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helm.py
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#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright: Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import absolute_import, division, print_function
__metaclass__ = type
DOCUMENTATION = r"""
---
module: helm
short_description: Manages Kubernetes packages with the Helm package manager
version_added: "0.11.0"
author:
- Lucas Boisserie (@LucasBoisserie)
- Matthieu Diehr (@d-matt)
requirements:
- "helm (https://github.com/helm/helm/releases)"
- "yaml (https://pypi.org/project/PyYAML/)"
description:
- Install, upgrade, delete packages with the Helm package manager.
notes:
- The default idempotency check can fail to report changes when C(release_state) is set to C(present)
and C(chart_repo_url) is defined. Install helm diff >= 3.4.1 for better results.
options:
chart_ref:
description:
- chart_reference on chart repository.
- path to a packaged chart.
- path to an unpacked chart directory.
- absolute URL.
- Required when I(release_state) is set to C(present).
required: false
type: path
chart_repo_url:
description:
- Chart repository URL where to locate the requested chart.
required: false
type: str
chart_version:
description:
- Chart version to install. If this is not specified, the latest version is installed.
required: false
type: str
dependency_update:
description:
- Run standalone C(helm dependency update CHART) before the operation.
- Run inline C(--dependency-update) with C(helm install) command. This feature is not supported yet with the C(helm upgrade) command.
- So we should consider to use I(dependency_update) options with I(replace) option enabled when specifying I(chart_repo_url).
- The I(dependency_update) option require the add of C(dependencies) block in C(Chart.yaml/requirements.yaml) file.
- For more information please visit U(https://helm.sh/docs/helm/helm_dependency/)
default: false
type: bool
aliases: [ dep_up ]
version_added: "2.4.0"
release_name:
description:
- Release name to manage.
required: true
type: str
aliases: [ name ]
release_namespace:
description:
- Kubernetes namespace where the chart should be installed.
required: true
type: str
aliases: [ namespace ]
release_state:
choices: ['present', 'absent']
description:
- Desirated state of release.
required: false
default: present
aliases: [ state ]
type: str
release_values:
description:
- Value to pass to chart.
required: false
default: {}
aliases: [ values ]
type: dict
values_files:
description:
- Value files to pass to chart.
- Paths will be read from the target host's filesystem, not the host running ansible.
- values_files option is evaluated before values option if both are used.
- Paths are evaluated in the order the paths are specified.
required: false
default: []
type: list
elements: str
version_added: '1.1.0'
update_repo_cache:
description:
- Run C(helm repo update) before the operation. Can be run as part of the package installation or as a separate step (see Examples).
default: false
type: bool
set_values:
description:
- Values to pass to chart configuration
required: false
type: list
elements: dict
suboptions:
value:
description:
- Value to pass to chart configuration (e.g phase=prod).
type: str
required: true
value_type:
description:
- Use C(raw) set individual value.
- Use C(string) to force a string for an individual value.
- Use C(file) to set individual values from a file when the value itself is too long for the command line or is dynamically generated.
- Use C(json) to set json values (scalars/objects/arrays). This feature requires helm>=3.10.0.
default: raw
choices:
- raw
- string
- json
- file
version_added: '2.4.0'
reuse_values:
description:
- When upgrading package, specifies wether to reuse the last release's values and merge in any overrides from parameters I(release_values),
I(values_files) or I(set_values).
- If I(reset_values) is set to C(True), this is ignored.
type: bool
required: false
version_added: '2.5.0'
reset_values:
description:
- When upgrading package, reset the values to the ones built into the chart.
type: bool
required: false
default: True
version_added: '2.5.0'
#Helm options
disable_hook:
description:
- Helm option to disable hook on install/upgrade/delete.
default: False
type: bool
force:
description:
- Helm option to force reinstall, ignore on new install.
default: False
type: bool
purge:
description:
- Remove the release from the store and make its name free for later use.
default: True
type: bool
wait:
description:
- When I(release_state) is set to C(present), wait until all Pods, PVCs, Services,
and minimum number of Pods of a Deployment are in a ready state before marking the release as successful.
