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KarimMokhtarKarimMokhtar
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Add check-docker-network.sh script for Docker network diagnostics and update docker-compose.yml with gateway IP verification comment
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‎check-docker-network.sh‎

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#!/bin/bash
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# Script to verify Docker network configuration for electrs
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echo "=== DOCKER NETWORK DIAGNOSTIC ==="
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echo ""
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# Check if electrs network exists
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echo "1. Checking electrs-network..."
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docker network inspect electrs-network > /dev/null 2>&1
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if [ $? -eq 0 ]; then
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echo " ✓ electrs-network exists"
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# Get gateway IP
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GATEWAY_IP=$(docker network inspect electrs-network | grep -i gateway | head -1 | awk '{print $2}' | tr -d '",')
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echo " Gateway IP: $GATEWAY_IP"
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# Check what's configured in docker-compose.yml
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CONFIGURED_IP=$(grep "daemon-rpc-addr" docker-compose.yml | grep -oP '\d+\.\d+\.\d+\.\d+' | head -1)
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echo " Configured IP in docker-compose.yml: $CONFIGURED_IP"
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if [ "$GATEWAY_IP" != "$CONFIGURED_IP" ]; then
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echo " ⚠ WARNING: Gateway IP mismatch!"
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echo " The configured IP ($CONFIGURED_IP) doesn't match the actual gateway ($GATEWAY_IP)"
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echo " This will cause connection failures!"
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echo ""
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echo " Fix: Update docker-compose.yml:"
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echo " Change: --daemon-rpc-addr=$CONFIGURED_IP:8332"
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echo " To: --daemon-rpc-addr=$GATEWAY_IP:8332"
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else
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echo " ✓ Gateway IP matches configuration"
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fi
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else
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echo " ✗ electrs-network does not exist"
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echo " Run: docker-compose up -d (this will create the network)"
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fi
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echo ""
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echo "2. Testing bitcoind connection from host..."
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BITCOIND_RESPONSE=$(curl -s --user bitcoinrpc:cab44cb7d0ee18fe1c556ae50bae373c8ea81212179c09cfbdee9425dfcbd516 --data-binary '{"jsonrpc":"1.0","id":"test","method":"getblockchaininfo","params":[]}' -H 'content-type: text/plain;' --max-time 5 http://localhost:8332/ 2>&1)
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if echo "$BITCOIND_RESPONSE" | grep -q "result"; then
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echo " ✓ Bitcoind RPC is accessible from host"
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else
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echo " ✗ Bitcoind RPC is NOT accessible from host"
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echo " Response: $BITCOIND_RESPONSE"
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fi
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echo ""
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echo "3. Testing bitcoind connection from Docker network..."
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if [ ! -z "$GATEWAY_IP" ]; then
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DOCKER_TEST=$(docker run --rm --network electrs-network curlimages/curl:latest curl -s --max-time 5 --user bitcoinrpc:cab44cb7d0ee18fe1c556ae50bae373c8ea81212179c09cfbdee9425dfcbd516 --data-binary '{"jsonrpc":"1.0","id":"test","method":"getblockchaininfo","params":[]}' -H 'content-type: text/plain;' http://$GATEWAY_IP:8332/ 2>&1)
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if echo "$DOCKER_TEST" | grep -q "result"; then
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echo " ✓ Bitcoind RPC is accessible from Docker network at $GATEWAY_IP:8332"
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else
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echo " ✗ Bitcoind RPC is NOT accessible from Docker network at $GATEWAY_IP:8332"
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echo " This is the problem! Check bitcoind firewall/rpcallowip settings"
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fi
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fi
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echo ""
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echo "4. Checking electrs container network..."
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ELECTRS_IP=$(docker inspect electrs --format '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' 2>/dev/null)
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if [ ! -z "$ELECTRS_IP" ]; then
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echo " Electrs container IP: $ELECTRS_IP"
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echo " ✓ Electrs container is running"
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else
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echo " ✗ Electrs container is not running"
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fi
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echo ""
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echo "5. Checking for connection issues..."
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CONNECTION_COUNT=$(ss -tnp | grep :8332 | grep ESTAB | wc -l)
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FIN_WAIT=$(ss -tnp | grep :8332 | grep FIN-WAIT | wc -l)
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echo " Established connections to bitcoind: $CONNECTION_COUNT"
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echo " Connections in FIN-WAIT state: $FIN_WAIT"
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if [ "$FIN_WAIT" -gt 10 ]; then
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echo " ⚠ WARNING: Many connections in FIN-WAIT state - connection cleanup issues"
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fi
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echo ""
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echo "=== SUMMARY ==="
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if [ "$GATEWAY_IP" != "$CONFIGURED_IP" ] && [ ! -z "$GATEWAY_IP" ] && [ ! -z "$CONFIGURED_IP" ]; then
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echo "⚠ ACTION REQUIRED: Update docker-compose.yml with correct gateway IP: $GATEWAY_IP"
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echo ""
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echo "Run this command to fix:"
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echo "sed -i 's|--daemon-rpc-addr=$CONFIGURED_IP:8332|--daemon-rpc-addr=$GATEWAY_IP:8332|g' docker-compose.yml"
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else
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echo "✓ Network configuration looks correct"
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fi
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‎docker-compose.yml‎

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- "--db-dir=/data/db"
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- "--daemon-dir=/bitcoin"
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- "--blocks-dir=/bitcoin-blocks"
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# Verify gateway IP with: docker network inspect electrs-network | grep Gateway
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- "--daemon-rpc-addr=172.18.0.1:8332"
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- "--cookie=bitcoinrpc:PLACEHOLDER_PASSWORD"
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- "--http-addr=0.0.0.0:3000"
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- "-vvv"
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- "--timestamp"
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healthcheck:
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test: ["CMD", "curl", "-f", "http://localhost:3000/api/blocks/tip/height"]
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interval: 30s
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timeout: 10s
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retries: 3
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start_period: 300s
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test: ["CMD", "curl", "-f", "--max-time", "30", "http://localhost:3000/api/blocks/tip/height"]
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interval: 60s
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timeout: 30s
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retries: 5
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start_period: 600s
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extra_hosts:
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- "host.docker.internal:host-gateway"
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ulimits:
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nofile:
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soft: 100000
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hard: 100000
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# Optional: Add memory limit to prevent OOM issues
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# mem_limit: 16g
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# mem_reservation: 8g
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nginx:
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image: nginx:alpine

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