Borked Upgrade from 0.71.1 to 1.0.3 w/ Functioning ReplicaSet

Description

Attempted upgrade of existing/functioning installation of RocketChat 0.71.1 with remote 3-node Mongo replicaSet by following guides located at:
Manaul Upgrade: https://rocket.chat/docs/installation/updating/
oplog Required: https://rocket.chat/docs/installation/updating/to-1-0/

Server Setup Information

  • Version of Rocket.Chat Server: 1.0.3
  • Operating System(s):
  • Primary Rocket-Chat = CentOS 7.5
  • Mongo DB PRIMARY = CentOS 7.5
  • Mongo DB SECONDARY 01 = CentOS 7.5
  • Mongo DB SECONDARY 02 = CentOS 7.5
  • Deployment Method: tar
  • Number of Running Instances: 1
  • DB Replicaset Oplog: yes
  • NodeJS Version: 8.11.4
  • MongoDB Version: 4.0.4
  • Proxy: apache
  • Firewalls involved:

Any additional Information

Contents of rocketchat.service
[Unit]
Description=The Rocket.Chat server
After=network.target remote-fs.target nss-lookup.target nginx.target mongod.target
[Service]
ExecStart=/usr/local/bin/node /opt/Rocket.Chat/main.js
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=rocketchat
User=
Environment=MONGO_URL=mongodb://:@:27017/rocketchat?authSource=admin&replicaSet= MONGO_OPLOG_URL=mongodb://:@:27017/local?authSource=admin&replicaSet= ROOT_URL=http://myChatServer.com:3000/ PORT=3000
[Install]
WantedBy=multi-user.target