306 lines
13 KiB
Python
Executable File
306 lines
13 KiB
Python
Executable File
#!/usr/bin/env python3
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import argparse
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import sys
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import traceback
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from datetime import datetime
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import requests
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from urllib3.exceptions import InsecureRequestWarning
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from checker import nagios
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from checker import print_icinga2_check_status
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from checker.http import fetch_with_retry
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from checker.linuxfabric.base import get_state
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from checker.units import human_readable_size
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def transform_inputs(old_dict):
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new_dict = {}
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for key in old_dict:
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for item in old_dict[key]:
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new_key = item['id']
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new_dict[new_key] = item
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return new_dict
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def parse_traffic_ts(ts: str):
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datetime_obj = datetime.strptime(ts, '%Y-%m-%dT%H:%M:%S.%fZ')
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current_time = datetime.now()
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time_diff = current_time - datetime_obj
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return time_diff.total_seconds() < 24 * 60 * 60 # less than 24 hrs ago?
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def main():
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parser = argparse.ArgumentParser(description='Check Graylog input health')
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parser.add_argument('-u', '--url', required=True, help='The base Graylog URL')
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parser.add_argument('-t', '--token', required=True, help='Graylog API token')
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parser.add_argument('-i', '--input', help='Input ID to check. If unset, will check cluster metrics')
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parser.add_argument('--warn-mem', type=int, default=75, help='Percentage of JVM memory used for warm')
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parser.add_argument('--crit-mem', type=int, default=100, help='Percentage of JVM memory used for critical')
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parser.add_argument('--insecure', action='store_false', help="Don't verify SSL")
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parser.add_argument('--crit-notif', action='store_true', help='Return critical when there are notifications')
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parser.add_argument('--ignore-update-notif', action='store_true', help='Ignore any update notifications')
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parser.add_argument('--html', action='store_true', help='Print HTML')
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parser.add_argument('--cluster-metrics', action='store_true', help='Also gather cluster metrics and check for notifications')
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args = parser.parse_args()
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base_url = args.url.strip('/')
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if not args.input:
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args.cluster_metrics = True
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if not args.insecure:
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requests.packages.urllib3.disable_warnings(category=InsecureRequestWarning)
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headers = {
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'Accept': 'application/json',
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'X-Requested-By': 'XMLHttpRequest',
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}
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text_result = ''
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metrics_json = {
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'metrics': [
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'org.graylog2.throughput.input.1-sec-rate',
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'org.graylog2.throughput.output.1-sec-rate',
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"org.graylog2.journal.append.1-sec-rate",
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"org.graylog2.journal.read.1-sec-rate",
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"org.graylog2.journal.segments",
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"org.graylog2.journal.entries-uncommitted",
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"jvm.memory.heap.used",
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"jvm.memory.heap.committed",
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"jvm.memory.heap.max"
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],
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}
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if args.input:
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input_data = transform_inputs(
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fetch_with_retry(f'{base_url}/api/cluster/inputstates', headers=headers, auth=(args.token, 'token'),
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verify=args.insecure).json()).get(args.input, {})
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# Get it over with
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if bool(input_data) and input_data.get('state') == 'RUNNING':
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input_name = input_data["message_input"]["title"]
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text_result = f'Graylog input "{input_name}" is running.'
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else:
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input_name = args.input
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if args.html:
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text_result = f'Graylog input <a href="{base_url}/system/inputs" target="_blank">"{input_name}" is not running!</a>'
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else:
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text_result = f'Graylog input "{input_name}" is not running!'
