New lxc : Langflow

ct/langflow.sh

@@ -0,0 +1,168 @@
+#!/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: Yamon
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://www.langflow.org/
+
+APP="Langflow"
+var_tags="${var_tags:-ai;interface}"
+var_cpu="${var_cpu:-2}"
+var_ram="${var_ram:-12288}"
+var_disk="${var_disk:-16}"
+var_os="${var_os:-debian}"
+var_version="${var_version:-13}"
+var_unprivileged="${var_unprivileged:-1}"
+
+header_info "$APP"
+variables
+color
+catch_errors
+
+function update_script() {
+  header_info
+  check_container_storage
+  check_container_resources
+
+  if [[ ! -d /opt/langflow || ! -f /etc/systemd/system/langflow.service || ! -x /opt/langflow/.venv/bin/python ]]; then
+    msg_error "No ${APP} Installation Found!"
+    exit
+  fi
+
+  local TS BACKUP_DIR OLD_VERSION TARGET_VERSION
+  TS="$(date +%Y%m%d-%H%M%S)"
+  BACKUP_DIR="/opt/langflow/backups/${TS}"
+  TARGET_VERSION="${LANGFLOW_TARGET_VERSION:-latest}"
+  OLD_VERSION="$([ -x /opt/langflow/.venv/bin/python ] && /opt/langflow/.venv/bin/python -m pip show langflow 2>/dev/null | awk '/^Version:/ {print $2}')"
+  LATEST_VERSION="$(get_latest_github_release "langflow-ai/langflow" 2>/dev/null || echo "unknown")"
+
+  msg_info "Installed Version: ${OLD_VERSION:-unknown} | Latest Upstream: ${LATEST_VERSION}"
+
+  msg_info "Preparing Backup"
+  mkdir -p "${BACKUP_DIR}"
+  cp -a /opt/langflow/.env "${BACKUP_DIR}/.env" 2>/dev/null || true
+  cp -a /opt/langflow/data/langflow.db* "${BACKUP_DIR}/" 2>/dev/null || true
+  msg_ok "Backup saved to ${BACKUP_DIR}"
+
+  msg_info "Stopping Service"
+  systemctl stop langflow
+  msg_ok "Stopped Service"
+
+  PYTHON_VERSION="3.12" setup_uv
+  UV_CONCURRENT_DOWNLOADS="${UV_CONCURRENT_DOWNLOADS:-2}"
+  UV_CONCURRENT_BUILDS="${UV_CONCURRENT_BUILDS:-1}"
+  UV_CONCURRENT_INSTALLS="${UV_CONCURRENT_INSTALLS:-1}"
+  LANGFLOW_NO_CACHE="${LANGFLOW_NO_CACHE:-false}"
+  UV_CACHE_ARGS=()
+  if [[ "${LANGFLOW_NO_CACHE,,}" == "true" || "${LANGFLOW_NO_CACHE}" == "1" ]]; then
+    UV_CACHE_ARGS+=(--no-cache)
+  fi
+
+  msg_info "Pinning CPU Torch"
+  if ! $STD env \
+    UV_CONCURRENT_DOWNLOADS="${UV_CONCURRENT_DOWNLOADS}" \
+    UV_CONCURRENT_BUILDS="${UV_CONCURRENT_BUILDS}" \
+    UV_CONCURRENT_INSTALLS="${UV_CONCURRENT_INSTALLS}" \
+    uv pip install --python /opt/langflow/.venv/bin/python "${UV_CACHE_ARGS[@]}" \
+    --index-strategy unsafe-best-match \
+    --index-url https://download.pytorch.org/whl/cpu \
+    --extra-index-url https://pypi.org/simple \
+    "torch==2.8.0+cpu"; then
+    msg_error "Failed to install CPU torch"
+    exit 1
+  fi
+  msg_ok "Pinned CPU Torch"
+
+  msg_info "Updating Langflow (${TARGET_VERSION})"
+  if [[ "${TARGET_VERSION}" == "latest" ]]; then
+    if ! $STD env \
+      UV_CONCURRENT_DOWNLOADS="${UV_CONCURRENT_DOWNLOADS}" \
+      UV_CONCURRENT_BUILDS="${UV_CONCURRENT_BUILDS}" \
+      UV_CONCURRENT_INSTALLS="${UV_CONCURRENT_INSTALLS}" \
+      uv pip install --python /opt/langflow/.venv/bin/python "${UV_CACHE_ARGS[@]}" --upgrade langflow; then
+      msg_error "Langflow update failed"
+      if [[ -n "${OLD_VERSION}" ]]; then
