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authorRodolfo Carvalho <rhcarvalho@gmail.com>2017-01-30 18:29:06 +0100
committerRodolfo Carvalho <rhcarvalho@gmail.com>2017-02-10 14:46:40 +0100
commitbb38413fcec7fb2640939782d57e494b40e3b41e (patch)
tree89e589859935e059d899a8bc357206c6891901b2
parentc6ef283bbcd1ab31934fb245d0c8ffacfd05bce1 (diff)
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Replace multi-role checks with action plugin
This approach should make it easier to add new checks without having to write lots of YAML and doing things against Ansible (e.g. ignore_errors). A single action plugin determines what checks to run per each host, including arguments to the check. A check is implemented as a class with a run method, with the same signature as an action plugin and module, and is normally backed by a regular Ansible module. Each check is implemented as a separate Python file. This allows whoever adds a new check to focus solely in a single Python module, and potentially an Ansible module within library/ too. All checks are automatically loaded, and only active checks that are requested by the playbook get executed.
-rw-r--r--playbooks/byo/openshift-preflight/check.yml41
-rw-r--r--roles/openshift_health_checker/README.md43
-rw-r--r--roles/openshift_health_checker/action_plugins/openshift_health_check.py95
-rw-r--r--roles/openshift_health_checker/callback_plugins/zz_failure_summary.py (renamed from roles/openshift_preflight/verify_status/callback_plugins/zz_failure_summary.py)4
-rwxr-xr-xroles/openshift_health_checker/library/aos_version.py (renamed from roles/openshift_preflight/base/library/aos_version.py)0
-rwxr-xr-xroles/openshift_health_checker/library/check_yum_update.py (renamed from roles/openshift_preflight/base/library/check_yum_update.py)0
-rw-r--r--roles/openshift_health_checker/meta/main.yml (renamed from roles/openshift_preflight/init/meta/main.yml)0
-rw-r--r--roles/openshift_health_checker/openshift_checks/__init__.py57
-rw-r--r--roles/openshift_health_checker/openshift_checks/mixins.py24
-rw-r--r--roles/openshift_health_checker/openshift_checks/package_availability.py69
-rw-r--r--roles/openshift_health_checker/openshift_checks/package_update.py13
-rw-r--r--roles/openshift_health_checker/openshift_checks/package_version.py25
-rw-r--r--roles/openshift_preflight/README.md52
-rw-r--r--roles/openshift_preflight/common/meta/main.yml3
-rw-r--r--roles/openshift_preflight/common/tasks/main.yml21
-rw-r--r--roles/openshift_preflight/init/tasks/main.yml4
-rw-r--r--roles/openshift_preflight/masters/meta/main.yml3
-rw-r--r--roles/openshift_preflight/masters/tasks/main.yml31
-rw-r--r--roles/openshift_preflight/nodes/meta/main.yml3
-rw-r--r--roles/openshift_preflight/nodes/tasks/main.yml41
-rw-r--r--roles/openshift_preflight/verify_status/tasks/main.yml8
21 files changed, 342 insertions, 195 deletions
diff --git a/playbooks/byo/openshift-preflight/check.yml b/playbooks/byo/openshift-preflight/check.yml
index 32673d01d..935531e02 100644
--- a/playbooks/byo/openshift-preflight/check.yml
+++ b/playbooks/byo/openshift-preflight/check.yml
@@ -1,31 +1,14 @@
---
- hosts: OSEv3
- roles:
- - openshift_preflight/init
-
-- hosts: OSEv3
- name: checks that apply to all hosts
- gather_facts: no
- ignore_errors: yes
- roles:
- - openshift_preflight/common
-
-- hosts: masters
- name: checks that apply to masters
- gather_facts: no
- ignore_errors: yes
- roles:
- - openshift_preflight/masters
-
-- hosts: nodes
- name: checks that apply to nodes
- gather_facts: no
- ignore_errors: yes
- roles:
- - openshift_preflight/nodes
-
-- hosts: OSEv3
- name: verify check results
- gather_facts: no
- roles:
- - openshift_preflight/verify_status
+ name: run OpenShift health checks
+ roles:
+ - openshift_health_checker
+ post_tasks:
+ # NOTE: we need to use the old "action: name" syntax until
+ # https://github.com/ansible/ansible/issues/20513 is fixed.
