21.12.2021 · Ansible works against multiple managed nodes or “hosts” in your infrastructure at the same time, using a list or group of lists known as inventory. Once your inventory is defined, you use patterns to select the hosts or groups you want Ansible to run against. The default location for inventory is a file called /etc/ansible/hosts.
Filtering Hosts. The OCI inventory plugin comes with various filtering options to filter the hosts returned by the plugin. Exclude Hosts from Inventory.
21.12.2021 · guest.guestId is used by ansible_host internally by the inventory plugin. Using regular expression in filters Let us assume you want filter VMs with specific IP range. You can use regular expression in filters in your inventory file. For example, if we want all RHEL7 and Ubuntu VMs that are poweredOn, you can use inventory file:
An Ansible pattern can refer to a single host, an IP address, an inventory group, a set of groups, or all hosts in your inventory. Patterns are highly flexible ...
Ansible has a rich set of filters backed by jinja2 templating. We input some data into these templates and the jinja2 template engine process that data and provide the output accordingly. Filters mostly used for formatting or transforming the data. Then based on the output any other tasks are performed. Also, filtering is very useful in debugging.
You can create custom Ansible filters as plugins, though we generally welcome new filters into the ansible-core repo so everyone can use them. Because templating happens on the Ansible controller, not on the target host, filters execute on the controller and transform data locally. Handling undefined variables Providing default values
25.11.2018 · The inventory file is used to list all of the hosts that you would apply your playbooks to, it's your master list of all the hosts that you want to work on. If you use wildcards in there, where would Ansible get the actual list of hosts from? From DNS? That might have severe results, e.g. if you try to apply this to all hosts found in DNS...
15.02.2018 · Query filter and smart inventory; host membership of indirect group Feb 22 ... Member chrismeyersfsu commented May 26, 2020. Postgres LTREE column type could be leveraged to represent the Ansible inventory group structure. With this, I think we could provide the kinds of queries that we want here like "is HostA a member of group ...
In Ansible and Ansible Tower, as you know, everything starts with an inventory. There are a several methods how inventories can be created, starting from simple static definitions over importing inventory files to dynamic and smart inventories. In real life it’s very common to deal with external dynamic inventory sources (think cloud…).
21.11.2021 · Updated on: November 21, 2021 Sarav AK Ansible selectattr filter is to select matching objects from the dictionary by applying a test across all the objects in a dictionary/sequence. Ansible selectattr filter is basically an inherited version of Jinja selectattr filter.