- When I(release_state) is set to C(absent), will wait until all the resources are deleted before returning.
It will wait for as long as I(wait_timeout). This feature requires helm>=3.7.0. Added in version 2.3.0.
default: False
type: bool
wait_timeout:
description:
- Timeout when wait option is enabled (helm2 is a number of seconds, helm3 is a duration).
- The use of I(wait_timeout) to wait for kubernetes commands to complete has been deprecated and will be removed after 2022-12-01.
type: str
timeout:
description:
- A Go duration (described here I(https://pkg.go.dev/time#ParseDuration)) value to wait for Kubernetes commands to complete. This defaults to 5m0s.
- similar to C(wait_timeout) but does not required C(wait) to be activated.
- Mutually exclusive with C(wait_timeout).
type: str
version_added: "2.3.0"
atomic:
description:
- If set, the installation process deletes the installation on failure.
type: bool
default: False
create_namespace:
description:
- Create the release namespace if not present.
type: bool
default: False
version_added: "0.11.1"
post_renderer:
description:
- Path to an executable to be used for post rendering.
type: str
version_added: "2.4.0"
replace:
description:
- Reuse the given name, only if that name is a deleted release which remains in the history.
- This is unsafe in production environment.
- mutually exclusive with with C(history_max).
type: bool
default: False
version_added: "1.11.0"
skip_crds:
description:
- Skip custom resource definitions when installing or upgrading.
type: bool
default: False
version_added: "1.2.0"
history_max:
description:
- Limit the maximum number of revisions saved per release.
- mutually exclusive with with C(replace).
type: int
version_added: "2.2.0"
extends_documentation_fragment:
- kubernetes.core.helm_common_options
"""
EXAMPLES = r"""
- name: Deploy latest version of Prometheus chart inside monitoring namespace (and create it)
kubernetes.core.helm:
name: test
chart_ref: stable/prometheus
release_namespace: monitoring
create_namespace: true
# From repository
- name: Add stable chart repo
kubernetes.core.helm_repository:
name: stable
repo_url: "https://kubernetes.github.io/ingress-nginx"
- name: Deploy latest version of Grafana chart inside monitoring namespace with values
kubernetes.core.helm:
name: test
chart_ref: stable/grafana
release_namespace: monitoring
values:
replicas: 2
- name: Deploy Grafana chart on 5.0.12 with values loaded from template
kubernetes.core.helm:
name: test
chart_ref: stable/grafana
chart_version: 5.0.12
values: "{{ lookup('template', 'somefile.yaml') | from_yaml }}"
- name: Deploy Grafana chart using values files on target
kubernetes.core.helm:
name: test
chart_ref: stable/grafana
release_namespace: monitoring
values_files:
- /path/to/values.yaml
- name: Remove test release and waiting suppression ending
kubernetes.core.helm:
name: test
state: absent
wait: true
- name: Separately update the repository cache
kubernetes.core.helm:
name: dummy
namespace: kube-system
state: absent
update_repo_cache: true
- name: Deploy Grafana chart using set values on target
kubernetes.core.helm:
name: test
chart_ref: stable/grafana
release_namespace: monitoring
set_values:
- value: phase=prod
value_type: string
# From git
- name: Git clone stable repo on HEAD
ansible.builtin.git:
repo: "http://github.com/helm/charts.git"
dest: /tmp/helm_repo
- name: Deploy Grafana chart from local path
kubernetes.core.helm:
name: test
chart_ref: /tmp/helm_repo/stable/grafana
release_namespace: monitoring
# From url
- name: Deploy Grafana chart on 5.6.0 from url
kubernetes.core.helm:
name: test
chart_ref: "https://github.com/grafana/helm-charts/releases/download/grafana-5.6.0/grafana-5.6.0.tgz"
release_namespace: monitoring
# Using complex Values
- name: Deploy new-relic client chart
kubernetes.core.helm:
