How to fix read: connection timed out in Docker

# Linux
sudo systemctl restart docker

# Verify Docker is running
sudo systemctl status docker

# Test with a simple pull
docker pull hello-world

# In PowerShell (as Administrator)
wsl --shutdown

# Edit Docker daemon configuration
sudo nano /etc/docker/daemon.json

{
  "dns": ["8.8.8.8", "8.8.4.4", "1.1.1.1"]
}

sudo systemctl restart docker

# Remove unused containers, networks, images, and build cache
docker system prune -af

# List all networks and remove orphaned ones
docker network ls
docker network prune

# Check Docker's disk usage
docker system df

# WARNING: This removes volumes too (data loss possible)
docker system prune -af --volumes

# Check current MTU on docker0 interface
ip link show docker0

# If MTU is 1500, try lowering it
sudo ip link set dev docker0 mtu 1400

{
  "mtu": 1400
}

sudo systemctl restart docker

# Create the systemd drop-in directory
sudo mkdir -p /etc/systemd/system/docker.service.d

# Create proxy configuration file
sudo nano /etc/systemd/system/docker.service.d/http-proxy.conf

[Service]
Environment="HTTP_PROXY=http://proxy.example.com:8080"
Environment="HTTPS_PROXY=http://proxy.example.com:8080"
Environment="NO_PROXY=localhost,127.0.0.1,.example.com"

sudo systemctl daemon-reload
sudo systemctl restart docker

# Verify proxy is configured
sudo systemctl show --property=Environment docker

# Set environment variable before running compose commands
export COMPOSE_HTTP_TIMEOUT=200

# Or set it inline
COMPOSE_HTTP_TIMEOUT=200 docker-compose pull
COMPOSE_HTTP_TIMEOUT=200 docker-compose up --build

export COMPOSE_HTTP_TIMEOUT=200

# Build with host networking (bypasses Docker's bridge network)
docker build --network host -t myimage .

docker run --network host -it alpine sh
# Inside container:
wget -O /dev/null https://registry-1.docker.io/v2/

# Edit daemon.json
sudo nano /etc/docker/daemon.json

{
  "registry-mirrors": ["https://mirror.gcr.io"]
}

sudo systemctl restart docker

#!/bin/bash
# retry-pull.sh - Retry docker pull with exponential backoff
IMAGE="$1"
MAX_ATTEMPTS=5
DELAY=10

for i in $(seq 1 $MAX_ATTEMPTS); do
  echo "Attempt $i of $MAX_ATTEMPTS..."
  if docker pull "$IMAGE"; then
    echo "Success!"
    exit 0
  fi
  if [ $i -lt $MAX_ATTEMPTS ]; then
    echo "Failed, waiting ${DELAY}s before retry..."
    sleep $DELAY
    DELAY=$((DELAY * 2))
  fi
done

echo "All attempts failed"
exit 1

chmod +x retry-pull.sh
./retry-pull.sh ubuntu:latest