f486ac58fe    15 hours ago    536MB
progrium/consul           latest       09ea64205e55    4 years ago     69.4MB  这里有了
[root@docker1 centos_zabbix]# docker ps -a
CONTAINER ID    IMAGE        COMMAND         CREATED    STATUS            PORTS                     NAMES
1016753ee64d    progrium/consul   "/bin/start -server …"  4 minutes ago    Exited (255) 3 minutes ago  53/tcp, 53/udp, 8300-8302/tcp, 8400/tcp, 8301-8302/udp, 0.0.0.0:8500->8500/tcp  consul

[root@docker1 shell]# docker network ls
NETWORK ID     NAME        DRIVER       SCOPE
e480a4fe5f4b    bridge       bridge       local
0a3cbfe2473f    host        host        local
4e5ccdc657e1    macvlan_1      macvlan       local
aab77f02a0b1    none        null        local
8ae111afded7    ol1         overlay       global

一台上：
docker run -it --network ol1 --name test01 centos6.9_ssh:v2 /bin/bash
另外一台上：
docker run -it --network ol1 --name test02 centos6.9_ssh:v2 /bin/bash
 
之后可以通过test01和test02之间联通