name: newrelic-bundle
chart_ref: newrelic/nri-bundle
release_namespace: default
force: True
wait: True
replace: True
update_repo_cache: True
disable_hook: True
values:
global:
licenseKey: "{{ nr_license_key }}"
cluster: "{{ site_name }}"
newrelic-infrastructure:
privileged: True
ksm:
enabled: True
prometheus:
enabled: True
kubeEvents:
enabled: True
logging:
enabled: True
# Deploy latest version
- name: Deploy latest version of Grafana chart using reuse_values
kubernetes.core.helm:
name: test
chart_ref: stable/grafana
release_namespace: monitoring
reuse_values: true
values:
replicas: 2
version: 3e8ec0b2dffa40fb97d5342e4af887de95faa8c61a62480dd7f8aa03dffcf533
"""
RETURN = r"""
status:
type: complex
description: A dictionary of status output
returned: on success Creation/Upgrade/Already deploy
contains:
appversion:
type: str
returned: always
description: Version of app deployed
chart:
type: str
returned: always
description: Chart name and chart version
name:
type: str
returned: always
description: Name of the release
namespace:
type: str
returned: always
description: Namespace where the release is deployed
revision:
type: str
returned: always
description: Number of time where the release has been updated
status:
type: str
returned: always
description: Status of release (can be DEPLOYED, FAILED, ...)
updated:
type: str
returned: always
description: The Date of last update
values:
type: str
returned: always
description: Dict of Values used to deploy
stdout:
type: str
description: Full `helm` command stdout, in case you want to display it or examine the event log
returned: always
sample: ''
stderr:
type: str
description: Full `helm` command stderr, in case you want to display it or examine the event log
returned: always
sample: ''
command:
type: str
description: Full `helm` command built by this module, in case you want to re-run the command outside the module or debug a problem.
returned: always
sample: helm upgrade ...
"""
import re
import tempfile
import traceback
import copy
from ansible_collections.kubernetes.core.plugins.module_utils.version import (
LooseVersion,
)
try:
import yaml
IMP_YAML = True
IMP_YAML_ERR = None
except ImportError:
IMP_YAML_ERR = traceback.format_exc()
IMP_YAML = False
from ansible.module_utils.basic import missing_required_lib
from ansible_collections.kubernetes.core.plugins.module_utils.helm import (
AnsibleHelmModule,
parse_helm_plugin_list,
)
from ansible_collections.kubernetes.core.plugins.module_utils.helm_args_common import (
HELM_AUTH_ARG_SPEC,
)
def get_release(state, release_name):
"""
Get Release from all deployed releases
"""
if state is not None:
for release in state:
if release["name"] == release_name:
return release
return None
def get_release_status(module, release_name, all_status=False):
"""
Get Release state from all release status (deployed, failed, pending-install, etc)
"""
list_command = [
module.get_helm_binary(),
"list",
"--output=yaml",
"--filter",
release_name,
]
if all_status:
list_command.append("--all")
rc, out, err = module.run_helm_command(list_command)
release = get_release(yaml.safe_load(out), release_name)
if release is None: # not install
return None
release["values"] = module.get_values(release_name)
return release
def run_repo_update(module):
"""
Run Repo update
"""
repo_update_command = module.get_helm_binary() + " repo update"
rc, out, err = module.run_helm_command(repo_update_command)
def run_dep_update(module, chart_ref):
"""
Run dependency update
"""
dep_update = module.get_helm_binary() + " dependency update " + chart_ref
rc, out, err = module.run_helm_command(dep_update)
def fetch_chart_info(module, command, chart_ref):
"""
Get chart info
"""
inspect_command = command + " show chart " + chart_ref
rc, out, err = module.run_helm_command(inspect_command)
return yaml.safe_load(out)
def deploy(
