我尝试使用docker-py(版本1.3.1)启动Docker容器。我想将容器内部端口映射到其他端口,但无法正确公开它们。
我这样做是这样的:
def start_container(client, host_config, image_tagged_name, command): print ("create_host_config", host_config.binds, host_config.port_bindings) the_host_config = create_host_config(binds = host_config.binds, port_bindings = host_config.port_bindings); the_ports = host_config.port_bindings.values(); print ("create_container", image_tagged_name, command, the_ports, the_host_config) cont_id = client.create_container(image=image_tagged_name, command=command, ports=the_ports, host_config=the_host_config)["Id"]
在当前情况下,输出如下:
create_host_config ['/dbfiles/test:/opt/db'] {3001: 3000, 2425: 2424, 2481: 2480} create_container test:test ./initdb.sh [3000, 2424, 2480] {'Binds': ['/dbfiles/test:/opt/db'], 'PortBindings': {'3001/tcp': [{'HostPort': '3000', 'HostIp': ''}], '2425/tcp': [{'HostPort': '2424', 'HostIp': ''}], '2481/tcp': [{'HostPort': '2480', 'HostIp': ''}]}}
docker ps告诉我:
$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 169ad3ae0f63 test:test "./initdb.sh" 5 minutes ago Up 5 minutes 2424/tcp, 2480/tcp, 3000/tcp silly_pasteur
但是如果我给它映射3000-> 3000,2424-> 2424和2480-> 2480
$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES cba483673bdd test:test "./initdb.sh" 53 minutes ago Up 5 minutes 0.0.0.0:2424->2424/tcp, 0.0.0.0:2480->2480/tcp, 0.0.0.0:3000->3000/tcp stupefied_ptolemy
关键是从命令行我可以使用正确的端口映射启动容器。那是
docker运行-d -p 3001:3000 -p 2425:2424 -p 2481:2480 -v / dbfiles / test:/ opt / db localhost:5000 / test:test /initdb.sh
给出期望的结果。
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 7c1580e0ace9 localhost:5000/test:test "/initdb.sh" 8 seconds ago Up 6 seconds 0.0.0.0:2425->2424/tcp, 0.0.0.0:2481->2480/tcp, 0.0.0.0:3001->3000/tcp backstabbing_brahmagupta
但是,使用docker-py,我无法弄清楚如何将端口映射到不同的端口号。我想念什么?
问题是docker- py将容器端口放在其主机配置中的第一位,而docker客户端将其放在第二位。不过,更有趣的是我终于发现了它。诀窍是先安装socat,然后再安装
$ socat -v UNIX-LISTEN:/tmp/debug, fork UNIX-CONNECT:/var/run/docker.sock $ export DOCKER_HOST=unix:///tmp/debug
这样可以方便地查看docker客户端以及docker-py客户端的流量。
我在里面搜索PortBindings字符串。对于原始客户,这给了我:
"PortBindings": { "2424/tcp": [{"HostIp":"","HostPort":"2425"}], "2480/tcp": [{"HostIp":"","HostPort":"2481"}], "3000/tcp": [{"HostIp":"","HostPort":"3001"}] }
虽然我的代码给了我
"PortBindings": { "2425/tcp": [{"HostPort": "2424", "HostIp": ""}], "2481/tcp": [{"HostPort": "2480", "HostIp": ""}], "3001/tcp": [{"HostPort": "3000", "HostIp": ""}] },
这使一切显而易见。问题不在于未公开端口而是端口的错误顺序。