跨节点

Question

使用网络“my-network”

在群组中设置两个泊坞窗虚拟机

docker-machine create --driver virtualbox --virtualbox-hostonly-cidr "10.10.11.1/24" --virtualbox-host-dns-resolver node-1
docker-machine create --driver virtualbox --virtualbox-hostonly-cidr "10.10.12.1/24" --virtualbox-host-dns-resolver node-2

ManagerIP=`docker-machine ip node-1`

docker-machine ssh node-1 docker swarm init --advertise-addr ${ManagerIP}

WorkerToken=`docker-machine ssh node-1 docker swarm join-token worker | grep token | awk '{ print $5 }'`

docker-machine ssh node-2 "docker swarm join --token ${WorkerToken} ${ManagerIP}:2377 --advertise-addr $(docker-machine ip node-2)"

docker-machine ssh node-1 "docker network create --attachable --driver overlay --subnet 10.0.9.0/24 my-network"

使用复制服务创建docker-compose文件（test.docker-compose.yml）

version: '3.1'

networks:
  my-network:
    external: true

services:
  test:
    image: busybox
    networks:
      - my-network
    command: "tail -f /dev/null"
    deploy:
      replicas: 2

部署为堆栈“teststack”

docker stack deploy --compose-file test.docker-compose.yml teststack

检查

eval $(docker-machine env node-1)

docker node ls
    ID                            HOSTNAME            STATUS              AVAILABILITY        MANAGER STATUS
    k0ynsbcldrws857ioes7lvj9l *   node-1              Ready               Active              Leader
    kdbpaopbh2arzvcp0jwygw1lm     node-2              Ready               Active              

docker stack ps teststack
    ID                  NAME                IMAGE               NODE                DESIRED STATE       CURRENT STATE                ERROR               PORTS
    ydfu68b163bu        teststack_test.1    busybox:latest      node-2              Running             Running about a minute ago                       
    cl0glr0emk9r        teststack_test.2    busybox:latest      node-1              Running             Running about a minute ago

docker ps
    CONTAINER ID        IMAGE               COMMAND               CREATED             STATUS              PORTS               NAMES
    7ca90fbfb8b3        busybox:latest      "tail -f /dev/null"   3 minutes ago       Up 3 minutes                            teststack_test.2.cl0glr0emk9rejuf25eync1cz

eval $(docker-machine env node-2)

docker ps
    CONTAINER ID        IMAGE               COMMAND               CREATED             STATUS              PORTS               NAMES
    701f527d8327        busybox:latest      "tail -f /dev/null"   4 minutes ago       Up 4 minutes                            teststack_test.1.ydfu68b163bu1h1lq0107l6f8

我希望能够从另一个实例访问该服务的一个实例/容器。让我们说我们想从node-2上的容器teststack_test.1.ydfu68b163bu1h1lq0107l6f8访问node-1上的容器teststack_test.2.cl0glr0emk9rejuf25eync1cz

docker exec -it teststack_test.1.ydfu68b163bu1h1lq0107l6f8 /bin/sh

ping teststack_test.2.cl0glr0emk9rejuf25eync1cz
    PING teststack_test.2.cl0glr0emk9rejuf25eync1cz (10.0.9.6): 56 data bytes
    ^C
    --- teststack_test.2.cl0glr0emk9rejuf25eync1cz ping statistics ---
    12 packets transmitted, 0 packets received, 100% packet loss

它可以使用类似名称

访问“本身”

ping teststack_test.1.ydfu68b163bu1h1lq0107l6f8
    PING teststack_test.1.ydfu68b163bu1h1lq0107l6f8 (10.0.9.5): 56 data bytes
    64 bytes from 10.0.9.5: seq=0 ttl=64 time=0.046 ms
    64 bytes from 10.0.9.5: seq=1 ttl=64 time=0.083 ms
    ^C
    --- teststack_test.1.ydfu68b163bu1h1lq0107l6f8 ping statistics ---
    2 packets transmitted, 2 packets received, 0% packet loss
    round-trip min/avg/max = 0.046/0.064/0.083 ms

请注意，它确实为内部网络上的teststack_test.2.cl0glr0emk9rejuf25eync1cz获取了正确的IP（10.0.9.6）

eval $(docker-machine env node-1)
docker exec -it teststack_test.2.cl0glr0emk9rejuf25eync1cz /bin/sh
ifconfig
    eth0      Link encap:Ethernet  HWaddr 02:42:0A:00:09:06  
              inet addr:10.0.9.6  Bcast:10.0.9.255  Mask:255.255.255.0
              UP BROADCAST RUNNING MULTICAST  MTU:1450  Metric:1
              RX packets:13 errors:0 dropped:0 overruns:0 frame:0
              TX packets:13 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:1218 (1.1 KiB)  TX bytes:1218 (1.1 KiB)
    ...

如何从node-2上的容器teststack_test.1.ydfu68b163bu1h1lq0107l6f8访问node-1上的teststack_test.2.cl0glr0emk9rejuf25eync1cz？反之亦然

有没有办法可以访问teststack_test的1号实例，即使实例移动到另一个节点也能正常工作（我希望这个名称不再是teststack_test.1.ydfu68b163bu1h1lq0107l6f8，而是teststack_test.1。＆lt; ;一些，别的＆GT;）？ ping teststack_test.1似乎不起作用。