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https://github.com/tailscale/tailscale.git
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88 lines
2.7 KiB
Bash
88 lines
2.7 KiB
Bash
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#!/bin/bash
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# Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file.
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#
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# This shell script demonstrates writing logs from machines
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# and then reprocessing those logs to amalgamate python tracebacks
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# into a single log entry in a new collection.
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#
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# To run this demo, first install the example applications:
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#
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# go install tailscale.com/logtail/example/...
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#
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# Then generate a LOGTAIL_API_KEY and two test collections by visiting:
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#
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# https://log.tailscale.io
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#
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# Then set the three variables below.
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trap 'rv=$?; [ "$rv" = 0 ] || echo "-- exiting with code $rv"; exit $rv' EXIT
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set -e
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LOG_TEXT='server starting
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config file loaded
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answering queries
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Traceback (most recent call last):
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File "/Users/crawshaw/junk.py", line 6, in <module>
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main()
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File "/Users/crawshaw/junk.py", line 4, in main
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raise Exception("oops")
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Exception: oops'
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die() {
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echo "$0: $*" >&2
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exit 1
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}
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msg() {
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echo "-- $*" >&2
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}
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if [ -z "$LOGTAIL_API_KEY" ]; then
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die "LOGTAIL_API_KEY is not set"
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fi
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if [ -z "$COLLECTION_IN" ]; then
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die "COLLECTION_IN is not set"
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fi
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if [ -z "$COLLECTION_OUT" ]; then
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die "COLLECTION_OUT is not set"
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fi
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# Private IDs are 32-bytes of random hex.
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# Normally you'd keep the same private IDs from one run to the next, but
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# this is just an example.
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msg "Generating keys..."
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privateid1=$(hexdump -n 32 -e '8/4 "%08X"' /dev/urandom)
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privateid2=$(hexdump -n 32 -e '8/4 "%08X"' /dev/urandom)
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privateid3=$(hexdump -n 32 -e '8/4 "%08X"' /dev/urandom)
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# Public IDs are the SHA-256 of the private ID.
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publicid1=$(echo -n $privateid1 | xxd -r -p - | shasum -a 256 | sed 's/ -//')
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publicid2=$(echo -n $privateid2 | xxd -r -p - | shasum -a 256 | sed 's/ -//')
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publicid3=$(echo -n $privateid3 | xxd -r -p - | shasum -a 256 | sed 's/ -//')
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# Write the machine logs to the input collection.
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# Notice that this doesn't require an API key.
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msg "Producing new logs..."
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echo "$LOG_TEXT" | logtail -c $COLLECTION_IN -k $privateid1 >/dev/null
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echo "$LOG_TEXT" | logtail -c $COLLECTION_IN -k $privateid2 >/dev/null
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# Adopt the logs, so they will be kept and are readable.
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msg "Adopting logs..."
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logadopt -p "$LOGTAIL_API_KEY" -c "$COLLECTION_IN" -m $publicid1
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logadopt -p "$LOGTAIL_API_KEY" -c "$COLLECTION_IN" -m $publicid2
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# Reprocess the logs, amalgamating python tracebacks.
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#
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# We'll take that reprocessed output and write it to a separate collection,
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# again via logtail.
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#
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# Time out quickly because all our "interesting" logs (generated
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# above) have already been processed.
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msg "Reprocessing logs..."
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logreprocess -t 3s -c "$COLLECTION_IN" -p "$LOGTAIL_API_KEY" 2>&1 |
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logtail -c "$COLLECTION_OUT" -k $privateid3
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