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Fixing/cleaning up kubernetes submission

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1) Removed kubectl functionality. We'll move that into a different
   module in the future. Also removed post/put/patch/delete options,
   as they are not Ansible best practice.
2) Expanded error handling in areas where tracebacks were most likely,
   based on bad data from users, etc.
3) Added an 'insecure' option and made the password param optional, to
   enable the use of the local insecure port.
4) Allowed the data (both inline and from the file) to support multiple
   items via a list. This is common in YAML files where mutliple docs
   are used to create/remove multiple resources in one shot.
5) General bug fixing.
reviewable/pr18780/r1
James Cammarata 9 years ago
parent dc356ffd92
commit 393e43b876
1 changed files with 122 additions and 179 deletions
Show Stats Download Patch File Download Diff File

283
clustering/kubernetes.py
Unescape Escape View File

@ -28,9 +28,6 @@ description:
Only supports HTTP Basic Auth
Only supports 'strategic merge' for update, http://goo.gl/fCPYxT
SSL certs are not working, use 'validate_certs=off' to disable
This module can mimic the 'kubectl' Kubernetes client for commands
such as 'get', 'cluster-info', and 'version'. This is useful if you
want to fetch full object details for existing Kubernetes resources.
options:
api_endpoint:
description:
@ -40,12 +37,14 @@ options:
aliases: ["endpoint"]
inline_data:
description:
- The Kubernetes YAML data to send to the API I(endpoint).
- The Kubernetes YAML data to send to the API I(endpoint). This option is
mutually exclusive with C('file_reference').
required: true
default: null
file_reference:
description:
- Specify full path to a Kubernets YAML file to send to API I(endpoint).
This option is mutually exclusive with C('inline_data').
required: false
default: null
certificate_authority_data:
@ -56,53 +55,27 @@ options:
'match_hostname' that can match the IP address against the CA data.
required: false
default: null
kubectl_api_versions:
description:
- Mimic the 'kubectl api-versions' command, values are ignored.
required: false
default: null
kubectl_cluster_info:
description:
- Mimic the 'kubectl cluster-info' command, values are ignored.
required: false
default: null
kubectl_get:
description:
- Mimic the 'kubectl get' command. Specify the object(s) to fetch such
as 'pods' or 'replicationcontrollers/mycontroller'. It does not
support shortcuts (e.g. 'po', 'rc', 'svc').
required: false
default: null
kubectl_namespace:
description:
- Specify the namespace to use for 'kubectl' commands.
required: false
default: "default"
kubectl_version:
description:
- Mimic the 'kubectl version' command, values are ignored.
required: false
default: null
state:
description:
- The desired action to take on the Kubernetes data, or 'kubectl' to
mimic some kubectl commands.
- The desired action to take on the Kubernetes data.
required: true
default: "present"
choices: ["present", "post", "absent", "delete", "update", "patch",
"replace", "put", "kubectl"]
url_password:
choices: ["present", "absent", "update", "replace"]
password:
description:
- The HTTP Basic Auth password for the API I(endpoint).
required: true
- The HTTP Basic Auth password for the API I(endpoint). This should be set
unless using the C('insecure') option.
default: null
aliases: ["password", "api_password"]
url_username:
username:
description:
- The HTTP Basic Auth username for the API I(endpoint).
required: true
- The HTTP Basic Auth username for the API I(endpoint). This should be set
unless using the C('insecure') option.
default: "admin"
aliases: ["username", "api_username"]
insecure:
description:
- "Reverts the connection to using HTTP instead of HTTPS. This option should
only be used when execuing the M('kubernetes') module local to the Kubernetes
cluster using the insecure local port (locahost:8080 by default)."
validate_certs:
description:
- Enable/disable certificate validation. Note that this is set to
@ -110,7 +83,6 @@ options:
hostname matching (exists in >= python3.5.0).
required: false
default: false
choices: BOOLEANS
author: "Eric Johnson (@erjohnso) <erjohnso@google.com>"
'''
@ -120,8 +92,8 @@ EXAMPLES = '''
- name: Create a kubernetes namespace
kubernetes:
api_endpoint: 123.45.67.89
url_username: admin
url_password: redacted
username: admin
password: redacted
inline_data:
kind: Namespace
apiVersion: v1
@ -139,28 +111,19 @@ EXAMPLES = '''
- name: Create a kubernetes namespace
kubernetes:
api_endpoint: 123.45.67.89
url_username: admin
url_password: redacted
username: admin
password: redacted
file_reference: /path/to/create_namespace.yaml
state: present
# Fetch info about the Kubernets cluster with a fake 'kubectl' command.
- name: Look up cluster info
# Do the same thing, but using the insecure localhost port
- name: Create a kubernetes namespace
kubernetes:
