包含标签 2019 的文章

Ansible知识点

2019年11月13日
| Ansible

1. 指定单个ip运行（使用root用户)

ansible all -i 10.10.120.255, -m ping -u root  
 #检测连接是否正常
 10.10.120.255 | SUCCESS => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/bin/python"
    }, 
    "changed": false, 
    "ping": "pong"
}

还有setup模块打印出的信息，在使用变量/判断的时候可以拿到很多有用的信息，比如指定操作系统平台或版本信息

……

阅读全文

sed常用命令

2019年7月1日
| Linux

001 删除1-10行

1

sed '1,10d' file

002 删除换行

1
2
3

sed ':label;N;s/\n//;b label' 

sed ':a;N;$!ba;s/\n//g' /root/.ssh/authorized_keys

003 分组并格式化

……

阅读全文

Rpm_install_err

2019年6月29日
| Linux Error 
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61

yum instal gcc

Protected multilib versions: libgomp-4.8.5-28.el7.i686 != libgomp-4.8.5-28.el7_5.1.x86_64

[root@v-ct-dsjpaas-app-02 memcached-1.5.12]# rpm --erase --nodeps libgomp
[root@v-ct-dsjpaas-app-02 memcached-1.5.12]# yum install libgomp
[root@v-ct-dsjpaas-app-02 memcached-1.5.12]# yum install gcc

Error: Package: libstdc++-devel-4.8.5-28.el7.x86_64 (c7-media)
           Requires: libstdc++(x86-64) = 4.8.5-28.el7
           Installed: libstdc++-4.8.5-28.el7_5.1.x86_64 (@updates)
               libstdc++(x86-64) = 4.8.5-28.el7_5.1
           Available: libstdc++-4.8.5-28.el7.x86_64 (c7-media)
               libstdc++(x86-64) = 4.8.5-28.el7
Error: Package: gcc-c++-4.8.5-28.el7.x86_64 (c7-media)
           Requires: libstdc++ = 4.8.5-28.el7
           Installed: libstdc++-4.8.5-28.el7_5.1.i686 (@updates)
               libstdc++ = 4.8.2-16.el7_5
               libstdc++ = 4.8.5-28.el7_5.1
           Available: libstdc++-4.8.5-28.el7.i686 (c7-media)
               libstdc++ = 4.8.5-28.el7
               libstdc++ = 4.8.2-16.el7
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

 [root@v-ct-dsjpaas-app-03 nginx-1.10.3]# rpm -e --nodeps libstdc++-4.8.5-28.el7_5.1.x86_64
[root@v-ct-dsjpaas-app-03 nginx-1.10.3]# yum install gcc-c++

Error:  Multilib version problems found. This often means that the root
       cause is something else and multilib version checking is just
       pointing out that there is a problem. Eg.:
       
         1. You have an upgrade for libstdc++ which is missing some
            dependency that another package requires. Yum is trying to
            solve this by installing an older version of libstdc++ of the
            different architecture. If you exclude the bad architecture
            yum will tell you what the root cause is (which package
            requires what). You can try redoing the upgrade with
            --exclude libstdc++.otherarch ... this should give you an error
            message showing the root cause of the problem.
       
         2. You have multiple architectures of libstdc++ installed, but
            yum can only see an upgrade for one of those architectures.
            If you don't want/need both architectures anymore then you
            can remove the one with the missing update and everything
            will work.
       
         3. You have duplicate versions of libstdc++ installed already.
            You can use "yum check" to get yum show these errors.
       
       ...you can also use --setopt=protected_multilib=false to remove
       this checking, however this is almost never the correct thing to
       do as something else is very likely to go wrong (often causing
       much more problems).
       
       Protected multilib versions: libstdc++-4.8.5-28.el7.x86_64 != libstdc++-4.8.5-28.el7_5.1.i686
[root@v-ct-dsjpaas-app-03 nginx-1.10.3]# rpm -e --nodeps libstdc++
                                         yum install libstdc++.so.6
[root@v-ct-dsjpaas-app-03 nginx-1.10.3]# yum install gcc-c++

rpm -e --nodeps libcom_err
……

阅读全文

半连接队列

2019年6月24日
| TCP/IP

抓包相关

SACK_PERM=1
SACK:  选择确认，只传送缺少的数据而不重传已经正确到达接送方的数据。

半连接队列 net.ipv4.tcp_max_syn_backlog

……

阅读全文

Elasticsearch迁移工具

2019年2月26日
| ELK

迁移工具地址： https://github.com/medcl/esm

迁移脚本

#!/bin/bash

filter_time=`date +%Y-%m-%d -d "-8 days"`
index_arr=(es_collect es_keyword es_app)
prod_es="http://:9200"
pre_es="http://:19200"


for i in ${index_arr[@]}
  do
  echo "$i start rync." >> ./es_rync.log
  echo "`date`" >> ./es_rync.log
  ./migrator-linux-amd64 -s ${prod_es} -d ${pre_es} -x $i -q=cycle_time:${filter_time} -y $i -w=1 -b=1
  echo "`date` done." >> ./es_rync.log
  echo "done"
  #exit 100
done
……

阅读全文