Looping through dictionary values inside Ansible playbook

Question

I have an Ansible playbook that sets up Splunk cluster, one of the commands adds a Server List of cluster members,

- name: search head init & set CAPTAIN 
  block: 
    - command: splunk init shcluster-config -auth admin:changeme \
          -mgmt_uri "https://{{ ansible_default_ipv4.address }}:8089" \
          -replication_port 8090 -conf_deploy_fetch_url https://{{ deployer_ip }}:8089 -secret {{ cluster['secret'] }}
      # set captain
    - debug: msg='setting captain'
    - command: splunk bootstrap shcluster-captain \
              -servers_list "10.185.20.156:8089, 10.185.20.160:8089, 10.185.20.161:8089" -auth admin:changeme

I have all my config vars set inside a file, and thats where Im getting them from (for example, cluster['secret']), the config.yaml varfile looks like this,

# Cluster Config
cluster:
  secret: abracadabra  # secret key
  app_name: cluster  # adds a custom Splunk App for Cluster config
  members:
    mrxsplunksh01: 10.185.20.156
    mrxsplunksh02: 10.185.20.160 
    mrxsplunksh03: 10.185.20.161

I cant figure out how to parse/loop the cluster['members'] dictionary to get the IP of each cluster member, so I dont have to do this part manually,

  - command: splunk bootstrap shcluster-captain \
                  -servers_list "10.185.20.156:8089, 10.185.20.160:8089, 10.185.20.161:8089" -auth admin:changeme

I tried with_items and with_dict and I can't get it to parse each element correctly.

techraf · Answer 1 · 2017-12-28T02:19:44.880

You don't need any loops to achieve this.

Firstly, you can get a list of dictionary values with Python values() method:
```
cluster.members.values()
```
Then you need to modify individual elements of the list like in this answer:
```
map('regex_replace', '(.*)', '\\1:8089')
```
Finally, you need to convert the list to a string, splitting the elements with ,:
```
join(', ') 
```

Combined:

- servers_list "{{ cluster.members.values() | map('regex_replace', '(.*)', '\\1:8089') | join(', ') }}" -auth admin:changeme

^{I’m answering from phone now, so I have not verified the exact outcome, or typos yet.}

^{And you should quote the whole argument to the command if it was written in one line. I’m not sure if YAML requires it with \, or if splitting this way is correct at all.}

Looping through dictionary values inside Ansible playbook

1 Answers1