Showing which roles have been run on a machine

[Gabriel Forster]

Is there a standard way to show which roles have been installed on a target machine from that machine? 

e.g. Ansible control machine installs Apache & MySQL on Remote1 and Nginx & MySQL on Remote2. If I SSH into Remote2, can it tell me that Ansible successfully installed Nginx & MySQL?

Alternatively, is there a good/accepted way to drop a file on a target machine that lists what roles were installed on it?

[Maciej Delmanowski]

Most of my Ansible roles create local Ansible facts, usually to create some internal variables used by the role, or to mark a particular service as installed for conditional checks. Since the Ansible facts are consitently named after the roles that created them, when I check a host to see what facts are installed, I can see at a glance what roles were executed on a host:

root@host:~# ls -l /etc/ansible/facts.d/

total 104

-rwxr-xr-x 1 root root 2977 Jul  6 08:27 apt.fact*

-rw-r--r-- 1 root root   25 Jul  6 08:29 apt_install.fact

-rwxr-xr-x 1 root root  937 Jul  6 08:27 apt_listchanges.fact*

-rw-r--r-- 1 root root   69 Jul  6 08:25 atd.fact

-rwxr-xr-x 1 root root  983 Jul  6 08:24 cap12s.fact*

-rwxr-xr-x 1 root root 1889 Jul  6 08:24 core.fact*

-rwxr-xr-x 1 root root 1375 Jul  6 08:24 debops_fact.fact*

-rw-r--r-- 1 root root  305 Jul  6 08:25 dhparam.fact

-rw-r--r-- 1 root root   39 Jul  6 08:24 environment.fact

-rw-r--r-- 1 root root   89 Jul  6 08:32 ferm.fact

-rwxr-xr-x 1 root root  434 Jul  6 08:24 init.fact*

-rwxr-xr-x 1 root root  565 Jul  6 12:06 nginx.fact*

-rwxr-xr-x 1 root root 1612 Jul  6 08:30 nsswitch.fact*

-rw-r--r-- 1 root root   39 Jul  6 08:33 ntp.fact

-rwxr-xr-x 1 root root 1319 Jul  6 08:26 pki.fact*

-rwxr-xr-x 1 root root 1013 Jul  6 08:33 proc.fact*

-rwxr-xr-x 1 root root 1508 Jul  6 09:24 rabbitmq_server.fact*

-rwxr-xr-x 1 root root  757 Jul  6 08:24 resolver.fact*

-rw-r--r-- 1 root root  452 Jul  6 08:24 root.fact

-rwxr-xr-x 1 root root  665 Jul  6 08:33 root_account.fact*

-rwxr-xr-x 1 root root 1197 Jul  6 08:35 sshd.fact*

-rw-r--r-- 1 root root   16 Jul  6 08:24 tags.fact

-rw-r--r-- 1 root root   49 Jul  6 08:32 tcpwrappers.fact

-rwxr-xr-x 1 root root  131 Jul  6 08:24 timezone.fact*

-rw-r--r-- 1 root root   93 Jul  6 08:35 unattended_upgrades.fact

-rw-r--r-- 1 root root   39 Jul  6 08:24 uuid.fact

Cheers,

Maciej Delmanowski

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