+        msg_info "Rolling back to ${OLD_VERSION}"
+        $STD env \
+          UV_CONCURRENT_DOWNLOADS="${UV_CONCURRENT_DOWNLOADS}" \
+          UV_CONCURRENT_BUILDS="${UV_CONCURRENT_BUILDS}" \
+          UV_CONCURRENT_INSTALLS="${UV_CONCURRENT_INSTALLS}" \
+          uv pip install --python /opt/langflow/.venv/bin/python "${UV_CACHE_ARGS[@]}" "langflow==${OLD_VERSION}" || true
+      fi
+      cp -a "${BACKUP_DIR}/.env" /opt/langflow/.env 2>/dev/null || true
+      cp -a "${BACKUP_DIR}/langflow.db"* /opt/langflow/data/ 2>/dev/null || true
+      systemctl start langflow || true
+      exit 1
+    fi
+  else
+    if ! $STD env \
+      UV_CONCURRENT_DOWNLOADS="${UV_CONCURRENT_DOWNLOADS}" \
+      UV_CONCURRENT_BUILDS="${UV_CONCURRENT_BUILDS}" \
+      UV_CONCURRENT_INSTALLS="${UV_CONCURRENT_INSTALLS}" \
+      uv pip install --python /opt/langflow/.venv/bin/python "${UV_CACHE_ARGS[@]}" "langflow==${TARGET_VERSION}"; then
+      msg_error "Langflow update to ${TARGET_VERSION} failed"
+      if [[ -n "${OLD_VERSION}" ]]; then
+        msg_info "Rolling back to ${OLD_VERSION}"
+        $STD env \
+          UV_CONCURRENT_DOWNLOADS="${UV_CONCURRENT_DOWNLOADS}" \
+          UV_CONCURRENT_BUILDS="${UV_CONCURRENT_BUILDS}" \
+          UV_CONCURRENT_INSTALLS="${UV_CONCURRENT_INSTALLS}" \
+          uv pip install --python /opt/langflow/.venv/bin/python "${UV_CACHE_ARGS[@]}" "langflow==${OLD_VERSION}" || true
+      fi
+      cp -a "${BACKUP_DIR}/.env" /opt/langflow/.env 2>/dev/null || true
+      cp -a "${BACKUP_DIR}/langflow.db"* /opt/langflow/data/ 2>/dev/null || true
+      systemctl start langflow || true
+      exit 1
+    fi
+  fi
+  msg_ok "Updated Langflow"
+
+  msg_info "Starting Service"
+  systemctl start langflow
+
+  if [[ "$(systemctl is-active langflow)" != "active" ]]; then
+    msg_error "Service failed to start"
+    if [[ -n "${OLD_VERSION}" ]]; then
+      msg_info "Rolling back to ${OLD_VERSION}"
+      $STD env \
+        UV_CONCURRENT_DOWNLOADS="${UV_CONCURRENT_DOWNLOADS}" \
+        UV_CONCURRENT_BUILDS="${UV_CONCURRENT_BUILDS}" \
+        UV_CONCURRENT_INSTALLS="${UV_CONCURRENT_INSTALLS}" \
+        uv pip install --python /opt/langflow/.venv/bin/python "${UV_CACHE_ARGS[@]}" "langflow==${OLD_VERSION}" || true
+      cp -a "${BACKUP_DIR}/.env" /opt/langflow/.env 2>/dev/null || true
+      cp -a "${BACKUP_DIR}/langflow.db"* /opt/langflow/data/ 2>/dev/null || true
+      systemctl restart langflow || true
+    fi
+    exit 1
+  fi
+
+  msg_info "Running Health Check"
+  ensure_dependencies curl || true
+  if command -v curl >/dev/null 2>&1; then
+    for _ in {1..30}; do
+      if curl -fsS http://127.0.0.1:7860/ >/dev/null 2>&1; then
+        break
+      fi
+      sleep 2
+    done
+    if ! curl -fsS http://127.0.0.1:7860/ >/dev/null 2>&1; then
+      msg_error "Health check failed. Check logs: journalctl -u langflow -n 100"
+      exit 1
+    fi
+  else
+    msg_info "curl not available, skipping HTTP health check"
+  fi
+  msg_ok "Health check passed"
+  msg_info "If migration errors occur, review Langflow docs before using 'langflow migration --fix'"
+  msg_ok "Updated successfully!"
