Ungrouped : hosts : : webservers : hosts : : : dbservers : hosts : : : : Default groups Įven if you do not define any groups in your inventory file, Ansible creates two default groups: all and ungrouped. A basic INI /etc/ansible/hosts might look like this: The most common formats are INI and YAML. You can create your inventory file in one of many formats, depending on the inventory plugins you have. Inventory basics: formats, hosts, and groups Inheriting variable values: group variables for groups of groupsĬonnecting to hosts: behavioral inventory parameters Grouping groups: parent/child group relationshipsĪssigning a variable to one machine: host variablesĪssigning a variable to many machines: group variables Inventory basics: formats, hosts, and groups You can use multiple sources for inventory, including both dynamic inventory and static files. For example, you can use a dynamic inventory plugin to list resources in one or more cloud providers. These can use different formats (YAML, ini, and so on). You can create a directory with multiple inventory files. Here are three options beyond the /etc/ansible/hosts file: As your inventory expands, you may need more than a single file to organize your hosts and groups. You can specify a different inventory file at the command line using the -i option or in configuration using inventory.Īnsible Inventory plugins support a range of formats and sources to make your inventory flexible and customizable. The default location for this file is /etc/ansible/hosts. The simplest inventory is a single file with a list of hosts and groups. Once your inventory is defined, you use patterns to select the hosts or groups you want Ansible to run against. Your inventory defines the managed nodes you automate, with groups so you can run automation tasks on multiple hosts at the same time. You can pass host names at the command line, but most Ansible users create inventory files.
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