+ - action: openshift_health_check
+ args:
+ checks:
+ - package_availability
+ - package_update
+ - package_version
diff --git a/roles/openshift_health_checker/README.md b/roles/openshift_health_checker/README.md
new file mode 100644
index 000000000..745e45b50
--- /dev/null
+++ b/roles/openshift_health_checker/README.md
@@ -0,0 +1,43 @@
+OpenShift Health Checker
+========================
+
+This role detects common problems with OpenShift installations or with
+environments prior to install.
+
+Requirements
+------------
+
+* Ansible 2.2+
+
+Role Variables
+--------------
+
+None
+
+Dependencies
+------------
+
+- openshift_facts
+
+Example Playbook
+----------------
+
+```yaml
+---
+- hosts: OSEv3
+ name: run OpenShift health checks
+ roles:
+ - openshift_health_checker
+ post_tasks:
+ - action: openshift_health_check
+```
+
+License
+-------
+
+Apache License Version 2.0
+
+Author Information
+------------------
+
+Customer Success team (dev@lists.openshift.redhat.com)
diff --git a/roles/openshift_health_checker/action_plugins/openshift_health_check.py b/roles/openshift_health_checker/action_plugins/openshift_health_check.py
new file mode 100644
index 000000000..36defde0a
--- /dev/null
+++ b/roles/openshift_health_checker/action_plugins/openshift_health_check.py
@@ -0,0 +1,95 @@
+"""
+Ansible action plugin to execute health checks in OpenShift clusters.
+"""
+# pylint: disable=wrong-import-position,missing-docstring,invalid-name
+import sys
+import os
+
+try:
+ from __main__ import display
+except ImportError:
+ from ansible.utils.display import Display
+ display = Display()
+
+from ansible.plugins.action import ActionBase
+
+# Augment sys.path so that we can import checks from a directory relative to
+# this callback plugin.
+sys.path.insert(1, os.path.dirname(os.path.dirname(__file__)))
+
+from openshift_checks import OpenShiftCheck, OpenShiftCheckException # noqa: E402
+
+
+class ActionModule(ActionBase):
+
+ def run(self, tmp=None, task_vars=None):
+ result = super(ActionModule, self).run(tmp, task_vars)
+
+ if task_vars is None:
+ task_vars = {}
+
+ if "openshift" not in task_vars:
+ result["failed"] = True
+ result["msg"] = "'openshift' is undefined, did 'openshift_facts' run?"
+ return result
+
+ try:
+ known_checks = self.load_known_checks()
+ except OpenShiftCheckException as e:
+ result["failed"] = True
+ result["msg"] = str(e)
+ return result
+
+ args = self._task.args
+ requested_checks = set(args.get("checks", []))
+
+ unknown_checks = requested_checks - set(known_checks)
+ if unknown_checks:
+ result["failed"] = True
+ result["msg"] = (
+ "One or more checks are unknown: {}. "
+ "Make sure there is no typo in the playbook and no files are missing."
+ ).format(", ".join(unknown_checks))
+ return result
+
+ result["checks"] = check_results = {}
+
+ for check_name in requested_checks & set(known_checks):
+ display.banner("CHECK [{} : {}]".format(check_name, task_vars["ansible_host"]))
+ check = known_checks[check_name]
+
+ if check.is_active(task_vars):
+ try:
+ r = check.run(tmp, task_vars)
+ except OpenShiftCheckException as e:
+ r = {}
+ r["failed"] = True
+ r["msg"] = str(e)
+ else:
+ r = {"skipped": True}
+
+ check_results[check_name] = r
+
+ if r.get("failed", False):
+ result["failed"] = True
+ result["msg"] = "One or more checks failed"
+
+ return result
+
+ def load_known_checks(self):
+ known_checks = {}
+
+ known_check_classes = set(cls for cls in OpenShiftCheck.subclasses())
+
+ for cls in known_check_classes:
+ check_name = cls.name
+ if check_name in known_checks:
+ other_cls = known_checks[check_name].__class__
+ raise OpenShiftCheckException(
+ "non-unique check name '{}' in: '{}.{}' and '{}.{}'".format(
+ check_name,
+ cls.__module__, cls.__name__,
+ other_cls.__module__, other_cls.__name__))
+ known_checks[check_name] = cls(module_executor=self._execute_module)
+
+ return known_checks
diff --git a/roles/openshift_preflight/verify_status/callback_plugins/zz_failure_summary.py b/roles/openshift_health_checker/callback_plugins/zz_failure_summary.py
index 180ed8d8f..8caefab15 100644
--- a/roles/openshift_preflight/verify_status/callback_plugins/zz_failure_summary.py
+++ b/roles/openshift_health_checker/callback_plugins/zz_failure_summary.py
@@ -3,6 +3,8 @@
Ansible callback plugin.
