容器基础(八): 使用docker swarm部署程序

环境

基于上一节的env/server:v0.1, env/worker:v0.1镜像, 在基于debian8.2的两台机器上测试部署docker swarm.

docker service部署

➜  ~  docker service create --replicas  --name server -e APP_PORT= --network docker-net --publish : env/server:v0.
image env/server:v0. could not be accessed on a registry to record
its digest. Each node will access env/server:v0. independently,
possibly leading to different nodes running different
versions of the image.

pzyx887jb112isgkyorarvt7t
overall progress:  out of  tasks
/: running   [==================================================>]
verify: Service converged
➜  ~
➜  ~  docker service create --replicas  --name worker -e APP_DOMAIN=server -e APP_PORT= --network docker-net env/worker:v0.
image env/worker:v0. could not be accessed on a registry to record
its digest. Each node will access env/worker:v0. independently,
possibly leading to different nodes running different
versions of the image.

wavv2ie7ad9je6s33q82f3skv
overall progress:  out of  tasks
/: running   [==================================================>]
/: running   [==================================================>]
verify: Service converged
➜  ~  docker service ls
ID                  NAME                MODE                REPLICAS            IMAGE               PORTS
pzyx887jb112        server              replicated          /                 env/server:v0.     *:->/tcp
wavv2ie7ad9j        worker              replicated          /                 env/worker:v0.
➜  ~  docker service ps worker
ID                  NAME                IMAGE               NODE                DESIRED STATE       CURRENT STATE            ERROR               PORTS
hyjcg25ymfvx        worker.            env/worker:v0.     debian-vm           Running             Running  seconds ago
zpx2oq4q0dhu        worker.            env/worker:v0.     debian              Running             Running  seconds ago                        

 ➜  ~  docker ps
 CONTAINER ID        IMAGE               COMMAND              CREATED             STATUS              PORTS               NAMES
 a9b1931acf12        env/worker:v0.     "python worker.py"    minutes ago       Up  minutes                            worker..zpx2oq4q0dhuqgvtkt0mm8dyt
 994e4779c252        env/server:v0.     "python server.py"    minutes ago       Up  minutes                            server..v5mu7wa8tfswayzwjh3u1qtpk
 ➜  ~  docker exec 994e4779c252 cat /env/server/log/server.log
 -- :: [INFO]  Waiting for connection...
 -- :: [INFO]  ('10.0.0.5', ) connected
 -- :: [INFO]  ('10.0.0.4', ) connected
 ➜  ~  docker exec a9b1931acf12 cat /env/worker/log/worker.log
 -- :: [INFO]  [+] ('10.0.0.2', ) connected
 -- :: [INFO]  [recv] hello, docker!
 ➜  ~  docker exec a9b1931acf12 ping -c  server
 PING server (10.0.0.2) () bytes of data.
  bytes from 10.0.0.2: icmp_seq= ttl= time=0.117 ms
  bytes from 10.0.0.2: icmp_seq= ttl= time=0.205 ms

 --- server ping statistics ---
  packets transmitted,  received, % packet loss, time 1000ms
 rtt min/avg/max/mdev = 0.117/0.161/0.205/0.044 ms

manager node上测试服务可用和可发现

 root@debian-vm:~# docker ps
 CONTAINER ID        IMAGE               COMMAND              CREATED              STATUS              PORTS               NAMES
 94b6e94a4f4c        env/worker:v0.     "python worker.py"   About a minute ago   Up  seconds                           worker..hyjcg25ymfvx2u6ghy3ng7g1y
 root@debian-vm:~# docker exec 94b6e94a4f4c cat /env/worker/log/worker.log
 -- :: [INFO]  [+] ('10.0.0.2', ) connected
 -- :: [INFO]  [recv] hello, docker!
 root@debian-vm:~# docker exec 94b6e94a4f4c ping -c  server
 PING server (10.0.0.2) () bytes of data.
  bytes from 10.0.0.2: icmp_seq= ttl= time=0.058 ms
  bytes from 10.0.0.2: icmp_seq= ttl= time=0.057 ms

 --- server ping statistics ---
  packets transmitted,  received, % packet loss, time 1002ms
 rtt min/avg/max/mdev = 0.057/0.057/0.058/0.007 ms
 root@debian-vm:~# 

worker node上测试服务可用和可发现

# 从worker node上验证publish端口
root@debian-vm:/env/worker# export APP_PORT=
root@debian-vm:/env/worker# export APP_DOMAIN=192.168.2.118
root@debian-vm:/env/worker# python worker.py
[+] ('192.168.2.118', ) connected
[+][recv] hello, docker!
^C
[-] signal() received, exit!
root@debian-vm:/env/worker#

