如何在Ubuntu 20.04 LTS Focal Fossa上安装Prometheus

步骤1.首先，通过apt在终端中运行以下以下命令，确保所有系统软件包都是最新的。
sudo apt update
sudo apt upgrade
第2步。安装Nginx Web服务器。
Nginx在默认的Ubuntu存储库中可用。要安装它，请运行以下命令：
sudo apt install nginx
安装完成后，运行以下命令以使Nginx在服务器启动时自动启动：
sudo systemctl stop nginx.service
sudo systemctl start nginx.service
sudo systemctl enable nginx.service
步骤3.创建Prometheus用户。
我们必须创建名为prometheus的用户和组，以及名为Prometheus的目录：
sudo useradd -s /sbin/nologin --system -g prometheus prometheus
sudo mkdir /var/lib/prometheus
for i in rules rules.d files_sd; do sudo mkdir -p /etc/prometheus/${i}; done
步骤4.在Ubuntu 20.04上安装Prometheus。
使用以下wget命令下载Prometheus的最新稳定版本：
mkdir -p /tmp/prometheus && cd /tmp/prometheus
curl -s https://api.github.com/repos/prometheus/prometheus/releases/latest | grep browser_download_url | grep linux-amd64 | cut -d '"' -f 4 | wget -qi -
tar xvf prometheus*.tar.gz
一旦文件提取完成，然后将提取的Prometheus归档文件夹下的prometheus和promtool二进制文件移动到/usr/local/bin目录：
sudo mv prometheus promtool /usr/local/bin/
步骤5.配置Prometheus。
我们将在/etc/prometheus目录中创建名为prometheus.yml的配置文件：
sudo mv prometheus.yml /etc/prometheus/prometheus.yml
sudo mv consoles/ console_libraries/ /etc/prometheus/
sudo nano /etc/prometheus/prometheus.yml
prometheus.yml的内容如下：

my global config
global:
scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
# scrape_timeout is set to the global default (10s).
Alertmanager configuration
alerting:
alertmanagers:
static_configs: targets:
# - alertmanager:9093
Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
# - "first_rules.yml"
# - "second_rules.yml"
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= to any timeseries scraped from this config.
job_name: 'prometheus'
metrics_path defaults to '/metrics'
scheme defaults to 'http'.
static_configs:
targets: ['localhost:9090']
步骤6.创建Prometheus Systemd服务。
现在，我们将为systemd服务创建一个文件：
sudo nano /etc/systemd/system/prometheus.service
添加以下文件：

[Unit]
Description=Prometheus
Documentation=https://prometheus.io/docs/introduction/overview/
Wants=network-online.target
After=network-online.target

[Service]
Type=simple
User=prometheus
Group=prometheus
ExecReload=/bin/kill -HUP \$MAINPID
ExecStart=/usr/local/bin/prometheus \
--config.file=/etc/prometheus/prometheus.yml \
--storage.tsdb.path=/var/lib/prometheus \
--web.console.templates=/etc/prometheus/consoles \
--web.console.libraries=/etc/prometheus/console_libraries \
--web.listen-address=0.0.0.0:9090 \
--web.external-url=

SyslogIdentifier=prometheus
Restart=always

[Install]
WantedBy=multi-user.target
然后，将以下目录的所有权更改为Prometheus用户和组：
for i in rules rules.d files_sd; do sudo chown -R prometheus:prometheus /etc/prometheus/${i}; done
for i in rules rules.d files_sd; do sudo chmod -R 775 /etc/prometheus/${i}; done
sudo chown -R prometheus:prometheus /var/lib/prometheus/
完成上述配置后，请使用以下命令重新加载systemd：
sudo systemctl daemon-relaod
sudo systemctl start prometheus
sudo systemctl enable prometheus
步骤7.配置防火墙。
同时，您需要确保将防火墙配置为允许HTTP（80），HTTPS（443）和9090端口上的流量。Nginx通过以下方式将自己注册为服务ufw：
sudo ufw allow in "Nginx Full"
sudo ufw allow 9090/tcp
步骤8.访问Prometheus Web界面。
默认情况下，Prometheus将在HTTP端口9090上可用。打开您喜欢的浏览器，然后浏览至http://your-domain.com:9090或http://server-ip-addreess:9090完成所需的步骤以完成安装。

至此，您就已经成功安装了Prometheus。A5互联https://www.a5idc.net/