docker容器中bash: top: command not found的解决方法

你的名字 2022-12-15 11:15 231阅读 0赞

新部署了一个MySQL的docker容器，插入10万测试数据时，想看下内存和CPU的占用情况，进入容器后运行top，报错bash: top: command not found，docker果然是最简形式，没有多余的东西。

那就apt-get update一下呗，继续报错

root@ad7556******:/# apt-get update
    Err:1 http://deb.debian.org/debian buster InRelease                                                 
      Temporary failure resolving 'deb.debian.org'
    Err:2 http://security.debian.org/debian-security buster/updates InRelease                           
      Temporary failure resolving 'security.debian.org'
    Err:3 http://repo.mysql.com/apt/debian buster InRelease                                             
      Temporary failure resolving 'repo.mysql.com'
    Err:4 http://deb.debian.org/debian buster-updates InRelease                                         
      Temporary failure resolving 'deb.debian.org'
    Reading package lists... Done    
    W: Failed to fetch http://deb.debian.org/debian/dists/buster/InRelease  Temporary failure resolving 'deb.debian.org'
    W: Failed to fetch http://security.debian.org/debian-security/dists/buster/updates/InRelease  Temporary failure resolving 'security.debian.org'
    W: Failed to fetch http://deb.debian.org/debian/dists/buster-updates/InRelease  Temporary failure resolving 'deb.debian.org'
    W: Failed to fetch http://repo.mysql.com/apt/debian/dists/buster/InRelease  Temporary failure resolving 'repo.mysql.com'
    W: Some index files failed to download. They have been ignored, or old ones used instead.

**需要修改获取包的地址**  
1、切换到 apt主目录

cd /etc/apt/

2、备份一下source.list

cp source.list source.list_backup

3、修改source.list，即apt源列表

echo "deb http://mirrors.163.com/debian stretch main">>sources.list
    echo "deb http://security.debian.org/debian-security stretch/updates main">>sources.list
    echo "deb http://mirrors.163.com/debian stretch-updates main">>sources.list

再运行，继续报错

root@ad75565******:/etc/apt# apt-get update
    Err:1 http://security.debian.org/debian-security buster/updates InRelease                                                              
      Temporary failure resolving 'security.debian.org'
    Err:2 http://mirrors.aliyun.com/debian-security buster/updates InRelease                                                               
      Temporary failure resolving 'mirrors.aliyun.com'
    Err:3 http://repo.mysql.com/apt/debian buster InRelease                                                                                
      Temporary failure resolving 'repo.mysql.com'
    Err:4 http://deb.debian.org/debian buster InRelease                                                                                    
      Temporary failure resolving 'deb.debian.org'
    Err:5 http://deb.debian.org/debian buster-updates InRelease
      Temporary failure resolving 'deb.debian.org'
    Reading package lists... Done    
    W: Failed to fetch http://deb.debian.org/debian/dists/buster/InRelease  Temporary failure resolving 'deb.debian.org'
    W: Failed to fetch http://security.debian.org/debian-security/dists/buster/updates/InRelease  Temporary failure resolving 'security.debian.org'
    W: Failed to fetch http://deb.debian.org/debian/dists/buster-updates/InRelease  Temporary failure resolving 'deb.debian.org'
    W: Failed to fetch http://mirrors.aliyun.com/debian-security/dists/buster/updates/InRelease  Temporary failure resolving 'mirrors.aliyun.com'
    W: Failed to fetch http://repo.mysql.com/apt/debian/dists/buster/InRelease  Temporary failure resolving 'repo.mysql.com'
    W: Some index files failed to download. They have been ignored, or old ones used instead.

想ping一下外面的域名看通不通的，报bash: ping: command not found

查资料得，要**修改docker的dns**

vim /etc/docker/daemon.json

编辑信息：

{
        "dns": ["202.96.209.5","8.8.8.8"]
    }

重启Docker服务

systemctl daemon-reload
    systemctl restart docker

这次update成功了

root@ad7556******:/# apt-get update
    Get:1 http://mirrors.aliyun.com/debian-security buster/updates InRelease [65.4 kB]                                                     
    Get:2 http://security.debian.org/debian-security buster/updates InRelease [65.4 kB]                                                                                                     
    Get:3 http://repo.mysql.com/apt/debian buster InRelease [21.5 kB]                                                                                     
    Get:4 http://mirrors.aliyun.com/debian-security buster/updates/main Sources [140 kB]                                     
    Get:5 http://repo.mysql.com/apt/debian buster/mysql-5.7 amd64 Packages [5668 B]                                       
    Get:6 http://security.debian.org/debian-security buster/updates/main amd64 Packages [234 kB]
    Get:7 http://deb.debian.org/debian buster InRelease [121 kB]                                                                                                                                                                                                                 
    Get:8 http://deb.debian.org/debian buster-updates InRelease [51.9 kB]                                                                                                                                                                                                        
    Get:9 http://deb.debian.org/debian buster/main amd64 Packages [7906 kB]                                                                                                                                                                                                      
    Get:9 http://deb.debian.org/debian buster/main amd64 Packages [7906 kB]                                                                                                                                                                                                      
    Get:10 http://deb.debian.org/debian buster-updates/main amd64 Packages [7868 B]                                                                                                                                                                                              
    Fetched 6835 kB in 9min 31s (12.0 kB/s)                                                                                                                                                                                                                                      
    Reading package lists... Done

满以为离成功很近，谁知

root@ad7556******:/etc/apt# apt-get install -y top
    Reading package lists... Done
    Building dependency tree       
    Reading state information... Done
    E: Unable to locate package top

查看docker容器的linux版本才知道

root@ad7556592188:/etc/apt# cat /etc/issue      
    Debian GNU/Linux 10 \n \l

不支持top命令  
直接运行

apt-get install busybox
    busybox top

期待以久的界面出来了

Mem: 880952K used, 114732K free, 0K shrd, 47K buff, 94572469032272K cached
    CPU:   0% usr   0% sys   0% nic  99% idle   0% io   0% irq   0% sirq
    Load average: 0.01 0.07 0.10 3/217 3352
      PID  PPID USER     STAT   VSZ %VSZ %CPU COMMAND
        1     0 mysql    S    1089m 112%   0% mysqld
       72     0 root     S     3988   0%   0% bash
     3352    72 root     R     3008   0%   0% busybox top

可以直接输入top就运行吗？可以

root@ad7556******:/etc/apt# cd /bin
    root@ad7556******:/bin# ln -s busybox top
    root@ad7556******:/bin# top
    Mem: 880952K used, 114732K free, 0K shrd, 0K buff, 94748724648384K cached
    CPU:   0% usr   0% sys   0% nic 100% idle   0% io   0% irq   0% sirq
    Load average: 0.00 0.05 0.10 3/217 3354
      PID  PPID USER     STAT   VSZ %VSZ %CPU COMMAND
        1     0 mysql    S    1089m 112%   0% mysqld
       72     0 root     S     3988   0%   0% bash
     3354    72 root     R     2924   0%   0% top

终于解决，希望对大家有帮助哈~~