Issue
The Promote administrative System Overview table only shows the Leader node, or a subset of the nodes in the Promote cluster.

However, the promote.status command reports that everything is working correctly:
[promote@CST-DEMO-PRO-1 ~]$ promote.status
ID NAME MODE REPLICAS IMAGE PORTS
0bghzbfpxjla promote_registrator global 4/4 quay.io/yhat/registrator:2020.4.0
0qudq20bmce4 promote_kibana replicated 1/1 quay.io/yhat/kibana:2020.4.0 *:85->5601/tcp
20vddh5u9y5o promote_logstash global 4/4 quay.io/yhat/logstash:2020.4.0 *:5001->5000/tcp, *:5400->5400/tcp, *:9600->9600/tcp, *:5002->5002/udp
2q928z6880fa promote_portainer replicated 1/1 portainer/portainer:1.22.2 *:9000->9000/tcp
4syx12g0nxbt promote_db replicated 1/1 quay.io/yhat/promote-db:2020.4.0 *:5432->5432/tcp
bcc1qknamvji promote_elasticsearch replicated 1/1 quay.io/yhat/elasticsearch:2020.4.0 *:9200->9200/tcp, *:9300->9300/tcp
cnfidv40evbr promote_docker-events-mon global 4/4 quay.io/yhat/docker-events-mon:2020.4.0
jt3piu5y9f4l promote_consul replicated 1/1 quay.io/yhat/consul:2020.4.0 *:8500->8500/tcp
kwroflyqsjk0 promote_nginx global 4/4 quay.io/yhat/nginx-proxy:2020.4.0
l96vmcuv0spy promote_influxdb replicated 1/1 quay.io/yhat/influxdb:2020.4.0 *:8086->8086/tcp
mg2tlt75rf8y promote_logspout global 4/4 quay.io/yhat/logspout-logstash:2020.4.0
pd1c8nmskxaj promote_registry replicated 1/1 registry:2.6.2 *:5000->5000/tcp
wpkwasc0u4ov promote_app replicated 1/1 quay.io/yhat/promote-app:2020.4.0 *:3001->3001/tcp
y93r7no24zd8 promote_telegraf global 4/4 quay.io/yhat/telegraf:2020.4.0
Cause
The cause of this problem is that the time of each node in the cluster must be in sync with the Leader node. This can easily be checked with the "date" command at the Linux command prompt. Machine times can slowly diverge over time if they are not in sync with a NTP server.
Resolution
Work with your IT team to configure the NTP service to keep machines in sync with an NTP server. Example procedure below:
1. Install the NTP package:
sudo yum install ntp
2. Edit the NTP configuration file:
sudo vi /etc/ntp.conf
Add the NTP servers to the configuration file:
# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
server 0.pool.ntp.orgserver 1.pool.ntp.org
server 2.pool.ntp.org
3. Start the NTP Service:
sudo service ntpd start
4. Configure the NTP service to auto start on system boot:
sudo chkconfig ntpd on
5. Repeat steps 1-4 on all machines the Promote Cluster.
After completing the above steps, the "date" command should return consistent results on all machines, and the System Overview panel should then display all machines the Promote Cluster.
