Write out a json file containing container startup info and create tool to use it.
This adds a bit to the post.yaml for docker to write out a json file containing all the information on how we are start docker containers (thanks Dan!). I've then written a script that parses this that can be used to execute docker run commands in various ways for debugging purposes. Change-Id: I36d66b42d1ac5030db8841820d4fc512a71d1285 Co-Authored-by: Dan Prince <dprince@redhat.com>
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docker/docker-toool
Executable file
189
docker/docker-toool
Executable file
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#!/usr/bin/env python
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import argparse
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import os
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import shutil
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import sys
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import json
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docker_cmd = '/bin/docker'
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# Tool to start docker containers as configured via
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# tripleo-heat-templates.
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#
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# This tool reads data from a json file generated from heat when the
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# TripleO stack is run. All the configuration data used to start the
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# containerized services is in this file.
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#
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# By default this tool lists all the containers that are started and
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# their start order.
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#
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# If you wish to see the command line used to start a given container,
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# specify it by name using the --container argument. --run can then be
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# used with this to actually execute docker to run the container.\n
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#
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# Other options listed allow you to modify this command line for
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# debugging purposes. For example:
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#
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# docker-toool -c swift-proxy -r -e /bin/bash -u root -i -n test
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#
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# will run the swift proxy container as user root, executing /bin/bash,
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#
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# named 'test', and will run interactively (eg -ti).
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def parse_opts(argv):
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parser = argparse.ArgumentParser("Tool to start docker containers via "
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"TripleO configurations")
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parser.add_argument('-f', '--config',
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help="""File to use as docker startup configuration data.""",
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default='/var/lib/docker-container-startup-configs.json')
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parser.add_argument('-r', '--run',
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action='store_true',
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help="""Run the container as specified with --container.""",
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default=False)
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parser.add_argument('-e', '--command',
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help="""Override the command used to run the container.""",
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default='')
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parser.add_argument('-c', '--container',
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help="""Specify a container to run or show the command for.""",
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default='')
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parser.add_argument('-u', '--user',
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help="""User to run container as.""",
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default='')
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parser.add_argument('-n', '--name',
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help="""Name of container.""",
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default='')
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parser.add_argument('-i', '--interactive',
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action='store_true',
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help="""Start docker container interactively (-ti).""",
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default=False)
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opts = parser.parse_args(argv[1:])
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return opts
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def docker_arg_map(key, value):
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value = str(value).encode('ascii', 'ignore')
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return {
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'environment': "--env=%s" % value,
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# 'image': value,
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'net': "--net=%s" % value,
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'pid': "--pid=%s" % value,
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'privileged': "--privileged=%s" % value.lower(),
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#'restart': "--restart=%s" % "false",
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'user': "--user=%s" % value,
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'volumes': "--volume=%s" % value,
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'volumes_from': "--volumes-from=%s" % value,
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}.get(key, None)
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def run_docker_container(opts, container_name):
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container_found = False
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with open(opts.config) as f:
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json_data = json.load(f)
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for step in (json_data or []):
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if step is None:
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continue
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for container in (json_data[step] or []):
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if container == container_name:
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print('container found: %s' % container)
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container_found = True
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# A few positional arguments:
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command = ''
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image = ''
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cmd = [
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docker_cmd,
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'run',
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'--name',
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opts.name or container
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]
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for container_data in (json_data[step][container] or []):
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if container_data == "environment":
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for env in (json_data[step][container][container_data] or []):
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arg = docker_arg_map("environment", env)
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if arg:
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cmd.append(arg)
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elif container_data == "volumes":
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for volume in (json_data[step][container][container_data] or []):
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arg = docker_arg_map("volumes", volume)
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if arg:
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cmd.append(arg)
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elif container_data == "volumes_from":
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for volume in (json_data[step][container][container_data] or []):
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arg = docker_arg_map("volumes_from", volume)
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if arg:
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cmd.append(arg)
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elif container_data == 'command':
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command = json_data[step][container][container_data]
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elif container_data == 'image':
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image = json_data[step][container][container_data]
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else:
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# Only add a restart if we're not interactive
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if container_data == 'restart':
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if opts.interactive:
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continue
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if container_data == 'user':
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if opts.user:
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continue
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arg = docker_arg_map(container_data,
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json_data[step][container][container_data])
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if arg:
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cmd.append(arg)
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if opts.user:
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cmd.append('--user')
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cmd.append(opts.user)
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if opts.interactive:
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cmd.append('-ti')
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# May as well remove it when we're done too
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cmd.append('--rm')
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cmd.append(image)
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if opts.command:
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cmd.append(opts.command)
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elif command:
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cmd.extend(command)
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print ' '.join(cmd)
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if opts.run:
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os.execl(docker_cmd, *cmd)
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if not container_found:
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print("Container '%s' not found!" % container_name)
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def list_docker_containers(opts):
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print opts
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with open(opts.config) as f:
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json_data = json.load(f)
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for step in (json_data or []):
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if step is None:
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continue
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print step
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for container in (json_data[step] or []):
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print('\tcontainer: %s' % container)
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for container_data in (json_data[step][container] or []):
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#print('\t\tcontainer_data: %s' % container_data)
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if container_data == "start_order":
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print('\t\tstart_order: %s' % json_data[step][container][container_data])
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opts = parse_opts(sys.argv)
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if opts.container:
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run_docker_container(opts, opts.container)
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else:
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list_docker_containers(opts)
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@ -187,6 +187,24 @@ resources:
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docker_config: {get_param: [role_data, {{role.name}}, docker_config]}
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docker_image: {get_param: [role_data, {{role.name}}, docker_image]}
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# Here we are dumping all the docker container startup configuration data
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# so that we can have access to how they are started outside of heat
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# and docker-cmd. This lets us create command line tools to start and
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# test these containers.
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{{role.name}}DockerConfigJsonStartupData:
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type: OS::Heat::StructuredConfig
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properties:
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group: json-file
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config:
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/var/lib/docker-container-startup-configs.json:
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{get_attr: [{{role.name}}DockerConfig, value]}
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{{role.name}}DockerConfigJsonStartupDataDeployment:
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type: OS::Heat::SoftwareDeploymentGroup
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properties:
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config: {get_resource: {{role.name}}DockerConfigJsonStartupData}
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servers: {get_param: [servers, {{role.name}}]}
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{{role.name}}KollaJsonConfig:
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type: OS::Heat::StructuredConfig
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properties:
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