wan
f69cb99b3f
- up/down/status interface, history in /var/lib/sysmig/applied - 001 swap 2GB + swappiness=10, 002-004 trim unneeded daemons (~56MB) - google-osconfig-agent intentionally kept - all messages/comments in ASCII English (console font safety)
37 lines
1.2 KiB
Bash
37 lines
1.2 KiB
Bash
#!/usr/bin/env bash
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# 001-create-swap - Create 2GB swap + fstab entry + vm.swappiness=10
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# up: enable swap (skipped if swap already active)
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# down: disable swap and remove file/fstab/sysctl entries
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set -euo pipefail
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case "${1:-}" in
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up)
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if swapon --show --noheadings | grep -q .; then
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echo " swap already active - skipping"
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exit 0
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fi
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if [[ ! -f /swapfile ]]; then
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fallocate -l 2G /swapfile || {
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dd if=/dev/zero of=/swapfile bs=1M count=2048 status=none
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}
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chmod 600 /swapfile
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mkswap /swapfile >/dev/null
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fi
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swapon /swapfile
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grep -q '^/swapfile' /etc/fstab || echo '/swapfile none swap sw 0 0' >> /etc/fstab
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if ! grep -rqs 'vm.swappiness' /etc/sysctl.d/ /etc/sysctl.conf; then
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echo 'vm.swappiness=10' > /etc/sysctl.d/99-swap.conf
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sysctl -p /etc/sysctl.d/99-swap.conf >/dev/null
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fi
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echo " swap 2GB enabled + fstab entry + vm.swappiness=10"
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;;
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down)
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swapoff /swapfile
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rm -f /swapfile
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sed -i '\|^/swapfile|d' /etc/fstab
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grep -q '^vm.swappiness=10$' /etc/sysctl.d/99-swap.conf 2>/dev/null \
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&& rm -f /etc/sysctl.d/99-swap.conf || true
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echo " swap removed"
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;;
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esac
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