简介
Prometheus是Golang写的，编译后就是一个二进制文件，不依赖于第三方运行库。这样子就可以让我们很方便的部署。
下载安装
Golang的交叉编译，可以很容易实现跨平台。
如果是测试实验可以在下载windows版本的就可以了。
我这边都是Linux环境，直接下载Linux版本
wget -c https://github.com/prometheus/prometheus/releases/download/v2.23.0/prometheus-2.23.0.linux-amd64.tar.gz
tar zxvf prometheus-2.23.0.linux-amd64.tar.gz
运行
解压后，就可以执行二进制文件prometheus
./prometheus
默认配置文件是当前目录下的prometheus.yml
默认配置文件里面只有拉取prometheus自己的指标。
帮助
./prometheus –help
prometheus 提供了很多参数可以进行配置，根据实际情况进行设置即可。
usage: prometheus [<flags>]
The Prometheus monitoring server
Flags:
-h, –help Show context-sensitive help (also try –help-long and –help-man).
–version Show application version.
–config.file=”prometheus.yml”
Prometheus configuration file path.
–web.listen-address=”0.0.0.0:9090″
Address to listen onfor UI, API, and telemetry.
–web.read-timeout=5m Maximum duration before timing out read of the request, and closing idle connections.
–web.max-connections=512 Maximum number of simultaneous connections.
–web.external-url=<URL> The URL under which Prometheus is externally reachable (for example, if Prometheus is served via a reverse proxy). Used for generating relative and absolute links back to
Prometheus itself. If the URL has a path portion, it will be used to prefix all HTTP endpoints served by Prometheus. If omitted, relevant URL components will be derived
automatically.
–web.route-prefix=<path> Prefix for the internal routes of web endpoints. Defaults to path of –web.external-url.
–web.user-assets=<path> Path to static asset directory, available at /user.
–web.enable-lifecycle Enable shutdown and reload via HTTP request.
–web.enable-admin-api Enable API endpoints for admin control actions.
–web.console.templates=”consoles”
Path to the console template directory, available at /consoles.
–web.console.libraries=”console_libraries”
Path to the console library directory.
–web.page-title=”Prometheus Time Series Collection and Processing Server”
Document title of Prometheus instance.
–web.cors.origin=”.*” Regex for CORS origin. It is fully anchored. Example: https?://(domain1|domain2)\.com
–storage.tsdb.path=”data/”
Base path for metrics storage.
–storage.tsdb.retention=STORAGE.TSDB.RETENTION
[DEPRECATED] How long to retain samples in storage. This flag has been deprecated, use “storage.tsdb.retention.time”instead.
–storage.tsdb.retention.time=STORAGE.TSDB.RETENTION.TIME
How long to retain samples in storage. When this flag isset it overrides “storage.tsdb.retention”. If neither this flag nor “storage.tsdb.retention” nor
“storage.tsdb.retention.size”isset, the retention time defaults to 15d. Units Supported: y, w, d, h, m, s, ms.
–storage.tsdb.retention.size=STORAGE.TSDB.RETENTION.SIZE
[EXPERIMENTAL] Maximum number of bytes that can be stored for blocks. A unit is required, supported units: B, KB, MB, GB, TB, PB, EB. Ex: “512MB”. This flag is experimental and
can be changed in future releases.
–storage.tsdb.no-lockfile
Do notcreate lockfile in data directory.
–storage.tsdb.allow-overlapping-blocks
[EXPERIMENTAL] Allow overlapping blocks, which in turn enables vertical compaction and vertical query merge.
–storage.tsdb.wal-compression
Compress the tsdb WAL.
–storage.remote.flush-deadline=<duration>
How long to wait flushing sample on shutdown or config reload.
–storage.remote.read-sample-limit=5e7
Maximum overall number of samples toreturn via the remote read interface, in a single query. 0 means no limit. This limit is ignored for streamed response types.
–storage.remote.read-concurrent-limit=10
Maximum number of concurrent remote read calls. 0 means no limit.
–storage.remote.read-max-bytes-in-frame=1048576
Maximum number of bytes in a single frame for streaming remote read response types before marshalling. Note that client might have limit on frame sizeas well. 1MB as
recommended by protobuf bydefault.
–rules.alert.for-outage-tolerance=1h
Maxtimeto tolerate prometheus outage for restoring “for” state of alert.
–rules.alert.for-grace-period=10m
Minimum duration between alert and restored “for” state. This is maintained onlyfor alerts with configured “for”time greater than grace period.
–rules.alert.resend-delay=1m
Minimum amount oftimeto wait before resending an alert to Alertmanager.
–alertmanager.notification-queue-capacity=10000
The capacity of the queue for pending Alertmanager notifications.
–alertmanager.timeout=10s
Timeout for sending alerts to Alertmanager.
–query.lookback-delta=5m The maximum lookback duration for retrieving metrics during expression evaluations and federation.
–query.timeout=2m Maximum time a query may take before being aborted.
–query.max-concurrency=20
Maximum number of queries executed concurrently.
–query.max-samples=50000000
Maximum number of samples a single query can loadinto memory. Note that queries will fail if they try toload more samples than this into memory, so this also limits the
number of samples a query can return.
–log.level=info Only log messages with the given severity or above. One of: [debug, info, warn, error]
–log.format=logfmt Output format of log messages. One of: [logfmt, json]
注册成服务
目前linux大部分的发行版本都是使用systemd管理系统服务了，我们可以直接编辑一个systemd的service文件，来部署prometheus服务。
vim /etc/systemd/system/prometheus.service
如果没有设置–storage.tsdb.path，记得设置好工作目录WorkingDirectory，不然所有数据都会保存到家目录里面。
[Unit]
Description=prometheus
After=network.target
[Service]
Type=simple
WorkingDirectory=/opt/prometheus/prometheus
ExecStart=/opt/prometheus/prometheus/prometheus –config.file=”/opt/prometheus/prometheus/prometheus.yml”
LimitNOFILE=65536
PrivateTmp=true
RestartSec=2
StartLimitInterval=0
Restart=always
[Install]
WantedBy=multi-user.target
使用systemctl加载文件、控制服务
systemctl daemon-reload
systemctl enable prometheus
systemctl start prometheus
WebUI
启动之后，默认监听是9090端口，浏览器直接访问即可
http://[ip]:9090
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