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print_icinga2_check_status(text_result, nagios.STATE_CRIT)
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sys.exit(nagios.STATE_CRIT)
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# If the input is running, continue gathering metrics and other health checks
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input_name_clean = input_name.lower().replace(' ', '_').replace('-', '_')
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type = input_data['message_input']['type']
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metrics_json['metrics'] = metrics_json['metrics'] + [
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f'{type}.{args.input}.incomingMessages',
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f'{type}.{args.input}.open_connections',
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f'{type}.{args.input}.total_connections',
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f'{type}.{args.input}.written_bytes_1sec',
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f'{type}.{args.input}.written_bytes_total',
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f'{type}.{args.input}.read_bytes_1sec',
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f'{type}.{args.input}.read_bytes_total',
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]
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r = fetch_with_retry(f'{base_url}/api/cluster/metrics/multiple', method='post', headers=headers,
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auth=(args.token, 'token'),
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verify=args.insecure, json=metrics_json).json()
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input_metrics = r[list(r.keys())[0]]['metrics']
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# Format the metrics for later
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metrics_data = {}
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for metric in input_metrics:
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if args.input:
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name = metric['full_name'].replace(type, '').replace('org.graylog2.', '').replace(args.input, '')
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else:
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name = metric['full_name'].replace('org.graylog2.', '')
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name = name.strip('.').replace('-', '_').replace('.', '_')
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value = None
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if 'value' in metric['metric']:
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value = metric["metric"]["value"]
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elif 'count' in metric['metric']:
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value = metric["metric"]["count"]
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elif 'rate' in metric['metric']:
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value = metric["metric"]["rate"]["one_minute"]
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name = f'{name}_one_minute'
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value = int(value)
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metrics_data[name] = value
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perfdata = {}
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if args.input:
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# Some metric names are changed for better readability
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perfdata.update({
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f'{input_name_clean}_incoming_messages_rate_per_sec_1min': {
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'value': metrics_data['incomingMessages_one_minute'],
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'min': 0,
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},
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f'{input_name_clean}_connections': {
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'value': metrics_data['open_connections'],
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'min': 0,
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},
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f'{input_name_clean}_network_out_total_1sec': {
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'value': metrics_data['written_bytes_1sec'],
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'min': 0,
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'unit': 'B',
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},
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f'{input_name_clean}_network_out_total_total': {
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'value': metrics_data['written_bytes_total'],
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'min': 0,
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'unit': 'B',
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},
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f'{input_name_clean}_network_in_1sec': {
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'value': metrics_data['read_bytes_1sec'],
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'min': 0,
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'unit': 'B',
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},
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f'{input_name_clean}_network_in_total': {
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'value': metrics_data['read_bytes_total'],
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'min': 0,
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'unit': 'B',
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}
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})
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if args.cluster_metrics:
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jvm_mem_usage_warn = int(metrics_data['jvm_memory_heap_max'] / int(100 / args.warn_mem))
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jvm_mem_usage_crit = int(metrics_data['jvm_memory_heap_max'] / int(100 / args.crit_mem))
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# Get traffic data for last 24 hrs
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traffic_last_24_hrs = fetch_with_retry(f'{base_url}/api/system/cluster/traffic?daily=false', headers=headers,
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auth=(args.token, 'token'), verify=args.insecure).json()
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input_traffic_avg = sum([v for k, v in traffic_last_24_hrs['input'].items() if parse_traffic_ts(k)])
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output_traffic_avg = sum([v for k, v in traffic_last_24_hrs['output'].items() if parse_traffic_ts(k)])
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elasticsearch_health = fetch_with_retry(f'{base_url}/api/system/indexer/cluster/health', headers=headers,
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auth=(args.token, 'token'), verify=args.insecure).json()
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elasticsearch_status = elasticsearch_health['status'].lower()
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elasticsearch_active_shards = elasticsearch_health['shards']['active']
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indexer_failures = fetch_with_retry(f'{base_url}/api/system/indexer/failures?limit=10&offset=0',
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headers=headers, auth=(args.token, 'token'), verify=args.insecure).json()
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perfdata.update({
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'throughput_input_1_sec_rate': {
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'value': int(metrics_data['throughput_input_1_sec_rate']),
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'min': 0,
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},
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'throughput_output_1_sec_rate': {
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'value': int(metrics_data['throughput_output_1_sec_rate']),
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'min': 0,
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},
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'entries_uncommitted': {
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'value': metrics_data['journal_entries_uncommitted'],
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'min': 0,
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},
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'jvm_memory_used': {
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'value': metrics_data['jvm_memory_heap_used'],
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'min': 0,
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'warn': jvm_mem_usage_warn,
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'crit': jvm_mem_usage_crit,
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'max': int(metrics_data['jvm_memory_heap_max']),
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'unit': 'B',
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},
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'network_traffic_in_avg': {
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'value': input_traffic_avg,
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'min': 0,
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'unit': 'B',
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},
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'to_elasticsearch_24hrs_avg': {
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'value': output_traffic_avg,
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'min': 0,
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'unit': 'B',
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},
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'elasticsearch_active_shards': {
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'value': elasticsearch_active_shards,
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'min': 0
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},
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'indexer_failures': {
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'value': indexer_failures['total'],
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'warn': 1,
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'crit': 1,
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'min': 0,
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},
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})
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# Check for notifications
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if args.cluster_metrics:
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notifications_query = fetch_with_retry(f'{base_url}/api/system/notifications', headers=headers,
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auth=(args.token, 'token'), verify=args.insecure).json()
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notifications = []
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for notif in notifications_query['notifications']:
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if notif['type'] == 'outdated_version' and not args.ignore_update_notif:
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notifications.append(notif)
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elif notif['type'] != 'outdated_version':
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notifications.append(notif)
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if len(notifications):
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notif = "notifications" if len(notifications) else "notification"
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are = "are" if len(notifications) else "is"
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if args.html:
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notif_str = f'<a href="{base_url}/system/overview" target="_blank">There {are} {len(notifications)} {notif}.</a>'
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else:
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notif_str = f'There {are} {len(notifications)} {notif}.'
