From c5fb74df46004f7f060825fb459e63e6d20e55c8 Mon Sep 17 00:00:00 2001
From: "push-app-to-main[bot]"
 <203845782+push-app-to-main[bot]@users.noreply.github.com>
Date: Mon, 23 Mar 2026 15:31:35 +0100
Subject: [PATCH] Add alpine-borgbackup-server (ct) (#13219)

Co-authored-by: push-app-to-main[bot] <203845782+push-app-to-main[bot]@users.noreply.github.com>
---
 ct/alpine-borgbackup-server.sh              | 107 ++++++++++++++++++++
 install/alpine-borgbackup-server-install.sh |  34 +++++++
 2 files changed, 141 insertions(+)
 create mode 100644 ct/alpine-borgbackup-server.sh
 create mode 100644 install/alpine-borgbackup-server-install.sh

diff --git a/ct/alpine-borgbackup-server.sh b/ct/alpine-borgbackup-server.sh
new file mode 100644
index 000000000..2c2c0f51f
--- /dev/null
+++ b/ct/alpine-borgbackup-server.sh
@@ -0,0 +1,107 @@
+#!/usr/bin/env bash
+source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/build.func)
+
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: Sander Koenders (sanderkoenders)
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://www.borgbackup.org/
+
+APP="Alpine-BorgBackup-Server"
+var_tags="${var_tags:-alpine;backup}"
+var_cpu="${var_cpu:-2}"
+var_ram="${var_ram:-1024}"
+var_disk="${var_disk:-20}"
+var_os="${var_os:-alpine}"
+var_version="${var_version:-3.23}"
+var_unprivileged="${var_unprivileged:-1}"
+
+header_info "$APP"
+variables
+color
+catch_errors
+
+function update_script() {
+  header_info
+
+  if [[ ! -f /usr/bin/borg ]]; then
+    msg_error "No ${APP} Installation Found!"
+    exit
+  fi
+
+  CHOICE=$(msg_menu "BorgBackup Server Update Options" \
+    "1" "Update BorgBackup Server" \
+    "2" "Reset SSH Access" \
+    "3" "Enable password authentication for backup user (not recommended, use SSH key instead)" \
+    "4" "Disable password authentication for backup user (recommended for security, use SSH key)")
+
+  case $CHOICE in
+  1)
+    msg_info "Updating $APP LXC"
+    $STD apk -U upgrade
+    msg_ok "Updated $APP LXC successfully!"
+    ;;
+  2)
+    if [[ "${PHS_SILENT:-0}" == "1" ]]; then
+      msg_warn "Reset SSH Public key requires interactive mode, skipping."
+      exit
+    fi
+
+    msg_info "Setting up SSH Public Key for backup user"
+
+    msg_info "Please paste your SSH public key (e.g., ssh-rsa AAAAB3... user@host): \n"
+    read -p "Key: " SSH_PUBLIC_KEY
+    echo
+
+    if [[ -z "$SSH_PUBLIC_KEY" ]]; then
+      msg_error "No SSH public key provided!"
+      exit 1
+    fi
+
+    if [[ ! "$SSH_PUBLIC_KEY" =~ ^(ssh-rsa|ssh-dss|ssh-ed25519|ecdsa-sha2-) ]]; then
+      msg_error "Invalid SSH public key format!"
+      exit 1
+    fi
+
+    msg_info "Setting up SSH access"
+    mkdir -p /home/backup/.ssh
+    echo "$SSH_PUBLIC_KEY" >/home/backup/.ssh/authorized_keys
+
+    chown -R backup:backup /home/backup/.ssh
+    chmod 700 /home/backup/.ssh
+    chmod 600 /home/backup/.ssh/authorized_keys
+
+    msg_ok "SSH access configured for backup user"
+    ;;
+  3)
+    if [[ "${PHS_SILENT:-0}" == "1" ]]; then
+      msg_warn "Enabling password authentication requires interactive mode, skipping."
+      exit
+    fi
+
+    msg_info "Enabling password authentication for backup user"
+    msg_warn "Password authentication is less secure than using SSH keys. Consider using SSH keys instead."
+    passwd backup
+    sed -i 's/^#*\s*PasswordAuthentication\s\+\(yes\|no\)/PasswordAuthentication yes/' /etc/ssh/sshd_config
+    rc-service sshd restart
+    msg_ok "Password authentication enabled for backup user"
+    ;;
+  4)
+    msg_info "Disabling password authentication for backup user"
+    sed -i 's/^#*\s*PasswordAuthentication\s\+\(yes\|no\)/PasswordAuthentication no/' /etc/ssh/sshd_config
+    rc-service sshd restart
+    msg_ok "Password authentication disabled for backup user"
+    ;;
+  esac
+
+  exit 0
+}
+
+start
+build_container
+description
+
+msg_ok "Completed successfully!\n"
+echo -e "${CREATING}${GN}${APP} setup has been successfully initialized!${CL}"
+echo -e "${INFO}${YW}Connection information:${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}ssh backup@${IP}${CL}"
+echo -e "${TAB}${VERIFYPW}${YW}To set SSH key, run this script with the 'update' option and select option 2${CL}"
diff --git a/install/alpine-borgbackup-server-install.sh b/install/alpine-borgbackup-server-install.sh
new file mode 100644
index 000000000..d78f697b5
--- /dev/null
+++ b/install/alpine-borgbackup-server-install.sh
@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: Sander Koenders (sanderkoenders)
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://www.borgbackup.org/
+
+source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
+color
+verb_ip6
+catch_errors
+setting_up_container
+network_check
+update_os
+
+msg_info "Installing BorgBackup"
+$STD apk add --no-cache borgbackup openssh
+$STD rc-update add sshd
+$STD rc-service sshd start
+msg_ok "Installed BorgBackup"
+
+msg_info "Creating backup user"
+$STD adduser -D -s /bin/bash -h /home/backup backup
+$STD passwd -d backup
+msg_ok "Created backup user"
+
+msg_info "Configure SSH, disabling password authentication and enabling public key authentication"
+$STD sed -i -e 's/^#\?PasswordAuthentication.*/PasswordAuthentication no/' /etc/ssh/sshd_config
+$STD rc-service sshd restart
+msg_ok "Configured SSH"
+
+motd_ssh
+customize
+cleanup_lxc