zhangguanzhang

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大致写下快速写一个 systemd 的定时任务，不使用 cron 是因为 cron 比较弱，而且日志查看不友好。

文件

需要有一个 service 文件和 timer 文件，前者描述启动相关，后者描述定时相关属性

cat > /etc/systemd/system/gitlab-runner.service << EOF

zhangguanzhang

// client.go
package main

import (
	"fmt"
	"log"
	"net/rpc"
	"net/rpc/jsonrpc"

	"github.com/gorilla/websocket"

zhangguanzhang

# https://github.com/jinwyp/one_click_script/blob/master/install_kernel.sh
# https://vault.centos.org/altarch/7.8.2003/kernel/x86_64/Packages/

altarch_kernel_name="kernel"
altarch_kernel_version="4.19.113-300"
altarchDownloadUrl="https://vault.centos.org/altarch/7.8.2003/kernel/x86_64/Packages"
wget ${altarchDownloadUrl}/${altarch_kernel_name}-${altarch_kernel_version}.el7.x86_64.rpm
wget ${altarchDownloadUrl}/${altarch_kernel_name}-core-${altarch_kernel_version}.el7.x86_64.rpm
wget ${altarchDownloadUrl}/${altarch_kernel_name}-devel-${altarch_kernel_version}.el7.x86_64.rpm
wget ${altarchDownloadUrl}/${altarch_kernel_name}-headers-${altarch_kernel_version}.el7.x86_64.rpm

zhangguanzhang

// You can edit this code!
// Click here and start typing.
package main

import (
	"fmt"
	"sync"
	"time"
)

zhangguanzhang

fork 后本地仓库添加，这里例如 skopeo

1. 先添加上游

git remote add upstream https://github.com/containers/skopeo.git

2. 拉取上游

zhangguanzhang

import json,base64
import requests, re
from collections import Counter

class DockerRegistryClient(object):
    def __init__(self, registry="http://reg.xxx.xxx:5000", auth='xxx:xxxxx', api_timeout=None):
        self.registry = registry
        self.auth = auth
        self.method_kwargs = {}
        self.scheme = 'application/vnd.docker.distribution.manifest.v2+json'

zhangguanzhang

离线环境来从现场获取docker的pprof信息步骤

获取go的镜像

while read img;
  do docker run --rm --entrypoint go $img version 2>/dev/null | grep -qw version && { echo $img;break; }; 
done < <(docker images --format '{{.Repository}}:{{.Tag}}')

zhangguanzhang

```
wget https://github.com/multiarch/qemu-user-static/releases/download/v3.0.0/qemu-x86_64-static.tar.gz
docker run --privileged -ti --rm --name flannel --net host -e GOARCH=amd64 \
    --cap-add=NET_ADMIN --cap-add=SYS_ADMIN \
    -u $( id -u):$( id -g) \
    -v $PWD/dist/qemu-amd64-static:/usr/bin/qemu-amd64-static \
    -v $PWD:/go/src/github.com/coreos/flannel:ro \
    -v $PWD/dist:/go/src/github.com/coreos/flannel/dist \
    -v /run:/run \
    --workdir=/go/src/github.com/coreos/flannel \

zhangguanzhang

# 取无法拉取镜像名
kubectl get po `kubectl get pod -o wide | grep Image | awk '{print $1}'` -o yaml | grep -Po 'image: \K\S+' | sort -u

# docker save -o images.tar.gz \

imgList=""
while read img;do
  if docker inspect $img &>/dev/null;then
    imgList+="$imgList $img"
  fi

zhangguanzhang

#!/bin/bash

# dnsConfig
kubectl -n kafka patch deployments kafka-0 -p '{"spec":{"template":{"spec":{"dnsConfig":{"options":[{"name":"single-request-reopen"}]}}}}}'

# dnsOptions
kubectl patch deploy $name \
  -p '{"spec":{"template":{"spec":{"dnsConfig":{"options":[{"name":"single-request-reopen"}]}}}}}'

function t(){