api_endpoint: 123.45.67.89
url_username: admin
url_password: redacted
kubectl_cluster_info: 1
state: kubectl
insecure: true
file_reference: /path/to/create_namespace.yaml
state: present
# Fetch info about the Kubernets pods with a fake 'kubectl' command.
- name: Look up pods
kubernetes:
api_endpoint: 123.45.67.89
url_username: admin
url_password: redacted
kubectl_get: pods
state: kubectl
'''
RETURN = '''
@ -259,6 +222,7 @@ USER_AGENT = "ansible-k8s-module/0.0.1"
# - Set 'required=true' for certificate_authority_data and ensure that
# ansible's SSLValidationHandler.get_ca_certs() can pick up this CA cert
# - Set 'required=true' for the validate_certs param.
def decode_cert_data(module):
return
d = module.params.get("certificate_authority_data")
@ -270,75 +234,70 @@ def api_request(module, url, method="GET", headers=None, data=None):
body = None
if data:
data = json.dumps(data)
response, info = fetch_url(module, url, method=method, headers=headers,
data=data)
response, info = fetch_url(module, url, method=method, headers=headers, data=data)
if int(info['status']) == -1:
module.fail_json(msg="Failed to execute the API request: %s" % info['msg'], url=url, method=method, headers=headers)
if response is not None:
body = json.loads(response.read())
return info, body
def k8s_kubectl_get(module, url):
req = module.params.get("kubectl_get")
info, body = api_request(module, url + "/" + req)
def k8s_create_resource(module, url, data):
info, body = api_request(module, url, method="POST", data=data, headers={"Content-Type": "application/json"})
if info['status'] == 409:
name = data["metadata"].get("name", None)
info, body = api_request(module, url + "/" + name)
return False, body
elif info['status'] >= 400:
module.fail_json(msg="failed to create the resource: %s" % info['msg'], url=url)
return True, body
def k8s_delete_resource(module, url, data):
name = None
if 'metadata' in data:
name = data['metadata'].get('name')
name = data.get('metadata', {}).get('name')
if name is None:
module.fail_json(msg="Missing a named resource in object metadata")
url = url + '/' + name
module.fail_json(msg="Missing a named resource in object metadata when trying to remove a resource")
url = url + '/' + name
info, body = api_request(module, url, method="DELETE")
if info['status'] == 404:
return False, {}
if info['status'] == 200:
return True, body
module.fail_json(msg="%s: fetching URL '%s'" % (info['msg'], url))
def k8s_create_resource(module, url, data):
info, body = api_request(module, url, method="POST", data=data)
if info['status'] == 409:
name = data["metadata"].get("name", None)
info, body = api_request(module, url + "/" + name)
return False, body
return True, body
return False, "Resource name '%s' already absent" % name
elif info['status'] >= 400:
module.fail_json(msg="failed to delete the resource '%s': %s" % (name, info['msg']), url=url)
return True, "Successfully deleted resource name '%s'" % name
def k8s_replace_resource(module, url, data):
name = None
if 'metadata' in data:
name = data['metadata'].get('name')
name = data.get('metadata', {}).get('name')
if name is None:
module.fail_json(msg="Missing a named resource in object metadata")
url = url + '/' + name
module.fail_json(msg="Missing a named resource in object metadata when trying to replace a resource")
info, body = api_request(module, url, method="PUT", data=data)
headers = {"Content-Type": "application/json"}
url = url + '/' + name
info, body = api_request(module, url, method="PUT", data=data, headers=headers)
if info['status'] == 409:
name = data["metadata"].get("name", None)
info, body = api_request(module, url + "/" + name)
return False, body
elif info['status'] >= 400:
module.fail_json(msg="failed to replace the resource '%s': %s" % (name, info['msg']), url=url)
return True, body
def k8s_update_resource(module, url, data):
name = None
if 'metadata' in data:
name = data['metadata'].get('name')
name = data.get('metadata', {}).get('name')
if name is None:
module.fail_json(msg="Missing a named resource in object metadata")
url = url + '/' + name
module.fail_json(msg="Missing a named resource in object metadata when trying to update a resource")
headers = {"Content-Type": "application/strategic-merge-patch+json"}
info, body = api_request(module, url, method="PATCH", data=data,
headers=headers)
url = url + '/' + name
info, body = api_request(module, url, method="PATCH", data=data, headers=headers)
if info['status'] == 409:
name = data["metadata"].get("name", None)
info, body = api_request(module, url + "/" + name)
return False, body
elif info['status'] >= 400:
module.fail_json(msg="failed to update the resource '%s': %s" % (name, info['msg']), url=url)
return True, body
@ -347,97 +306,81 @@ def main():
argument_spec=dict(
http_agent=dict(default=USER_AGENT),
url_username=dict(default="admin"),
url_password=dict(required=True, no_log=True),