# 从manager node上验证publish端口
➜  worker  export APP_PORT=
➜  worker  export APP_DOMAIN=192.168.2.118
➜  worker  python worker.py
[+] ('192.168.2.118', ) connected
[+][recv] hello, docker!
^C
[-] signal() received, exit!
➜  worker  docker exec 994e4779c252 cat /env/server/log/server.log
-- :: [INFO]  Waiting for connection...
-- :: [INFO]  ('10.0.0.5', ) connected
-- :: [INFO]  ('10.0.0.4', ) connected
-- :: [INFO]  ('10.255.0.2', ) connected
-- :: [INFO]  ('10.255.0.2', ) closed
-- :: [INFO]  ('10.255.0.2', ) connected
-- :: [INFO]  ('10.255.0.2', ) closed
➜  worker

验证服务的publish端口

docker stack部署

#docker-compose.yml

version: ""
services:
  server:
    image: env/server:v0.
    build:
      context: /app/env/server
      dockerfile: Dockerfile
    labels:
      description: "tcp server test script"
    ports:
      - :${APP_PORT-}
      - ${APP_PORT-}:${APP_PORT-}
    restart: always
    environment:
      - APP_PORT=${APP_PORT-}
    networks:
      - overlay
    deploy:
      replicas: 

  worker:
    image: env/worker:v0.
    build: /app/env/worker
    labels:
      description: "tcp client test script"
    links:
      - server
    environment:
      - APP_PORT=${APP_PORT-}
      - APP_DOMAIN=server
    networks:
      - overlay
    depends_on:
      - server
    deploy:
      replicas:
      restart_policy:
        condition: on-failure

  worker_test:
    image: env/worker_test:v0.
    networks:
      - overlay
    deploy:
      replicas: 

networks:
  overlay:

➜  /env  echo $APP_PORT

➜  /env  docker stack deploy -c docker-compose.yml  env
Ignoring unsupported options: build, links, restart

Creating network env_overlay
Creating service env_worker_test
Creating service env_server
Creating service env_worker
➜  /env  docker service ls
ID                  NAME                MODE                REPLICAS            IMAGE                  PORTS
lwl5gpaseyz5        env_server          replicated          /                 env/server:v0.        *:->/tcp, *:->/tcp
0ywtuy79e5af        env_worker          replicated          /                 env/worker:v0.
a2malzyjs8a8        env_worker_test     replicated          /                 env/worker_test:v0.
➜  /env  docker ps
CONTAINER ID        IMAGE                  COMMAND              CREATED              STATUS              PORTS               NAMES
6534e1ab7a0f        env/worker:v0.        "python worker.py"   About a minute ago   Up About a minute                       env_worker..o8oo0c2do3xi17bb2y1jyxyvt
a6f05a1180fa        env/worker_test:v0.   "python worker.py"   About a minute ago   Up About a minute                       env_worker_test..xyriek6uv0jt5u8grfh2r2nip
dd178c531cab        env/worker_test:v0.   "python worker.py"   About a minute ago   Up About a minute                       env_worker_test..e5akyik75zru3a3vm7t0uow42
➜  /env  docker exec 6534e1ab7a0f cat /env/worker/log/worker.log
-- :: [INFO]  [+] ('10.0.3.8', ) connected
-- :: [INFO]  [recv] hello, docker!

 root@debian-vm:/# docker ps
 CONTAINER ID        IMAGE                  COMMAND              CREATED             STATUS              PORTS               NAMES
 54816f125b5d        env/worker:v0.        "python worker.py"    minutes ago       Up  minutes                            env_worker..583qka4f0we1tr8gzfbfwd8xq
 b148b68c60ac        env/worker:v0.        "python worker.py"    minutes ago       Up  minutes                            env_worker..pajhjlgfcfpkcvtgbl4pd9iec
 4501dddabc12        env/server:v0.        "python server.py"    minutes ago       Up  minutes                            env_server..r8rffhrzds0p5qreiz3zskglt
 423f9f7fe5bf        env/worker_test:v0.   "python worker.py"    minutes ago       Up  minutes                            env_worker_test..yafiu0eg5bmmv47do4dwtbcdm
 root@debian-vm:/# docker exec 4501dddabc12 cat /env/server/log/server.log
 -- :: [INFO]  Waiting for connection...
 -- :: [INFO]  ('10.0.3.3', ) connected
 -- :: [INFO]  ('10.0.3.3', ) connected
 -- :: [INFO]  ('10.0.3.2', ) connected
 root@debian-vm:/# 

manager node验证连接建立成功

# worker node启动客户端
➜  worker  export APP_PORT=
➜  worker  export APP_DOMAIN=192.168.2.118
➜  worker  python worker.py
[+] ('192.168.2.118', ) connected
[+][recv] hello, docker!
^C
[-] signal() received, exit!
➜  worker 

# manager node查看日志, 验证连接成功
root@debian-vm:/# docker exec 4501dddabc12 cat /env/server/log/server.log
-- :: [INFO]  Waiting for connection...
-- :: [INFO]  ('10.0.3.3', ) connected
-- :: [INFO]  ('10.0.3.3', ) connected
-- :: [INFO]  ('10.0.3.2', ) connected
-- :: [INFO]  ('10.255.0.2', ) connected
-- :: [INFO]  ('10.255.0.2', ) closed
root@debian-vm:/# 

验证服务的publish端口