mirror of
https://github.com/jokob-sk/NetAlertX.git
synced 2026-03-30 23:03:03 -07:00
37 lines
1.5 KiB
Bash
Executable File
37 lines
1.5 KiB
Bash
Executable File
#!/bin/sh
|
|
|
|
# 37-host-optimization.sh: Detect ARP flux sysctl configuration.
|
|
#
|
|
# This script does not change host/kernel settings.
|
|
|
|
YELLOW=$(printf '\033[1;33m')
|
|
RESET=$(printf '\033[0m')
|
|
|
|
failed=0
|
|
|
|
[ "$(sysctl -n net.ipv4.conf.all.arp_ignore 2>/dev/null || echo unknown)" = "1" ] || failed=1
|
|
[ "$(sysctl -n net.ipv4.conf.all.arp_announce 2>/dev/null || echo unknown)" = "2" ] || failed=1
|
|
|
|
if [ "$failed" -eq 1 ]; then
|
|
>&2 printf "%s" "${YELLOW}"
|
|
>&2 cat <<'EOF'
|
|
══════════════════════════════════════════════════════════════════════════════
|
|
⚠️ WARNING: ARP flux sysctls are not set.
|
|
|
|
Expected values:
|
|
net.ipv4.conf.all.arp_ignore=1
|
|
net.ipv4.conf.all.arp_announce=2
|
|
|
|
Note: If using 'network_mode: host', setting these via docker-compose sysctls
|
|
requires the NET_ADMIN capability. When granted, these sysctls will
|
|
modify the host namespace. Otherwise, you must configure them directly
|
|
on your host operating system instead.
|
|
|
|
Detection accuracy may be reduced until configured.
|
|
|
|
See: https://docs.netalertx.com/docker-troubleshooting/arp-flux-sysctls/
|
|
══════════════════════════════════════════════════════════════════════════════
|
|
EOF
|
|
>&2 printf "%s" "${RESET}"
|
|
fi
|