Martin, I also added you to the Jira - can you please have a look?

error from node-1 messages log:
Jul 23 05:09:14 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:14 -0400 [warn]: detached forwarding server 'lago-basic-suite-master-engine' host="lago-basic-suite-master-engine" port=24224 phi=16.275347714068506
Jul 23 05:09:14 lago-basic-suite-master-host-1 fluentd: ["lago-basic-suite-master-engine", "lago-basic-suite-master-engine", "lago-basic-suite-master-engine", "lago-basic-suite-master-engine", "lago-basic-suite-master-engine", "lago-basic-suite-master-engine"]
Jul 23 05:09:14 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:14 -0400 fluent.warn: {"host":"lago-basic-suite-master-engine","port":24224,"phi":16.275347714068506,"message":"detached forwarding server 'lago-basic-suite-master-engine' host=\"lago-basic-suite-master-engine\" port=24224 phi=16.275347714068506"}
Jul 23 05:09:15 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:15 -0400 [warn]: detached forwarding server 'lago-basic-suite-master-engine' host="lago-basic-suite-master-engine" port=24224 phi=16.70444149784817
Jul 23 05:09:15 lago-basic-suite-master-host-1 fluentd: ["lago-basic-suite-master-engine", "lago-basic-suite-master-engine", "lago-basic-suite-master-engine", "lago-basic-suite-master-engine", "lago-basic-suite-master-engine", "lago-basic-suite-master-engine"]
Jul 23 05:09:15 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:15 -0400 fluent.warn: {"host":"lago-basic-suite-master-engine","port":24224,"phi":16.70444149784817,"message":"detached forwarding server 'lago-basic-suite-master-engine' host=\"lago-basic-suite-master-engine\" port=24224 phi=16.70444149784817"}
Jul 23 05:09:23 lago-basic-suite-master-host-1 python: ansible-command Invoked with warn=False executable=None _uses_shell=False _raw_params=systemctl is-active 'collectd' removes=None argv=None creates=None chdir=None stdin=None
Jul 23 05:09:25 lago-basic-suite-master-host-1 systemd-logind: New session 29 of user root.
Jul 23 05:09:25 lago-basic-suite-master-host-1 systemd: Started Session 29 of user root.
Jul 23 05:09:25 lago-basic-suite-master-host-1 systemd: Starting Session 29 of user root.
Jul 23 05:09:25 lago-basic-suite-master-host-1 systemd-logind: Removed session 29.
Jul 23 05:09:27 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:27 -0400 [warn]: failed to flush the buffer. error_class="RuntimeError" error="no nodes are available" plugin_id="object:151a620"
Jul 23 05:09:27 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:27 -0400 [warn]: retry count exceededs limit.
Jul 23 05:09:27 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:27 -0400 [warn]: /usr/share/gems/gems/fluentd-0.12.42/lib/fluent/plugin/out_forward.rb:222:in `write_objects'
Jul 23 05:09:27 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:27 -0400 [warn]: /usr/share/gems/gems/fluentd-0.12.42/lib/fluent/output.rb:490:in `write'
Jul 23 05:09:27 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:27 -0400 [warn]: /usr/share/gems/gems/fluentd-0.12.42/lib/fluent/buffer.rb:354:in `write_chunk'
Jul 23 05:09:27 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:27 -0400 [warn]: /usr/share/gems/gems/fluentd-0.12.42/lib/fluent/buffer.rb:333:in `pop'
Jul 23 05:09:27 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:27 -0400 [warn]: /usr/share/gems/gems/fluentd-0.12.42/lib/fluent/output.rb:342:in `try_flush'
Jul 23 05:09:27 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:27 -0400 [warn]: /usr/share/gems/gems/fluentd-0.12.42/lib/fluent/output.rb:149:in `run'
Jul 23 05:09:27 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:27 -0400 [error]: throwing away old logs.
Jul 23 05:09:27 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:27 -0400 fluent.warn: {"error_class":"RuntimeError","error":"no nodes are available","plugin_id":"object:151a620","message":"failed to flush the buffer. error_class=\"RuntimeError\" error=\"no nodes are available\" plugin_id=\"object:151a620\""}
Jul 23 05:09:27 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:27 -0400 fluent.warn: {"message":"retry count exceededs limit."}
Jul 23 05:09:27 lago-basic-suite-master-host-1 fluentd: 2018-07-23 05:09:27 -0400 fluent.error: {"message":"throwing away old logs."}