Ansible:检测Linux文件系统是否以只读方式装载
我试图检测Linux(Ubuntu16.04)上是否以只读或读写方式安装了特定的文件系统。使用stat模块将不起作用,因为它总是返回posix权限,而不管写入目录的实际能力如何。我可以用下面的代码来完成这项工作,这些代码试图创建一个点文件。我希望有一个更干净、更优雅的替代方案,它还可以检测目录是否不是挂载点(这将是一个错误) Ansible建议我使用state=touch的文件模块,但是下面的代码失败了,因为似乎没有办法检查文件的临时结果 条件检查“shared\u dir\u write\u test.failed”和“read-only” 不在(共享目录写入测试文件较低)失败。错误是: 计算条件(共享\u目录\u写入\u测试)时出错。失败且 “只读”不在(shared_dir_write_test.stderr | lower)):“dict” 对象“”没有属性“失败”Ansible:检测Linux文件系统是否以只读方式装载,ansible,ubuntu-16.04,readonly,ansible-2.x,mount-point,Ansible,Ubuntu 16.04,Readonly,Ansible 2.x,Mount Point,我试图检测Linux(Ubuntu16.04)上是否以只读或读写方式安装了特定的文件系统。使用stat模块将不起作用,因为它总是返回posix权限,而不管写入目录的实际能力如何。我可以用下面的代码来完成这项工作,这些代码试图创建一个点文件。我希望有一个更干净、更优雅的替代方案,它还可以检测目录是否不是挂载点(这将是一个错误) Ansible建议我使用state=touch的文件模块,但是下面的代码失败了,因为似乎没有办法检查文件的临时结果 条件检查“shared\u dir\u write\u
这些信息可以从可靠的事实中获得。完成此操作的Ansible代码:
- name: Determine shared-dir mount point
command: "/usr/bin/env stat -c '%m' {{ shared_dir_real_path }}"
register: shared_dir_mount_point
changed_when: False
- name: Determine the mount point's filesystem type and mount options
set_fact:
"shared_dir_mount_{{ item }}": "{{ ansible_mounts | selectattr('mount', 'equalto', shared_dir_mount_point.stdout) | map(attribute = item) | join(',') }}"
with_items:
- fstype
- options
- name: Determine the access to the shared-data directory
set_fact:
shared_dir_access_flags: "{{ ['ro', 'rw'] | intersect( shared_dir_mount_options.split(',') )}}"
- name: Verify Access mode sanity
assert:
that: shared_dir_access_flags | length == 1
然后,为了确定安装是R/W还是R/O,我使用:
when: "'rw' in shared_dir_access_flags"
或
我以前使用的另一种更简洁但可能不太干净的方法是从/proc/self/mountinfo获取信息。比我希望的平台具体一点,但它只依赖于文档化的intreface
- name: Get Shared dir mount options
shell: "grep -F `stat -c '%m' {{ shared_dir_path }}` /proc/self/mountinfo | cut -d' ' -f 6"
register: shared_dir_mount_options
changed_when: False
然后,确定挂载是R/W还是R/O I的表达式将变得有点麻烦:
when: "'rw' in shared_dir_mount_options.stdout.split(',')"
或
这些信息可以从可靠的事实中获得。完成此操作的Ansible代码:
- name: Determine shared-dir mount point
command: "/usr/bin/env stat -c '%m' {{ shared_dir_real_path }}"
register: shared_dir_mount_point
changed_when: False
- name: Determine the mount point's filesystem type and mount options
set_fact:
"shared_dir_mount_{{ item }}": "{{ ansible_mounts | selectattr('mount', 'equalto', shared_dir_mount_point.stdout) | map(attribute = item) | join(',') }}"
with_items:
- fstype
- options
- name: Determine the access to the shared-data directory
set_fact:
shared_dir_access_flags: "{{ ['ro', 'rw'] | intersect( shared_dir_mount_options.split(',') )}}"
- name: Verify Access mode sanity
assert:
that: shared_dir_access_flags | length == 1
然后,为了确定安装是R/W还是R/O,我使用:
when: "'rw' in shared_dir_access_flags"
或
我以前使用的另一种更简洁但可能不太干净的方法是从/proc/self/mountinfo获取信息。比我希望的平台具体一点,但它只依赖于文档化的intreface
- name: Get Shared dir mount options
shell: "grep -F `stat -c '%m' {{ shared_dir_path }}` /proc/self/mountinfo | cut -d' ' -f 6"
register: shared_dir_mount_options
changed_when: False
然后,确定挂载是R/W还是R/O I的表达式将变得有点麻烦:
when: "'rw' in shared_dir_mount_options.stdout.split(',')"
或
您可以收集可靠的事实,每个装载都有装载选项:
ansible localhost -m setup -a "filter=ansible_mounts"
样本输出:
[root@ansible ansible]# ansible localhost -m setup -a "filter=ansible_mounts"
localhost | SUCCESS => {
"ansible_facts": {
"ansible_mounts": [
{
"block_available": 3007928,
"block_size": 4096,
"block_total": 3929600,
"block_used": 921672,
"device": "/dev/mapper/fedora-root",
"fstype": "xfs",
"inode_available": 7787042,
"inode_total": 7864320,
"inode_used": 77278,
"mount": "/",
"options": "rw,relatime,attr2,inode64,noquota",
"size_available": 12320473088,
"size_total": 16095641600,
"uuid": "5faf23bb-281b-41d9-bd20-f8da6463eba0"
},
{
"block_available": 185772,
"block_size": 4096,
"block_total": 249830,
"block_used": 64058,
"device": "/dev/sda1",
"fstype": "ext4",
"inode_available": 65179,
"inode_total": 65536,
"inode_used": 357,
"mount": "/boot",
"options": "rw,relatime,data=ordered",
"size_available": 760922112,
"size_total": 1023303680,
"uuid": "866845e7-6c62-41c9-bbd2-87b463326601"
}
]
},
"changed": false
}
[root@ansible ansible]# ansible localhost -m setup -a "filter=ansible_mounts"
您可以收集可靠的事实,每个装载都有装载选项:
ansible localhost -m setup -a "filter=ansible_mounts"
样本输出:
[root@ansible ansible]# ansible localhost -m setup -a "filter=ansible_mounts"
localhost | SUCCESS => {
"ansible_facts": {
"ansible_mounts": [
{
"block_available": 3007928,
"block_size": 4096,
"block_total": 3929600,
"block_used": 921672,
"device": "/dev/mapper/fedora-root",
"fstype": "xfs",
"inode_available": 7787042,
"inode_total": 7864320,
"inode_used": 77278,
"mount": "/",
"options": "rw,relatime,attr2,inode64,noquota",
"size_available": 12320473088,
"size_total": 16095641600,
"uuid": "5faf23bb-281b-41d9-bd20-f8da6463eba0"
},
{
"block_available": 185772,
"block_size": 4096,
"block_total": 249830,
"block_used": 64058,
"device": "/dev/sda1",
"fstype": "ext4",
"inode_available": 65179,
"inode_total": 65536,
"inode_used": 357,
"mount": "/boot",
"options": "rw,relatime,data=ordered",
"size_available": 760922112,
"size_total": 1023303680,
"uuid": "866845e7-6c62-41c9-bbd2-87b463326601"
}
]
},
"changed": false
}
[root@ansible ansible]# ansible localhost -m setup -a "filter=ansible_mounts"
重要提示来自这里:重要提示来自这里:谢谢,我在这里也建议了这个答案:谢谢,我最终修改了我的代码,所以现在它更接近你的方法,并相应地修改了我的答案。谢谢,我在这里也建议了这个答案:谢谢,我最终修改了我的代码,所以现在它更接近你的方法,并相应地修改了我的答案。