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else:
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notif_str = 'No notifications'
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if indexer_failures['total'] > 0:
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indexer_failures_exit = nagios.STATE_CRIT
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if args.html:
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text_result += f' <a href="{base_url}/system/indices/failures" target="_blank">There are {indexer_failures["total"]} indexer failures!</a>'
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else:
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text_result += f' There are {indexer_failures["total"]} indexer failures!'
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else:
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indexer_failures_exit = nagios.STATE_OK
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# https://go2docs.graylog.org/5-0/setting_up_graylog/elasticsearch.htm#ClusterStatusExplained
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if elasticsearch_status == 'yellow':
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elasticsearch_exit_code = nagios.STATE_WARN
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text_result += ' Elasticsearch is condition YELLOW!'
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elif elasticsearch_status == 'red':
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elasticsearch_exit_code = nagios.STATE_CRIT
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text_result += ' Elasticsearch is condition RED!'
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elif elasticsearch_status == 'green':
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elasticsearch_exit_code = nagios.STATE_OK
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else:
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print_icinga2_check_status(f'unknown Elasticsearch health: {elasticsearch_status}', nagios.STATE_UNKNOWN)
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sys.exit(nagios.STATE_UNKNOWN)
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jvm_mem_usage_state = get_state(int(metrics_data['jvm_memory_heap_used']), jvm_mem_usage_warn,
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jvm_mem_usage_crit, operator='gt')
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if jvm_mem_usage_state != nagios.STATE_OK:
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text_result += f' JVM memory usage is high!'
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exit_code = max(nagios.STATE_OK, jvm_mem_usage_state, elasticsearch_exit_code, indexer_failures_exit)
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if len(notifications):
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text_result += f' There {are} {len(notifications)} {notif}!'
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if args.crit_notif:
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exit_code = nagios.STATE_CRIT # force crit
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if args.input:
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# show less data
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text_result = text_result + f' JVM memory usage: {int((perfdata["jvm_memory_used"]["value"] / metrics_data["jvm_memory_heap_max"]) * 100)}%'
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else:
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# show more data
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text_result = text_result + f' JVM memory usage: {int((perfdata["jvm_memory_used"]["value"] / metrics_data["jvm_memory_heap_max"]) * 100)}%, throughput last 1 second: {human_readable_size(perfdata["throughput_input_1_sec_rate"]["value"])} in - {human_readable_size(perfdata["throughput_output_1_sec_rate"]["value"])} out, Elasticsearch active shards: {perfdata["elasticsearch_active_shards"]["value"]}'
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if args.input:
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text_result = text_result + f' {input_name_clean} events/second for last minute: {perfdata[f"{input_name_clean}_incoming_messages_rate_per_sec_1min"]["value"]}, {input_name_clean}_connections: {perfdata[f"{input_name_clean}_connections"]["value"]}, {input_name_clean}_network_in_total: {human_readable_size(perfdata[f"{input_name_clean}_network_in_total"]["value"], decimal_places=0)}'
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exit_code = nagios.STATE_OK
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else:
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text_result = text_result + '\n' + notif_str
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print_icinga2_check_status(text_result, exit_code, perfdata)
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sys.exit(exit_code)
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if __name__ == "__main__":
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try:
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main()
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except Exception as e:
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print(f'UNKNOWN: exception "{e}"')
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print(traceback.format_exc())
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sys.exit(nagios.STATE_UNKNOWN)
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