'''
+from pprint import pformat
+
from ansible.plugins.callback import CallbackBase
from ansible import constants as C
from ansible.utils.color import stringc
@@ -79,6 +81,8 @@ def _format_failure(failure):
(u'Task', task),
(u'Message', stringc(msg, C.COLOR_ERROR)),
)
+ if 'checks' in result._result:
+ rows += ((u'Details', stringc(pformat(result._result['checks']), C.COLOR_ERROR)),)
row_format = '{:10}{}'
return [row_format.format(header + u':', body) for header, body in rows]
diff --git a/roles/openshift_preflight/base/library/aos_version.py b/roles/openshift_health_checker/library/aos_version.py
index 37c8b483c..37c8b483c 100755
--- a/roles/openshift_preflight/base/library/aos_version.py
+++ b/roles/openshift_health_checker/library/aos_version.py
diff --git a/roles/openshift_preflight/base/library/check_yum_update.py b/roles/openshift_health_checker/library/check_yum_update.py
index 9bc14fd47..9bc14fd47 100755
--- a/roles/openshift_preflight/base/library/check_yum_update.py
+++ b/roles/openshift_health_checker/library/check_yum_update.py
diff --git a/roles/openshift_preflight/init/meta/main.yml b/roles/openshift_health_checker/meta/main.yml
index 0bbeadd34..0bbeadd34 100644
--- a/roles/openshift_preflight/init/meta/main.yml
+++ b/roles/openshift_health_checker/meta/main.yml
diff --git a/roles/openshift_health_checker/openshift_checks/__init__.py b/roles/openshift_health_checker/openshift_checks/__init__.py
new file mode 100644
index 000000000..d893ba591
--- /dev/null
+++ b/roles/openshift_health_checker/openshift_checks/__init__.py
@@ -0,0 +1,57 @@
+"""
+Health checks for OpenShift clusters.
+"""
+
+import os
+from abc import ABCMeta, abstractmethod, abstractproperty
+from importlib import import_module
+
+import six
+
+
+class OpenShiftCheckException(Exception):
+ """Raised when a check cannot proceed."""
+ pass
+
+
+@six.add_metaclass(ABCMeta)
+class OpenShiftCheck(object):
+ """A base class for defining checks for an OpenShift cluster environment."""
+
+ def __init__(self, module_executor):
+ self.module_executor = module_executor
+
+ @abstractproperty
+ def name(self):
+ """The name of this check, usually derived from the class name."""
+ return "openshift_check"
+
+ @classmethod
+ def is_active(cls, task_vars): # pylint: disable=unused-argument
+ """Returns true if this check applies to the ansible-playbook run."""
+ return True
+
+ @abstractmethod
+ def run(self, tmp, task_vars):
+ """Executes a check, normally implemented as a module."""
+ return {}
+
+ @classmethod
+ def subclasses(cls):
+ """Returns a generator of subclasses of this class and its subclasses."""
+ for subclass in cls.__subclasses__(): # pylint: disable=no-member
+ yield subclass
+ for subclass in subclass.subclasses():
+ yield subclass
+
+
+# Dynamically import all submodules for the side effect of loading checks.
+
+EXCLUDES = (
+ "__init__.py",
+ "mixins.py",
+)
+
+for name in os.listdir(os.path.dirname(__file__)):
+ if name.endswith(".py") and name not in EXCLUDES:
+ import_module(__package__ + "." + name[:-3])
diff --git a/roles/openshift_health_checker/openshift_checks/mixins.py b/roles/openshift_health_checker/openshift_checks/mixins.py
new file mode 100644
index 000000000..4e0415944
--- /dev/null
+++ b/roles/openshift_health_checker/openshift_checks/mixins.py
@@ -0,0 +1,24 @@
+# pylint: disable=missing-docstring
+from openshift_checks import OpenShiftCheckException
+
+
+class NotContainerized(object):
+ """Mixin for checks that are only active when not in containerized mode."""
