I hope this proves useful for establishing a baseline security configuration for any servers you are building. All modules support a common set of connection and authentication parameters, aliases that enable you to specify the same connection and authentication-related options as the core modules, and the ability to specify the parameters inside a provider dictionary. Also when I ssh into said test-private-0, I do confirm that the expected changes are not applied to it. First, some Linux distributions have the adduser command, wihch is a shortcut with sensible defaults to the useradd command. One other special behavior of handlers: they run only once even if notified by several different tasks.
The opinions expressed on this website are those of each author, not of the author's employer or of Red Hat. Someone new to Ansible will not be able to read your examples or make them work. How do I create a condition that says: when key authentication fails, prompt users for username and passwd? I think most people are sudoing from only one user account or using keys most of the time. Install and configure Now it is time to setup logwatch to send a daily summary email. In this case, we are ensuring the user exists and we are setting the password with the required variable. I will show you how to use the tools, and it is up to you to decide what to do with them.
In my next article, I will discuss the Copy, systemd, service, apt, yum, virt, and user modules. You can also edit the file with any editor, but if you save an incorrectly formatted version, you can easily lock yourself out from user root. Your mileage may vary and I encourage you to tweak things to fit your own requirements. When password-based authentication is used, the password argument is used as the password. Ansible often gets criticized for the fact that since it completely relies on the ssh protocol for implementing its automation.
This is where most of the instructions are located. Generating Password Strings The one thing I left off here is how to make a valid password string. Three tasks were 'ok', which means they ran without error. The useradd command needs to be told to do all of these things. However, I don't want to be prompted.
That is, unless it has been more than one hour since you last ran the playbook. I know that when you run your playbook initially you can prompt for root's ssh password by using --ask-pass. Finally the main section is indicated by tasks:. Here's a Ansible task file with a user definition for the above. If you would like to support his freely available work, you can do it via. The options you pass to this command can vary depending on where your server is hosted and how it is configured.
I work with a team of network engineers that are scared of linux, and I am trying to create a seamless user experience for my team. It can be edited manually using the visudo command or we can ask Ansible to edit it. This task also uses the clever feature of Ansible. Please let me know if you have any feedback! This is an annoying result of how the encryption is done when opening decrypting and closing re-encrypting a file for editing. For information about the arguments accepted for the individual modules, see the documentation for that module.
I'm not a huge fan of ansible's vault system for reasons like these. Using Ansible Vault A typical use of Ansible Vault is to encrypt variable files. No tasks changed anything, which means no change required. They are usually used to run programs. This can consume a significant amount of time if you have a large number of hosts. So, we end up running debconf-set-selections with the question, value and vtype defined in each item.
As a result of this, we would require password-less ssh authentication to be set up otherwise using ansible for automation would not prove very helpful if we have to type in the password for every host on which are executing the playbook. Thanks for taking the time to respond. Using Ansible Vault for passwords and other sensitive information is possible, but is outside the scope of this article. The ability to run ad hoc commands is useful for quick tasks, but what if you want to be able to run the same tasks later, in a repeatable fashion? Drop a comment and share your experience with Ansible here. When password-based authentication is used, the password argument is used as the password.
The vars: section, as one might imagine, is used to define variables that can be used throughout the playbook. No shell or home directory will be made unless specified otherwise. For more complex needs, consider the use of expect code with the or modules. We could use the -K and then it would ask for a password again, but instead of that we'd like to allow passwordless sudo commands on the other machine as well. Right now, when you run it without the -K flag, it just hangs there without telling the user what happened. In this case, I have groups for operating systems arch, ubuntu, centos, fedora , as well as server function ocp, satellite.
The private key stays locked up in my home directory. By its nature, this user will need to have root privileges, and in our case, that will be achieved via sudo. Hence the work around using --fork 1 as the I linked to above discusses. I had read about Ansible before, and I didn't proceed further. There are a variety of ways you can specify your inventory but for this example, we are just going to pass in the path to a basic inventory file into the Ansible command. That way, it could be more explicit. I just re-iterate the default here.