Parse JSON logs and reshape line loki
Filter by substring, parse JSON, render only chosen fields. note: | json before line_format.
{app="api"} |= "error" | json | line_format "{{.level}} {{.msg}}"
more loki
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Per-level log rate
sum by (level) (rate({app="api"} | logfmt [5m]))
Quantile over unwrapped latency
quantile_over_time(0.99, {app="api"} | json | unwrap latency_ms [5m]) by (route)
Count matching lines over time
sum(count_over_time({namespace="prod"} |~ "timeout|deadline exceeded" [1m]))
logcli ad-hoc query
logcli query '{job="app/api"} |= "panic"' --since=1h --limit=200 --output=jsonl
Loki query_range via API
curl -sG "$LOKI_ADDR/loki/api/v1/query_range" --data-urlencode 'query=sum(rate({app="api"}[5m]))' --data-urlencode 'step=60' | jq '.data.result'