Ansible selectattr Filter: Filter Lists by Attributes (Guide) — Video Tutorial

How to Filter A List By Its Attributes in an Ansible Playbook? I'm going to show you a live Playbook with some simple Ansible code. I'm Luca Berton and welcome to today's episode of Ansible Pilot. selectattr filter in Ansible Playbook? - `{{ users|selectattr("is_active") }}` - `{{ users|selectattr("email", "none") }}` Today we're talking about Ansible `selectattr` Jinja filter. Filters a sequence of objects by applying a test to the specified attribute of each object, and only selecting the objects with the test succeeding. If no test is specified, the attribute's value will be evaluated as a boolean. The two examples explain how-to for a specific attribute or value using a `users` list example. Links - [Data manipulation](https://docs.ansible.com/ansible/latest/user_guide/complex_data_manipulation.html) - [Jinja selectattr](https://jinja.palletsprojects.com/en/latest/templates/#jinja-filters.selectattr) ## Playbook How to filter a list by its attributes in an Ansible Playbook. I'm going to use the `selectattr` filter to select only one information from Ansible System Information (Facts). Specifically, I'm going to filter only for enabled features in a network interface (`eth1`). code ```yaml --- - name: selectattr Playbook hosts: all gather_facts: true tasks: - name: all features ansible.builtin.debug: var: 'ansible_facts.eth1.features' - name: filter enabled ansible.builtin.debug: msg: "{{ (ansible_facts.eth1.features | dict2items | selectattr('value', 'match', 'on') ) }}" ``` execution ```bash ansible-pilot $ ansible-playbook -i virtualmachines/demo/inventory variables/selectattr.yml PLAY [selectattr Playbook] **************************************************************************** TASK [Gathering Facts] **************************************************************************** ok: [demo.example.com] TASK [all features] ******************************************************************************* ok: [demo.example.com] => { "ansible_facts.eth1.features": { "esp_hw_offload": "off [fixed]", "esp_tx_csum_hw_offload": "off [fixed]", "fcoe_mtu": "off [fixed]", "generic_receive_offload": "on", "generic_segmentation_offload": "on", "highdma": "off [fixed]", "hw_tc_offload": "off [fixed]", "l2_fwd_offload": "off [fixed]", "large_receive_offload": "off [fixed]", "loopback": "off [fixed]", "netns_local": "off [fixed]", "ntuple_filters": "off [fixed]", "receive_hashing": "off [fixed]", "rx_all": "off", "rx_checksumming": "off", "rx_fcs": "off", "rx_gro_hw": "off [fixed]", "rx_gro_list": "off", "rx_udp_gro_forwarding": "off", "rx_udp_tunnel_port_offload": "off [fixed]", "rx_vlan_filter": "on [fixed]", "rx_vlan_offload": "on", "rx_vlan_stag_filter": "off [fixed]", "rx_vlan_stag_hw_parse": "off [fixe