- For each “piece of code” you have nodes where code will be executed.
In puppet thou, it is vice versa.
- Orchestration. Macro events can be scheduled easily i.e. inter-nodes dependencies. Inter-action dependencies.
E.g. live migration of the whole distributed cloud web app ( all the load balancers, web-/db-/cache servers) from one cloud vendor to another, can be achieved with an Ansible playbook. Because Ansible is declarative language that in some cases can be used as a Bash script.
- consequences are important & can be leveraged. E.g. action1 on nodes1 before action2 on nodes2. In Puppet nodes don’t know about each other.
- Ansible works via SSH connection, so you even can reboot the server & wait till it is booted up again, then execute something on it right after reboot. Everything via Ansible.
- signing/revoking SSL certificates in Puppet is s hell comparing to SSH access which is enough for Ansible. With Ansible you only need SSH access, no agents/masters.
Initiator/Ansible model is better than
polling a server/Puppet. No need to invent (GEO) caches on 100+ nodes Puppet-setup.
- Some Ansible code can be executed hourly, some monthly, some ad-hoc manually. Hardly possible in puppet.
- No need to install agent software on node. Python is enough.
- It is difficult to find a module per your needs. Really, how can I trust the author of a module? Some modules provide what I need but abandoned, some are new but too simple.
- Yaml sucks. Those nasty spaces VS tabs, formatting is something I havent been familiar with: some notions of YAML structure ( multiline VS single line). And YAML looks like Windows Registry!
- Bad reports. Really, I need to know what happened after Ansible run & track history of runs.
- Bad logging. What I am seeing on the screen, doesnt reflect major things I expect: what changed & how. How means the diff betwen it had been & had became.
- Speed. O Lord, Ansible is slow. It takes 40 sec to apply a playbook with SSHD + Fail2ban + NRPE + APT roles. Technically it means to place a bunch of files based on templates & restart some services upon changes. I bet on Puppet it would take 10 sec.