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main.py
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main.py
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"""Deploy and manage applications on the DCOS
Usage:
dcos marathon --config-schema
dcos marathon --info
dcos marathon about
dcos marathon app add [<app-resource>]
dcos marathon app list
dcos marathon app remove [--force] <app-id>
dcos marathon app restart [--force] <app-id>
dcos marathon app show [--app-version=<app-version>] <app-id>
dcos marathon app start [--force] <app-id> [<instances>]
dcos marathon app stop [--force] <app-id>
dcos marathon app update [--force] <app-id> [<properties>...]
dcos marathon app version list [--max-count=<max-count>] <app-id>
dcos marathon deployment list [<app-id>]
dcos marathon deployment rollback <deployment-id>
dcos marathon deployment stop <deployment-id>
dcos marathon deployment watch [--max-count=<max-count>]
[--interval=<interval>] <deployment-id>
dcos marathon task list [<app-id>]
dcos marathon task show <task-id>
dcos marathon group add [<group-resource>]
dcos marathon group list
dcos marathon group show [--group-version=<group-version>] <group-id>
dcos marathon group remove [--force] <group-id>
Options:
-h, --help Show this screen
--info Show a short description of this
subcommand
--version Show version
--force This flag disable checks in Marathon
during update operations
--app-version=<app-version> This flag specifies the application
version to use for the command. The
application version (<app-version>) can be
specified as an absolute value or as
relative value. Absolute version values
must be in ISO8601 date format. Relative
values must be specified as a negative
integer and they represent the version
from the currently deployed application
definition
--group-version=<group-version> This flag specifies the group version to
use for the command. The group version
(<group-version>) can be specified as an
absolute value or as relative value.
Absolute version values must be in ISO8601
date format. Relative values must be
specified as a negative integer and they
represent the version from the currently
deployed group definition
--config-schema Show the configuration schema for the
Marathon subcommand
--max-count=<max-count> Maximum number of entries to try to fetch
and return
--interval=<interval> Number of seconds to wait between actions
Positional arguments:
<app-id> The application id
<app-resource> The application resource; for a detailed
description see (https://mesosphere.github.io/
marathon/docs/rest-api.html#post-/v2/apps)
<deployment-id> The deployment id
<group-id> The group id
<group-resource> The group resource; for a detailed description
see (https://mesosphere.github.io/marathon/docs
/rest-api.html#post-/v2/groups)
<instances> The number of instances to start
<properties> Optional key-value pairs to be included in the
command. The separator between the key and
value must be the '=' character. E.g. cpus=2.0
<task-id> The task id
"""
import json
import sys
import time
import dcoscli
import docopt
import pkg_resources
from dcos import cmds, emitting, jsonitem, marathon, options, util
from dcos.errors import DCOSException
logger = util.get_logger(__name__)
emitter = emitting.FlatEmitter()
def main():
try:
return _main()
except DCOSException as e:
emitter.publish(e)
return 1
def _main():
util.configure_logger_from_environ()
args = docopt.docopt(
__doc__,
version='dcos-marathon version {}'.format(dcoscli.version))
return cmds.execute(_cmds(), args)
def _cmds():
"""
:returns: all the supported commands
:rtype: dcos.cmds.Command
"""
return [
cmds.Command(
hierarchy=['marathon', 'version', 'list'],
arg_keys=['<app-id>', '--max-count'],
function=_version_list),
cmds.Command(
hierarchy=['marathon', 'deployment', 'list'],
arg_keys=['<app-id>'],
function=_deployment_list),
cmds.Command(
hierarchy=['marathon', 'deployment', 'rollback'],
arg_keys=['<deployment-id>'],
function=_deployment_rollback),
cmds.Command(
hierarchy=['marathon', 'deployment', 'stop'],
arg_keys=['<deployment-id>'],
function=_deployment_stop),
cmds.Command(
hierarchy=['marathon', 'deployment', 'watch'],
arg_keys=['<deployment-id>', '--max-count', '--interval'],
function=_deployment_watch),
cmds.Command(
hierarchy=['marathon', 'task', 'list'],
arg_keys=['<app-id>'],
function=_task_list),
cmds.Command(
hierarchy=['marathon', 'task', 'show'],
arg_keys=['<task-id>'],
function=_task_show),
cmds.Command(
hierarchy=['marathon', 'app', 'add'],