+
+ @classmethod
+ def is_active(cls, task_vars):
+ return (
+ # This mixin is meant to be used with subclasses of
+ # OpenShiftCheck. Pylint disables this by default on mixins,
+ # though it relies on the class name ending in 'mixin'.
+ # pylint: disable=no-member
+ super(NotContainerized, cls).is_active(task_vars) and
+ not cls.is_containerized(task_vars)
+ )
+
+ @staticmethod
+ def is_containerized(task_vars):
+ try:
+ return task_vars["openshift"]["common"]["is_containerized"]
+ except (KeyError, TypeError):
+ raise OpenShiftCheckException("'openshift.common.is_containerized' is undefined")
diff --git a/roles/openshift_health_checker/openshift_checks/package_availability.py b/roles/openshift_health_checker/openshift_checks/package_availability.py
new file mode 100644
index 000000000..4260cbf7c
--- /dev/null
+++ b/roles/openshift_health_checker/openshift_checks/package_availability.py
@@ -0,0 +1,69 @@
+# pylint: disable=missing-docstring
+from openshift_checks import OpenShiftCheck, OpenShiftCheckException
+from openshift_checks.mixins import NotContainerized
+
+
+class PackageAvailability(NotContainerized, OpenShiftCheck):
+ """Check that required RPM packages are available."""
+
+ name = "package_availability"
+
+ def run(self, tmp, task_vars):
+ try:
+ rpm_prefix = task_vars["openshift"]["common"]["service_type"]
+ except (KeyError, TypeError):
+ raise OpenShiftCheckException("'openshift.common.service_type' is undefined")
+
+ group_names = task_vars.get("group_names", [])
+
+ packages = set()
+
+ if "masters" in group_names:
+ packages.update(self.master_packages(rpm_prefix))
+ if "nodes" in group_names:
+ packages.update(self.node_packages(rpm_prefix))
+
+ args = {"packages": sorted(set(packages))}
+ return self.module_executor("check_yum_update", args, tmp, task_vars)
+
+ @staticmethod
+ def master_packages(rpm_prefix):
+ return [
+ "{rpm_prefix}".format(rpm_prefix=rpm_prefix),
+ "{rpm_prefix}-clients".format(rpm_prefix=rpm_prefix),
+ "{rpm_prefix}-master".format(rpm_prefix=rpm_prefix),
+ "bash-completion",
+ "cockpit-bridge",
+ "cockpit-docker",
+ "cockpit-kubernetes",
+ "cockpit-shell",
+ "cockpit-ws",
+ "etcd",
+ "httpd-tools",
+ ]
+
+ @staticmethod
+ def node_packages(rpm_prefix):
+ return [
+ "{rpm_prefix}".format(rpm_prefix=rpm_prefix),
+ "{rpm_prefix}-node".format(rpm_prefix=rpm_prefix),
+ "{rpm_prefix}-sdn-ovs".format(rpm_prefix=rpm_prefix),
+ "bind",
+ "ceph-common",
+ "dnsmasq",
+ "docker",
+ "firewalld",
+ "flannel",
+ "glusterfs-fuse",
+ "iptables-services",
+ "iptables",
+ "iscsi-initiator-utils",
+ "libselinux-python",
+ "nfs-utils",
+ "ntp",
+ "openssl",
+ "pyparted",
+ "python-httplib2",
+ "PyYAML",
+ "yum-utils",
+ ]
diff --git a/roles/openshift_health_checker/openshift_checks/package_update.py b/roles/openshift_health_checker/openshift_checks/package_update.py
new file mode 100644
index 000000000..316a776f5
--- /dev/null
+++ b/roles/openshift_health_checker/openshift_checks/package_update.py
@@ -0,0 +1,13 @@
+# pylint: disable=missing-docstring
+from openshift_checks import OpenShiftCheck
+from openshift_checks.mixins import NotContainerized
+
+
+class PackageUpdate(NotContainerized, OpenShiftCheck):
+ """Check that there are no conflicts in RPM packages."""
