I need to configure ansible to make ssh connections to my EC2 instances
based on parameters configure in ec2 tags. I've successfully done this
using ec2.py script to build dynamic inventory. With this great
functionality, I've setup 3 tags that contains all what I need to make ssh
connections to my ec2 hosts, like this example:
- hosts: tag_v3_elasticsearch_prod_True
vars:
- ansible_ssh_private_key_file: "{{ ec2_tag_ssh_key |
default('sv3.key') }}"
- ansible_ssh_port: "{{ ec2_tag_ssh_port | default(22) }}"
- ansible_ssh_user: "{{ ec2_tag_ssh_user | default('ubuntu') }}"
tasks:
- SOME TASKS....
But, amazon has a limit of 10 tags by ec2 instances (I use many other tags
associated with my ec2 instances). So, I need to join some tags into one to
avoid pass this limit. Them, I've an idea to join those 3 ssh tags into one
using json format, like this:
ssh: {"ssh_key": "prod.key", "ssh_port": "22", "ssh_user": "ansible"}
And them, I've configured my playbook to parse this variable with from_json
filter.
---
- hosts: tag_v3_elasticsearch_prod_True
vars:
- ssh_private_key_file: "{{ ec2_tag_ssh | from_json }}"
- ssh_port: "{{ ec2_tag_ssh | from_json }}"
- ssh_user: "{{ ec2_tag_ssh | from_json }}"
tasks:
- debug: var=ssh_private_key_file
- debug: var=ssh_port
- debug: var=ssh_user
But, a warning message is displayed to me. It seems that from_json filter
isn't recognized in playbook vars section.
How can I solve my problem?
[WARNING]: non fatal error while trying to template play variables: Failed
to
template {{ ec2_tag_ssh | from_json }}: an unexpected type error occurred.
Error was expected string or buffer
PLAY [tag_v3_elasticsearch_prod_True]
*****************************************
GATHERING FACTS
***************************************************************
ok: [x.x.x.xxx]
TASK: [debug var=ssh_private_key_file]
****************************************
ok: [x.x.x.xxx] => {
"var": {
"ssh_private_key_file": {
"ssh_key": "prod.pem",
"ssh_port": "22",
"ssh_user": "ansible"
}
}
}
TASK: [debug var=ssh_port]
****************************************************
ok: [x.x.x.xxx] => {
"var": {
"ssh_port": {
"ssh_key": "prod.pem",
"ssh_port": "22",
"ssh_user": "ansible"
}
}
}
TASK: [debug var=ssh_user]
****************************************************
ok: [x.x.x.xxx] => {
"var": {
"ssh_user": {
"ssh_key": "prod.pem",
"ssh_port": "22",
"ssh_user": "ansible"
}
}
}
PLAY RECAP
********************************************************************
x.x.x.xxx : ok=4 changed=0 unreachable=0 failed=0
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