138 lines
3.7 KiB
Bash
138 lines
3.7 KiB
Bash
#!/usr/bin/env bash
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set -Eeuo pipefail
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usage() {
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cat <<'EOF'
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Usage:
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restore-from-s3.sh latest
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restore-from-s3.sh <s3-object-key>
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Examples:
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restore-from-s3.sh latest
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restore-from-s3.sh qlockify/qlockify-backup-YYYYMMDD-HHMMSS.tar.gz.enc
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Environment:
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DEPLOY_ROOT Deployment directory. Defaults to ~/qlockify-deployment.
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S3_BACKUP_BUCKET S3 bucket name.
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S3_BACKUP_PREFIX S3 object prefix. Defaults to qlockify.
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S3_BACKUP_REGION S3 region. Defaults to us-east-1.
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S3_BACKUP_ENDPOINT_URL Optional S3-compatible endpoint URL.
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S3_BACKUP_ACCESS_KEY_ID S3 access key.
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S3_BACKUP_SECRET_ACCESS_KEY S3 secret key.
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BACKUP_ENCRYPTION_PASSPHRASE Passphrase used to decrypt backup archives.
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Existing RESTORE_SKIP_DB, RESTORE_SKIP_MEDIA, and RESTORE_SKIP_ENV flags are
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passed through to restore.sh.
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EOF
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}
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log() {
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printf '[restore-s3] %s\n' "$*"
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}
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fail() {
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printf '[restore-s3] %s\n' "$*" >&2
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exit 1
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}
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require_var() {
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local name="$1"
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[[ -n "${!name:-}" ]] || fail "$name is required"
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}
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load_env() {
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local env_path="$1"
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[[ -f "$env_path" ]] || fail "Deployment env file not found: $env_path"
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set -a
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# shellcheck disable=SC1090
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. "$env_path"
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set +a
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}
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aws_s3() {
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if [[ -n "${S3_BACKUP_ENDPOINT_URL:-}" ]]; then
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aws --endpoint-url "$S3_BACKUP_ENDPOINT_URL" s3 "$@"
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else
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aws s3 "$@"
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fi
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}
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normalize_prefix() {
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local value="${1:-qlockify}"
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value="${value#/}"
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value="${value%/}"
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printf '%s' "$value"
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}
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latest_object_key() {
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aws_s3 ls "s3://$S3_BACKUP_BUCKET/$S3_BACKUP_PREFIX/" --recursive \
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| awk '{print $4}' \
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| grep '\.tar\.gz\.enc$' \
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| sort \
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| tail -n 1
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}
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if [[ "${1:-}" == "-h" || "${1:-}" == "--help" ]]; then
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usage
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exit 0
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fi
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REQUESTED_KEY="${1:-}"
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[[ -n "$REQUESTED_KEY" ]] || {
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usage
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exit 1
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}
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command -v aws >/dev/null 2>&1 || fail "aws CLI is required"
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command -v openssl >/dev/null 2>&1 || fail "openssl is required"
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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DEPLOY_ROOT="${DEPLOY_ROOT:-$(cd "$SCRIPT_DIR/.." && pwd)}"
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DEPLOY_ENV="$DEPLOY_ROOT/.env"
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RESTORE_SCRIPT="$SCRIPT_DIR/restore.sh"
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[[ -x "$RESTORE_SCRIPT" ]] || fail "Restore script is not executable: $RESTORE_SCRIPT"
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load_env "$DEPLOY_ENV"
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S3_BACKUP_PREFIX="$(normalize_prefix "${S3_BACKUP_PREFIX:-qlockify}")"
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S3_BACKUP_REGION="${S3_BACKUP_REGION:-us-east-1}"
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require_var S3_BACKUP_BUCKET
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require_var S3_BACKUP_ACCESS_KEY_ID
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require_var S3_BACKUP_SECRET_ACCESS_KEY
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require_var BACKUP_ENCRYPTION_PASSPHRASE
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export AWS_ACCESS_KEY_ID="$S3_BACKUP_ACCESS_KEY_ID"
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export AWS_SECRET_ACCESS_KEY="$S3_BACKUP_SECRET_ACCESS_KEY"
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export AWS_DEFAULT_REGION="$S3_BACKUP_REGION"
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export AWS_EC2_METADATA_DISABLED=true
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if [[ "$REQUESTED_KEY" == "latest" ]]; then
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log "Resolving latest encrypted backup object"
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OBJECT_KEY="$(latest_object_key)"
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[[ -n "$OBJECT_KEY" ]] || fail "No encrypted backups found in s3://$S3_BACKUP_BUCKET/$S3_BACKUP_PREFIX/"
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else
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OBJECT_KEY="${REQUESTED_KEY#s3://$S3_BACKUP_BUCKET/}"
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fi
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WORK_DIR="$(mktemp -d)"
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trap 'rm -rf "$WORK_DIR"' EXIT
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ENCRYPTED_PATH="$WORK_DIR/$(basename "$OBJECT_KEY")"
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DECRYPTED_PATH="$WORK_DIR/${ENCRYPTED_PATH##*/}"
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DECRYPTED_PATH="${DECRYPTED_PATH%.enc}"
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log "Downloading encrypted backup from s3://$S3_BACKUP_BUCKET/$OBJECT_KEY"
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aws_s3 cp "s3://$S3_BACKUP_BUCKET/$OBJECT_KEY" "$ENCRYPTED_PATH" --only-show-errors
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log "Decrypting backup archive"
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openssl enc -d -aes-256-cbc -pbkdf2 -iter 200000 \
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-in "$ENCRYPTED_PATH" \
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-out "$DECRYPTED_PATH" \
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-pass env:BACKUP_ENCRYPTION_PASSPHRASE
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log "Restoring decrypted backup archive"
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DEPLOY_ROOT="$DEPLOY_ROOT" "$RESTORE_SCRIPT" "$DECRYPTED_PATH"
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log "S3 restore completed from: s3://$S3_BACKUP_BUCKET/$OBJECT_KEY"
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