module,
command,
release_name,
release_values,
chart_name,
wait,
wait_timeout,
disable_hook,
force,
values_files,
history_max,
atomic=False,
create_namespace=False,
replace=False,
post_renderer=None,
skip_crds=False,
timeout=None,
dependency_update=None,
set_value_args=None,
reuse_values=None,
reset_values=True,
):
"""
Install/upgrade/rollback release chart
"""
if replace:
# '--replace' is not supported by 'upgrade -i'
deploy_command = command + " install"
if dependency_update:
deploy_command += " --dependency-update"
else:
deploy_command = command + " upgrade -i" # install/upgrade
if reset_values:
deploy_command += " --reset-values"
if reuse_values is not None:
deploy_command += " --reuse-values=" + str(reuse_values)
if wait:
deploy_command += " --wait"
if wait_timeout is not None:
deploy_command += " --timeout " + wait_timeout
if atomic:
deploy_command += " --atomic"
if timeout:
deploy_command += " --timeout " + timeout
if force:
deploy_command += " --force"
if replace:
deploy_command += " --replace"
if disable_hook:
deploy_command += " --no-hooks"
if create_namespace:
deploy_command += " --create-namespace"
if values_files:
for value_file in values_files:
deploy_command += " --values=" + value_file
if release_values != {}:
fd, path = tempfile.mkstemp(suffix=".yml")
with open(path, "w") as yaml_file:
yaml.dump(release_values, yaml_file, default_flow_style=False)
deploy_command += " -f=" + path
module.add_cleanup_file(path)
if post_renderer:
deploy_command = " --post-renderer=" + post_renderer
if skip_crds:
deploy_command += " --skip-crds"
if history_max is not None:
deploy_command += " --history-max=%s" % str(history_max)
if set_value_args:
deploy_command += " " + set_value_args
deploy_command += " " + release_name + " " + chart_name
return deploy_command
def delete(command, release_name, purge, disable_hook, wait, wait_timeout):
"""
Delete release chart
"""
delete_command = command + " uninstall "
if not purge:
delete_command += " --keep-history"
if disable_hook:
delete_command += " --no-hooks"
if wait:
delete_command += " --wait"
if wait_timeout is not None:
delete_command += " --timeout " + wait_timeout
delete_command += " " + release_name
return delete_command
def load_values_files(values_files):
values = {}
for values_file in values_files or []:
with open(values_file, "r") as fd:
content = yaml.safe_load(fd)
if not isinstance(content, dict):
continue
for k, v in content.items():
values[k] = v
return values
def get_plugin_version(plugin):
"""
Check if helm plugin is installed and return corresponding version
"""
rc, output, err, command = module.get_helm_plugin_list()
out = parse_helm_plugin_list(output=output.splitlines())
if not out:
return None
for line in out:
if line[0] == plugin:
return line[1]
return None
def helmdiff_check(
module,
release_name,
chart_ref,
release_values,
values_files=None,
chart_version=None,
replace=False,
chart_repo_url=None,
):
"""
Use helm diff to determine if a release would change by upgrading a chart.
"""
cmd = module.get_helm_binary() + " diff upgrade"
cmd += " " + release_name
cmd += " " + chart_ref
if chart_repo_url is not None:
cmd += " " + "--repo=" + chart_repo_url
if chart_version is not None:
cmd += " " + "--version=" + chart_version
if not replace:
cmd += " " + "--reset-values"
if release_values != {}:
fd, path = tempfile.mkstemp(suffix=".yml")
with open(path, "w") as yaml_file:
yaml.dump(release_values, yaml_file, default_flow_style=False)
cmd += " -f=" + path
module.add_cleanup_file(path)
if values_files:
for values_file in values_files:
cmd += " -f=" + values_file
rc, out, err = module.run_helm_command(cmd)
return (len(out.strip()) > 0, out.strip())
def default_check(release_status, chart_info, values=None, values_files=None):
"""
Use default check to determine if release would change by upgrading a chart.
