Met

Met is a small CLI tool that will periodically scrape a metrics compatible endpoint and return the values interactively via Bubbletea

Simply point it at an endpoint, and you'll get a nice periodically refreshed output.

Counter metrics will accumulate over time, whereas Gauge metrics will show the last returned value.

Including and Excluding Metrics

met has flags for controlling the metrics you'd like to display.

--include does a substring match on metric names and includes them. --exclude does a substring match on metric names and excludes them. --labels will examine metric labels and only show the ones with a string match.

Examples

Given the following metrics

# TYPE tailscaled_advertised_routes gauge
# HELP tailscaled_advertised_routes Number of advertised network routes (e.g. by a subnet router)
tailscaled_advertised_routes 0
# TYPE tailscaled_approved_routes gauge
# HELP tailscaled_approved_routes Number of approved network routes (e.g. by a subnet router)
tailscaled_approved_routes 0
# TYPE tailscaled_inbound_bytes_total counter
# HELP tailscaled_inbound_bytes_total Counts the number of bytes received from other peers
tailscaled_inbound_bytes_total{path="derp"} 13972
tailscaled_inbound_bytes_total{path="direct_ipv4"} 13997076
tailscaled_inbound_bytes_total{path="direct_ipv6"} 74484000
# TYPE tailscaled_inbound_dropped_packets_total counter
# HELP tailscaled_inbound_dropped_packets_total Counts the number of dropped packets received by the node from other peers
# TYPE tailscaled_inbound_packets_total counter
# HELP tailscaled_inbound_packets_total Counts the number of packets received from other peers
tailscaled_inbound_packets_total{path="derp"} 101
tailscaled_inbound_packets_total{path="direct_ipv4"} 72229
tailscaled_inbound_packets_total{path="direct_ipv6"} 64962
# TYPE tailscaled_outbound_bytes_total counter
# HELP tailscaled_outbound_bytes_total Counts the number of bytes sent to other peers
tailscaled_outbound_bytes_total{path="derp"} 34988
tailscaled_outbound_bytes_total{path="direct_ipv4"} 9677128
tailscaled_outbound_bytes_total{path="direct_ipv6"} 10987440
# TYPE tailscaled_outbound_dropped_packets_total counter
# HELP tailscaled_outbound_dropped_packets_total Counts the number of packets dropped while being sent to other peers
tailscaled_outbound_dropped_packets_total{reason="error"} 0
# TYPE tailscaled_outbound_packets_total counter
# HELP tailscaled_outbound_packets_total Counts the number of packets sent to other peers
tailscaled_outbound_packets_total{path="derp"} 204
tailscaled_outbound_packets_total{path="direct_ipv4"} 69930
tailscaled_outbound_packets_total{path="direct_ipv6"} 22211

Include only specific metrics

met --endpoint http://100.100.100.100/metrics --include advertised
Prometheus metrics from http://100.100.100.100/metrics (every 2s)

+----------------------------------+-------+----------+------------+
| KEY                              | VALUE | INC DIFF | TOTAL DIFF |
+----------------------------------+-------+----------+------------+
| > tailscaled_advertised_routes{} | 0.00  | --       | --         |
+----------------------------------+-------+----------+------------+

Page 1-1 of 1 total metrics


Use ↑/↓ to move selection, PgUp/PgDn to scroll.
Press q or Ctrl+C to quit.

Exclude metrics

met --endpoint http://100.100.100.100/metrics --exclude inbound,outbound
Prometheus metrics from http://100.100.100.100/metrics (every 2s)

+----------------------------------+-------+----------+------------+
| KEY                              | VALUE | INC DIFF | TOTAL DIFF |
+----------------------------------+-------+----------+------------+
| > tailscaled_advertised_routes{} | 0.00  | --       | --         |
|   tailscaled_approved_routes{}   | 0.00  | --       | --         |
+----------------------------------+-------+----------+------------+

Page 1-2 of 2 total metrics


Use ↑/↓ to move selection, PgUp/PgDn to scroll.
Press q or Ctrl+C to quit.

Labels

met --endpoint http://100.100.100.100/metrics --labels path=derp
Prometheus metrics from http://100.100.100.100/metrics (every 2s)

+--------------------------------------------------+----------+-----------+------------+
| KEY                                              | VALUE    | INC DIFF  | TOTAL DIFF |
+--------------------------------------------------+----------+-----------+------------+
| > tailscaled_inbound_bytes_total{path="derp"}    | 13972.00 | +13972.00 | 34988.00   |
|   tailscaled_inbound_packets_total{path="derp"}  | 101.00   | +101.00   | 204.00     |
|   tailscaled_outbound_bytes_total{path="derp"}   | 34988.00 | +21016.00 | 34988.00   |
|   tailscaled_outbound_packets_total{path="derp"} | 204.00   | +103.00   | 204.00     |
+--------------------------------------------------+----------+-----------+------------+