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Docker supports links and port binding. Added docker_image module

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Pavel Antonov 2014-01-22 16:04:19 +04:00 committed by Michael DeHaan
parent 375c346a6d
commit ae99e8860e
2 changed files with 376 additions and 11 deletions
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72
cloud/docker
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@ -1,6 +1,7 @@
#!/usr/bin/python
# (c) 2013, Cove Schneider
# (c) 2014, Pavel Antonov <antonov@adwz.ru>
#
# This file is part of Ansible,
#
@ -45,12 +46,24 @@ options:
required: false
default: null
aliases: []
name:
description:
- Set name for container (used to find single container or to provide links)
required: false
default: null
aliases: []
ports:
description:
- Set private to public port mapping specification (e.g. ports=22,80 or ports=:8080 maps 8080 directly to host)
required: false
default: null
aliases: []
links:
description:
- Add links to another container (e.g. links=redis,postgresql:db)
required: false
default: null
aliases: []
volumes:
description:
- Set volume(s) to mount on the container
@ -232,7 +245,9 @@ class DockerManager:
if self.module.params.get('volumes'):
self.binds = {}
self.volumes = {}
vols = self.module.params.get('volumes').split(" ")
vols = self.module.params.get('volumes')
if not isinstance(vols, list):
vols = vols.split(" ")
for vol in vols:
parts = vol.split(":")
# host mount (e.g. /mnt:/tmp, bind mounts host's /tmp to /mnt in the container)
@ -253,11 +268,37 @@ class DockerManager:
self.ports = None
if self.module.params.get('ports'):
self.ports = self.module.params.get('ports').split(",")
ports = self.module.params.get('ports')
self.ports = ports if isinstance(ports, list) else ports.split(",")
self.port_bindings = None
if self.module.params.get('port_bindings'):
self.port_bindings = {}
bindings = self.module.params.get('port_bindings')
bindings = bindings if isinstance(bindings, list) else bindings.split(",")
for binding in bindings:
parts = binding.split(":")
if len(parts) == 3:
self.port_bindings[parts[0]] = (parts[1], parts[2])
elif len(parts) == 2:
self.port_bindings[parts[0]] = parts[1]
else:
self.port_bindings[parts[0]] = None
self.links = None
if self.module.params.get('links'):
self.links = {}
links = self.module.params.get('links')
if not isinstance(links, list):
links = links.split(",")
for link in links:
parts = link.split(":")
self.links[parts[0]] = parts[1] if len(parts) == 2 else parts[0]
self.env = None
if self.module.params.get('env'):
self.env = dict(map(lambda x: x.split("="), self.module.params.get('env').split(",")))
env = self.module.params.get('env')
self.env = dict(map(lambda x: x.split("="), env if isinstance(env, list) else env.split(",")))
# connect to docker server
docker_url = urlparse(module.params.get('docker_url'))
@ -301,22 +342,27 @@ class DockerManager:
def get_deployed_containers(self):
# determine which images/commands are running already
containers = self.client.containers()
image = self.module.params.get('image')
command = self.module.params.get('command')
containers = self.client.containers(all=True)
image = self.module.params.get('image')
command = self.module.params.get('command')
if command:
command = command.strip()
deployed = []
name = self.module.params.get('name')
if name and not name.startswith('/'):
name = '/' + name
deployed = []
