工作中笔记
1 机器内存配置
临时配置
pssh -i -h hostlist.txt ‘sudo su - root -c “echo 2048000 > /proc/sys/vm/min_free_kbytes”’
永久配置
pssh -i -h hostlist.txt “sudo su - root -c ‘sed -i “s#vm.min_free_kbytes = 90112#vm.min_free_kbytes = 2048000#” /etc/sysctl.conf’”
sysctl -p
pssh -i -h hostlist.txt -t 0 “sudo su - root -c ‘echo vm.min_free_kbytes = 2048000 >> /etc/sysctl.conf’”
pssh -i -h hostlist.txt -t 0 “sudo su - root -c ‘sysctl -p’”
pssh -i -h hostlist.txt “cat /proc/sys/vm/min_free_kbytes” | grep 2048000 | wc -l
pssh -i -h hostlist.txt “cat /etc/sysctl.conf” | grep vm.min_free_kbytes
2 磁盘检查
pssh -i -h hostlist.txt df -m /opt/huawei/data[1234] | awk ‘$4 < 1419200{print}’
3 清理机器缓存
pssh -i -h minion_ip_engine.txt -t 0 “sudo su - root -c ‘sync; echo 3 > /proc/sys/vm/drop_caches’”
#替换命令
cat hostlist.txt | tr “\n” “,”
4 CPU
cat /proc/cpuinfo | grep name | cut -f0 -d: | uniq -c cpu逻辑个数
cat /proc/cpuinfo |grep “cores” 每个CPU核心数
5 sed
13 sed
流编辑器，其实就是写好一些指令脚本，然后让一个文本流输入进来
通过编辑器的命令修改之后转化为另一个文本流
sed option 'script' file1 file2 ... sed 参数 ‘脚本(/pattern/action)’ 待处理文件
sed option -f scriptfile file1 file2 ... sed 参数 –f ‘脚本文件’ 待处理文件
sed -i ... 有-i表示将文本修改的内容重新写回去
p, print 打印
sed '1p' 打印第一行
a, append 追加
sed '3a aaa' 在第三行后面追加aaa
i, insert 插入
sed '3i aaa' 在第三行前面插入aaa
d, delete 删除
s, substitution 替换
符合什么内容就替换
sed 's/123/789' 将123替换为789
sed '行号+操作'
sed '/匹配模式/操作'
干掉 html的标签
<html><head><title>Hello World</title></head>
<body>Welcome to the world of regexp!</body></html>
sed ' s/<\w*>//g ; s###g' test.html
将匹配 正则 <\w*>的字符串都替换为空字符串
将匹配 正则 </\w*>的字符串都替换为空字符串
sed -i 's/--queryFeHost=10.189.40.125/--queryFeHost=10.188.251.212/g' /opt/huawei/data2/instance_themes/run/qrwt.gflags
sed -i "s#--queryFeUrl=/lightning/SparkleSearchImage/query_fe/0#--queryFeUrl=/lightning/searchonline/image_query_fe/1.0.0#" /opt/huawei/data2/instance_themes/run/qrwt.gflags
sed -i "469c --tag_switch=0" /opt/huawei/data1/instance1/run/config.gflags
sed -i '$a* pe\t true ' /opt/huawei/data1/imgsrch_merger_RuleData/intervene_all_search_immerse_file.txt
6 atop
# 进入atop 文件目录
cd /var/log/atop
# 按时间排序文件
ls -1t
#显示如下
atop_20220614
dummy_after
dummy_before
daily.log
atop_20220613
atop_20220612
atop_20220611
atop_20220610
atop_20220609
atop_20220608
atop_20220607
atop_20220606
# 找对应时间的文件
atop -r atop_20220613
# 输入b，进入交互式界面
# 输入时间，如10:00
# 跳转到指定时间的界面
# 输入g, 按照cpu 排序，查看那个程序的cpu 占用率比较高
快捷键 说明
b 输入时间，格式为"12:23"（时：分）
t 前进 10s
T 后退 10s
g 按 CPU 使用率排序，默认排序方式
m 按内存使用率降序排列
d 按磁盘使用率降序排列
y 查看线程信息
j 查看 container 聚合信息
c 查看详细的 command line
l 定制化查看每个 CPU 核/每个磁盘/每个网卡的信息
f 展示全局指标中 fixed 的指标
Q 根据进程状态过滤，如 R|S|D|Z 等
I 按照 PID 进行搜索（注：大写的 i）
原文链接：https://blog.csdn.net/ByteDanceTech/article/details/122007542
# 7
netsh interface portproxy add v4tov4 listenaddress=172.16.0.253 listenport=20000 connectaddress=127.0.0.1 connectport=10001
export http_proxy=http://172.16.0.253:20000
export https_proxy=http://172.16.0.253:20000
# 8 端口映射
ssh -L 192.192.100.44:9902:127.0.0.1:9902 root@localhost
# 9 launch.json
```c
{
"version": "0.2.0",
"configurations": [
{
"name": "envoy",
"type": "cppdbg",
"request": "launch",
"program": "${workspaceFolder}/bazel-bin/envoy",
"args": [
"-c",
// "${workspaceFolder}/config/waf.yaml"
// "${workspaceFolder}/config/web_socker.yaml"
"${workspaceFolder}/config/xds.yaml"
],
"stopAtEntry": false,
"cwd": "${workspaceFolder}",
"environment": [],
"externalConsole": false,
"MIMode": "gdb",
"sourceFileMap": {
"/root/.cache/bazel/_bazel_root/44290b59dab7a3ce9c46b1b308b992bb/execroot/envoy_filters": "${workspaceFolder}"
},
"setupCommands": [
{
"description": "为 gdb 启用整齐打印",
"text": "-enable-pretty-printing",
"ignoreFailures": true
},
{
"description": "将反汇编风格设置为 Intel",
"text": "-gdb-set disassembly-flavor intel",
"ignoreFailures": true
}
]
},
{
"name": "C/C++ Runner: Debug Session",
"type": "cppdbg",
"request": "launch",
"args": [],
"stopAtEntry": false,
"externalConsole": false,
"cwd": "/root/envoy-filters/filters/source/extensions/filters/http/strong_global_ratelimit",
"program": "/root/envoy-filters/filters/source/extensions/filters/http/strong_global_ratelimit/build/Debug/outDebug",
"MIMode": "gdb",
"miDebuggerPath": "gdb",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
]
}
]
}