ansible练习六

1. 给 node1 添加一块 5G 的硬盘；给 node2 添加一块 2G 的硬盘；node3 不添加硬盘。

2. 写一个 partition.yml 的 playbook，满足如下要求：

   • 给所有的受控主机创建分区，创建 2500M 的分区，然后对分区进行格式化，格式化为 xfs 的 文件系统。

   • 如果不能满足创建 2500M 的分区，则显示错误消息为：disk size not enough，接着改为创 建 1000M。

   • 如果没有 /dev/sdb 硬盘，则显示错误消息为：the device is not sdb

添加硬盘

# node1
[root@node1 ~]#lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part
  ├─cs-root 253:0 0 17G 0 lvm /
  └─cs-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 5G 0 disk
sr0 11:0 1 9G 0 rom
# node2
[root@node2 ~]#lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part
  ├─cs-root 253:0 0 17G 0 lvm /
  └─cs-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 2G 0 disk
sr0 11:0 1 9G 0 rom
# node3
[root@node3 ~]#lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 19G 0 part
  ├─cs-root 253:0 0 17G 0 lvm /
  └─cs-swap 253:1 0 2G 0 lvm [SWAP]
sr0 11:0 1 9G 0 rom

编写playbook

[root@ansible ~]#su - student
[student@ansible ~]$cd ansible/
[student@ansible ~/ansible]$vim partition.yml
---
- name: parted for node1
  hosts: all
  tasks:
	- name: create partition 2500M
	  block:
		- name: parted
		  parted:
			device: /dev/sdb
			number: 1
			part_type: primary
			part_start: 10MiB
			part_end: 2510MiB
			state: present
		rescue:
		  - name: output fail message
		  debug:
			msg: disk size not enough.
		  - name: create partition 1000M
			parted:
			  device: /dev/sdb
			  number: 1
			  part_type: primary
			  part_start: 10MiB
			  part_end: 1010MiB
			  state: present
		always:
		  - name: format
		  	filesystem:
		      fstype: xfs
			  dev: /dev/sdb
		when: "ansible_devices.sdb is defined"
    - name: search not exists
	  debug:
		msg: the device is not sdb
	  when: "ansible_devices.sdb is not defined"
[student@ansible ~/ansible]$ansible-playbook partition.yml
PLAY [parted for node1]
********************************************************************************
****************
TASK [Gathering Facts]
********************************************************************************
*****************
ok: [node1]
ok: [node2]
ok: [node3]
TASK [parted]
********************************************************************************
**************************
skipping: [node3]
fatal: [node2]: FAILED! => {"changed": false, "err": "Error: The location
2510MiB is outside of the device /dev/sdb.\n", "msg": "Error while running
parted script: /sbin/parted -s -m -a optimal /dev/sdb -- unit KiB mklabel msdos
mkpart primary 10MiB 2510MiB", "out": "", "rc": 1}
changed: [node1]
TASK [output fail message]
********************************************************************************
*************
ok: [node2] => {
"msg": "disk size not enough."
}
TASK [create partition 1000M]
********************************************************************************
**********
changed: [node2]
TASK [format]
********************************************************************************
**************************
skipping: [node3]
changed: [node2]
changed: [node1]
TASK [search not exists]
********************************************************************************
***************
skipping: [node1]
skipping: [node2]
ok: [node3] => {
"msg": "the device is not sdb"
}
PLAY RECAP
********************************************************************************
*****************************
node1 : ok=3 changed=2 unreachable=0 failed=0
skipped=1 rescued=0 ignored=0
node2 : ok=4 changed=2 unreachable=0 failed=0
skipped=1 rescued=1 ignored=0
node3 : ok=2 changed=0 unreachable=0 failed=0
skipped=2 rescued=0 ignored=0