def get_values(self, namespace, release_name, get_all=True):
"""
get_all=True will also dump chart default values.
get_all=False will only return user overridden values.
"""
cmd = ["helm", "get", "values", "--namespace", namespace, release_name]
if get_all:
cmd += ["--all"]
return yaml.safe_load(helpers.run_command(cmd))
def rollback(self, namespace, release_name, revision=None):
if not revision:
history = self.history(namespace, release_name)
if history and len(history) > 1:
# Rollback to previous
revision = history[-2].get('REVISION')
else:
return
return helpers.run_command(
["helm", "rollback", "--namespace", namespace,
release_name, revision])
def _set_values_and_run_command(self, cmd, values):
"""
Handles helm values by writing values to a temporary file,
after which the command is run. The temporary file is cleaned
up on exit from this method. This allows special values like braces
to be handled without complex escaping, which the helm --set flag
can't handle.
"""
with tempfile.NamedTemporaryFile(mode="w", prefix="helmsman") as f:
yaml.dump(values, stream=f, default_flow_style=False)
cmd += ["-f", f.name]
return helpers.run_command(cmd)
def _set_values_and_run_command(self, cmd, values_list):
"""
Handles helm values by writing values to a temporary file,
after which the command is run. The temporary file is cleaned
up on exit from this method. This allows special values like braces
to be handled without complex escaping, which the helm --set flag
can't handle.
The values can be a list of values files, in which case they will
all be written to multiple temp files and passed to helm.
"""
if not isinstance(values_list, list):
values_list = [values_list]
# contextlib.exitstack allows multiple temp files to be cleaned up
# on exit. ref: https://stackoverflow.com/a/19412700
with contextlib.ExitStack() as stack:
files = [
stack.enter_context(hm_helpers.TempValuesFile(values))
for values in values_list
]
for file in files:
cmd += ["-f", file.name]
return helpers.run_command(cmd)
def delete(self, repo_name):
return helpers.run_command(["helm", "repo", "remove", repo_name])
def create(self, repo_name, url):
return helpers.run_command(["helm", "repo", "add", repo_name, url])
def update(self):
return helpers.run_command(["helm", "repo", "update"])
def delete(self, namespace, release_name):
return helpers.run_command(
["helm", "delete", "--namespace", namespace, release_name])