a987d45fbc
Set up three-tier synchronization: Syncthing (real-time), GitHub (version control), rsync (disaster recovery). Includes complete documentation for future Claude sessions. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
97 lines
2.1 KiB
Bash
Executable file
97 lines
2.1 KiB
Bash
Executable file
#!/bin/bash
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# Module 7: Networks
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cat << 'EOF'
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---
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## 7️⃣ NETWORKS
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### Docker Networks Overview
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EOF
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NETWORK_COUNT=$(docker network ls | grep -v NETWORK | wc -l)
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echo "**Total Networks:** $NETWORK_COUNT"
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echo ""
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echo "### Network Details"
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echo ""
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docker network ls --format '{{.Name}}|{{.Driver}}|{{.Scope}}' | grep -v 'NETWORK' | while IFS='|' read -r name driver scope; do
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CONTAINERS=$(docker network inspect "$name" -f '{{range .Containers}}{{.Name}}, {{end}}' 2>/dev/null | sed 's/, $//')
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CONTAINER_COUNT=$(echo "$CONTAINERS" | grep -o ',' | wc -l)
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((CONTAINER_COUNT++))
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SUBNET=$(docker network inspect "$name" -f '{{range .IPAM.Config}}{{.Subnet}}{{end}}' 2>/dev/null)
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GATEWAY=$(docker network inspect "$name" -f '{{range .IPAM.Config}}{{.Gateway}}{{end}}' 2>/dev/null)
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if [[ -z "$CONTAINERS" ]]; then
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CONTAINERS="(no containers attached)"
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CONTAINER_COUNT=0
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fi
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cat << NETINFO
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#### 🌐 **$name**
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- **Driver:** $driver
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- **Scope:** $scope
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- **Subnet:** ${SUBNET:-N/A}
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- **Gateway:** ${GATEWAY:-N/A}
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- **Connected Containers:** $CONTAINER_COUNT
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- **Container List:** $CONTAINERS
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NETINFO
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done
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cat << 'EOF'
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### Network Management Commands
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```bash
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# List all networks
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docker network ls
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# Inspect network
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docker network inspect <network-name>
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# Create new network
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docker network create --driver bridge my-network
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# Connect container to network
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docker network connect <network-name> <container-name>
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# Disconnect container from network
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docker network disconnect <network-name> <container-name>
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# Remove unused networks
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docker network prune -f
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```
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### Common Network Issues
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#### Container can't reach another container
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```bash
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# Check if both are on same network
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docker network inspect <network-name>
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# Check container IP
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docker inspect <container-name> | grep IPAddress
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# Test connectivity
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docker exec <container1> ping <container2>
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```
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#### DNS resolution not working
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```bash
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# Check Docker DNS
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docker exec <container> cat /etc/resolv.conf
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# Test DNS
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docker exec <container> nslookup google.com
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# Restart Docker daemon if needed
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sudo systemctl restart docker
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```
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EOF
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