Implement the pulibrary.solrcloud Role

[jrgriffiniii]

Integrates the ongoing work within https://github.com/pulibrary/princeton_ansible/compare/solrrole-rebase

[jrgriffiniii]

I encountered the following error when attempting to provision using this:

ERROR! The field 'loop' is supposed to be a string type, however the incoming data structure is a <class 'ansible.parsing.yaml.objects.AnsibleSequence'>

The error appears to have been in '[...]/pulibrary/princeton_ansible/roles/pulibrary.zookeeper/tasks/install.yml': line 2, column 3, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:

---
- name: install application packages
  ^ here

As mentioned in dev-sec/ansible-collection-hardening#181 (comment), this was fixed by upgrading to Ansible release 2.5.7 using Python 2.7.15

[jrgriffiniii]

The following error was encountered:

TASK [pulibrary.zookeeper : Overwrite myid file.] *********************************************************************************************************************************************** fatal: [HOST.princeton.edu]: FAILED! => {"changed": false, "msg": "AnsibleUndefinedVariable: 'lib_solr1_ip' is undefined"}

This issue was reproduced when attempting to provision a second host.

[jrgriffiniii]

Overriding this issue produced the following error:

TASK [pulibrary.solrcloud : update host file] ***************************************************************************************************************************************************
fatal: [HOST.princeton.edu]: FAILED! => {"msg": "'dict object' has no attribute 'solr'"}

[jrgriffiniii]

Debugging for this host information did not yield an IP address:

[[ZOOKEEPER_HOST].princeton.edu] => (item=[SOLR_HOST].princeton.edu) => {
    "hostvars[item]": {
        "ansible_check_mode": false,
        "ansible_diff_mode": false,
        "ansible_facts": {},
        "ansible_forks": 5,
        "ansible_inventory_sources": [
            "[...]/pulibrary/princeton_ansible/hosts"
        ],
        "ansible_limit": "solrcloud",
        "ansible_playbook_python": "[...]/bin/python2.7",
        "ansible_run_tags": [
            "all"
        ],
        "ansible_skip_tags": [],
        "ansible_version": {
            "full": "2.5.7",
            "major": 2,
            "minor": 5,
            "revision": 7,
            "string": "2.5.7"
        },

[jrgriffiniii]

This was resolved by #314