arg_keys=['<app-resource>'],
function=_add),
cmds.Command(
hierarchy=['marathon', 'app', 'list'],
arg_keys=[],
function=_list),
cmds.Command(
hierarchy=['marathon', 'app', 'remove'],
arg_keys=['<app-id>', '--force'],
function=_remove),
cmds.Command(
hierarchy=['marathon', 'app', 'show'],
arg_keys=['<app-id>', '--app-version'],
function=_show),
cmds.Command(
hierarchy=['marathon', 'app', 'start'],
arg_keys=['<app-id>', '<instances>', '--force'],
function=_start),
cmds.Command(
hierarchy=['marathon', 'app', 'stop'],
arg_keys=['<app-id>', '--force'],
function=_stop),
cmds.Command(
hierarchy=['marathon', 'app', 'update'],
arg_keys=['<app-id>', '<properties>', '--force'],
function=_update),
cmds.Command(
hierarchy=['marathon', 'app', 'restart'],
arg_keys=['<app-id>', '--force'],
function=_restart),
cmds.Command(
hierarchy=['marathon', 'group', 'add'],
arg_keys=['<group-resource>'],
function=_group_add),
cmds.Command(
hierarchy=['marathon', 'group', 'list'],
arg_keys=[],
function=_group_list),
cmds.Command(
hierarchy=['marathon', 'group', 'show'],
arg_keys=['<group-id>', '--group-version'],
function=_group_show),
cmds.Command(
hierarchy=['marathon', 'group', 'remove'],
arg_keys=['<group-id>', '--force'],
function=_group_remove),
cmds.Command(
hierarchy=['marathon', 'about'],
arg_keys=[],
function=_about),
cmds.Command(
hierarchy=['marathon'],
arg_keys=['--config-schema', '--info'],
function=_marathon)
]
def _marathon(config_schema, info):
"""
:param config_schema: Whether to output the config schema
:type config_schema: boolean
:param info: Whether to output a description of this subcommand
:type info: boolean
:returns: Process status
:rtype: int
"""
if config_schema:
schema = _cli_config_schema()
emitter.publish(schema)
elif info:
_info()
else:
emitter.publish(options.make_generic_usage_message(__doc__))
return 1
return 0
def _info():
"""
:returns: Process status
:rtype: int
"""
emitter.publish(__doc__.split('\n')[0])
return 0
def _about():
"""
:returns: Process status
:rtype: int
"""
client = marathon.create_client()
emitter.publish(client.get_about())
return 0
def _get_resource(resource):
"""
:param resource: optional filename for the application or group resource
:type resource: str
:returns: resource
:rtype: dict
"""
if resource is not None:
with open(resource) as fd:
return util.load_json(fd)
# Check that stdin is not tty
if sys.stdin.isatty():
# We don't support TTY right now. In the future we will start an
# editor
raise DCOSException(
"We currently don't support reading from the TTY. Please "
"specify an application JSON.\n"
"Usage: dcos app add < app_resource.json")
return util.load_json(sys.stdin)
def _add(app_resource):
"""
:param app_resource: optional filename for the application resource
:type app_resource: str
:returns: Process status
:rtype: int
"""
application_resource = _get_resource(app_resource)
schema = _app_schema()
errs = util.validate_json(application_resource, schema)
if errs:
raise DCOSException(util.list_to_err(errs))
# Add application to marathon
client = marathon.create_client()
# Check that the application doesn't exist
app_id = client.normalize_app_id(application_resource['id'])
try:
client.get_app(app_id)
except DCOSException as e:
logger.exception(e)
else:
raise DCOSException("Application '{}' already exists".format(app_id))
client.add_app(application_resource)
return 0
def _list():
"""
:returns: process status
:rtype: int
"""
client = marathon.create_client()
apps = client.get_apps()
emitter.publish(apps)
return 0
def _group_list():
"""
:returns: process status
:rtype: int
"""
client = marathon.create_client()
groups = client.get_groups()
emitter.publish(groups)
return 0
def _group_add(group_resource):
"""
:param group_resource: optional filename for the group resource
:type group_resource: str
:returns: Process status
:rtype: int
"""
group_resource = _get_resource(group_resource)
schema = _data_schema()
errs = util.validate_json(group_resource, schema)
if errs:
raise DCOSException(util.list_to_err(errs))
client = marathon.create_client()
# Check that the group doesn't exist
group_id = client.normalize_app_id(group_resource['id'])
try:
client.get_group(group_id)
except DCOSException as e:
logger.exception(e)
else:
raise DCOSException("Group '{}' already exists".format(group_id))
client.create_group(group_resource)
return 0
def _remove(app_id, force):
"""
:param app_id: ID of the app to remove
:type app_id: str
:param force: Whether to override running deployments.