+
+ name = "package_update"
+
+ def run(self, tmp, task_vars):
+ args = {"packages": []}
+ return self.module_executor("check_yum_update", args, tmp, task_vars)
diff --git a/roles/openshift_health_checker/openshift_checks/package_version.py b/roles/openshift_health_checker/openshift_checks/package_version.py
new file mode 100644
index 000000000..a473119f3
--- /dev/null
+++ b/roles/openshift_health_checker/openshift_checks/package_version.py
@@ -0,0 +1,25 @@
+# pylint: disable=missing-docstring
+from openshift_checks import OpenShiftCheck, OpenShiftCheckException
+from openshift_checks.mixins import NotContainerized
+
+
+class PackageVersion(NotContainerized, OpenShiftCheck):
+ """Check that available RPM packages match the required versions."""
+
+ name = "package_version"
+
+ @classmethod
+ def is_active(cls, task_vars):
+ return (
+ super(PackageVersion, cls).is_active(task_vars)
+ and task_vars.get("deployment_type") == "openshift-enterprise"
+ )
+
+ def run(self, tmp, task_vars):
+ try:
+ openshift_release = task_vars["openshift_release"]
+ except (KeyError, TypeError):
+ raise OpenShiftCheckException("'openshift_release' is undefined")
+
+ args = {"version": openshift_release}
+ return self.module_executor("aos_version", args, tmp, task_vars)
diff --git a/roles/openshift_preflight/README.md b/roles/openshift_preflight/README.md
deleted file mode 100644
index b6d3542d3..000000000
--- a/roles/openshift_preflight/README.md
+++ /dev/null
@@ -1,52 +0,0 @@
-OpenShift Preflight Checks
-==========================
-
-This role detects common problems prior to installing OpenShift.
-
-Requirements
-------------
-
-* Ansible 2.2+
-
-Role Variables
---------------
-
-None
-
-Dependencies
-------------
-
-None
-
-Example Playbook
-----------------
-
-```yaml
----
-- hosts: OSEv3
- roles:
- - openshift_preflight/init
-
-- hosts: OSEv3
- name: checks that apply to all hosts
- gather_facts: no
- ignore_errors: yes
- roles:
- - openshift_preflight/common
-
-- hosts: OSEv3
- name: verify check results
- gather_facts: no
- roles:
- - openshift_preflight/verify_status
-```
-
-License
--------
-
-Apache License Version 2.0
-
-Author Information
-------------------
-
-Customer Success team (dev@lists.openshift.redhat.com)
diff --git a/roles/openshift_preflight/common/meta/main.yml b/roles/openshift_preflight/common/meta/main.yml
deleted file mode 100644
index 6f23cbf3b..000000000
--- a/roles/openshift_preflight/common/meta/main.yml
+++ /dev/null
@@ -1,3 +0,0 @@
----
-dependencies:
- - role: openshift_preflight/base
diff --git a/roles/openshift_preflight/common/tasks/main.yml b/roles/openshift_preflight/common/tasks/main.yml
deleted file mode 100644
index f1a4a160e..000000000
--- a/roles/openshift_preflight/common/tasks/main.yml
+++ /dev/null
@@ -1,21 +0,0 @@
----
-# check content available on all hosts
-- when: not openshift.common.is_containerized | bool
- block:
-
- - name: determine if yum update will work
- action: check_yum_update
- register: r
-
- - set_fact:
- oo_preflight_check_results: "{{ oo_preflight_check_results + [r|combine({'_task': 'determine if yum update will work'})] }}"
-
- - name: determine if expected version matches what is available
- aos_version:
- version: "{{ openshift_release }}"
- when:
- - deployment_type == "openshift-enterprise"
- register: r
-
- - set_fact:
- oo_preflight_check_results: "{{ oo_preflight_check_results + [r|combine({'_task': 'determine if expected version matches what is available'})] }}"
diff --git a/roles/openshift_preflight/init/tasks/main.yml b/roles/openshift_preflight/init/tasks/main.yml
deleted file mode 100644
index bf2d82196..000000000
