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46 lines
1.3 KiB
Bash
46 lines
1.3 KiB
Bash
#!/bin/bash
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set -eu
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USAGE="USAGE: $0 PROM_URL SERVICE DURATION [TIME [LABELS]] > flamegraph.svg
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Generate a flamegraph for the given service using data from the given prometheus server.
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Uses DURATION amount of data (in prometheus timespec format, eg '15m'), ending at TIME,
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which may be unix time or RFC3339, defaults to now.
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Labels is optional extra prometheus labels to match on, in promql format,
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eg. 'foo=\"bar\",baz=\"123\"'
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Note that in the resulting flamegraph, the 'samples' value is actually showing milliseconds
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of cpu time over the given duration."
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if [ "$#" -lt 3 ]; then
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echo "$USAGE" >&2
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exit 1
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fi
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PROM=$1
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SERVICE=$2
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DURATION=$3
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TIME=${4:-now}
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LABELS=${5:-}
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if [ "$TIME" == "now" ]; then
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TIME=$(date +%s)
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fi
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if [ -n "$LABELS" ]; then
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LABELS="job=\"$SERVICE\""
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else
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LABELS="job=\"$SERVICE\",$LABELS"
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fi
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docker build -t wubloader-flamegraph:latest . -f - 1>&2 <<EOF
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FROM alpine:3.7
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RUN apk --update add curl jq perl
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RUN curl https://raw.githubusercontent.com/brendangregg/FlameGraph/master/flamegraph.pl -o /flamegraph.pl
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EOF
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docker run -i --rm -e PROM= wubloader-flamegraph:latest /bin/sh -c "
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curl -G '$PROM/api/v1/query' --data-urlencode 'time=$TIME' --data-urlencode 'query=sum(increase(flamegraph_total{$LABELS}[$DURATION])) by (stack) * 1000 > 0' |
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jq -r '.data.result[]|\"\\(.metric.stack) \\(.value[1])\"' |
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perl /flamegraph.pl
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"
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