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authorEric Wolinetz <ewolinet@redhat.com>2017-10-25 20:45:34 -0500
committerEric Wolinetz <ewolinet@redhat.com>2018-01-02 11:16:04 -0600
commit8cb27ae800df71ee816852df56cd2c861a0f0a0a (patch)
tree9a3f000d6bb886296912df6de0ececdfe7783a53 /roles/openshift_logging
parent332764e4541d8c922f2589a533bb56b2a2419ac1 (diff)
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Updating logging_facts to be able to pull values from config maps yaml files, use diffs to keep custom changes, white list certain settings when creating diffs
Diffstat (limited to 'roles/openshift_logging')
-rw-r--r--roles/openshift_logging/filter_plugins/openshift_logging.py25
-rw-r--r--roles/openshift_logging/library/logging_patch.py112
-rw-r--r--roles/openshift_logging/library/openshift_logging_facts.py13
-rw-r--r--roles/openshift_logging/tasks/install_logging.yaml3
-rw-r--r--roles/openshift_logging/tasks/patch_configmap_file.yaml35
-rw-r--r--roles/openshift_logging/tasks/patch_configmap_files.yaml31
-rw-r--r--roles/openshift_logging/tasks/set_defaults_from_current.yml34
7 files changed, 251 insertions, 2 deletions
diff --git a/roles/openshift_logging/filter_plugins/openshift_logging.py b/roles/openshift_logging/filter_plugins/openshift_logging.py
index e1a5ea726..ba412b5a6 100644
--- a/roles/openshift_logging/filter_plugins/openshift_logging.py
+++ b/roles/openshift_logging/filter_plugins/openshift_logging.py
@@ -102,6 +102,28 @@ def serviceaccount_namespace(qualified_sa, default=None):
return seg[-1]
+def flatten_dict(data, parent_key=None):
+ """ This filter plugin will flatten a dict and its sublists into a single dict
+ """
+ if not isinstance(data, dict):
+ raise RuntimeError("flatten_dict failed, expects to flatten a dict")
+
+ merged = dict()
+
+ for key in data:
+ if parent_key is not None:
+ insert_key = '.'.join((parent_key, key))
+ else:
+ insert_key = key
+
+ if isinstance(data[key], dict):
+ merged.update(flatten_dict(data[key], insert_key))
+ else:
+ merged[insert_key] = data[key]
+
+ return merged
+
+
# pylint: disable=too-few-public-methods
class FilterModule(object):
''' OpenShift Logging Filters '''
@@ -117,5 +139,6 @@ class FilterModule(object):
'es_storage': es_storage,
'serviceaccount_name': serviceaccount_name,
'serviceaccount_namespace': serviceaccount_namespace,
- 'walk': walk
+ 'walk': walk,
+ "flatten_dict": flatten_dict
}
diff --git a/roles/openshift_logging/library/logging_patch.py b/roles/openshift_logging/library/logging_patch.py
new file mode 100644
index 000000000..d2c0bc456
--- /dev/null
+++ b/roles/openshift_logging/library/logging_patch.py
@@ -0,0 +1,112 @@
+#!/usr/bin/python
+
+""" Ansible module to help with creating context patch file with whitelisting for logging """
+
+import difflib
+import re
+
+from ansible.module_utils.basic import AnsibleModule
+
+
+DOCUMENTATION = '''
+---
+module: logging_patch
+
+short_description: This will create a context patch file while giving ability
+ to whitelist some lines (excluding them from comparison)
+
+description:
+ - "To create configmap patches for logging"
+
+author:
+ - Eric Wolinetz ewolinet@redhat.com
+'''
+
+
+EXAMPLES = '''
+- logging_patch:
+ original_file: "{{ tempdir }}/current.yml"
+ new_file: "{{ configmap_new_file }}"
+ whitelist: "{{ configmap_protected_lines | default([]) }}"
+
+'''
+
+
+def account_for_whitelist(file_contents, white_list=None):
+ """ This method will remove lines that contain whitelist values from the content
+ of the file so that we aren't build a patch based on that line
+
+ Usage:
+
+ for file_contents:
+
+ index:
+ number_of_shards: {{ es_number_of_shards | default ('1') }}
+ number_of_replicas: {{ es_number_of_replicas | default ('0') }}
+ unassigned.node_left.delayed_timeout: 2m
+ translog:
+ flush_threshold_size: 256mb
+ flush_threshold_period: 5m
+
+
+ and white_list:
+
+ ['number_of_shards', 'number_of_replicas']
+
+
+ We would end up with:
+
+ index:
+ unassigned.node_left.delayed_timeout: 2m
+ translog:
+ flush_threshold_size: 256mb
+ flush_threshold_period: 5m
+
+ """
+
+ for line in white_list:
+ file_contents = re.sub(r".*%s:.*\n" % line, "", file_contents)
+
+ return file_contents
+
+
+def run_module():