:type force: bool
:returns: Process status
:rtype: int
"""
client = marathon.create_client()
client.remove_app(app_id, force)
return 0
def _group_remove(group_id, force):
"""
:param group_id: ID of the app to remove
:type group_id: str
:param force: Whether to override running deployments.
:type force: bool
:returns: Process status
:rtype: int
"""
client = marathon.create_client()
client.remove_group(group_id, force)
return 0
def _show(app_id, version):
"""Show details of a Marathon application.
:param app_id: The id for the application
:type app_id: str
:param version: The version, either absolute (date-time) or relative
:type version: str
:returns: Process status
:rtype: int
"""
client = marathon.create_client()
if version is not None:
version = _calculate_version(client, app_id, version)
app = client.get_app(app_id, version=version)
emitter.publish(app)
return 0
def _group_show(group_id, version=None):
"""Show details of a Marathon application.
:param group_id: The id for the application
:type group_id: str
:param version: The version, either absolute (date-time) or relative
:type version: str
:returns: Process status
:rtype: int
"""
client = marathon.create_client()
app = client.get_group(group_id, version=version)
emitter.publish(app)
return 0
def _start(app_id, instances, force):
"""Start a Marathon application.
:param app_id: the id for the application
:type app_id: str
:param instances: the number of instances to start
:type instances: str
:param force: whether to override running deployments
:type force: bool
:returns: Process status
:rtype: int
"""
# Check that the application exists
client = marathon.create_client()
desc = client.get_app(app_id)
if desc['instances'] > 0:
emitter.publish(
'Application {!r} already started: {!r} instances.'.format(
app_id,
desc['instances']))
return 1
# Need to add the 'id' because it is required
app_json = {'id': app_id}
# Set instances to 1 if not specified
if instances is None:
instances = 1
else:
instances = util.parse_int(instances)
if instances <= 0:
emitter.publish(
'The number of instances must be positive: {!r}.'.format(
instances))
return 1
app_json['instances'] = instances
deployment = client.update_app(app_id, app_json, force)
emitter.publish('Created deployment {}'.format(deployment))
return 0
def _stop(app_id, force):
"""Stop a Marathon application
:param app_id: the id of the application
:type app_id: str
:param force: whether to override running deployments
:type force: bool
:returns: process status
:rtype: int
"""
# Check that the application exists
client = marathon.create_client()
desc = client.get_app(app_id)
if desc['instances'] <= 0:
emitter.publish(
'Application {!r} already stopped: {!r} instances.'.format(
app_id,
desc['instances']))
return 1
app_json = {'instances': 0}
deployment = client.update_app(app_id, app_json, force)
emitter.publish('Created deployment {}'.format(deployment))
def _update(app_id, json_items, force):
"""
:param app_id: the id of the application
:type app_id: str
:param json_items: json update items
:type json_items: list of str
:param force: whether to override running deployments
:type force: bool
:returns: process status
:rtype: int
"""
client = marathon.create_client()
# Ensure that the application exists
client.get_app(app_id)
if len(json_items) == 0:
if sys.stdin.isatty():
# We don't support TTY right now. In the future we will start an
# editor
emitter.publish(
"We currently don't support reading from the TTY. Please "
"specify an application JSON.\n"
"E.g. dcos app update < app_update.json")
return 1
else:
return _update_from_stdin(app_id, force)
schema = _app_schema()
# Need to add the 'id' because it is required
app_json = {'id': app_id}
for json_item in json_items:
key, value = jsonitem.parse_json_item(json_item, schema)
if key in app_json:
emitter.publish(
'Key {!r} was specified more than once'.format(key))
return 1
else:
app_json[key] = value
deployment = client.update_app(app_id, app_json, force)
emitter.publish('Created deployment {}'.format(deployment))
return 0
def _restart(app_id, force):
"""
:param app_id: the id of the application
:type app_id: str
:param force: whether to override running deployments
:type force: bool
:returns: process status
:rtype: int
"""
client = marathon.create_client()
desc = client.get_app(app_id)
if desc['instances'] <= 0:
app_id = client.normalize_app_id(app_id)
emitter.publish(
'Unable to perform rolling restart of application {!r} '
