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feat: add ENABLE_DOCKER_DNS env var for service discovery

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Adds configurable Docker embedded DNS (127.0.0.11) passthrough for
container service name resolution. Enabled by default to support
typical Docker Compose use cases.
This commit is contained in:
Mathieu Virbel
2025-12-01 18:26:10 -06:00
parent 314ee9dbe6
commit eea68dbdd0
2 changed files with 8 additions and 0 deletions
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7
network-filter.sh
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@@ -12,12 +12,14 @@ setup_env() {
DNS_SERVERS="${DNS_SERVERS:-8.8.8.8,8.8.4.4}"
RUN_SELFTEST="${RUN_SELFTEST:-false}"
IPSET_TIMEOUT="${IPSET_TIMEOUT:-600}" # 10 minutes default
ENABLE_DOCKER_DNS="${ENABLE_DOCKER_DNS:-true}" # Enable Docker embedded DNS for service discovery
echo "--- Configuration ---"
echo "DNS Servers: $DNS_SERVERS"
echo "Allowed Domains: $ALLOWED_DOMAINS"
echo "IPSet Timeout: $IPSET_TIMEOUT seconds"
echo "Run Selftest on start: $RUN_SELFTEST"
echo "Docker DNS (127.0.0.11): $ENABLE_DOCKER_DNS"
}
# --- Domain Parsing ---
@@ -130,6 +132,11 @@ log-queries
filter-AAAA
EOF
# Add Docker embedded DNS for service discovery if enabled
if [[ "$ENABLE_DOCKER_DNS" == "true" ]]; then
echo "server=127.0.0.11" >> /etc/dnsmasq.conf
fi
# Add server and ipset entries for all domains
for domain in "${!DOMAIN_PORTSET[@]}"; do
echo "server=/${domain}/${PRIMARY_DNS}" >> /etc/dnsmasq.conf