I am configuring a mongodb cluster on ec2. After first creating instances I create and attach an EBS volume to the instance. But I also want to be able to reattach the EBS volume to a replacement instance when needed.
desired:
`
-
name: Create mongod instance
ec2:
image: “{{ubuntu_image.ami}}”
region: “{{ec2_region}}”
vpc_subnet_id: “{{vpc_subnets.private|for_count(item)}}”
instance_type: “{{mongod_rs_intance_type}}”
assign_public_ip: false
group: “{{security_groups}}”
ebs_optimized: “{{mongod_rs_ebs_optimized}}”
instance_tags:
Name: “{{env_prefix}}mongod-{{item}}”
mongod_rs_member: group
env: “{{env}}”
managed_by: ansible
exact_count: 1
count_tag:
Name: “{{env_prefix}}mongod-{{item}}”
key_name: “{{aws_key_name}}”
wait: yes
register: ec2_mongods
with_sequence: count={{mongod_rs_instance_count}} -
name: Attach EBS volume to mongod instance
ec2_vol:
instance: “{{item.1.id}}”
name: “{{env_prefix}}mongod-{{item[0].item}}”
volume_size: “{{mongod_rs_ebs_volume_size}}”
volume_type: “{{mongod_rs_ebs_volume_type}}”
device_name: “{{mongod_rs_ebs_device_name}}”
register: ec2_vol
with_subelements: -
ec2_mongods.results
-
tagged_instances
`
But the ebs_vol module will error because it does not allow setting both the volume_size and name or id parameters. Looking at the code I cannot see why this need be so. There is no conflict in specifying both.
If the volume does not exist it will be created by create_volume. In that case create_volume only uses the id parameter for logging. If the volume does exist (and is not already mounted) is attached with attach_volume, which does not use the volume.
So I copied the module and commented out the offending parameter checks.
`