From there, you could pipe the output of grep into a command like uniq -c, which would count the unique occurrences of the word. To search in a string or extract parts of a string with a regular expression, use the ansible.builtin. To count the unique occurrences of a word using grep, you would first need to use grep to find all instances of the word in a given body of text. vars : vlan : key : " Searching strings with regular expressions This is often a better approach than failing if a variable is not defined: I will use the -i option to make sure STRING/StrING/string get captured properly. You can provide default values for variables directly in your templates using the Jinja2 ‘default’ filter. You can use a simple grep to capture the number of occurrences effectively. If you configure Ansible to ignore most undefined variables, you can mark some variables as requiring values with the mandatory filter. Therefore, the output highlights the following results: if. The result shows all instances where the letter i appears followed by an f in the. The regex searches for the character string. Searching strings with regular expressionsįilters can help you manage missing or undefined variables by providing defaults or making some variables optional. Run the following command to test how grep regex works: grep if. Hashing and encrypting strings and passwords Selecting from sets or lists (set theory) Selecting values from arrays or hashtables You can create custom Ansible filters as plugins, though we generally welcome new filters into the ansible-core repo so everyone can use them.īecause templating happens on the Ansible controller, not on the target host, filters execute on the controller and transform data locally.ĭefining different values for true/false/null (ternary)Ĭombining items from multiple lists: zip and zip_longest You can also use Python methods to transform data. You can use the Ansible-specific filters documented here to manipulate your data, or use any of the standard filters shipped with Jinja2 - see the list of built-in filters in the official Jinja2 template documentation. The key to this is in the lines used with grep. Use Gvim or Vim to read the resulting file, which will be called uniquevisits, which will list the unique ips in a column. Controlling how Ansible behaves: precedence rulesįilters let you transform JSON data into YAML data, split a URL to extract the hostname, get the SHA1 hash of a string, add or multiply integers, and much more. I just tried it running Ubuntu 11.10 (oneiric) 3.0.0-32-generic 51-Ubuntu SMP Thu Mar 21 15:51: i686 i686 i386 GNU/Linux It works fine.Virtualization and Containerization Guides.Protecting sensitive data with Ansible vault.Playbook Example: Continuous Delivery and Rolling Upgrades.Discovering variables: facts and magic variables.For instance, in the first column I want to know how many Red, Blue, Green etc coloured objects are there. What I wanted to do is to have a count of 'each' of these unique values not know how many unique values are there.
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