"""
# the 'appVersion' specification is optional in a chart
chart_app_version = chart_info.get("appVersion", None)
released_app_version = release_status.get("app_version", None)
# when deployed without an 'appVersion' chart value the 'helm list' command will return the entry `app_version: ""`
appversion_is_same = (chart_app_version == released_app_version) or (
chart_app_version is None and released_app_version == ""
)
if values_files:
values_match = release_status["values"] == load_values_files(values_files)
else:
values_match = release_status["values"] == values
return (
not values_match
or (chart_info["name"] + "-" + chart_info["version"]) != release_status["chart"]
or not appversion_is_same
)
def argument_spec():
arg_spec = copy.deepcopy(HELM_AUTH_ARG_SPEC)
arg_spec.update(
dict(
chart_ref=dict(type="path"),
chart_repo_url=dict(type="str"),
chart_version=dict(type="str"),
dependency_update=dict(type="bool", default=False, aliases=["dep_up"]),
release_name=dict(type="str", required=True, aliases=["name"]),
release_namespace=dict(type="str", required=True, aliases=["namespace"]),
release_state=dict(
default="present", choices=["present", "absent"], aliases=["state"]
),
release_values=dict(type="dict", default={}, aliases=["values"]),
values_files=dict(type="list", default=[], elements="str"),
update_repo_cache=dict(type="bool", default=False),
disable_hook=dict(type="bool", default=False),
force=dict(type="bool", default=False),
purge=dict(type="bool", default=True),
wait=dict(type="bool", default=False),
wait_timeout=dict(type="str"),
timeout=dict(type="str"),
atomic=dict(type="bool", default=False),
create_namespace=dict(type="bool", default=False),
post_renderer=dict(type="str"),
replace=dict(type="bool", default=False),
skip_crds=dict(type="bool", default=False),
history_max=dict(type="int"),
set_values=dict(type="list", elements="dict"),
reuse_values=dict(type="bool"),
reset_values=dict(type="bool", default=True),
)
)
return arg_spec
def main():
global module
module = AnsibleHelmModule(
argument_spec=argument_spec(),
required_if=[
("release_state", "present", ["release_name", "chart_ref"]),
("release_state", "absent", ["release_name"]),
],
mutually_exclusive=[
("context", "ca_cert"),
("replace", "history_max"),
("wait_timeout", "timeout"),
],
supports_check_mode=True,
)
if not IMP_YAML:
module.fail_json(msg=missing_required_lib("yaml"), exception=IMP_YAML_ERR)
changed = False
chart_ref = module.params.get("chart_ref")
chart_repo_url = module.params.get("chart_repo_url")
chart_version = module.params.get("chart_version")
dependency_update = module.params.get("dependency_update")
release_name = module.params.get("release_name")
release_state = module.params.get("release_state")
release_values = module.params.get("release_values")
values_files = module.params.get("values_files")
update_repo_cache = module.params.get("update_repo_cache")
# Helm options
disable_hook = module.params.get("disable_hook")
force = module.params.get("force")
purge = module.params.get("purge")
wait = module.params.get("wait")
wait_timeout = module.params.get("wait_timeout")
atomic = module.params.get("atomic")
create_namespace = module.params.get("create_namespace")
post_renderer = module.params.get("post_renderer")
replace = module.params.get("replace")
skip_crds = module.params.get("skip_crds")
history_max = module.params.get("history_max")
timeout = module.params.get("timeout")
set_values = module.params.get("set_values")
reuse_values = module.params.get("reuse_values")
reset_values = module.params.get("reset_values")
if update_repo_cache:
run_repo_update(module)
# Get real/deployed release status
all_status = release_state == "absent"
release_status = get_release_status(module, release_name, all_status=all_status)
helm_cmd = module.get_helm_binary()
opt_result = {}
if release_state == "absent" and release_status is not None:
# skip release statuses 'uninstalled' and 'uninstalling'
if not release_status["status"].startswith("uninstall"):
if replace:
module.fail_json(msg="replace is not applicable when state is absent")
if wait:
helm_version = module.get_helm_version()
if LooseVersion(helm_version) < LooseVersion("3.7.0"):
