diff options
Diffstat (limited to 'roles/openshift_health_checker/openshift_checks/logging/elasticsearch.py')
| -rw-r--r-- | roles/openshift_health_checker/openshift_checks/logging/elasticsearch.py | 199 |
1 files changed, 97 insertions, 102 deletions
diff --git a/roles/openshift_health_checker/openshift_checks/logging/elasticsearch.py b/roles/openshift_health_checker/openshift_checks/logging/elasticsearch.py index 01cb35b81..7fc843fd7 100644 --- a/roles/openshift_health_checker/openshift_checks/logging/elasticsearch.py +++ b/roles/openshift_health_checker/openshift_checks/logging/elasticsearch.py @@ -1,190 +1,193 @@ -""" -Module for performing checks on an Elasticsearch logging deployment -""" +"""Check for an aggregated logging Elasticsearch deployment""" import json import re -from openshift_checks import get_var +from openshift_checks import OpenShiftCheckException, OpenShiftCheckExceptionList from openshift_checks.logging.logging import LoggingCheck class Elasticsearch(LoggingCheck): - """Module that checks an integrated logging Elasticsearch deployment""" + """Check for an aggregated logging Elasticsearch deployment""" name = "elasticsearch" tags = ["health", "logging"] - logging_namespace = None - - def run(self, tmp, task_vars): + def run(self): """Check various things and gather errors. Returns: result as hash""" - self.logging_namespace = get_var(task_vars, "openshift_logging_namespace", default="logging") - es_pods, error = super(Elasticsearch, self).get_pods_for_component( - self.execute_module, - self.logging_namespace, - "es", - task_vars, - ) - if error: - return {"failed": True, "changed": False, "msg": error} - check_error = self.check_elasticsearch(es_pods, task_vars) - - if check_error: - msg = ("The following Elasticsearch deployment issue was found:" - "\n-------\n" - "{}".format(check_error)) - return {"failed": True, "changed": False, "msg": msg} - + es_pods = self.get_pods_for_component("es") + self.check_elasticsearch(es_pods) # TODO(lmeyer): run it all again for the ops cluster - return {"failed": False, "changed": False, "msg": 'No problems found with Elasticsearch deployment.'} - def _not_running_elasticsearch_pods(self, es_pods): - """Returns: list of running pods, list of errors about non-running pods""" - not_running = super(Elasticsearch, self).not_running_pods(es_pods) - if not_running: - return not_running, [( - 'The following Elasticsearch pods are not running:\n' - '{pods}' - 'These pods will not aggregate logs from their nodes.' - ).format(pods=''.join( - " {} ({})\n".format(pod['metadata']['name'], pod['spec'].get('host', 'None')) - for pod in not_running - ))] - return not_running, [] - - def check_elasticsearch(self, es_pods, task_vars): - """Various checks for elasticsearch. Returns: error string""" - not_running_pods, error_msgs = self._not_running_elasticsearch_pods(es_pods) - running_pods = [pod for pod in es_pods if pod not in not_running_pods] + return {} + + def check_elasticsearch(self, es_pods): + """Perform checks for Elasticsearch. Raises OpenShiftCheckExceptionList on any errors.""" + running_pods, errors = self.running_elasticsearch_pods(es_pods) pods_by_name = { pod['metadata']['name']: pod for pod in running_pods # Filter out pods that are not members of a DC if pod['metadata'].get('labels', {}).get('deploymentconfig') } if not pods_by_name: - return 'No logging Elasticsearch pods were found. Is logging deployed?' - error_msgs += self._check_elasticsearch_masters(pods_by_name, task_vars) - error_msgs += self._check_elasticsearch_node_list(pods_by_name, task_vars) - error_msgs += self._check_es_cluster_health(pods_by_name, task_vars) - error_msgs += self._check_elasticsearch_diskspace(pods_by_name, task_vars) - return '\n'.join(error_msgs) + # nothing running, cannot run the rest of the check + errors.append(OpenShiftCheckException( + 'NoRunningPods', + 'No logging Elasticsearch pods were found running, so no logs are being aggregated.' + )) + raise OpenShiftCheckExceptionList(errors) + + errors += self.check_elasticsearch_masters(pods_by_name) + errors += self.check_elasticsearch_node_list(pods_by_name) + errors += self.check_es_cluster_health(pods_by_name) + errors += self.check_elasticsearch_diskspace(pods_by_name) + if errors: + raise OpenShiftCheckExceptionList(errors) + + def running_elasticsearch_pods(self, es_pods): + """Returns: list of running pods, list of errors about non-running pods""" + not_running = self.not_running_pods(es_pods) + running_pods = [pod for pod in es_pods if pod not in not_running] + if not_running: + return running_pods, [OpenShiftCheckException( + 'PodNotRunning', + 'The following Elasticsearch pods are defined but not running:\n' + '{pods}'.format(pods=''.join( + " {} ({})\n".format(pod['metadata']['name'], pod['spec'].get('host', 'None')) + for pod in not_running + )) + )] + return running_pods, [] @staticmethod def _build_es_curl_cmd(pod_name, url): base = "exec {name} -- curl -s --cert {base}cert --key {base}key --cacert {base}ca -XGET '{url}'" return base.format(base="/etc/elasticsearch/secret/admin-", name=pod_name, url=url) - def _check_elasticsearch_masters(self, pods_by_name, task_vars): - """Check that Elasticsearch masters are sane. Returns: list of error strings""" + def check_elasticsearch_masters(self, pods_by_name): + """Check that Elasticsearch masters are sane. Returns: list of errors""" es_master_names = set() - error_msgs = [] + errors = [] for pod_name in pods_by_name.keys(): # Compare what each ES node reports as master and compare for split brain get_master_cmd = self._build_es_curl_cmd(pod_name, "https://localhost:9200/_cat/master") - master_name_str = self._exec_oc(get_master_cmd, [], task_vars) + master_name_str = self.exec_oc(get_master_cmd, []) master_names = (master_name_str or '').split(' ') if len(master_names) > 1: es_master_names.add(master_names[1]) else: - error_msgs.append( - 'No master? Elasticsearch {pod} returned bad string when asked master name:\n' + errors.append(OpenShiftCheckException( + 'NoMasterName', + 'Elasticsearch {pod} gave unexpected response when asked master name:\n' ' {response}'.format(pod=pod_name, response=master_name_str) - ) + )) if not es_master_names: - error_msgs.append('No logging Elasticsearch masters were found. Is logging deployed?') - return '\n'.join(error_msgs) + errors.append(OpenShiftCheckException( + 'NoMasterFound', + 'No logging Elasticsearch masters were found.' + )) + return errors if len(es_master_names) > 1: - error_msgs.append( + errors.append(OpenShiftCheckException( + 'SplitBrainMasters', 'Found multiple Elasticsearch masters according to the pods:\n' '{master_list}\n' 'This implies that the masters have "split brain" and are not correctly\n' 'replicating data for the logging cluster. Log loss is likely to occur.' .format(master_list='\n'.join(' ' + master for master in es_master_names)) - ) + )) - return error_msgs + return errors - def _check_elasticsearch_node_list(self, pods_by_name, task_vars): - """Check that reported ES masters are accounted for by pods. Returns: list of error strings""" + def check_elasticsearch_node_list(self, pods_by_name): + """Check that reported ES masters are accounted for by pods. Returns: list of errors""" if not pods_by_name: - return ['No logging Elasticsearch masters were found. Is logging deployed?'] + return [OpenShiftCheckException( + 'MissingComponentPods', + 'No logging Elasticsearch pods were found.' + )] # get ES cluster nodes node_cmd = self._build_es_curl_cmd(list(pods_by_name.keys())[0], 'https://localhost:9200/_nodes') - cluster_node_data = self._exec_oc(node_cmd, [], task_vars) + cluster_node_data = self.exec_oc(node_cmd, []) try: cluster_nodes = json.loads(cluster_node_data)['nodes'] except (ValueError, KeyError): - return [ + return [OpenShiftCheckException( + 'MissingNodeList', 'Failed to query Elasticsearch for the list of ES nodes. The output was:\n' + cluster_node_data - ] + )] # Try to match all ES-reported node hosts to known pods. - error_msgs = [] + errors = [] for node in cluster_nodes.values(): # Note that with 1.4/3.4 the pod IP may be used as the master name if not any(node['host'] in (pod_name, pod['status'].get('podIP')) for pod_name, pod in pods_by_name.items()): - error_msgs.append( + errors.append(OpenShiftCheckException( + 'EsPodNodeMismatch', 'The Elasticsearch cluster reports a member node "{node}"\n' 'that does not correspond to any known ES pod.'