+  exit
+}
+
+start
+build_container
+description
+
+msg_ok "Completed successfully!\n"
+echo -e "${CREATING}${GN}${APP} setup has been successfully initialized!${CL}"
+echo -e "${INFO}${YW} Access it using the following URL:${CL}"
+echo -e "${TAB}${GATEWAY}${BGN}http://${IP}:7860${CL}"

frontend/public/json/langflow.json

@@ -0,0 +1,52 @@
+{
+  "name": "Langflow",
+  "slug": "langflow",
+  "categories": [
+    20
+  ],
+  "date_created": "2026-02-21",
+  "type": "ct",
+  "updateable": true,
+  "privileged": false,
+  "interface_port": 7860,
+  "documentation": "https://docs.langflow.org/",
+  "website": "https://www.langflow.org/",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/langflow.webp",
+  "config_path": "/opt/langflow/.env",
+  "description": "Langflow is an open-source visual framework for building LLM workflows and multi-agent applications with a drag-and-drop interface.",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "ct/langflow.sh",
+      "resources": {
+        "cpu": 2,
+        "ram": 12288,
+        "hdd": 16,
+        "os": "debian",
+        "version": "13"
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": "admin",
+    "password": null
+  },
+  "notes": [
+    {
+      "text": "Use `cat ~/langflow.creds` to view generated admin credentials and access URL.",
+      "type": "info"
+    },
+    {
+      "text": "Exposed port: 7860",
+      "type": "info"
+    },
+    {
+      "text": "Change the default admin password after first login.",
+      "type": "warning"
+    },
+    {
+      "text": "Installation and updates can take a long time due to large Python dependencies.",
+      "type": "warning"
+    }
+  ]
+}

install/langflow-install.sh

@@ -0,0 +1,137 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021-2026 community-scripts ORG
+# Author: Yamon
+# License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
+# Source: https://www.langflow.org/
+
+source /dev/stdin <<<"$FUNCTIONS_FILE_PATH"
+color
+verb_ip6
+catch_errors
+setting_up_container
+network_check
+update_os
+
+msg_info "Installing Dependencies"
+if ! install_packages_with_retry \
+  build-essential \
+  python3-dev \
+  curl \
+  git; then
+  msg_error "Failed to install dependencies"
+  exit 1
+fi
+msg_ok "Installed Dependencies"
+
+PYTHON_VERSION="3.12" setup_uv
+LANGFLOW_VERSION="${LANGFLOW_VERSION:-1.7.3}"
+APPLICATION="Langflow"
+UV_CONCURRENT_DOWNLOADS="${UV_CONCURRENT_DOWNLOADS:-2}"
+UV_CONCURRENT_BUILDS="${UV_CONCURRENT_BUILDS:-1}"
+UV_CONCURRENT_INSTALLS="${UV_CONCURRENT_INSTALLS:-1}"
+LANGFLOW_NO_CACHE="${LANGFLOW_NO_CACHE:-false}"
+UV_CACHE_ARGS=()
+if [[ "${LANGFLOW_NO_CACHE,,}" == "true" || "${LANGFLOW_NO_CACHE}" == "1" ]]; then
+  UV_CACHE_ARGS+=(--no-cache)
+fi
+
+msg_info "Installing Langflow"
+mkdir -p /opt/langflow/data
+cd /opt/langflow
+$STD uv venv --clear /opt/langflow/.venv
+$STD /opt/langflow/.venv/bin/python -m ensurepip --upgrade
+$STD /opt/langflow/.venv/bin/python -m pip install --upgrade pip
