mathieu revised this gist . Go to revision
1 file changed, 3 deletions
btrfs-backup.sh
| @@ -6,9 +6,6 @@ LOCAL_DEST="/snapshots" | |||
| 6 | 6 | DEST="/run/media/mathieu/ext_ssd/backups" | |
| 7 | 7 | KEEP_LOCAL=10 # Nombre de snapshots locaux à conserver | |
| 8 | 8 | KEEP_DISTANT=31 # Nombre de snapshots distant à conserver | |
| 9 | - | # KEEP_DAILY=7 # Rétention des snapshots distants | |
| 10 | - | # KEEP_WEEKLY=4 | |
| 11 | - | # KEEP_MONTHLY=6 | |
| 12 | 9 | DATE=$(date +"%Y-%m-%d_%H-%M-%S") | |
| 13 | 10 | SNAPSHOT_NAME="$DATE" | |
| 14 | 11 | LAST_RUN_FILE="$DEST/.last_run" | |
mathieu revised this gist . Go to revision
1 file changed, 126 insertions
btrfs-backup.sh(file created)
| @@ -0,0 +1,126 @@ | |||
| 1 | + | #!/usr/bin/env bash | |
| 2 | + | ||
| 3 | + | # Config | |
| 4 | + | SOURCE="/home" | |
| 5 | + | LOCAL_DEST="/snapshots" | |
| 6 | + | DEST="/run/media/mathieu/ext_ssd/backups" | |
| 7 | + | KEEP_LOCAL=10 # Nombre de snapshots locaux à conserver | |
| 8 | + | KEEP_DISTANT=31 # Nombre de snapshots distant à conserver | |
| 9 | + | # KEEP_DAILY=7 # Rétention des snapshots distants | |
| 10 | + | # KEEP_WEEKLY=4 | |
| 11 | + | # KEEP_MONTHLY=6 | |
| 12 | + | DATE=$(date +"%Y-%m-%d_%H-%M-%S") | |
| 13 | + | SNAPSHOT_NAME="$DATE" | |
| 14 | + | LAST_RUN_FILE="$DEST/.last_run" | |
| 15 | + | LAST_SNAPSHOT_FILE="$DEST/.last_snapshot" | |
| 16 | + | ||
| 17 | + | get_age_days() { | |
| 18 | + | local file=$1 | |
| 19 | + | local file_time=$(date -r "$file" +%s) | |
| 20 | + | local current_time=$(date +%s) | |
| 21 | + | echo $(((current_time - file_time) / 86400)) | |
| 22 | + | } | |
| 23 | + | ||
| 24 | + | if ! mountpoint -q "$DEST/.."; then | |
| 25 | + | echo "Erreur: Le disque externe n'est pas monté sur $DEST" | |
| 26 | + | exit 1 | |
| 27 | + | fi | |
| 28 | + | ||
| 29 | + | # Vérifier la dernière exécution | |
| 30 | + | if [ -f "$LAST_RUN_FILE" ]; then | |
| 31 | + | last_run=$(cat "$LAST_RUN_FILE") | |
| 32 | + | days_since_last_run=$((($(date +%s) - $(date -d "$last_run" +%s)) / 86400)) | |
| 33 | + | if [ $days_since_last_run -gt 7 ]; then | |
| 34 | + | echo "Attention: $days_since_last_run jours se sont écoulés depuis la dernière sauvegarde." | |
| 35 | + | fi | |
| 36 | + | else | |
| 37 | + | echo "Première exécution détectée." | |
| 38 | + | fi | |
| 39 | + | ||
| 40 | + | # Créer un nouveau snapshot en lecture seule de /home | |
| 41 | + | if sudo btrfs subvolume snapshot -r "$SOURCE" "$LOCAL_DEST/$SNAPSHOT_NAME"; then | |
| 42 | + | echo "Snapshot local créé avec succès: $LOCAL_DEST/$SNAPSHOT_NAME" | |
| 43 | + | else | |
| 44 | + | echo "Erreur lors de la création du snapshot local" | |
| 45 | + | exit 1 | |
| 46 | + | fi | |
| 47 | + | ||
| 48 | + | # Envoyer le snapshot vers la destination | |
| 49 | + | if [ -f "$LAST_SNAPSHOT_FILE" ]; then | |
| 50 | + | last_snapshot=$(cat "$LAST_SNAPSHOT_FILE") | |
| 51 | + | if [ -d "$LOCAL_DEST/$last_snapshot" ]; then | |
| 52 | + | echo "Envoi d'un snapshot incrémentiel..." | |
| 53 | + | if sudo btrfs send -p "$LOCAL_DEST/$last_snapshot" "$LOCAL_DEST/$SNAPSHOT_NAME" | sudo btrfs receive "$DEST"; then | |
| 54 | + | echo "Snapshot incrémental envoyé avec succès vers $DEST/$SNAPSHOT_NAME" | |
| 55 | + | else | |
