晨曦's Blog

This is a window to the soul

发表于 阅读次数： 本文字数： 197 阅读时长 ≈ 1 分钟

安装

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wget -c https://ghproxy.com/https://github.com/prometheus/blackbox_exporter/releases/download/v0.25.0/blackbox_exporter-0.25.0.linux-amd64.tar.gz
tar -zxvf blackbox_exporter-0.25.0.linux-amd64.tar.gz
mkdir /opt/blackbox_exporter
cp blackbox_exporter-0.25.0.linux-amd64/blackbox_exporter /opt/blackbox_exporter/blackbox_exporter

config

​vim /opt/blackbox_exporter/config.yml​

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modules:
  http_2xx:
    prober: http
    http:
      method: GET
  http_post_2xx:
    prober: http
    http:
      method: POST

service

​vim /usr/lib/systemd/system/blackbox_exporter.service​

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[Unit]
Description=Blackbox Exporter
Documentation=https://github.com/prometheus/blackbox_exporter
Wants=network-online.target
After=network-online.target

[Service]
Type=simple
ExecStart=/opt/blackbox_exporter/blackbox_exporter \
  --config.file=/opt/blackbox_exporter/config.yml \
  --web.listen-address=:9116
Restart=always

[Install]
WantedBy=multi-user.target

启动

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systemctl daemon-reload
systemctl start blackbox_exporter
systemctl enable blackbox_exporter

测试

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curl -iv "http://127.0.0.1:9116/probe?module=http_2xx&target=baidu.com"

Prometheus 配置

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- job_name: 'blackbox'
  metrics_path: /probe
  params:
    module: [http_2xx]
  static_configs:
    - targets:
      - http://10.113.75.134:5000/v1/datasets/8a9302de-ded1-493c-8a12-e8acf3d80772/files?apikey=ka-admin123
  relabel_configs:
    - source_labels: [__address__]
      target_label: __param_target
    - source_labels: [__param_target]
      regex: '(http|https)://([^/]+)/.*'
      replacement: '${2}'
      target_label: site
    - source_labels: [__param_target]
      target_label: instance
    - target_label: __address__
      replacement: 127.0.0.1:9116

问题排查

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journalctl -xe -u blackbox_exporter

参考：

https://flashcat.cloud/docs/content/flashcat-partner/prometheus/exporter/commonly/blackbox-exporter/

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发表于 分类于 阅读次数： 本文字数： 31 阅读时长 ≈ 1 分钟

错误

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No route to host

原因

目标服务器防火墙导致

解决

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systemctl status firewalld

systemctl stop firewalld

systemctl disable firewalld

发表于 分类于 阅读次数： 本文字数： 29 阅读时长 ≈ 1 分钟 
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RUN yum install -y kde-l10n-Chinese && \
    yum install -y glibc-common && \
    localedef -c -f UTF-8 -i zh_CN zh_CN.utf8

# ENV LANG zh_CN.UTF-8
ENV LC_ALL zh_CN.UTF-8

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错误

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Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=container error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"

解决

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mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.huaweicloud.com/repository/conf/CentOS-7-anon.repo

替换成华为源

参考：

https://developer.aliyun.com/mirror/centos

https://mirrors.huaweicloud.com/mirrorDetail/5ea14ecab05943f36fb75ee5

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ansible

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# 1、安装yumdownloader
yum install yum-utils -y

# 2、获取ansible安装包及依赖
mkdir /tmp/ansible
yumdownloader --resolve --destdir /tmp/ansible ansible
tar zcf ansible.tar.gz /tmp/ansible

# 3、在离线服务器上解压压缩包
tar zxf /tmp/ansible.tar.gz

# 4、执行安装
rpm -ivh ansible-2.9.27-1.el7.noarch.rpm

参考：

https://github.com/wgrice/notebook/blob/master/devops/ansible/ansible%E7%A6%BB%E7%BA%BF%E5%AE%89%E8%A3%85.md

发表于 分类于 阅读次数： 本文字数： 100 阅读时长 ≈ 1 分钟

Mac

https://github.com/ktver/NgX 注：会修改底层 Wifi 中的代理设置

Win

https://github.com/2dust/v2rayN

https://github.com/KevinSHIT/NaiveSharp

参考

https://github.com/klzgrad/naiveproxy/issues/158

NgX

  1. NgX 不要给超管，会起一个 socks5 的代理在 10800 端口上
  2. 可以手动在电脑 Wifi - 详细信息 - 代理 中设置 SOCKS 代理，用以利用 NgX 的代理规则
  3. 可以设置不走代理域，如：* .jakehu.me,192.168. .*

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CentOS:

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yum install bash-completion -y
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc

MacOS:

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$ brew install bash-completion
$ kubectl completion bash > $(brew --prefix)/etc/bash_completion.d/kubectl

参考：

https://kubernetes.io/docs/tasks/tools/#enabling-shell-autocompletion

https://github.com/xujiyou/blog-data/blob/master/%E4%BA%91%E5%8E%9F%E7%94%9F/Kubernetes/K8sFAQ.md

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现象

k8s 集群某一个节点 kubelet 挂了，无法启动

错误

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# cat /var/log/messages | grep kubelet | grep failed
failed to run Kubelet: unable to load bootstrap kubeconfig: stat /etc/kubernetes/bootstrap-kubelet.conf: no such file or directory

解决

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rm -rf /var/lib/kubelet/pki/

# 大于1.20的版本
kubectl get cm kubeadm-config -n kube-system -o=jsonpath="{.data.ClusterConfiguration}" > kubeadm.yaml
kubeadm kubeconfig user --org system:nodes --client-name system:node:$(hostname) --config kubeadm.yaml > /etc/kubernetes/kubelet.conf

# 小于1.20的版本
kubeadm alpha kubeconfig user --org system:nodes --client-name system:node:$(hostname) > /etc/kubernetes/kubelet.conf

其他解决方案

参考：https://blog.csdn.net/margu_168/article/details/135844420

发表于 分类于 阅读次数： 本文字数： 8 阅读时长 ≈ 1 分钟 
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sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

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发表于 分类于 阅读次数： 本文字数： 106 阅读时长 ≈ 1 分钟

注册表 & 加速

参考：https://github.com/abiosoft/colima/issues/834

比起加速，代理更快

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# 设置
colima start --edit
docker:
  insecure-registries:
    - harbor.jakehu.me:31104
  registry-mirrors:
    - https://docker.registry.huwenxi.com

# 查看配置
colima ssh -- cat /etc/docker/daemon.json; echo
{
  "exec-opts": [
    "native.cgroupdriver=cgroupfs"
  ],
  "features": {
    "buildkit": true
  },
  "host-gateway-ip": "192.168.5.2",
  "insecure-registries": [
    "harbor.jakehu.me:31104"
  ],
  "registry-mirrors": [
    "https://docker.registry.huwenxi.com"
  ]
}

Docker 代理

参考：https://github.com/abiosoft/colima/issues/294

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# 设置
colima start --edit
env:
  HTTP_PROXY: http://10.168.64.147:1080
  HTTPS_PROXY: http://10.168.64.147:1080
  NO_PROXY: localhost,127.0.0.1,y2-harbor.geega.com,y2-harbor.geega.com:31104

# 校验
docker info | grep "Proxy"

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