Flake8 cleanups

Tox can now run the linters test.

The linters gate job is added.

Change-Id: If39545c928991baa47c919ab6b357bf47ca9ca90

.zuul.yaml

@@ -92,12 +92,14 @@
 - project:
     check:
       jobs:
+        - tox-linters
         - zuul-tox-docs
         - zuul-operator-build-image
         - zuul-operator-functional-k8s:
             dependencies: zuul-operator-build-image
     gate:
       jobs:
+        - tox-linters
         - zuul-tox-docs
         - zuul-operator-upload-image
         - zuul-operator-functional-k8s:

tox.ini

@@ -1,13 +1,12 @@
 [tox]
 minversion = 1.6
 skipsdist = True
-envlist = pep8
+envlist = linters,docs
 
 [testenv]
 basepython = python3
 install_command = pip install {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
 commands =
   python setup.py testr --slowest --testr-args='{posargs}'
 
@@ -26,8 +25,8 @@ deps =
 commands =
   sphinx-build -E -W -d doc/build/doctrees -b html doc/source/ doc/build/html
 
-[testenv:pep8]
+[testenv:linters]
-whitelist_externals = bash
+deps = flake8
 commands =
   flake8 {posargs}
 
@@ -40,3 +39,6 @@ commands = {posargs}
 ignore = E124,E125,E129,E252,E402,E741,H,W503,W504
 show-source = True
 exclude = .venv,.tox,dist,doc,build,*.egg
+per-file-ignores =
+  # Allow import * to create a superset of objects
+  zuul_operator/objects.py:F403,F405

zuul_operator/__init__.py

@@ -13,3 +13,5 @@
 # under the License.
 
 from .operator import ZuulOperator
+
+__all__ = [ZuulOperator]

zuul_operator/certmanager.py

@@ -13,7 +13,6 @@
 # under the License.
 
 import time
-import base64
 
 import pykube
 
@@ -31,7 +30,7 @@ class CertManager:
         kind = objects.get_object('apiextensions.k8s.io/v1beta1',
                                   'CustomResourceDefinition')
         try:
-            obj = kind.objects(self.api).\
+            kind.objects(self.api).\
                 get(name="certificaterequests.cert-manager.io")
         except pykube.exceptions.ObjectDoesNotExist:
             return False
@@ -57,5 +56,5 @@ class CertManager:
                 self.log.info("Cert-manager is running")
                 return
             else:
-                self.log.info(f"Waiting for Cert-manager")
+                self.log.info("Waiting for Cert-manager")
                 time.sleep(10)

zuul_operator/objects.py

@@ -14,6 +14,7 @@
 
 import inspect
 
+# We deliberately import * to create a superset of objects.
 from pykube.objects import *
 
 

zuul_operator/operator.py

@@ -14,15 +14,11 @@
 
 import asyncio
 import collections
-import yaml
 
 import kopf
 import pykube
-import kubernetes
 
 from . import objects
-from . import utils
-from . import certmanager
 from .zuul import Zuul
 
 
@@ -99,7 +95,8 @@ def create_fn(spec, name, namespace, logger, **kwargs):
     zuul.write_zuul_conf()
     zuul.create_zuul()
 
-    #return {'message': 'hello world'}  # will be the new status
+    # We can set a status with something like:
+    # return {'message': 'hello world'}
 
 
 @kopf.on.update('zuuls', backoff=10)

zuul_operator/pxc.py

@@ -31,7 +31,7 @@ class PXC:
         kind = objects.get_object('apiextensions.k8s.io/v1beta1',
                                   'CustomResourceDefinition')
         try:
-            obj = kind.objects(self.api).\
+            kind.objects(self.api).\
                 get(name="perconaxtradbclusters.pxc.percona.com")
         except pykube.exceptions.ObjectDoesNotExist:
             return False
@@ -62,7 +62,8 @@ class PXC:
                     namespace=self.namespace,
                     selector={'app.kubernetes.io/instance': 'db-cluster',
                               'app.kubernetes.io/component': 'pxc',
-                              'app.kubernetes.io/name': 'percona-xtradb-cluster'}):
+                              'app.kubernetes.io/name':
+                              'percona-xtradb-cluster'}):
                 if obj.obj['status']['phase'] == 'Running':
                     count += 1
             if count == 3:

zuul_operator/utils.py

@@ -22,7 +22,6 @@ import jinja2
 import kubernetes
 from kubernetes.client import Configuration
 from kubernetes.client.api import core_v1_api
-from kubernetes.client.rest import ApiException
 from kubernetes.stream import stream
 
 from . import objects

zuul_operator/zookeeper.py

@@ -13,9 +13,6 @@
 # under the License.
 
 import time
-import base64
-
-import pykube
 
 from . import objects
 from . import utils

zuul_operator/zuul.py

@@ -267,7 +267,8 @@ class Zuul:
 
         # Shard the config so we can create a deployment + secret for
         # each provider.
-        nodepool_yaml = yaml.safe_load(base64.b64decode(obj.obj['data']['nodepool.yaml']))
+        nodepool_yaml = yaml.safe_load(base64.b64decode(
+            obj.obj['data']['nodepool.yaml']))
 
         nodepool_yaml['zookeeper-servers'] = self.parse_zk_string(
             self.spec['zookeeper']['hosts'])
@@ -321,7 +322,8 @@ class Zuul:
         for unused_provider in old_providers - new_providers:
             self.log.info("Deleting unused provider %s", unused_provider)
 
-            deployment_name = f"nodepool-launcher-{self.name}-{unused_provider}"
+            deployment_name = "nodepool-launcher-"\
+                f"{self.name}-{unused_provider}"
             secret_name = f"nodepool-config-{self.name}-{unused_provider}"
 
             try:
@@ -339,7 +341,8 @@ class Zuul:
                 pass
 
     def write_registry_conf(self):
-        config_secret = self.spec['registry'].get('config', {}).get('secretName')
+        config_secret = self.spec['registry'].get('config', {}).\
+            get('secretName')
         if not config_secret:
             raise kopf.PermanentError("No registry config secret found")
 
@@ -435,7 +438,8 @@ class Zuul:
                 str(timeout),
                 '/bin/sh',
                 '-c',
-                f'while !( echo -n "{expected}" | sha256sum -c - ); do sleep {delay}; done'
+                f'while !( echo -n "{expected}" | sha256sum -c - );'
+                f'do sleep {delay}; done'
             ]
             resp = utils.pod_exec(self.namespace, obj.name, command)
             self.log.debug("Response: %s", resp)