Add migrate.sh
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110
migrate.sh
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110
migrate.sh
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#!/bin/bash
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# Usage: curl -sL https://your-cdn/migrate.sh | bash -s -- <LOCAL_ID> <USER@REMOTE_IP> <REMOTE_ID>
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LOCAL_SEARCH="$1"
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DEST_CONN="$2"
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REMOTE_SEARCH="$3"
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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NC='\033[0m'
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# --- 1. PRE-FLIGHT & SSH CHECK ---
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if [ -z "$REMOTE_SEARCH" ]; then
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echo -e "${RED}Usage: $0 <Local_Container_Name> <User@Remote_IP> <Remote_Container_Name>${NC}"
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echo -e "Example: $0 postgres-old root@10.0.0.5 postgres-new"
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exit 1
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fi
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echo -e "⚠️ ${YELLOW}REMINDER:${NC} Ensure SSH keys are set up: ${GREEN}ssh-copy-id $DEST_CONN${NC}"
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if ! ssh -o BatchMode=yes -o ConnectTimeout=5 "$DEST_CONN" echo "SSH OK" >/dev/null 2>&1; then
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echo -e "${RED}Error: SSH connection to $DEST_CONN failed.${NC}"
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exit 1
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fi
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# --- 2. IDENTIFY CONTAINERS ---
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echo -e "\n🔍 Finding containers..."
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# Local
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L_ID=$(docker ps -aq --filter "name=${LOCAL_SEARCH}" | head -n 1)
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L_NAME=$(docker ps -a --filter "name=${LOCAL_SEARCH}" --format "{{.Names}}" | head -n 1)
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# Remote (via SSH)
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R_ID=$(ssh "$DEST_CONN" "docker ps -aq --filter 'name=${REMOTE_SEARCH}' | head -n 1")
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R_NAME=$(ssh "$DEST_CONN" "docker ps -a --filter 'name=${REMOTE_SEARCH}' --format '{{.Names}}' | head -n 1")
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if [ -z "$L_ID" ] || [ -z "$R_ID" ]; then
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echo -e "${RED}Error: Could not find containers.${NC}"
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echo "Local Found: ${L_ID:-None} | Remote Found: ${R_ID:-None}"
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exit 1
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fi
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echo -e " Source: ${GREEN}$L_NAME${NC} ($L_ID)"
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echo -e " Target: ${GREEN}$R_NAME${NC} ($R_ID) on $DEST_CONN"
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# --- 3. STOP CONTAINERS (SAFE MODE) ---
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echo -e "\n🛑 ${RED}Stopping BOTH containers to ensure safe data transfer...${NC}"
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docker stop "$L_ID"
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ssh "$DEST_CONN" "docker stop $R_ID"
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# --- 4. MAP & SYNC VOLUMES ---
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echo -e "\n📦 Analyzing Volume Maps..."
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# Get list of internal mount targets from Source (Where data lives inside the container)
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# Format: Type|SourcePath|DestinationPath
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L_MOUNTS=$(docker inspect -f '{{range .Mounts}}{{.Type}}|{{.Source}}|{{.Destination}} {{end}}' "$L_ID")
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for MOUNT in $L_MOUNTS; do
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TYPE=$(echo "$MOUNT" | cut -d'|' -f1)
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L_PATH=$(echo "$MOUNT" | cut -d'|' -f2)
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INTERNAL_TARGET=$(echo "$MOUNT" | cut -d'|' -f3)
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# skip bind mounts that are likely system files (docker.sock, etc)
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if [[ "$INTERNAL_TARGET" == *".sock" ]] || [[ "$INTERNAL_TARGET" == *".conf" ]]; then
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echo " Skipping config/system file: $INTERNAL_TARGET"
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continue
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fi
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echo -e "\n 🔄 Processing mount at ${YELLOW}$INTERNAL_TARGET${NC}"
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# Find the corresponding volume/path on the REMOTE container
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# We look for the mount that shares the same INTERNAL destination
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R_PATH_RAW=$(ssh "$DEST_CONN" "docker inspect -f '{{range .Mounts}}{{if eq .Destination \"$INTERNAL_TARGET\"}}{{.Source}}{{end}}{{end}}' $R_ID")
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if [ -z "$R_PATH_RAW" ]; then
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echo -e " ${RED}Warning: Target container has no matching volume for $INTERNAL_TARGET. Skipping.${NC}"
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continue
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fi
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# If it's a Docker volume, we need the real filesystem path (Mountpoint)
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if [ "$TYPE" == "volume" ]; then
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# L_PATH is already the volume name, we need the path
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REAL_L_PATH=$(docker volume inspect --format '{{.Mountpoint}}' "$L_PATH")
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# Remote might be a volume too, get its path
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R_VOL_NAME=$(basename "$R_PATH_RAW") # Assuming standard docker volume path structure or just name
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# Safest way: inspect the remote volume name if it looks like a volume
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REAL_R_PATH=$(ssh "$DEST_CONN" "docker volume inspect --format '{{.Mountpoint}}' $R_PATH_RAW 2>/dev/null || echo $R_PATH_RAW")
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else
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REAL_L_PATH="$L_PATH"
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REAL_R_PATH="$R_PATH_RAW"
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fi
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echo " Source (A): $REAL_L_PATH"
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echo " Target (B): $REAL_R_PATH"
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# RSYNC
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echo " 🚀 Syncing..."
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# Ensure trailing slashes for rsync to copy CONTENTS, not the folder itself
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rsync -az --info=progress2 -e ssh "${REAL_L_PATH}/" "$DEST_CONN:${REAL_R_PATH}/"
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done
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# --- 5. RESTART ---
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echo -e "\n✅ Migration Complete."
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echo -e " Starting Remote Container ($R_NAME)..."
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ssh "$DEST_CONN" "docker start $R_ID"
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echo -e " Starting Local Container ($L_NAME)..."
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docker start "$L_ID"
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echo -e "\n🎉 ${GREEN}Done! Check your new server.${NC}"
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