+ """ The body of the module, we check if the variable name specified as the value
+ for the key is defined. If it is then we use that value as for the original key """
+
+ module = AnsibleModule(
+ argument_spec=dict(
+ original_file=dict(type='str', required=True),
+ new_file=dict(type='str', required=True),
+ whitelist=dict(required=False, type='list', default=[])
+ ),
+ supports_check_mode=True
+ )
+
+ original_fh = open(module.params['original_file'], "r")
+ original_contents = original_fh.read()
+ original_fh.close()
+
+ original_contents = account_for_whitelist(original_contents, module.params['whitelist'])
+
+ new_fh = open(module.params['new_file'], "r")
+ new_contents = new_fh.read()
+ new_fh.close()
+
+ new_contents = account_for_whitelist(new_contents, module.params['whitelist'])
+
+ uni_diff = difflib.unified_diff(new_contents.splitlines(),
+ original_contents.splitlines(),
+ lineterm='')
+
+ return module.exit_json(changed=False, # noqa: F405
+ raw_patch="\n".join(uni_diff))
+
+
+def main():
+ """ main """
+ run_module()
+
+
+if __name__ == '__main__':
+ main()
diff --git a/roles/openshift_logging/library/openshift_logging_facts.py b/roles/openshift_logging/library/openshift_logging_facts.py
index 98d0d1c4f..302a9b4c9 100644
--- a/roles/openshift_logging/library/openshift_logging_facts.py
+++ b/roles/openshift_logging/library/openshift_logging_facts.py
@@ -204,6 +204,14 @@ class OpenshiftLoggingFacts(OCBaseCommand):
if comp is not None:
self.add_facts_for(comp, "services", name, dict())
+ # pylint: disable=too-many-arguments
+ def facts_from_configmap(self, comp, kind, name, config_key, yaml_file=None):
+ '''Extracts facts in logging namespace from configmap'''
+ if yaml_file is not None:
+ config_facts = yaml.load(yaml_file)
+ self.facts[comp][kind][name][config_key] = config_facts
+ self.facts[comp][kind][name]["raw"] = yaml_file
+
def facts_for_configmaps(self, namespace):
''' Gathers facts for configmaps in logging namespace '''
self.default_keys_for("configmaps")
@@ -214,7 +222,10 @@ class OpenshiftLoggingFacts(OCBaseCommand):
name = item["metadata"]["name"]
comp = self.comp(name)
if comp is not None:
- self.add_facts_for(comp, "configmaps", name, item["data"])
+ self.add_facts_for(comp, "configmaps", name, dict(item["data"]))
+ if comp in ["elasticsearch", "elasticsearch_ops"]:
+ for config_key in item["data"]:
+ self.facts_from_configmap(comp, "configmaps", name, config_key, item["data"][config_key])
def facts_for_oauthclients(self, namespace):
''' Gathers facts for oauthclients used with logging '''
diff --git a/roles/openshift_logging/tasks/install_logging.yaml b/roles/openshift_logging/tasks/install_logging.yaml
index 11f59652c..913478027 100644
--- a/roles/openshift_logging/tasks/install_logging.yaml
+++ b/roles/openshift_logging/tasks/install_logging.yaml
@@ -4,6 +4,9 @@
oc_bin: "{{openshift_client_binary}}"
openshift_logging_namespace: "{{openshift_logging_namespace}}"
+## This is include vs import because we need access to group/inventory variables
+- include_tasks: set_defaults_from_current.yml
+
- name: Set logging project
oc_project:
state: present
diff --git a/roles/openshift_logging/tasks/patch_configmap_file.yaml b/roles/openshift_logging/tasks/patch_configmap_file.yaml
new file mode 100644
index 000000000..30087fe6a
--- /dev/null
+++ b/roles/openshift_logging/tasks/patch_configmap_file.yaml
@@ -0,0 +1,35 @@
+---
+## The purpose of this task file is to get a patch that is based on the diff
+## between configmap_current_file and configmap_new_file. The module
+## logging_patch takes the paths of two files to compare and also a list of
+## variables whose line we exclude from the diffs.
+## We then patch the new configmap file so that we can build a configmap
+## using that file later. We then use oc apply to idempotenly modify any
+## existing configmap.
+
+## The following variables are expected to be provided when including this task:
+# __configmap_output -- This is provided to us from patch_configmap_files.yaml
+# it is a dict of the configmap where configmap_current_file exists
+# configmap_current_file -- The name of the data file in the __configmap_output
+# configmap_new_file -- The path to the file that we intend to oc apply later
+# we apply our generated patch to this file.
