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1 file changed, 83 insertions
gistfile1.txt(Datei erstellt)
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| 1 | + | #!/bin/bash | |
| 2 | + | ||
| 3 | + | # Environment check | |
| 4 | + | ||
| 5 | + | # If migrating from localhost, set this to localhost | |
| 6 | + | if [[ ! $SOURCE_HOST_ADDRESS ]] | |
| 7 | + | then | |
| 8 | + | echo "Please set the current host address in SOURCE_HOST_ADDRESS" | |
| 9 | + | exit 1 | |
| 10 | + | fi | |
| 11 | + | ||
| 12 | + | # If migrating from localhost, set this to $USER | |
| 13 | + | if [[ ! $SOURCE_HOST_USER ]] | |
| 14 | + | then | |
| 15 | + | echo "Please set the current host user in SOURCE_HOST" | |
| 16 | + | exit 1 | |
| 17 | + | fi | |
| 18 | + | ||
| 19 | + | # If migrating to localhost, set this to localhost | |
| 20 | + | if [[ ! $TARGET_HOST_ADDRESS ]] | |
| 21 | + | then | |
| 22 | + | echo "Please set the new host address in TARGET_HOST_ADDRESS" | |
| 23 | + | exit 1 | |
| 24 | + | fi | |
| 25 | + | ||
| 26 | + | # If migrating to localhost, set this to $USER | |
| 27 | + | if [[ ! $TARGET_HOST_USER ]] | |
| 28 | + | then | |
| 29 | + | echo "Please set the new host user in TARGET_HOST_USER" | |
| 30 | + | exit 1 | |
| 31 | + | fi | |
| 32 | + | ||
| 33 | + | # Argument check | |
| 34 | + | ||
| 35 | + | if [[ ! $1 ]] | |
| 36 | + | then | |
| 37 | + | echo "Please supply a docker volume name, as displayed by the command 'docker volume ls'" | |
| 38 | + | exit 1 | |
| 39 | + | fi | |
| 40 | + | volume_name=$1 | |
| 41 | + | ||
| 42 | + | # Export the volume from the current instance | |
| 43 | + | ||
| 44 | + | echo "Exporting volume $volume_name on $SOURCE_HOST_ADDRESS" | |
| 45 | + | ssh "$SOURCE_HOST_USER"@"$SOURCE_HOST_ADDRESS" "\ | |
| 46 | + | mkdir -p \$HOME/docker-volume-backup | |
| 47 | + | docker run \ | |
| 48 | + | --rm \ | |
| 49 | + | -v $volume_name:/volume-backup-source \ | |
| 50 | + | -v \$HOME/docker-volume-backup:/volume-backup-target \ | |
| 51 | + | busybox \ | |
| 52 | + | sh -c 'cd /volume-backup-source && tar cf /volume-backup-target/backup.tar .' \ | |
| 53 | + | " | |
| 54 | + | ||
| 55 | + | ||
| 56 | + | # Transfer the exported volume to the new address | |
| 57 | + | ||
| 58 | + | echo "Transferring exported volume $volume_name from $SOURCE_HOST_ADDRESS to $TARGET_HOST_ADDRESS" | |
| 59 | + | ssh "$TARGET_HOST_USER"@"$TARGET_HOST_ADDRESS" "mkdir -p \$HOME/docker-volume-backup" | |
| 60 | + | scp -3 "$SOURCE_HOST_USER"@"$SOURCE_HOST_ADDRESS":./docker-volume-backup/backup.tar \ | |
| 61 | + | "$TARGET_HOST_USER"@"$TARGET_HOST_ADDRESS":./docker-volume-backup/backup.tar | |
| 62 | + | ||
| 63 | + | ||
| 64 | + | # Restore the backup | |
| 65 | + | ||
| 66 | + | echo "Creating volume $volume_name on $TARGET_HOST_ADDRESS" | |
| 67 | + | ssh "$TARGET_HOST_USER"@"$TARGET_HOST_ADDRESS" "\ | |
| 68 | + | docker volume create $volume_name \ | |
| 69 | + | && docker run \ | |
| 70 | + | --rm \ | |
| 71 | + | -v $volume_name:/volume-backup-target \ | |
| 72 | + | -v \$HOME/docker-volume-backup/:/volume-backup-source \ | |
| 73 | + | busybox \ | |
| 74 | + | sh -c 'cd /volume-backup-target && tar xf /volume-backup-source/backup.tar .' \ | |
| 75 | + | " | |
| 76 | + | ||
| 77 | + | # Clean up residual files | |
| 78 | + | ||
| 79 | + | echo "Cleaning up unnecessary files" | |
| 80 | + | ssh "$SOURCE_HOST_USER"@"$SOURCE_HOST_ADDRESS" "rm -rf \$HOME/docker-volume-backup" | |
| 81 | + | ssh "$TARGET_HOST_USER"@"$TARGET_HOST_ADDRESS" "rm -rf \$HOME/docker-volume-backup" | |
| 82 | + | ||
| 83 | + | echo "Successfully migrated docker volume $volume_name from $SOURCE_HOST_ADDRESS to $TARGET_HOST_ADDRESS" | |
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