Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud. Since its inception in 2012, many companies and organizations have adopted Prometheus, and the project has a very active developer and user community. It is now a standalone open source project and maintained independently of any company. To emphasize this, and to clarify the project's governance structure, Prometheus joined the Cloud Native Computing Foundation in 2016 as the second hosted project, after Kubernetes.
scrape_configs:
# The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
- job_name: 'prometheus'
# Override the global default and scrape targets from this job every 5 seconds.
scrape_interval: 5s
static_configs:
- targets: ['127.0.0.1:9090']
- job_name: 'node' # 將node新增到監控中
static_configs:
- targets: ['127.0.0.1:9100']
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點選 Status -> Targets, 如果能看到當前有兩個正在被監控的程式，且都處於UP狀態，則配置成功
為 prometheus 新增報警
配置檔案處理
到 alertmanager 解壓目錄下， vim alertmanager.yml 中加入:
global:
# The smarthost and SMTP sender used for mail notifications.
smtp_smarthost: 'you email host:587'
smtp_from: 'email_name@qq.com'
smtp_auth_username: 'email_name@qq.com'
smtp_auth_password: 'email_password'
resolve_timeout: 5m
route:
group_by: ['alertname']
group_wait: 10s
group_interval: 10s
repeat_interval: 1h
receiver: 'web.hook'
receivers:
- name: 'web.hook'
email_configs:
- to: 'receive alert email account'
inhibit_rules:
- source_match:
severity: 'critical'
target_match:
severity: 'warning'
equal: ['alertname', 'dev', 'instance']
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到 prometheus 解壓目錄下, 新建檔案 alert.rules
vim alert.rules 在檔案中加入:
groups:
- name: example
rules:
# Alert for any instance that is unreachable for >5 minutes.
- alert: InstanceDown
expr: up == 0
for: 5m
labels:
severity: page
annotations:
summary: "Instance {{ $labels.instance }} down"
description: "{{ $labels.instance }} of job {{ $labels.job }} has been down for more than 5 minutes."
# Alert for any instance that has a median request latency >1s.
- alert: APIHighRequestLatency
expr: api_http_request_latencies_second{quantile="0.5"} > 1
for: 10m
annotations:
summary: "High request latency on {{ $labels.instance }}"
description: "{{ $labels.instance }} has a median request latency above 1s (current value: {{ $value }}s)"
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將報警規則和報警元件配置到 prometheus 中:
vim prometheus.yml，加入如下設定:
rule_files:
- "test_alert.rules"
# Alerting specifies settings related to the Alertmanager.
alerting:
alertmanagers:
- static_configs:
- targets: ['127.0.0.1:9093']
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