Hello Guys,
I have hit a major blocker probably because I have little knowledge on how
to use special variables like hostvars and groupvars etc while using
dynamic inventory especially with AWS.
I had a playbook for creating vpc, networking stuff, creating of various
AWS services like RDS, EC2 , ELB etc and later run various nginx,
tomcat,fail2ban etc roles to configure them. So I register some of the
variables and use set_facts on registered variables and get them later on
hostvars for example at the end of the playbook when I am adding nodes to
ELB for example. So it worked great etc.
This time around I had a constraint of having DBs, a mongo replicaset and
RDS all offline, So ansible controller was launched inside AWS. I could run
the same all-in-one playbook inside that new aws controller but I became
adept of re-usability. So I split the playbook into logical sub files and
only run the playbook that actually configures installs on nodes inside the
aws controller.
That said, since I am using ec2.py file for dynamic inventory, I would not
want to hard code anything line box private_dns_name for example so I use
tag_Name_XXX to configure boxes with Name tags but have no clue how to get
the private ips of those nodes in order to add them to the ELB.
for example:
- hosts: tag_Name_PersonalAppLiveD
tasks:
- name: get facts metadata
action: ec2_facts
register: app_facts_d
- name: setting facts for Personal AppLiveD for other playbooks component
set_fact:
app_facts_d: "{{ app_facts_d }}" ## set facts so I can have info
about it in order to use below
- hosts: localhost
connection: local
- name: Putting Personal nodes under ELB
ec2_elb:
ec2_elbs: "{{ Personal_elb['name'] }}"
region: "{{ Personal_vpc['vpc']['region'] }}"
state: present
wait: yes
wait_timeout: 400
instance_id: "{{ item }}"
with_items:
- "{{
hostvars['tag_Name_PersonalAppLiveB']['app_facts_b']['ansible_facts']['ansible_ec2_ami_id']
}}"
- "{{
hostvars['tag_Name_PersonalAppLiveC']['app_facts_c']['ansible_facts']['ansible_ec2_ami_id']
}}"
- "{{
hostvars['tag_Name_PersonalAppLiveD']['app_facts_d']['ansible_facts']['ansible_ec2_ami_id']
}}"
Full snippet is available at pastebin.com <http://pastebin.com/RE8ZKZv9>
but from this example, you would notice that I am treating tag name as host
which should not be the case (got this understanding on the IRC chat)
wanted to try use groupvars but I got stuck as I don't know how to use it
without actual inventory files.
Basically I would be grateful if someone could shed some light on how to
get facts on these hosts groups we use "tag_Name" for in the playbook so I
can access them inside the ec2_elb module.
Best Regards,
--
blog: http://www.mycodingpains.com
linkedin: http://gh.linkedin.com/pub/joseph-djomeda/14/5b6/64b
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