Hi 👋 It’s the VLAN ID for the sub-interface which ansible_facts is showing for eth0_1
You must use the iproute 2 package with ip addr not net-tools If you want to modify this then you will need set_facts magic; To access variables of other hosts, you should enable fact caching <http://docs.ansible.com/ansible/playbooks_variables.html#fact-caching>. In playbook files, you should adding gather_facts: True to update facts. The ansible_interfaces fact lists all of the existing network interfaces. Some hints to get an interface when you know more information: var: allNetworkInterfaces: "{{ ansible_facts | dict2items | selectattr('value.ipv4', 'defined') | map(attribute='value') | list }}" allNetworkInterfaces_variant2: "{{ ansible_facts.interfaces | map('extract', ansible_facts ) | list }}" interfaceWithKnownIp: "{{ ansible_facts | dict2items | selectattr('value.ipv4', 'defined') | selectattr('value.ipv4.address', 'equalto', myKnowIpV4) | first }}" interfaceWithKnownIp_fromVar: "{{ allNetworkInterfaces | selectattr('ipv4.address', 'equalto', myKnowIpV4) | first }}" interfacesWithPartialKnowMac: "{{ allNetworkInterfaces | selectattr('macaddress', 'match', knownMacPrefix~'.*') | list }}" interfacesWitKnowType: "{{ allNetworkInterfaces | selectattr('type', 'equalto', knownType) | sort(attribute='device') | list }}" # extended on 2020-10-28 queryForKnownIpv6: "[*].{device: device, ipv4: ipv4, ipv6: ipv6[? address == 'fe80::a00:27ff:fe38:ad36']}[?ipv6])" # string must be in ' # sorry, only partial interface info, did not find out how to return all info directly interfacesWithKnownIpv6: '{{ allNetworkInterfaces | json_query(queryForKnownIpv6) | first }}' queryForKnownIpv4_linux: "[?ipv4.address == '{{ myKnownIpV4 }}']}[?ipv4])" # string must be in ' interfacesWithKnownIp_variantJsonQuery: '{{ allNetworkInterfaces | json_query(queryForKnownIpv4_linux) | first }}' some short explications: - dict2item <https://docs.ansible.com/ansible/latest/user_guide/playbooks_filters.html#dict-filter> because selectattr <http://jinja.pocoo.org/docs/dev/templates/#selectattr>expects an array - map(attribute='...') <http://jinja.pocoo.org/docs/dev/templates/#map> to unpack this array - map('extract', ...) <https://docs.ansible.com/ansible/latest/user_guide/playbooks_filters.html#extracting-values-from-containers> to extract interfaces from ansible_facts - ansible_facts.interfaces is the same as ansible_interfaces - json_query() <https://docs.ansible.com/ansible/latest/user_guide/playbooks_filters.html#selecting-json-data-json-queries> for flexible selecting and unpacking, an alternative variant with `map()? is welcome the ansible_interfaces fact contains a list of all the network interfaces and they appear to be in order (i.e., the first ethernet interface would have been called eth0, the second eth1, etc). With a little set_fact magic: - name: define traditional ethernet facts set_fact: ansible_eth: "{% set ansible_eth = ansible_eth|default([]) + [hostvars[inventory_hostname]['ansible_' + item]] %}{{ ansible_eth|list }}" when: hostvars[inventory_hostname]['ansible_' + item]['type'] == 'ether' with_items: - "{{ hostvars[inventory_hostname]['ansible_interfaces'] }}" This loops over all of the ansible_interfaces entries for the current machine and builds a list of the hostvars[inventory_hostname]['ansible_' + item] entries that have a type equal to "ether". Thus now ansible_eth.0 and ansible_eth.1 should be roughly equivalent to the old ansible_eth0 and ansible_eth1 respectively. Best, S.W On Thu, 12 Jan 2023 at 11:24, Kathy L <[email protected]> wrote: > I'm using ansible-core 1.18. When I gather facts on a device, it shows > the interfaces of eth0, eth0_1, eth1 and lo. The results of "ip a" show > only eth0, eth1 and lo interfaces . When I try to start arpwatch for each > interface (other than lo), it fails on eth0_1, which makes sense to me. > Why does ansible_facts interfaces show eth0_1? > > -- > You received this message because you are subscribed to the Google Groups > "Ansible Project" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/ansible-project/61377336-30f3-4b80-b783-82ff963de609n%40googlegroups.com > <https://groups.google.com/d/msgid/ansible-project/61377336-30f3-4b80-b783-82ff963de609n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Ansible Project" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/CAACV%3DNnLokLpgt0d8pg%3DQhPiCHFM3pX4kk4YTLuCt29Q5akofA%40mail.gmail.com.
