Dynamic Inventory

[Govindaraj Venkatesan]

Hi,

Is there any script that we can use to construct dynamic inventory file for Openstack?

I downloaded the script but it gives a JSON output. Does anyone have a script to convert JSON to update a inventory file with list of IP address?

You can download the latest version of the OpenStack inventory script at: https://raw.githubusercontent.com/ansible/ansible/devel/contrib/inventory/openstack.py

Thanks,

Govind

[Matt Martz]

The dynamic inventory scripts are supposed to be used in place of a ini formatted inventory.

Instead of using `-i /path/to/ini/inventory`  you would use `-i /path/to/openstack.py`

To make that possible, the `openstack.py` file needs to be marked as executable.

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Matt Martz
@sivel
sivel.net

[govindaraj]

Thanks Matt.

How do i execute this dynamic inventory against my playbook? When i tried the below it says no hosts matches. 

#ansible-playbook jenkins_mesos_slave.yml -i openstack.py --limit jmesosslv-cmce-02p.sys.comcast.net

Here is my playbook. How can i ensure my playbook can run against this dynamic inventory file?

 #vi jenkins_mesos_slave.yml

- hosts: jenkins_mesos_slave_prod

  become: yes

  become_method: sudo

  roles:

    - vmsetup

    - mesos_slave

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Thanks & Regards
Govindaraj Venkatesan

[Matt Martz]

Effectively ansible is calling that inventory like `./openstack.py --list`

You would need to inspect the output to see what is available.

You are specifying a hosts entry of `jenkins_mesos_slave_prod`, so the dynamic inventory would need to return that group for it to be used.

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[govindaraj]

Hi Matt,

Here is the output from running openstack.py --list. Took a snippet of it.

          "interface_ip": "96.119.246.10", 

          "key_name": "ssd-xplat", 

          "metadata": {

            "cluster_name": "jenkins_mesos_master", 

            "group": "mesos_masters", 

            "master_count": "3", 

            "myid": "3"

          }, 

$ ansible-playbook jenkins_mesos_master.yml -i openstack.py --limit 96.119.246.10 --check

ERROR! Specified --limit does not match any hosts

Here is my jenkins_mesos_master.yml playbook

- hosts: mesos_masters   (should this be the group name that i need to use? )

  serial: "50%"

  become: yes

  become_method: sudo

  roles:

    - vmsetup

    - mesos_master

To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/CAD8N0v-tJVDC7Ee3noHBg%3DqDr_98b20V26FMyauUNrcbo9hX1w%40mail.gmail.com.

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[govindaraj]

Hi Matt,

How can i force openstack.py script to write IPv4 address? For some reason the JSON file has IPv6 address.

  "mesos_masters": [

    "b9d2e61e-0653-4a1f-a472-c5f15a017eae", 

    "ca8c9fc7-337f-4f92-baac-7fe41f6475ce", 

    "a904e509-b4b1-479e-8137-17bb30b400c9"

  ], 

I tried the below and it worked

ansible-playbook jenkins_mesos_master.yml -i openstack.py --limit a904e509-b4b1-479e-8137-17bb30b400c9 --check

PLAY ***************************************************************************

TASK [setup] *******************************************************************

ok: [a904e509-b4b1-479e-8137-17bb30b400c9]

Thanks,

Govind

[govindaraj]

Sorry, it's the UUID of the machine. Any way we can have it to write IP address?

 "mesos_masters": [

    "b9d2e61e-0653-4a1f-a472-c5f15a017eae", 

    "ca8c9fc7-337f-4f92-baac-7fe41f6475ce", 

    "a904e509-b4b1-479e-8137-17bb30b400c9"

  ],