| 56 | + | echo "Erreur lors de l'envoi du snapshot incrémentiel. Tentative d'envoi complet..." | |
| 57 | + | if sudo btrfs send "$LOCAL_DEST/$SNAPSHOT_NAME" | sudo btrfs receive "$DEST"; then | |
| 58 | + | echo "Snapshot complet envoyé avec succès vers $DEST/$SNAPSHOT_NAME" | |
| 59 | + | else | |
| 60 | + | echo "Erreur lors de l'envoi du snapshot complet" | |
| 61 | + | sudo btrfs subvolume delete "$LOCAL_DEST/$SNAPSHOT_NAME" | |
| 62 | + | exit 1 | |
| 63 | + | fi | |
| 64 | + | fi | |
| 65 | + | else | |
| 66 | + | echo "Le snapshot précédent n'existe pas localement. Envoi d'un snapshot complet..." | |
| 67 | + | if sudo btrfs send "$LOCAL_DEST/$SNAPSHOT_NAME" | sudo btrfs.receive "$DEST"; then | |
| 68 | + | echo "Snapshot complet envoyé avec succès vers $DEST/$SNAPSHOT_NAME" | |
| 69 | + | else | |
| 70 | + | echo "Erreur lors de l'envoi du snapshot complet" | |
| 71 | + | sudo btrfs subvolume delete "$LOCAL_DEST/$SNAPSHOT_NAME" | |
| 72 | + | exit 1 | |
| 73 | + | fi | |
| 74 | + | fi | |
| 75 | + | else | |
| 76 | + | echo "Aucun snapshot précédent trouvé. Envoi d'un snapshot complet..." | |
| 77 | + | if sudo btrfs send "$LOCAL_DEST/$SNAPSHOT_NAME" | sudo btrfs receive "$DEST"; then | |
| 78 | + | echo "Snapshot complet envoyé avec succès vers $DEST/$SNAPSHOT_NAME" | |
| 79 | + | else | |
| 80 | + | echo "Erreur lors de l'envoi du snapshot complet" | |
| 81 | + | sudo btrfs subvolume delete "$LOCAL_DEST/$SNAPSHOT_NAME" | |
| 82 | + | exit 1 | |
| 83 | + | fi | |
| 84 | + | fi | |
| 85 | + | ||
| 86 | + | # Mettre à jour les fichiers de suivi | |
| 87 | + | date +"%Y-%m-%d %H:%M:%S" >"$LAST_RUN_FILE" | |
| 88 | + | echo "$SNAPSHOT_NAME" >"$LAST_SNAPSHOT_FILE" | |
| 89 | + | ||
| 90 | + | # Fonction de nettoyage des snapshots locaux | |
| 91 | + | cleanup_local_snapshots() { | |
| 92 | + | echo "Nettoyage des snapshots locaux..." | |
| 93 | + | local snapshots=($(ls -1d "$LOCAL_DEST"/20*_*-*-* | sort -r)) | |
| 94 | + | local count=0 | |
| 95 | + | for snapshot in "${snapshots[@]}"; do | |
| 96 | + | if [ $count -ge $KEEP_LOCAL ]; then | |
| 97 | + | echo "Suppression du snapshot local: $snapshot" | |
| 98 | + | sudo btrfs subvolume delete "$snapshot" | |
| 99 | + | fi | |
| 100 | + | count=$((count + 1)) | |
| 101 | + | done | |
| 102 | + | } | |
| 103 | + | ||
| 104 | + | # Fonction de nettoyage des snapshots sur la destination | |
| 105 | + | cleanup_remote_snapshots() { | |
| 106 | + | echo "Nettoyage des snapshots distants..." | |
| 107 | + | cd "$DEST" || exit | |
| 108 | + | ||
| 109 | + | local snapshots=($(ls -1d 20*_*-*-* | sort -r)) | |
| 110 | + | ||
| 111 | + | for snapshot in "${snapshots[@]}"; do | |
| 112 | + | local age=$(get_age_days "$snapshot") | |
| 113 | + | ||
| 114 | + | # Supprimer tous les snapshots plus vieux que 31 jours | |
| 115 | + | if [ $age -gt $KEEP_DISTANT ]; then | |
| 116 | + | echo "Suppression du snapshot distant: $snapshot" | |
| 117 | + | sudo btrfs subvolume delete "$snapshot" | |
| 118 | + | fi | |
| 119 | + | done | |
| 120 | + | } | |
| 121 | + | ||
| 122 | + | # Exécuter le nettoyage | |
| 123 | + | cleanup_local_snapshots | |
| 124 | + | cleanup_remote_snapshots | |
| 125 | + | ||
| 126 | + | echo "Sauvegarde et nettoyage terminés" | |
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