+# configmap_protected_lines -- The list of variables to exclude from the diff
+
+- copy:
+ content: "{{ __configmap_output.results.results[0]['data'][configmap_current_file] }}"
+ dest: "{{ tempdir }}/current.yml"
+
+- logging_patch:
+ original_file: "{{ tempdir }}/current.yml"
+ new_file: "{{ configmap_new_file }}"
+ whitelist: "{{ configmap_protected_lines | default([]) }}"
+ register: patch_output
+
+- copy:
+ content: "{{ patch_output.raw_patch }}\n"
+ dest: "{{ tempdir }}/patch.patch"
+ when: patch_output.raw_patch | length > 0
+
+- command: >
+ patch --force --quiet -u "{{ configmap_new_file }}" "{{ tempdir }}/patch.patch"
+ when: patch_output.raw_patch | length > 0
diff --git a/roles/openshift_logging/tasks/patch_configmap_files.yaml b/roles/openshift_logging/tasks/patch_configmap_files.yaml
new file mode 100644
index 000000000..74a9cc287
--- /dev/null
+++ b/roles/openshift_logging/tasks/patch_configmap_files.yaml
@@ -0,0 +1,31 @@
+---
+## The purpose of this task file is to take in a list of configmap files provided
+## in the variable configmap_file_names, which correspond to the data sections
+## within a configmap. We iterate over each of these files and create a patch
+## from the diff between current_file and new_file to try to maintain any custom
+## changes that a user may have made to a currently deployed configmap while
+## trying to idempotently update with any role provided files.
+
+## The following variables are expected to be provided when including this task:
+# configmap_name -- This is the name of the configmap that the files exist in
+# configmap_namespace -- The namespace that the configmap lives in
+# configmap_file_names -- This is expected to be passed in as a dict
+# current_file -- The name of the data entry within the configmap
+# new_file -- The file path to the file we are comparing to current_file
+# protected_lines -- List of variables whose line will be excluded when creating a diff
+
+- oc_configmap:
+ name: "{{ configmap_name }}"
+ state: list
+ namespace: "{{ configmap_namespace }}"
+ register: __configmap_output
+
+- when: __configmap_output.results.stderr is undefined
+ include_tasks: patch_configmap_file.yaml
+ vars:
+ configmap_current_file: "{{ configmap_files.current_file }}"
+ configmap_new_file: "{{ configmap_files.new_file }}"
+ configmap_protected_lines: "{{ configmap_files.protected_lines | default([]) }}"
+ with_items: "{{ configmap_file_names }}"
+ loop_control:
+ loop_var: configmap_files
diff --git a/roles/openshift_logging/tasks/set_defaults_from_current.yml b/roles/openshift_logging/tasks/set_defaults_from_current.yml
new file mode 100644
index 000000000..dde362abe
--- /dev/null
+++ b/roles/openshift_logging/tasks/set_defaults_from_current.yml
@@ -0,0 +1,34 @@
+---
+
+## We are pulling default values from configmaps if they exist already
+## Using conditional_set_fact allows us to set the value of a variable based on
+## the value of another one, if it is already defined. Else we don't set the
+## left hand side (it stays undefined as well).
+
+## conditional_set_fact allows us to specify a fact source, so first we try to
+## set variables in the logging-elasticsearch & logging-elasticsearch-ops configmaps
+## afterwards we set the value of the variable based on the value in the inventory
+## but fall back to using the value from a configmap as a default. If neither is set
+## then the variable remains undefined and the role default will be used.
+
+- conditional_set_fact:
+ facts: "{{ openshift_logging_facts['elasticsearch']['configmaps']['logging-elasticsearch']['elasticsearch.yml'] | flatten_dict }}"
+ vars:
+ __openshift_logging_es_number_of_shards: index.number_of_shards
+ __openshift_logging_es_number_of_replicas: index.number_of_replicas
+ when: openshift_logging_facts['elasticsearch']['configmaps']['logging-elasticsearch'] is defined
+
+- conditional_set_fact:
+ facts: "{{ openshift_logging_facts['elasticsearch_ops']['configmaps']['logging-elasticsearch-ops']['elasticsearch.yml'] | flatten_dict }}"
+ vars:
+ __openshift_logging_es_ops_number_of_shards: index.number_of_shards
+ __openshift_logging_es_ops_number_of_replicas: index.number_of_replicas
+ when: openshift_logging_facts['elasticsearch_ops']['configmaps']['logging-elasticsearch-ops'] is defined
+
+- conditional_set_fact:
+ facts: "{{ hostvars[inventory_hostname] }}"
+ vars:
+ openshift_logging_es_number_of_shards: openshift_logging_es_number_of_shards | __openshift_logging_es_number_of_shards
+ openshift_logging_es_number_of_replicas: openshift_logging_es_number_of_replicas | __openshift_logging_es_number_of_replicas
+ openshift_logging_es_ops_number_of_shards: openshift_logging_es_ops_number_of_shards | __openshift_logging_es_ops_number_of_shards
+ openshift_logging_es_ops_number_of_replicas: openshift_logging_es_ops_number_of_replicas | __openshift_logging_es_ops_number_of_replicas