ubuntu安裝prometheus很是簡單:html
apt update apt install prometheus systemctl enable prometheus systemctl enable prometheus-node-exporter
apt安裝prometheus和prometheus-node-exporter以後便帶有基本配置,無需修改。node
確保開啓服務開啓:git
systemctl status prometheus systemctl status prometheus-node-exporter
順便使用它監控mongodb,安裝prometheus-mongodb-exporter
:github
apt install prometheus-mongodb-exporter systemctl enable prometheus-mongodb-exporter
此外因爲mongodb開啓了密碼驗證,須要注意mongodb用戶的權限:mongodb_exporter github連接web
而後須要修改 /etc/default/prometheus-mongodb-exporter
中的 ARGS
以下:mongodb
# ARGS='-mongodb.uri="mongodb://localhost:27017"' ARGS='-mongodb.uri="mongodb://xxx:xxxxx@localhost:27017"'
mongodb URI格式以下:shell
mongodb://[username:password@]host1[:port1][,...hostN[:portN]][/[database][?options]]
若是 username 或 password 包含 @ : / %
四種符號須要使用 百分號編碼.json
錯誤添加須要刪除時用db.getSiblingDB("admin").dropUser("mongodb_exporter")
ubuntu
而後重啓一下服務api
systemctl restart prometheus-mongodb-exporter
安裝:
sudo add-apt-repository "deb https://packages.grafana.com/oss/deb stable main" wget -q -O - https://packages.grafana.com/gpg.key | sudo apt-key add - apt update apt install grafana
配置:
配置文件爲 /etc/grafana/grafana.ini
,注意以下內容:
... [server] domain = www.xxxx.com enforce_domain = true root_url = %(protocol)s://%(domain)s/grafana ... [security] admin_password = xxxx
而後訪問 www.xxxx.com/grafana 登陸,用戶名admin,密碼爲上面設置的admin_password。
而後按照 [這裏][https://github.com/percona/grafana-dashboards] 配置數據源使用prometheus,並導入面板。通常導入這些便可:
(注意:json中的pmm-singlestat-panel
可能須要替換爲singlestat
)
上述Dashboard配置好以後,不該繼續使用admin登陸系統。
在設置中「邀請」用戶,填寫本身的郵箱而後經過郵箱連接設置密碼,便可以本身的郵箱登陸grafana。
注:
使用prometheus監控兩臺服務器,配置文件 /etc/prometheus/prometheus.yml
內容以下:
# Sample config for Prometheus. global: scrape_interval: 15s # By default, scrape targets every 15 seconds. evaluation_interval: 15s # By default, scrape targets every 15 seconds. # scrape_timeout is set to the global default (10s). # Attach these labels to any time series or alerts when communicating with # external systems (federation, remote storage, Alertmanager). external_labels: monitor: 'example' # Load and evaluate rules in this file every 'evaluation_interval' seconds. rule_files: # - "first.rules" # - "second.rules" # A scrape configuration containing exactly one endpoint to scrape: # Here it's Prometheus itself. 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 scrape_timeout: 5s # metrics_path defaults to '/metrics' # scheme defaults to 'http'. static_configs: - targets: ['localhost:9090'] - job_name: "web-server" # If prometheus-node-exporter is installed, grab stats about the local # machine by default. static_configs: - targets: ['localhost:9100'] - job_name: "worker-node1" static_configs: - targets: ['192.168.0.5:9100']
這個配置是沒問題的,在另外一臺機器 (192.168.0.5
) 上安裝並啓用 prometheus-node-exporter
便可。
但若是你僅僅修改了某個job_name
(而沒有修改ip),好比把web-server
改成node
,那麼grafana界面中的singlestat
panel將不能正確顯示,顯示「Only queries that return single...」,
這是由於singlestat只能顯示一個結果,而查詢語句查到了兩個結果。解決方式是刪除以前的數據系列:
首先中止prometheus服務,傳入--web.enable-admin-api
參數手動運行
而後這樣刪除:
curl -X POST -g 'http://localhost:9090/api/v1/admin/tsdb/delete_series?match[]={instance="localhost:9100"}'
參考連接:Prometheus: Delete Time Series Metrcs
注2:上述狀況的查詢語句多是這樣的(能夠在grafana中看到):