added gce_ssh_keyscan.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: 2024-02-28 12:40:41 +0000 (Wed, 28 Feb 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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. "$srcdir/lib/utils.sh"
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# shellcheck disable=SC2034,SC2154
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usage_description="
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SSH keyscans all the GCE VM hosts that match the given regex filter to add them to SSH known_hosts
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Useful to doing direct SSH to hosts and especially for Ansible to speed up not going through IAP which is slow
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and not having them prompt to accept the SSH keys
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"
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# used by usage() in lib/utils.sh
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# shellcheck disable=SC2034
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usage_args="[<regex_filter> <gcloud_cli_options>]"
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help_usage "$@"
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#max_args 1 "$@"
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ssh_known_hosts_file=~/.ssh/known_hosts
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"$srcdir/gce_host_ips.sh" "$@" |
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while read -r ip hostname; do
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ssh-keyscan "$ip" >> "$ssh_known_hosts_file"
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ssh-keyscan "$hostname" >> "$ssh_known_hosts_file"
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done
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