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32 lines
1.2 KiB
Bash
Executable File
32 lines
1.2 KiB
Bash
Executable File
#!/bin/sh
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# 37-host-optimization.sh: Detect ARP flux sysctl configuration.
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#
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# This script does not change host/kernel settings.
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YELLOW=$(printf '\033[1;33m')
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RESET=$(printf '\033[0m')
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failed=0
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[ "$(sysctl -n net.ipv4.conf.all.arp_ignore 2>/dev/null || echo unknown)" = "1" ] || failed=1
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[ "$(sysctl -n net.ipv4.conf.all.arp_announce 2>/dev/null || echo unknown)" = "2" ] || failed=1
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if [ "$failed" -eq 1 ]; then
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>&2 printf "%s" "${YELLOW}"
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>&2 cat <<'EOF'
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══════════════════════════════════════════════════════════════════════════════
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⚠️ WARNING: ARP flux sysctls are not set.
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Expected values:
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net.ipv4.conf.all.arp_ignore=1
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net.ipv4.conf.all.arp_announce=2
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Detection accuracy may be reduced until configured.
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See: https://docs.netalertx.com/docker-troubleshooting/arp-flux-sysctls/
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══════════════════════════════════════════════════════════════════════════════
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EOF
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>&2 printf "%s" "${RESET}"
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fi
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