ansible 从 2.7.11 升级到 2.8.1 产生的问题处理办法

配置文件变化

导致读不到 inventory，同时使用两种格式可以兼容各个版本，如下

cat .ansible.cfg
[defaults]
# inventory control group_vars
# < 2.8
hostfile       = xxx
# >=2.8
inventory      = xxx

ansible 内置变量变化

ansible_distribution_version 在 centos 上在 2.7.11 和 2.8.1 结果不同，导致相同的 playbook 在升级 ansible 后无法正常运行

观察 ubuntu 和 centos 的相关变量如下，最终采用 ansible_lsb.release 来代替 ansible_distribution_version ，可以加绒Ubuntu 和 centos 中ansible 的各个版本。

# on ubuntu trusty
## ansible 1.5.4
root@iZhp33qecbruyuw1awh6rfZ:~# ansible localhost -m setup -a "filter=ansible_os_family"
localhost | success >> {
    "ansible_facts": {
        "ansible_os_family": "Debian"
    },
    "changed": false
}
root@iZhp33qecbruyuw1awh6rfZ:~# ansible localhost -m setup -a "filter=ansible_distribution_version"
localhost | SUCCESS => {
    "ansible_facts": {
        "ansible_distribution_version": "14.04"
    },
    "changed": false
}
root@iZhp33qecbruyuw1awh6rfZ:~# ansible localhost -m setup -a "filter=ansible_lsb"
localhost | success >> {
    "ansible_facts": {
        "ansible_lsb": {
            "codename": "trusty",
            "description": "Ubuntu 14.04.5 LTS",
            "id": "Ubuntu",
            "major_release": "14",
            "release": "14.04"
        }
    },
    "changed": false
}

## ansible 2.8.1
root@iZhp33qecbruyuw1awh6rfZ:~# ansible localhost -m setup -a "filter=ansible_os_family"
localhost | SUCCESS => {
    "ansible_facts": {
        "ansible_os_family": "Debian"
    },
    "changed": false
}
root@iZhp33qecbruyuw1awh6rfZ:~# ansible localhost -m setup -a "filter=ansible_distribution_version"
localhost | SUCCESS => {
    "ansible_facts": {
        "ansible_distribution_version": "14.04"
    },
    "changed": false
}
root@iZhp33qecbruyuw1awh6rfZ:~# ansible localhost -m setup -a "filter=ansible_lsb"
localhost | success >> {
    "ansible_facts": {
        "ansible_lsb": {
            "codename": "trusty",
            "description": "Ubuntu 14.04.5 LTS",
            "id": "Ubuntu",
            "major_release": "14",
            "release": "14.04"
        }
    },
    "changed": false
}

# on centos 7.5
## ansible 2.7.11
[root@node11 ~]# ansible localhost -m setup -a "filter=ansible_os_family"
localhost | SUCCESS => {
    "ansible_facts": {
        "ansible_os_family": "RedHat"
    },
    "changed": false
}
[root@node11 ~]# ansible localhost -m setup -a "filter=ansible_distribution_version"
localhost | SUCCESS => {
    "ansible_facts": {
        "ansible_distribution_version": "7.5.1804"
    },
    "changed": false
}
[root@node11 ~]# ansible localhost -m setup -a "filter=ansible_lsb"
localhost | SUCCESS => {
    "ansible_facts": {
        "ansible_lsb": {
            "codename": "Core",
            "description": "CentOS Linux release 7.5.1804 (Core)",
            "id": "CentOS",
            "major_release": "7",
            "release": "7.5.1804"
        }
    },
    "changed": false
}

## ansible 2.8.1
[root@node11 ~]# ansible localhost -m setup -a "filter=ansible_os_family"
localhost | SUCCESS => {
    "ansible_facts": {
        "ansible_os_family": "RedHat",
        "discovered_interpreter_python": "/usr/bin/python"
    },
    "changed": false
}
[root@node11 ~]# ansible localhost -m setup -a "filter=ansible_distribution_version"
localhost | SUCCESS => {
    "ansible_facts": {
        "ansible_distribution_version": "7"
    },
    "changed": false
}
[root@node11 ~]# ansible localhost -m setup -a "filter=ansible_lsb"
localhost | SUCCESS => {
    "ansible_facts": {
        "ansible_lsb": {
            "codename": "Core",
            "description": "CentOS Linux release 7.5.1804 (Core)",
            "id": "CentOS",
            "major_release": "7",
            "release": "7.5.1804"
        }
    },
    "changed": false
}