# if we weren't given a tag with the image, we need to only compare on the image name, as that
# docker will give us back the full image name including a tag in the container list if one exists.
image, tag = self.get_split_image_tag(image)
for i in containers:
running_image, running_tag = self.get_split_image_tag(i['Image'])
running_command = i['Command'].strip()
if running_image == image and (not tag or tag == running_tag) and (not command or running_command == command):
if (name and name in i['Names']) or \
(not name and running_image == image and (not tag or tag == running_tag) and
(not command or running_command == command)):
details = self.client.inspect_container(i['Id'])
details = _docker_id_quirk(details)
deployed.append(details)
@ -334,6 +380,7 @@ class DockerManager:
def create_containers(self, count=1):
params = {'image': self.module.params.get('image'),
'command': self.module.params.get('command'),
'name': self.module.params.get('name'),
'ports': self.ports,
'volumes': self.volumes,
'volumes_from': self.module.params.get('volumes_from'),
@ -365,7 +412,8 @@ class DockerManager:
def start_containers(self, containers):
for i in containers:
self.client.start(i['Id'], lxc_conf=self.lxc_conf, binds=self.binds)
self.client.start(i['Id'], lxc_conf=self.lxc_conf, binds=self.binds,
port_bindings = self.port_bindings, links=self.links)
self.increment_counter('started')
def stop_containers(self, containers):
@ -396,7 +444,10 @@ def main():
count = dict(default=1),
image = dict(required=True),
command = dict(required=False, default=None),
name = dict(required=False, default=None),
ports = dict(required=False, default=None),
port_bindings = dict(required=False, default=None),
links = dict(required=False, default=None),
volumes = dict(default=None),
volumes_from = dict(default=None),
memory_limit = dict(default=0),
@ -434,7 +485,6 @@ def main():
# start/stop containers
if state == "present":
# start more containers if we don't have enough
if delta > 0:
containers = manager.create_containers(delta)

315
cloud/docker_image Normal file
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@ -0,0 +1,315 @@
#!/usr/bin/env python
#
# (c) 2014, Pavel Antonov <antonov@adwz.ru>
#
# This module is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This software is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this software. If not, see <http://www.gnu.org/licenses/>.
######################################################################
DOCUMENTATION = '''
---
module: docker
version_added: "1.4"
short_description: manage docker containers
description:
- Manage the life cycle of docker containers.
options:
count:
description:
- Set number of containers to run
required: False
default: 1
aliases: []
image:
description:
- Set container image to use
required: true
default: null
aliases: []
command:
description:
- Set command to run in a container on startup
required: false
default: null
aliases: []
ports:
description:
- Set private to public port mapping specification (e.g. ports=22,80 or ports=:8080 maps 8080 directly to host)
required: false
default: null
aliases: []
volumes:
description:
- Set volume(s) to mount on the container
required: false
default: null
aliases: []
volumes_from:
description:
- Set shared volume(s) from another container
required: false
default: null
aliases: []
memory_limit:
description:
- Set RAM allocated to container
required: false
default: null
aliases: []
default: 256MB
docker_url:
description:
- URL of docker host to issue commands to
required: false
default: unix://var/run/docker.sock
aliases: []
username:
description:
- Set remote API username
required: false
default: null
aliases: []
password:
description:
- Set remote API password
required: false
default: null
aliases: []
hostname:
description:
- Set container hostname
required: false
default: null
aliases: []
env:
description:
- Set environment variables (e.g. env="PASSWORD=sEcRe7,WORKERS=4")
required: false
default: null
aliases: []
dns:
description:
- Set custom DNS servers for the container
required: false
default: null
aliases: []
detach:
description:
- Enable detached mode on start up, leaves container running in background
required: false
default: true
aliases: []
state:
description:
- Set the state of the container
required: false
default: present
choices: [ "present", "stopped", "absent", "killed", "restarted" ]
aliases: []
privileged:
description:
- Set whether the container should run in privileged mode
required: false
default: false
aliases: []
lxc_conf:
description:
- LXC config parameters, e.g. lxc.aa_profile:unconfined
required: false
default:
aliases: []
author: Cove Schneider
requirements: [ "docker-py" ]
notes:
- Currently supports Docker version <= 0.6.4 only.
