随着ansilbe playbook 用的越来越多，我们也开始接触许多高级filter 例如selectattr 举个例子：
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--- users: - name: john email: john@example.com - name: jane email: jane@example.com - name: fred email: fred@example.com password: 123!abc |
如果我们执行如下的task
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- set_fact: emails: "{{ users | selectattr('password', 'undefined') | map(attribute='email') | list }}" |
首先，我们定义的users会被传递给selectatt……
首先，我们要移除旧版本docker:
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$ sudo yum remove docker \ docker-client \ docker-client-latest \ docker-common \ docker-latest \ docker-latest-logrotate \ docker-logrotate \ docker-engine |
然后就是安装新版本： 准备工作必要工具：
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$ sudo yum install -y yum-utils \ device-mapper-persistent-data \ lvm2 |
设置repo:
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$ sudo yum-config-manager \ --add-repo \ https://download.docker.com/linux/centos/docker-ce.repo |
安装： [crayon-5d3485dd3f2……
因为我们要在docker中监控主机，但是默认情况下容器中是看不到主机的进程，也看不到主机的网络的….. 而且，容器中的root其实只是一个普通用户….. 例如：
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[root@docker ~]# docker run -it centos Unable to find image 'centos:latest' locally Trying to pull repository docker.io/library/centos ... latest: Pulling from docker.io/library/centos 8ba884070f61: Pull complete Digest: sha256:8d487d68857f5bc9595793279b33d082b03713341ddec91054382641d14db861 [root@0df145a906bf /]# ps PID TTY TIME CMD 1 ? 00:00:00 bash 13 ? 00:00:00 ps [root@0df145a906bf /]# |
如果想改变这些，我们就需要加入以下特殊的启动参数，我们逐一介绍： –priv……
安装好server端之后，我们就要安装zabbix-agent了，这个，我们也可以找到镜像 登录需要被监控的主机： 1：iptables必须打开 2：docker 必须安装 3：端口10050必须打开
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docker run --name my-zabbix-agent2 -p 10050:10050 -e ZBX_HOSTNAME="当前主机名称" -e ZBX_SERVER_HOST="server端ip地址" -d zabbix/zabbix-agent:latest |
其中： my-zabbix-agent2 为docker启动的容器名称 ……
看例子吧： 安装screen
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# yum install screen <snip> Dependencies Resolved ================================================================================= Package Arch Version Repository Size ================================================================================= Installing: screen i686 4.0.3-16.el6 rhel-6-server-rpms 484 k <snip> Installed: screen.i686 0:4.0.3-16.el6 Complete! |
查看历史，获取编号：
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# yum history Loaded plugins: product-id, refresh-packagekit, subscription-manager Updating Red Hat repositories. ID | Login user | Date and time | Action(s) | Altered ------------------------------------------------------------------------------- 8 | root <root> | 2011-10-03 14:40 | Install | 1 7 | root <root> | 2011-09-21 04:24 | Install | 1 ## 6 | root <root> | 2011-09-21 04:23 | Install | 1 ## 5 | root <root> | 2011-09-16 13:35 | Install | 1 4 | root <root> | 2011-09-16 13:33 | Erase | 1 3 | root <root> | 2011-09-14 14:36 | Install | 1 2 | root <root> | 2011-09-12 15:48 | I, U | 80 1 | System <unset> | 2011-09-12 14:57 | Install | 1025 |
undo 撤销：
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# yum history undo 8 Loaded plugins: product-id, refresh-packagekit, subscription-manager Updating Red Hat repositories. Undoing transaction 8, from Mon Oct 3 14:40:01 2011 Install screen-4.0.3-16.el6.i686 Resolving Dependencies --> Running transaction check ---> Package screen.i686 0:4.0.3-16.el6 will be erased --> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Removing: screen i686 4.0.3-16.el6 @rhel-6-server-rpms 783 k <snip> Removed: screen.i686 0:4.0.3-16.el6 Complete! |