username=dict(default="admin"),
password=dict(default="", no_log=True),
force_basic_auth=dict(default="yes"),
validate_certs=dict(default=False, choices=BOOLEANS),
validate_certs=dict(default=False, type='bool'),
certificate_authority_data=dict(required=False),
# fake 'kubectl' commands
kubectl_api_versions=dict(required=False),
kubectl_cluster_info=dict(required=False),
kubectl_get=dict(required=False),
kubectl_namespace=dict(required=False, default="default"),
kubectl_version=dict(required=False),
# k8s API module variables
insecure=dict(default=False, type='bool'),
api_endpoint=dict(required=True),
file_reference=dict(required=False),
inline_data=dict(required=False),
state=dict(default="present",
choices=["present", "post",
"absent", "delete",
"update", "put",
"replace", "patch",
"kubectl"])
)
state=dict(default="present", choices=["present", "absent", "update", "replace"])
),
mutually_exclusive = (('file_reference', 'inline_data'), ('username', 'insecure'), ('password', 'insecure')),
required_one_of = (('file_reference', 'inline_data'),),
)
decode_cert_data(module)
changed = False
data = module.params.get('inline_data', {})
api_endpoint = module.params.get('api_endpoint')
state = module.params.get('state')
insecure = module.params.get('insecure')
inline_data = module.params.get('inline_data')
file_reference = module.params.get('file_reference')
if inline_data:
data = inline_data
else:
try:
f = open(file_reference, "r")
data = [x for x in yaml.load_all(f)]
f.close()
if not data:
dfile = module.params.get('file_reference')
if dfile:
f = open(dfile, "r")
data = yaml.load(f)
module.fail_json(msg="No valid data could be found.")
except:
module.fail_json(msg="The file '%s' was not found or contained invalid YAML/JSON data" % file_reference)
endpoint = "https://" + module.params.get('api_endpoint')
url = endpoint
# set the transport type and build the target endpoint url
transport = 'https'
if insecure:
transport = 'http'
namespace = "default"
if data and 'metadata' in data:
namespace = data['metadata'].get('namespace', "default")
kind = data['kind'].lower()
url = endpoint + KIND_URL[kind]
url = url.replace("{namespace}", namespace)
target_endpoint = "%s://%s" % (transport, api_endpoint)
# check for 'kubectl' commands
kubectl_api_versions = module.params.get('kubectl_api_versions')
kubectl_cluster_info = module.params.get('kubectl_cluster_info')
kubectl_get = module.params.get('kubectl_get')
kubectl_namespace = module.params.get('kubectl_namespace')
kubectl_version = module.params.get('kubectl_version')
body = []
changed = False
state = module.params.get('state')
if state in ['present', 'post']:
changed, body = k8s_create_resource(module, url, data)
module.exit_json(changed=changed, api_response=body)
# make sure the data is a list
if not isinstance(data, list):
data = [ data ]
if state in ['absent', 'delete']:
changed, body = k8s_delete_resource(module, url, data)
module.exit_json(changed=changed, api_response=body)
for item in data:
namespace = "default"
if item and 'metadata' in item:
namespace = item.get('metadata', {}).get('namespace', "default")
kind = item.get('kind', '').lower()
try:
url = target_endpoint + KIND_URL[kind]
except KeyError:
module.fail_json("invalid resource kind specified in the data: '%s'" % kind)
url = url.replace("{namespace}", namespace)
else:
url = target_endpoint
if state in ['replace', 'put']:
changed, body = k8s_replace_resource(module, url, data)
module.exit_json(changed=changed, api_response=body)
if state == 'present':
item_changed, item_body = k8s_create_resource(module, url, item)
elif state == 'absent':
item_changed, item_body = k8s_delete_resource(module, url, item)
elif state == 'replace':
item_changed, item_body = k8s_replace_resource(module, url, item)
elif state == 'update':
item_changed, item_body = k8s_update_resource(module, url, item)
if state in ['update', 'patch']:
changed, body = k8s_update_resource(module, url, data)
module.exit_json(changed=changed, api_response=body)
changed |= item_changed
body.append(item_body)
if state == 'kubectl':
kurl = url + "/api/v1/namespaces/" + kubectl_namespace
if kubectl_get:
if kubectl_get.startswith("namespaces"):
kurl = url + "/api/v1"
changed, body = k8s_kubectl_get(module, kurl)
module.exit_json(changed=changed, api_response=body)
if kubectl_version:
info, body = api_request(module, url + "/version")
module.exit_json(changed=False, api_response=body)
if kubectl_api_versions:
info, body = api_request(module, url + "/api")
module.exit_json(changed=False, api_response=body)
if kubectl_cluster_info:
info, body = api_request(module, url +
"/api/v1/namespaces/kube-system"
"/services?labelSelector=kubernetes"
".io/cluster-service=true")
module.exit_json(changed=False, api_response=body)
module.fail_json(msg="Invalid state: '%s'" % state)
# import module snippets

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