added ssh_dump_logs.sh
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#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2024-08-26 14:38:31 +0200 (Mon, 26 Aug 2024)
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#
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# https///github.com/HariSekhon/DevOps-Bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/HariSekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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# shellcheck disable=SC1090,SC1091
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. "$srcdir/lib/utils.sh"
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# shellcheck disable=SC1090,SC1091
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. "$srcdir/lib/kubernetes.sh"
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# shellcheck disable=SC2034,SC2154
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usage_description="
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Uses SSH to dump logs to local text files for servers given as arguments for uploading to vendor support cases
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Collects:
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/var/log/messages
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/var/log/dmesg
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Dumps logs to files of this name format:
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log.YYYY-MM-DD-HHSS.<server>.<log>.txt
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For each server that is not prefixed by root@, uses sudo in ssh to copy the log file to the user's home directory first
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to work around root file permissions issues and chown it to the login user
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Requires SSH client to be installed and configured to preferably passwordless ssh key access
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"
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# used by usage() in lib/utils.sh
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# shellcheck disable=SC2034
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usage_args="<server1> [<server2> <server3>]"
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help_usage "$@"
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min_args 1 "$@"
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for server in "$@"; do
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echo
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tstamp="$(date '+%F_%H%M')"
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#for log in messages secure dmesg; do
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for log in messages dmesg; do
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log_file="log.$tstamp.$server.$log.txt"
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# ignore && && || it works
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# shellcheck disable=SC2015
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timestamp "Dumping server $log log: $server" &&
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if ! [[ "$server" =~ ^root@ ]]; then
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# want client side expansion
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# shellcheck disable=SC2029
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ssh "$server" "sudo cp -v /var/log/$log ~/$log_file && sudo chown -v \$USER ~/$log_file" &&
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scp "$server":"./$log_file" .
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else
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scp "$server":"/var/log/$log" "$log_file"
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fi &&
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timestamp "Dumped server $log log to file: $log_file" ||
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warn "Failed to get $log log for server '$server'"
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# XXX: because race condition - spot instances can go away during execution
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# and we still want to collect the rest of the servers
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done
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done
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echo
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timestamp "Log dumps completed"
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