--- a/roles/openshift_preflight/init/tasks/main.yml
+++ /dev/null
@@ -1,4 +0,0 @@
----
-- name: set common variables
- set_fact:
- oo_preflight_check_results: "{{ oo_preflight_check_results | default([]) }}"
diff --git a/roles/openshift_preflight/masters/meta/main.yml b/roles/openshift_preflight/masters/meta/main.yml
deleted file mode 100644
index 6f23cbf3b..000000000
--- a/roles/openshift_preflight/masters/meta/main.yml
+++ /dev/null
@@ -1,3 +0,0 @@
----
-dependencies:
- - role: openshift_preflight/base
diff --git a/roles/openshift_preflight/masters/tasks/main.yml b/roles/openshift_preflight/masters/tasks/main.yml
deleted file mode 100644
index 35fb1e3ca..000000000
--- a/roles/openshift_preflight/masters/tasks/main.yml
+++ /dev/null
@@ -1,31 +0,0 @@
----
-# determine if yum install of master pkgs will work
-- when: not openshift.common.is_containerized | bool
- block:
-
- - name: main master packages availability
- check_yum_update:
- packages:
- - "{{ openshift.common.service_type }}"
- - "{{ openshift.common.service_type }}-clients"
- - "{{ openshift.common.service_type }}-master"
- register: r
-
- - set_fact:
- oo_preflight_check_results: "{{ oo_preflight_check_results + [r|combine({'_task': 'main master packages availability'})] }}"
-
- - name: other master packages availability
- check_yum_update:
- packages:
- - etcd
- - bash-completion
- - cockpit-bridge
- - cockpit-docker
- - cockpit-kubernetes
- - cockpit-shell
- - cockpit-ws
- - httpd-tools
- register: r
-
- - set_fact:
- oo_preflight_check_results: "{{ oo_preflight_check_results + [r|combine({'_task': 'other master packages availability'})] }}"
diff --git a/roles/openshift_preflight/nodes/meta/main.yml b/roles/openshift_preflight/nodes/meta/main.yml
deleted file mode 100644
index 6f23cbf3b..000000000
--- a/roles/openshift_preflight/nodes/meta/main.yml
+++ /dev/null
@@ -1,3 +0,0 @@
----
-dependencies:
- - role: openshift_preflight/base
diff --git a/roles/openshift_preflight/nodes/tasks/main.yml b/roles/openshift_preflight/nodes/tasks/main.yml
deleted file mode 100644
index a10e69024..000000000
--- a/roles/openshift_preflight/nodes/tasks/main.yml
+++ /dev/null
@@ -1,41 +0,0 @@
----
-# determine if yum install of node pkgs will work
-- when: not openshift.common.is_containerized | bool
- block:
-
- - name: main node packages availability
- check_yum_update:
- packages:
- - "{{ openshift.common.service_type }}"
- - "{{ openshift.common.service_type }}-node"
- - "{{ openshift.common.service_type }}-sdn-ovs"
- register: r
-
- - set_fact:
- oo_preflight_check_results: "{{ oo_preflight_check_results + [r|combine({'_task': 'main node packages availability'})] }}"
-
- - name: other node packages availability
- check_yum_update:
- packages:
- - docker
- - PyYAML
- - firewalld
- - iptables
- - iptables-services
- - nfs-utils
- - ntp
- - yum-utils
- - dnsmasq
- - libselinux-python
- - ceph-common
- - glusterfs-fuse
- - iscsi-initiator-utils
- - pyparted
- - python-httplib2
- - openssl
- - flannel
- - bind
- register: r
-
- - set_fact:
- oo_preflight_check_results: "{{ oo_preflight_check_results + [r|combine({'_task': 'other node packages availability'})] }}"
diff --git a/roles/openshift_preflight/verify_status/tasks/main.yml b/roles/openshift_preflight/verify_status/tasks/main.yml
deleted file mode 100644
index 36ccf648a..000000000
--- a/roles/openshift_preflight/verify_status/tasks/main.yml
+++ /dev/null
@@ -1,8 +0,0 @@
----
-- name: find check failures
- set_fact:
- oo_preflight_check_failures: "{{ oo_preflight_check_results | select('failed', 'equalto', True) | list }}"
-
-- name: ensure all checks succeed
- action: fail
- when: oo_preflight_check_failures