# cd node_exporter-1.0.1.linux-amd64/
# mkdir key
# touch height.sh
# cat height.sh
#!/bin/bash
height=`curl -X POST \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $(cat /seal/lotus/token)" \
--data '{ "jsonrpc": "2.0", "method": "Filecoin.ChainHead", "params": [], "id": 1 }' \
'http://127.0.0.1:1234/rpc/v0' \
| jq .result.Height`
date +'%Y-%m-%d %H:%M:%S'
echo "height $height"
2020-12-25 21:41:01
height 353241
# crontab -l
* * * * * /bin/bash /root/node_exporter-1.0.1.linux-amd64/key/height.sh > /root/node_exporter-1.0.1.linux-amd64/key/key.prom
--collector.textfile.directory
vim /lib/systemd/system/node_exporter.service
# cat /lib/systemd/system/node_exporter.service
[Unit]
Description=node_exporter service
[Service]
User=root
ExecStart=/root/node_exporter-1.0.1.linux-amd64/node_exporter \
--collector.textfile.directory=/root/node_exporter-1.0.1.linux-amd64/key
TimeoutStopSec=10
Restart=on-failure
RestartSec=5
[Install]
WantedBy=multi-user.target
systemctl daemon-reload
systemctl restart node_exporter.service
- 获取到
height值
# curl http://localhost:9100/metrics | grep height
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0# HELP height Metric read from /root/node_exporter-1.0.1.linux-amd64/key/key.prom
# TYPE height untyped
height 355308
100 77348 0 77348 0 0 2288k 0 --:--:-- --:--:-- --:--:-- 2288k
参考：