Node Exporter

node-exporter 安装

生成账号密码的 bcrypt hash

apt install apache2-utils -y

生成一个账号密码的 bcrypt hash

• -B 强制使用 bcrypt 算法
• -C 10 指定 bcrypt 的 cost 值为 10, golang bcrypt 默认 cost 值也为 10

注意修改下面的 username 和 password 为你要设置的账号密码

# htpasswd -nbBC 10 username password
username:$2y$10$poDYDLemE3r95gcQ.h8FdODudFaFZhwZCSX1RTwpI2s8V4Mwm0.lO

关于 bcrypt

格式为 $2<a/b/x/y>$[cost]$[22 character salt][31 character hash]

例如

$2y$10$poDYDLemE3r95gcQ.h8FdODudFaFZhwZCSX1RTwpI2s8V4Mwm0.lO
\__/\/ \____________________/\_____________________________/
Alg Cost      Salt                        Hash

运行 node-exporter

1. 创建 prometheus 配置文件 /etc/prometheus/web.yml
2. 创建 docker-compose.yml 文件
3. 运行 docker compose

PASS='$2y$10$poDYDLemE3r95gcQ.h8FdODudFaFZhwZCSX1RTwpI2s8V4Mwm0.lO'
mkdir -p /etc/prometheus

cat <<EOF> /etc/prometheus/web.yml
basic_auth_users:
  # username: password
  prometheus: ${PASS}
EOF

cat <<EOF> /etc/prometheus/docker-compose.yml
services:
  node-exporter:
    image: quay.io/prometheus/node-exporter:latest
    container_name: node-exporter
    command: 
      - "--path.rootfs=/host"
      - "--web.config.file=/etc/prometheus/web.yml"
    network_mode: "host"
    pid: host
    restart: always
    volumes:
      - '/:/host:ro,rslave'
      - /etc/prometheus/web.yml:/etc/prometheus/web.yml
EOF

docker compose -f /etc/prometheus/docker-compose.yml up -d

修改 kube-prometheus-stack chart 配置

修改 kube-prometheus-stack chart 配置并更新, 记得修改 {EDIT_HERE} 为实际值

cat <<EOF> values.yaml
# prometheus service
prometheus:
  prometheusSpec:
    additionalScrapeConfigs:
      - job_name: 'host-node-exporter'
        basic_auth:
          username: {EDIT_HERE}
          password: {EDIT_HERE}
        static_configs:
          - targets:
            - '{EDIT_HERE}:9100'
  service:
    type: NodePort

# grafana service
grafana:
  service:
    type: NodePort
EOF

helm upgrade  --install --create-namespace --namespace monitoring kube-prometheus-stack -f values.yaml prometheus-community/kube-prometheus-stack