opt_result["warnings"] = []
opt_result["warnings"].append(
"helm uninstall support option --wait for helm release >= 3.7.0"
)
wait = False
helm_cmd = delete(
helm_cmd, release_name, purge, disable_hook, wait, wait_timeout
)
changed = True
elif release_state == "present":
if chart_version is not None:
helm_cmd += " --version=" + chart_version
if chart_repo_url is not None:
helm_cmd += " --repo=" + chart_repo_url
# Fetch chart info to have real version and real name for chart_ref from archive, folder or url
chart_info = fetch_chart_info(module, helm_cmd, chart_ref)
if dependency_update:
if chart_info.get("dependencies"):
# Can't use '--dependency-update' with 'helm upgrade' that is the
# default chart install method, so if chart_repo_url is defined
# we can't use the dependency update command. But, in the near future
# we can get rid of this method and use only '--dependency-update'
# option. Please see https://github.com/helm/helm/pull/8810
if not chart_repo_url and not re.fullmatch(
r"^http[s]*://[\w.:/?&=-]+$", chart_ref
):
run_dep_update(module, chart_ref)
# To not add --dependency-update option in the deploy function
dependency_update = False
else:
module.warn(
"This is a not stable feature with 'chart_repo_url'. Please consider to use dependency update with on-disk charts"
)
if not replace:
msg_fail = (
"'--dependency-update' hasn't been supported yet with 'helm upgrade'. "
"Please use 'helm install' instead by adding 'replace' option"
)
module.fail_json(msg=msg_fail)
else:
module.warn(
"There is no dependencies block defined in Chart.yaml. Dependency update will not be performed. "
"Please consider add dependencies block or disable dependency_update to remove this warning."
)
if release_status is None: # Not installed
set_value_args = None
if set_values:
set_value_args = module.get_helm_set_values_args(set_values)
helm_cmd = deploy(
module,
helm_cmd,
release_name,
release_values,
chart_ref,
wait,
wait_timeout,
disable_hook,
False,
values_files=values_files,
atomic=atomic,
create_namespace=create_namespace,
post_renderer=post_renderer,
replace=replace,
dependency_update=dependency_update,
skip_crds=skip_crds,
history_max=history_max,
timeout=timeout,
set_value_args=set_value_args,
reuse_values=reuse_values,
reset_values=reset_values,
)
changed = True
else:
helm_diff_version = get_plugin_version("diff")
if helm_diff_version and (
not chart_repo_url
or (
chart_repo_url
and LooseVersion(helm_diff_version) >= LooseVersion("3.4.1")
)
):
(would_change, prepared) = helmdiff_check(
module,
release_name,
chart_ref,
release_values,
values_files,
chart_version,
replace,
chart_repo_url,
)
if would_change and module._diff:
opt_result["diff"] = {"prepared": prepared}
else:
module.warn(
"The default idempotency check can fail to report changes in certain cases. "
"Install helm diff >= 3.4.1 for better results."
)
would_change = default_check(
release_status, chart_info, release_values, values_files
)
if force or would_change:
set_value_args = None
if set_values:
set_value_args = module.get_helm_set_values_args(set_values)
helm_cmd = deploy(
module,
helm_cmd,
release_name,
release_values,
chart_ref,
wait,
wait_timeout,
disable_hook,
force,
values_files=values_files,
atomic=atomic,
create_namespace=create_namespace,
post_renderer=post_renderer,
replace=replace,
skip_crds=skip_crds,
history_max=history_max,
timeout=timeout,
dependency_update=dependency_update,
set_value_args=set_value_args,
reuse_values=reuse_values,
reset_values=reset_values,
)
changed = True
if module.check_mode:
check_status = {"values": {"current": {}, "declared": {}}}
if release_status:
check_status["values"]["current"] = release_status["values"]
check_status["values"]["declared"] = release_status
module.exit_json(
changed=changed,
command=helm_cmd,
status=check_status,
stdout="",
stderr="",
**opt_result,
)
elif not changed:
module.exit_json(
changed=False,
status=release_status,
stdout="",
stderr="",
command=helm_cmd,
**opt_result,
)
rc, out, err = module.run_helm_command(helm_cmd)
module.exit_json(
changed=changed,
stdout=out,
stderr=err,
status=get_release_status(module, release_name, all_status=True),
command=helm_cmd,
**opt_result,
)
if __name__ == "__main__":
main()