ansible模块--command模块

ansible模块--command模块

1.在远程主机上执行指定得命令 如：cat ls ，不能使用特殊得符号 ：| > >>

[root@ansible ansible]# ansible -i hosts mysql -m command -a "hostname"192.168.56.88 | CHANGED | rc=0 >>mysql8[root@ansible ansible]# ansible -i hosts mysql -m command -a "ip a"192.168.56.88 | CHANGED | rc=0 >>1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever2: enp0s3: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 08:00:27:dd:a6:08 brd ff:ff:ff:ff:ff:ff inet 192.168.56.88/24 brd 192.168.56.255 scope global noprefixroute enp0s3 valid_lft forever preferred_lft forever inet6 fe80::6ac2:72f:9232:585b/64 scope link noprefixroute valid_lft forever preferred_lft forever[root@ansible ansible]# ansible -i hosts mysql -m command -a "ls -l"192.168.56.88 | CHANGED | rc=0 >>total 4-rw-------. 1 root root 1715 Sep 12 14:36 anaconda-ks.cfg

2.如果使用ansible不支持的特殊字符，则抛错​

[root@ansible ansible]# ansible -i hosts mysql -m command -a "ls -l | grep an"192.168.56.88 | FAILED | rc=2 >>ls: cannot access |: No such file or directoryls: cannot access grep: No such file or directoryls: cannot access an: No such file or directorynon-zero return code

3.creates和removescreates：当指定文件存在时，后一条命令不执行 / 指定文件不存在，后一条命令执行removes：当指定文件存在时，后一条命令执行 / 指定文件不存在，后一条命令不执行

# /etc/fstab文件存在，则cat命令不执行[root@ansible ansible]# ansible -i hosts mysql -m command -a "creates=/etc/fstab cat /etc/fstab"192.168.56.88 | SUCCESS | rc=0 >>skipped, since /etc/fstab exists# /etc/fstab文件存在，则cat命令执行[root@ansible ansible]# ansible -i hosts mysql -m command -a "removes=/etc/fstab cat /etc/fstab"192.168.56.88 | CHANGED | rc=0 >>## /etc/fstab# Created by anaconda on Sun Sep 12 14:30:00 2021## Accessible filesystems, by reference, are maintained under '/dev/disk'# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info#/dev/mapper/rhel-root / xfs defaults 0 0UUID=747ccae3-a4b8-4b11-b77f-cd3d704f0e57 /boot xfs defaults 0 0/dev/mapper/rhel-swap swap swap defaults 0 0

ansible

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