Created
March 15, 2019 11:47
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Add Port Binding to existing Docker Container.
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| """Create a new Port binding for an existing container. | |
| Must be run as root, as access to /var/lib/docker/containers | |
| requires root privileges. | |
| Source: | |
| https://mybrainimage.wordpress.com/2017/02/05/docker-change-port-mapping-for-an-existing-container/ | |
| ..admonition: WARNING! | |
| This will REPLACE any existing port binding of the given port and replace | |
| it with a binding to the given ports. | |
| """ | |
| import json | |
| import argparse | |
| import pathlib | |
| parser = argparse.ArgumentParser() | |
| parser.add_argument('Container Hash') | |
| parser.add_argument('host') | |
| parser.add_argument('container') | |
| parser.add_argument('type', '--type', choices=['tcp', 'udp'], default='tcp') | |
| args = parser.parse_args() | |
| config_path = pathlib.Path(f'/var/lib/docker/containers/{args.container_hash}/config.v2.json') | |
| with config_path.open('r') as fp: | |
| config = json.load(fp) | |
| host_port_and_type = f'{args.host}/{args.type}' | |
| container_port_and_type = f'{args.container}/{args.type}' | |
| config['ExposedPorts'][host_port_and_type] = {} | |
| ports = config['NetworkSettings']['Ports'] | |
| ports[args.container] = [{'HostIP': '', 'HostPort': args.host}] | |
| config['NetworkSettings']['Ports'] = ports | |
| with config_path.open('w+') as fp: | |
| json.dump(config, fp) | |
| host_config_path = pathlib.Path(f'/var/lib/docker/containers/{args.container_hash}/hostconfig.json') | |
| with host_config_path.open('r') as fp: | |
| host_config = json.load(fp) | |
| host_config['PortBindings'][container_port_and_type] = {'HostIP': '', 'HostPort': args.host} | |
| with host_config_path.open('w+') as fp: | |
| json.dump(host_config, fp) |
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Development / bugfixes etc will be added here:
https://github.com/nlsdfnbch/toolbox