.format(node=node['host']) - ) + )) - return error_msgs + return errors - def _check_es_cluster_health(self, pods_by_name, task_vars): + def check_es_cluster_health(self, pods_by_name): """Exec into the elasticsearch pods and check the cluster health. Returns: list of errors""" - error_msgs = [] + errors = [] for pod_name in pods_by_name.keys(): cluster_health_cmd = self._build_es_curl_cmd(pod_name, 'https://localhost:9200/_cluster/health?pretty=true') - cluster_health_data = self._exec_oc(cluster_health_cmd, [], task_vars) + cluster_health_data = self.exec_oc(cluster_health_cmd, []) try: health_res = json.loads(cluster_health_data) if not health_res or not health_res.get('status'): raise ValueError() except ValueError: - error_msgs.append( + errors.append(OpenShiftCheckException( + 'BadEsResponse', 'Could not retrieve cluster health status from logging ES pod "{pod}".\n' 'Response was:\n{output}'.format(pod=pod_name, output=cluster_health_data) - ) + )) continue if health_res['status'] not in ['green', 'yellow']: - error_msgs.append( + errors.append(OpenShiftCheckException( + 'EsClusterHealthRed', 'Elasticsearch cluster health status is RED according to pod "{}"'.format(pod_name) - ) + )) - return error_msgs + return errors - def _check_elasticsearch_diskspace(self, pods_by_name, task_vars): + def check_elasticsearch_diskspace(self, pods_by_name): """ Exec into an ES pod and query the diskspace on the persistent volume. Returns: list of errors """ - error_msgs = [] + errors = [] for pod_name in pods_by_name.keys(): df_cmd = 'exec {} -- df --output=ipcent,pcent /elasticsearch/persistent'.format(pod_name) - disk_output = self._exec_oc(df_cmd, [], task_vars) + disk_output = self.exec_oc(df_cmd, []) lines = disk_output.splitlines() # expecting one header looking like 'IUse% Use%' and one body line body_re = r'\s*(\d+)%?\s+(\d+)%?\s*$' if len(lines) != 2 or len(lines[0].split()) != 2 or not re.match(body_re, lines[1]): - error_msgs.append( + errors.append(OpenShiftCheckException( + 'BadDfResponse', 'Could not retrieve storage usage from logging ES pod "{pod}".\n' 'Response to `df` command was:\n{output}'.format(pod=pod_name, output=disk_output) - ) + )) continue inode_pct, disk_pct = re.match(body_re, lines[1]).groups() - inode_pct_thresh = get_var(task_vars, 'openshift_check_efk_es_inode_pct', default='90') + inode_pct_thresh = self.get_var('openshift_check_efk_es_inode_pct', default='90') if int(inode_pct) >= int(inode_pct_thresh): - error_msgs.append( + errors.append(OpenShiftCheckException( + 'InodeUsageTooHigh', 'Inode percent usage on the storage volume for logging ES pod "{pod}"\n' ' is {pct}, greater than threshold {limit}.\n' ' Note: threshold can be specified in inventory with {param}'.format( @@ -192,10 +195,11 @@ class Elasticsearch(LoggingCheck): pct=str(inode_pct), limit=str(inode_pct_thresh), param='openshift_check_efk_es_inode_pct', - )) - disk_pct_thresh = get_var(task_vars, 'openshift_check_efk_es_storage_pct', default='80') + ))) + disk_pct_thresh = self.get_var('openshift_check_efk_es_storage_pct', default='80') if int(disk_pct) >= int(disk_pct_thresh): - error_msgs.append( + errors.append(OpenShiftCheckException( + 'DiskUsageTooHigh', 'Disk percent usage on the storage volume for logging ES pod "{pod}"\n' ' is {pct}, greater than threshold {limit}.\n' ' Note: threshold can be specified in inventory with {param}'.format( @@ -203,15 +207,6 @@ class Elasticsearch(LoggingCheck): pct=str(disk_pct), limit=str(disk_pct_thresh), param='openshift_check_efk_es_storage_pct', - )) - - return error_msgs - - def _exec_oc(self, cmd_str, extra_args, task_vars): - return super(Elasticsearch, self).exec_oc( - self.execute_module, - self.logging_namespace, - cmd_str, - extra_args, - task_vars, - ) + ))) + + return errors |