ansible模块command、shell、raw、script
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[root@node1 ansible]
# pwd
/etc/ansible
[root@node1 ansible]
# cat hosts
[testservers]
192.168.100.131
192.168.100.132
[root@node1 ansible]
#
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SYNOPSIS
ansible
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ansible-doc moduleName
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[root@node1 ansible]
# ansible-doc command
less
436
Copyright (C) 1984-2009 Mark Nudelman
less
comes with NO WARRANTY, to the extent permitted by law.
For information about the terms of redistribution,
see the
file
named README
in
the
less
distribution.
Homepage: http:
//www
.greenwoodsoftware.com
/less
> COMMAND
The [
command
] module takes the
command
name followed by a list of
space-delimited arguments. The given
command
will be executed on all
selected nodes. It will not be processed through the shell, so
variables like `$HOME
' and operations like `"<"'
, `
">"
', `"|"'
, and
`
"&"
' will not work (use the [shell] module
if
you need these
features).
Options (= is mandatory):
- chdir
cd
into this directory before running the
command
[Default:
None]
- creates
a filename, when it already exists, this step will *not* be
run. [Default: None]
- executable
change the shell used to execute the
command
. Should be an
absolute path to the executable. [Default: None]
= free_form
the
command
module takes a
free
form
command
to run. There is
no parameter actually named
'free form'
. See the examples!
[Default: None]
- removes
a filename, when it does not exist, this step will *not* be
run. [Default: None]
- warn
if
command
warnings are on
in
ansible.cfg,
do
not warn about
this particular line
if
set
to no
/false
. [Default: True]
Notes: If you want to run a
command
through the shell (say you are using
`<
', `>'
, `|', etc), you actually want the [shell] module
instead. The [
command
] module is much
more
secure as it's not
affected by the user
's environment. `creates'
, `removes', and
`chdir' can be specified after the
command
. For instance,
if
you only want to run a
command
if
a certain
file
does not
exist, use this.
EXAMPLES:
# Example from Ansible Playbooks.
-
command
:
/sbin/shutdown
-t now
# Run the command if the specified file does not exist.
-
command
:
/usr/bin/make_database
.sh arg1 arg2 creates=
/path/to/database
# You can also use the 'args' form to provide the options. This command
# will change the working directory to somedir/ and will only run when
# /path/to/database doesn't exist.
-
command
:
/usr/bin/make_database
.sh arg1 arg2
args:
chdir: somedir/
creates:
/path/to/database
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[root@node1 ansible]
# ansible testservers -m command -a 'tail -2 /etc/passwd'
192.168.100.131 | success | rc=0 >>
postfix:x:89:89::
/var/spool/postfix
:
/sbin/nologin
sshd:x:74:74:Privilege-separated SSH:
/var/empty/sshd
:
/sbin/nologin
192.168.100.132 | success | rc=0 >>
sshd:x:74:74:Privilege-separated SSH:
/var/empty/sshd
:
/sbin/nologin
tcpdump:x:72:72::/:
/sbin/nologin
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[root@node1 ansible]
# ansible testservers -m command -a 'pwd'
192.168.100.132 | success | rc=0 >>
/root
192.168.100.131 | success | rc=0 >>
/root
[root@node1 ansible]
# ansible testservers -m command -a 'chdir=/tmp/ pwd'
192.168.100.131 | success | rc=0 >>
/tmp
192.168.100.132 | success | rc=0 >>
/tmp
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关于ansbile工具的shell、command、script、raw模块的区别和使用场景
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[root@node1 ansible]
# ansible testservers -m command -a 'uname -n'
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[root@node1 ansible]
# ansible testservers -m script -a '/etc/ansible/test.sh
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[root@node1 ansible]
# ansible testservers -m shell -a 'bash /root/test.sh'
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[root@node1 ansible]
# ansible testservers -m raw -a "ifconfig eth0 |sed -n 2p |awk '{print \$2}' |awk -F: '{print \$2}'"
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