def get_docker_images(repo=None,
tag=None,
field='IMAGE ID',
con_ssh=None,
fail_ok=False):
"""
get values for given docker image via 'docker image ls <repo>'
Args:
repo (str):
tag (str|None):
field (str|tuple|list):
con_ssh:
fail_ok
Returns (list|None): return None if no docker images returned at all due
to cmd failure
"""
args = None
if repo:
args = repo
if tag:
args += ':{}'.format(tag)
code, output = exec_docker_cmd(sub_cmd='image ls',
args=args,
fail_ok=fail_ok,
con_ssh=con_ssh)
if code != 0:
return None
table_ = table_parser.table_kube(output)
if not table_['values']:
if fail_ok:
return None
else:
raise exceptions.ContainerError(
"docker image {} does not exist".format(args))
values = table_parser.get_multi_values(table_,
fields=field,
zip_values=True)
return values
def get_nodes(hosts=None,
status=None,
field='STATUS',
exclude=False,
con_ssh=None,
fail_ok=False):
"""
Get nodes values via 'kubectl get nodes'
Args:
hosts (None|str|list|tuple): table filter
status (None|str|list|tuple): table filter
field (str|list|tuple): any header of the nodes table
exclude (bool): whether to exclude rows with given criteria
con_ssh:
fail_ok:
Returns (None|list): None if cmd failed.
"""
code, output = exec_kube_cmd('get',
args='nodes',
con_ssh=con_ssh,
fail_ok=fail_ok)
if code > 0:
return None
table_ = table_parser.table_kube(output)
if hosts or status:
table_ = table_parser.filter_table(table_,
exclude=exclude,
**{
'NAME': hosts,
'STATUS': status
})
return table_parser.get_multi_values(table_, field)