'because it has no running tasks'.format(
app_id,
desc['instances']))
return 1
payload = client.restart_app(app_id, force)
emitter.publish('Created deployment {}'.format(payload['deploymentId']))
return 0
def _version_list(app_id, max_count):
"""
:param app_id: the id of the application
:type app_id: str
:param max_count: the maximum number of version to fetch and return
:type max_count: str
:returns: process status
:rtype: int
"""
if max_count is not None:
max_count = util.parse_int(max_count)
client = marathon.create_client()
versions = client.get_app_versions(app_id, max_count)
emitter.publish(versions)
return 0
def _deployment_list(app_id):
"""
:param app_id: the application id
:type app_id: str
:returns: process status
:rtype: int
"""
client = marathon.create_client()
deployments = client.get_deployments(app_id)
emitter.publish(deployments)
return 0
def _deployment_stop(deployment_id):
"""
:param deployment_id: the application id
:type deployment_di: str
:returns: process status
:rtype: int
"""
client = marathon.create_client()
client.stop_deployment(deployment_id)
return 0
def _deployment_rollback(deployment_id):
"""
:param deployment_id: the application id
:type deployment_di: str
:returns: process status
:rtype: int
"""
client = marathon.create_client()
deployment = client.rollback_deployment(deployment_id)
emitter.publish(deployment)
return 0
def _deployment_watch(deployment_id, max_count, interval):
"""
:param deployment_id: the application id
:type deployment_di: str
:param max_count: maximum number of polling calls
:type max_count: str
:param interval: wait interval in seconds between polling calls
:type interval: str
:returns: process status
:rtype: int
"""
if max_count is not None:
max_count = util.parse_int(max_count)
interval = 1 if interval is None else util.parse_int(interval)
client = marathon.create_client()
count = 0
while max_count is None or count < max_count:
deployment = client.get_deployment(deployment_id)
if deployment is None:
return 0
emitter.publish(deployment)
time.sleep(interval)
count += 1
return 0
def _task_list(app_id):
"""
:param app_id: the id of the application
:type app_id: str
:returns: process status
:rtype: int
"""
client = marathon.create_client()
tasks = client.get_tasks(app_id)
emitter.publish(tasks)
return 0
def _task_show(task_id):
"""
:param task_id: the task id
:type task_id: str
:returns: process status
:rtype: int
"""
client = marathon.create_client()
task = client.get_task(task_id)
if task is None:
raise DCOSException("Task '{}' does not exist".format(task_id))
emitter.publish(task)
return 0
def _update_from_stdin(app_id, force):
"""
:param app_id: the id of the application
:type app_id: str
:param force: whether to override running deployments
:type force: bool
:returns: process status
:rtype: int
"""
logger.info('Updating %r from JSON object from stdin', app_id)
application_resource = util.load_jsons(sys.stdin.read())
# Add application to marathon
client = marathon.create_client()
client.update_app(app_id, application_resource, force)
return 0
def _calculate_version(client, app_id, version):
"""
:param client: Marathon client
:type client: dcos.marathon.Client
:param app_id: The ID of the application
:type app_id: str
:param version: Relative or absolute version or None
:type version: str
:returns: The absolute version as an ISO8601 date-time
:rtype: str
"""
# First let's try to parse it as a negative integer
try:
value = util.parse_int(version)
except DCOSException:
return version
else:
if value < 0:
value = -1 * value
# We have a negative value let's ask Marathon for the last
# abs(value)
versions = client.get_app_versions(app_id, value + 1)
if len(versions) <= value:
# We don't have enough versions. Return an error.
msg = "Application {!r} only has {!r} version(s)."
raise DCOSException(msg.format(app_id, len(versions), value))
else:
return versions[value]
else:
raise DCOSException(
'Relative versions must be negative: {}'.format(version))
def _cli_config_schema():
"""
:returns: schema for marathon cli config
:rtype: dict
"""
return json.loads(
pkg_resources.resource_string(
'dcoscli',
'data/config-schema/marathon.json').decode('utf-8'))
def _data_schema():
"""
:returns: schema for marathon data
:rtype: dict
"""
return json.loads(
pkg_resources.resource_string(
'dcoscli',
'data/marathon-group-schema.json').decode('utf-8'))
def _app_schema():
"""
:returns: schema for apps
:rtype: dict
"""
return _data_schema()['definitions']['app']