'''
EXAMPLES = '''
Start one docker container running tomcat in each host of the web group and bind tomcat's listening port to 8080
on the host:
- hosts: web
sudo: yes
tasks:
- name: run tomcat servers
docker: image=centos command="service tomcat6 start" ports=:8080
The tomcat server's port is NAT'ed to a dynamic port on the host, but you can determine which port the server was
mapped to using docker_containers:
- hosts: web
sudo: yes
tasks:
- name: run tomcat servers
docker: image=centos command="service tomcat6 start" ports=8080 count=5
- name: Display IP address and port mappings for containers
debug: msg={{inventory_hostname}}:{{item.NetworkSettings.Ports['8080/tcp'][0].HostPort}}
with_items: docker_containers
Just as in the previous example, but iterates over the list of docker containers with a sequence:
- hosts: web
sudo: yes
vars:
start_containers_count: 5
tasks:
- name: run tomcat servers
docker: image=centos command="service tomcat6 start" ports=8080 count={{start_containers_count}}
- name: Display IP address and port mappings for containers
debug: msg={{inventory_hostname}}:{{docker_containers[{{item}}].NetworkSettings.Ports['8080/tcp'][0].HostPort}}"
with_sequence: start=0 end={{start_containers_count - 1}}
Stop, remove all of the running tomcat containers and list the exit code from the stopped containers:
- hosts: web
sudo: yes
tasks:
- name: stop tomcat servers
docker: image=centos command="service tomcat6 start" state=absent
- name: Display return codes from stopped containers
debug: msg="Returned {{inventory_hostname}}:{{item}}"
with_items: docker_containers
'''
try:
import sys
import docker.client
from requests.exceptions import *
from urlparse import urlparse
except ImportError, e:
print "failed=True msg='failed to import python module: %s'" % e
sys.exit(1)
def _human_to_bytes(number):
suffixes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB']
if isinstance(number, int):
return number
if number[-1] == suffixes[0] and number[-2].isdigit():
return number[:-1]
i = 1
for each in suffixes[1:]:
if number[-len(each):] == suffixes[i]:
return int(number[:-len(each)]) * (1024 ** i)
i = i + 1
print "failed=True msg='Could not convert %s to integer'" % (number)
sys.exit(1)
def _ansible_facts(container_list):
return {"docker_containers": container_list}
def _docker_id_quirk(inspect):
# XXX: some quirk in docker
if 'ID' in inspect:
inspect['Id'] = inspect['ID']
del inspect['ID']
return inspect
class DockerImageManager:
counters = {'created':0, 'started':0, 'stopped':0, 'killed':0, 'removed':0, 'restarted':0, 'pull':0}
def __init__(self, module):
self.module = module
self.path = self.module.params.get('path')
self.name = self.module.params.get('name')
self.tag = self.module.params.get('tag')
self.nocache = self.module.params.get('nocache')
docker_url = urlparse(module.params.get('docker_url'))
self.client = docker.Client(base_url=docker_url.geturl(), timeout=module.params.get('timeout'))
self.changed = False
def build(self):
res = self.client.build(self.path, tag=":".join([self.name, self.tag]), nocache=self.nocache, rm=True)
self.changed = True
return res
def has_changed(self):
return self.changed
def get_images(self):
filtered_images = []
images = self.client.images()
for i in images:
if (not self.name or self.name == i['Repository']) and (not self.tag or self.tag == i['Tag']):
filtered_images.append(i)
return filtered_images
def remove_images(self):
images = self.get_images()
for i in images:
try:
self.client.remove_image(i['Id'])
self.changed = True
except docker.APIError as e:
# image can be removed by docker if not used
pass
def main():
module = AnsibleModule(
argument_spec = dict(
path = dict(required=False, default=None),
name = dict(required=True),
#id = dict(required=False, default=None),
tag = dict(required=False, default=""),
nocache = dict(default=False, type='bool'),
state = dict(default='present', choices=['absent', 'present', 'build']),
docker_url = dict(default='unix://var/run/docker.sock'),
timeout = dict(default=600, type='int'),
)
)
try:
manager = DockerImageManager(module)
state = module.params.get('state')
failed = False
image_id = None
msg = ''
# build image if not exists
if state == "present":
images = manager.get_images()
if len(images) == 0:
image_id, msg = manager.build()
if image_id is None:
failed = True
# remove image or images
elif state == "absent":
manager.remove_images()
# build image
elif state == "build":
image_id, msg = manager.build()
if image_id is None:
failed = True
module.exit_json(failed=failed, changed=manager.has_changed(), msg=msg, image_id=image_id)
except docker.client.APIError as e:
module.exit_json(failed=True, changed=manager.has_changed(), msg="Docker API error: " + e.explanation)
except RequestException as e:
module.exit_json(failed=True, changed=manager.has_changed(), msg=repr(e))
# import module snippets
from ansible.module_utils.basic import *
main()