# Ansible loop variable **URL:** \ **Category:** Ansible Project\ **Created:** [April 25, 2017, 11:19pm UTC](https://forum.ansible.com/t/ansible-loop-variable/24317 "2017-04-25T23:19:44Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Kiran\_Kumar1](https://avatars.discourse-cdn.com/v4/letter/k/ac8455/32.png) [@Kiran\_Kumar1](https://forum.ansible.com/u/Kiran_Kumar1)\ **Post date:** [April 25, 2017, 11:19pm UTC](https://forum.ansible.com/t/ansible-loop-variable/24317/1 "2017-04-25T23:19:44Z")
Hello friends, Am having a challenge finding a solution to below issue. I need to generate multiple network files based on single template and the value of template should change based on the item like IP/NM/GW . Example ```auto vars: docker1ip: 1.2.3.4 docker1nm: 255.255.255.1 docker1gw: 1.2.3.1 docker2ip: 1.2.3.5 docker2nm: 255.255.255.2 docker2gw: 1.2.3.1 ``` ```auto ``` - name: Generating docker network Files template: src=templates/docker\_interface dest=/etc/sysconfig/network-scripts/ifcfg-docker{{ item }} vars: ipaddress: {{ docker{{ item }}ip }} netmask: {{ docker{{ item }}nm }} gateway: {{ docker{{ item }}gw }} with\_sequence: start=1 end=2 stride=1 template DEVICE=docker{{ item }} BONDING\_OPTS=“miimon=100 mode=1” ONPARENT=yes BOOTPROTO=static IPADDR={{ ipaddress }} NETMASK={{ netmask }} GATEWAY={{ gateway }} Above task doesnt work but I need a solution it may be a different approach too. ---
**Author:** ![Kai\_Stian\_Olstad](https://avatars.discourse-cdn.com/v4/letter/k/e19adc/32.png) [@Kai\_Stian\_Olstad](https://forum.ansible.com/u/Kai_Stian_Olstad)\ **Post date:** [April 26, 2017, 7:14am UTC](https://forum.ansible.com/t/ansible-loop-variable/24317/2 "2017-04-26T07:14:57Z")
> Am having a challenge finding a solution to below issue. > I need to generate multiple network files based on single template and the > value of template should change based on the item like IP/NM/GW . > > Example > > vars: >   docker1ip: 1.2.3.4 >   docker1nm: 255.255.255.1 >   docker1gw: 1.2.3.1 >   docker2ip: 1.2.3.5 >   docker2nm: 255.255.255.2 >   docker2gw: 1.2.3.1 > >   - name: Generating docker network Files >     template: src=templates/docker\_interface > dest=/etc/sysconfig/network-scripts/ifcfg-docker{{ item }} >     vars: >       ipaddress: {{ docker{{ item }}ip }} >       netmask: {{ docker{{ item }}nm }} >       gateway: {{ docker{{ item }}gw }} >     with\_sequence: start=1 end=2 stride=1 Variables in variables is not possible like this, you need to do it like this [https://docs.ansible.com/ansible/faq.html#when-should-i-use-also-how-to-interpolate-variables-or-dynamic-variable-names](https://docs.ansible.com/ansible/faq.html#when-should-i-use-also-how-to-interpolate-variables-or-dynamic-variable-names) > template > > DEVICE=docker{{ item }} > BONDING\_OPTS="miimon=100 mode=1" > ONPARENT=yes > BOOTPROTO=static > IPADDR={{ ipaddress }} > NETMASK={{ netmask }} > GATEWAY={{ gateway }} > > Above task doesnt work but I need a solution it may be a different approach > too. Since you are specifying everything why not restructure the variable, one example on how to do it: vars:    docker\_inv:      - host: docker1        ip: 1.2.3.4        nm: 255.255.255.1        gw: 1.2.3.1      - host: docker2        ip: 1.2.3.5        nm: 255.255.255.2        gw: 1.2.3.1    - name: Generating docker network Files      template: src=templates/docker\_interface dest=/etc/sysconfig/network-scripts/ifcfg-{{ item.host }}      with\_items: '{{ docker\_inv }}' template ---
**Author:** ![Kiran\_Kumar1](https://avatars.discourse-cdn.com/v4/letter/k/ac8455/32.png) [@Kiran\_Kumar1](https://forum.ansible.com/u/Kiran_Kumar1)\ **Post date:** [April 26, 2017, 8:50pm UTC](https://forum.ansible.com/t/ansible-loop-variable/24317/3 "2017-04-26T20:50:07Z")
HI Kai Stian Olstad , That helped me and thanks a ton but that scenario works better if we know the number of docker networks. Here is the exact use case where I need to generate multiple docker network files based on the number of container count and push a single template multiple times to match the container count updating the correct network details. I would get docker1ip/nm/gw docker2ip/nm/gw dockernip/nm/gw from external source and just for testing i mentioned them as vars in this playbook.