+PYTHON_VENV_VERSION="$("/opt/langflow/.venv/bin/python" -c 'import sys; print(f"{sys.version_info.major}.{sys.version_info.minor}")')"
+verify_tool_version "python" "3.12" "${PYTHON_VENV_VERSION}" || true
+$STD env \
+  UV_CONCURRENT_DOWNLOADS="${UV_CONCURRENT_DOWNLOADS}" \
+  UV_CONCURRENT_BUILDS="${UV_CONCURRENT_BUILDS}" \
+  UV_CONCURRENT_INSTALLS="${UV_CONCURRENT_INSTALLS}" \
+  uv pip install --python /opt/langflow/.venv/bin/python "${UV_CACHE_ARGS[@]}" \
+  --index-strategy unsafe-best-match \
+  --index-url https://download.pytorch.org/whl/cpu \
+  --extra-index-url https://pypi.org/simple \
+  "torch==2.8.0+cpu"
+$STD env \
+  UV_CONCURRENT_DOWNLOADS="${UV_CONCURRENT_DOWNLOADS}" \
+  UV_CONCURRENT_BUILDS="${UV_CONCURRENT_BUILDS}" \
+  UV_CONCURRENT_INSTALLS="${UV_CONCURRENT_INSTALLS}" \
+  uv pip install --python /opt/langflow/.venv/bin/python "${UV_CACHE_ARGS[@]}" "langflow==${LANGFLOW_VERSION}"
+msg_ok "Installed Langflow"
+
+msg_info "Configuring Langflow"
+get_lxc_ip
+LOCAL_IP="${LOCAL_IP:-$IP}"
+APP_NAME="Langflow"
+ADMIN_USER="admin"
+ADMIN_PASS="$(openssl rand -base64 32 | tr -dc 'A-Za-z0-9' | head -c 20)"
+if [[ ${#ADMIN_PASS} -lt 12 ]]; then
+  ADMIN_PASS="$(openssl rand -hex 16)"
+fi
+LANGFLOW_SECRET_KEY=$(openssl rand -base64 48 | tr -d '\n')
+CPU_CORES="$(nproc 2>/dev/null || echo 2)"
+if [[ "${CPU_CORES}" -ge 8 ]]; then
+  LANGFLOW_WORKERS_DEFAULT=4
+elif [[ "${CPU_CORES}" -ge 4 ]]; then
+  LANGFLOW_WORKERS_DEFAULT=2
+else
+  LANGFLOW_WORKERS_DEFAULT=1
+fi
+cat <<EOF2 >/opt/langflow/.env
+LANGFLOW_CONFIG_DIR=/opt/langflow/data
+LANGFLOW_SAVE_DB_IN_CONFIG_DIR=true
+LANGFLOW_DATABASE_URL=sqlite:////opt/langflow/data/langflow.db
+LANGFLOW_SECRET_KEY=${LANGFLOW_SECRET_KEY}
+LANGFLOW_AUTO_LOGIN=false
+LANGFLOW_SUPERUSER=${ADMIN_USER}
+LANGFLOW_SUPERUSER_PASSWORD=${ADMIN_PASS}
+LANGFLOW_HOST=0.0.0.0
+LANGFLOW_PORT=7860
+LANGFLOW_OPEN_BROWSER=false
+LANGFLOW_LOG_LEVEL=info
+DO_NOT_TRACK=true
+LANGFLOW_REMOVE_API_KEYS=true
+LANGFLOW_FALLBACK_TO_ENV_VAR=false
+LANGFLOW_STORE_ENVIRONMENT_VARIABLES=false
+LANGFLOW_WORKERS=${LANGFLOW_WORKERS_DEFAULT}
+LANGFLOW_WORKER_TIMEOUT=300
+LANGFLOW_HEALTH_CHECK_MAX_RETRIES=5
+LANGFLOW_LAZY_LOAD_COMPONENTS=false
+EOF2
+chmod 600 /opt/langflow/.env
+{
+  echo "${APP_NAME} Credentials"
+  echo "Default Admin User: ${ADMIN_USER}"
+  echo "Username: ${ADMIN_USER}"
+  echo "Password: ${ADMIN_PASS}"
+  echo "Exposed Port: 7860"
+  echo "URL: http://${LOCAL_IP}:7860"
+} >~/langflow.creds
+chmod 600 ~/langflow.creds
+msg_ok "Configured Langflow"
+
+msg_info "Creating Service"
+cat <<'EOF2' >/etc/systemd/system/langflow.service
+[Unit]
+Description=Langflow Service
+After=network.target
+
+[Service]
+Type=simple
+WorkingDirectory=/opt/langflow
+EnvironmentFile=/opt/langflow/.env
+ExecStart=/opt/langflow/.venv/bin/langflow run --env-file /opt/langflow/.env --no-open-browser
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF2
+systemctl daemon-reload
+systemctl enable -q --now langflow
+msg_ok "Created Service"
+
+motd_ssh
+customize
+cleanup_lxc