在线安装Clock
官网：https://grafana.com/grafana/plugins/grafana-clock-panel
# grafana-cli plugins install grafana-clock-panel
# systemctl restart grafana-server离线安装Clock
自行编译
# cd /var/lib/grafana/plugins/
# git clone https://github.com/grafana/clock-panel/
# yarn
# yarn build
# systemctl restart grafana-server官方编译
参考：https://grafana.com/grafana/plugins/grafana-clock-panel/installation
已编译zip包：https://grafana.com/api/plugins/grafana-clock-panel/versions/1.0.3/download
# unzip -q grafana-clock-panel-v1.0.3-0-gbb466d0.zip
# mv grafana-clock-panel-bb466d0 grafana-clock-panel
# mv grafana-clock-panel /var/lib/grafana/plugins/
# systemctl restart grafana-server