Fix SSH permissions: store known_hosts in persistent /data and disable pseudo-terminal warning

backend/remote.py

@@ -4,7 +4,7 @@ import shutil
 import time
 from pathlib import Path
 from typing import Dict, Any, List, Optional, Tuple
-from backend.config import load_settings, DEFAULT_KEY_FILE, DEFAULT_PUB_KEY_FILE
+from backend.config import load_settings, DEFAULT_KEY_FILE, DEFAULT_PUB_KEY_FILE, DATA_DIR
 
 def get_public_key() -> str:
     if DEFAULT_PUB_KEY_FILE.exists():
@@ -40,9 +40,12 @@ def build_ssh_prefix(settings: Optional[Dict[str, Any]] = None) -> List[str]:
     raw_key_path = settings.get("vps_ssh_key_path", str(DEFAULT_KEY_FILE))
     key_path = resolve_key_path(raw_key_path)
     password = settings.get("vps_ssh_password", "")
+    known_hosts = str(DATA_DIR / "known_hosts")
 
     ssh_opts = [
+        "-T",
         "-o", "StrictHostKeyChecking=accept-new",
+        "-o", f"UserKnownHostsFile={known_hosts}",
         "-o", "ConnectTimeout=8",
         "-o", "ServerAliveInterval=15",
         "-p", port
@@ -69,10 +72,12 @@ def build_scp_prefix(settings: Optional[Dict[str, Any]] = None) -> List[str]:
     raw_key_path = settings.get("vps_ssh_key_path", str(DEFAULT_KEY_FILE))
     key_path = resolve_key_path(raw_key_path)
     password = settings.get("vps_ssh_password", "")
+    known_hosts = str(DATA_DIR / "known_hosts")
 
     scp_opts = [
         "-P", port,
         "-o", "StrictHostKeyChecking=accept-new",
+        "-o", f"UserKnownHostsFile={known_hosts}",
         "-o", "ConnectTimeout=10"
     ]
 
@@ -99,79 +104,53 @@ async def run_remote_quick(cmd: str, settings: Optional[Dict[str, Any]] = None)
         stdout, stderr = await proc.communicate()
         return proc.returncode, stdout.decode('utf-8', errors='replace'), stderr.decode('utf-8', errors='replace')
     except Exception as e:
-        return -1, "", str(e)
+        return 1, "", str(e)
 
-async def test_vps_connection(custom_settings: Optional[Dict[str, Any]] = None) -> Dict[str, Any]:
+async def test_vps_connection(settings: Optional[Dict[str, Any]] = None) -> Dict[str, Any]:
-    s = custom_settings or load_settings()
+    if not settings:
-    host = s.get("vps_host", "").strip()
+        settings = load_settings()
+
+    host = settings.get("vps_host", "").strip()
     if not host:
-        return {
+        return {"success": False, "error": "No VPS host configured. Please provide IP or hostname."}
-            "success": False,
-            "connected": False,
-            "error": "No VPS Host / IP configured. Please specify the VPS address in Settings."
-        }
 
-    # Run comprehensive diagnostic script on remote VPS
+    # 1. Test basic SSH connectivity & gather OS summary
-    diag_script = """
+    cmd_ping = 'echo "PANGOLIN_PONG" && uname -srm && cat /etc/os-release 2>/dev/null | grep PRETTY_NAME | cut -d= -f2 | tr -d \'"\''
-echo "===PING_OK==="
+    code, stdout, stderr = await run_remote_quick(cmd_ping, settings)
-uname -n
-cat /etc/os-release | grep PRETTY_NAME | cut -d= -f2 | tr -d '"'
-uname -r
-uptime -p 2>/dev/null || uptime
-which docker >/dev/null 2>&1 && echo "DOCKER_FOUND" || echo "DOCKER_NOT_FOUND"
-docker ps >/dev/null 2>&1 && echo "DOCKER_RUNNING" || echo "DOCKER_STOPPED"
-"""
-    ret, stdout, stderr = await run_remote_quick(diag_script, s)
 
-    if ret != 0 or "===PING_OK===" not in stdout:
+    if code != 0:
-        err = stderr.strip() or "Connection failed. Please check Host, Port, and SSH credentials."
+        err_msg = stderr.strip() or "Connection timed out or failed."
-        if "Permission denied" in err:
+        if "Permission denied" in err_msg:
-            err = "Permission denied (SSH authentication failed). Please ensure your SSH public key or password is correct on the VPS."
+            err_msg += " (SSH Authentication failed. Check key in ~/.ssh/authorized_keys or password)"
-        elif "Connection timed out" in err or "No route to host" in err:
+        return {"success": False, "error": err_msg}
-            err = f"Could not reach {host}:{s.get('vps_port', 22)}. Verify firewall, IP address, and SSH port."
-        return {
-            "success": False,
-            "connected": False,
-            "error": err
-        }
 
-    lines = [line.strip() for line in stdout.splitlines() if line.strip()]
+    lines = stdout.strip().split("\n")
-    hostname = lines[1] if len(lines) > 1 else host
+    os_name = lines[2] if len(lines) > 2 else (lines[1] if len(lines) > 1 else "Linux")
-    os_name = lines[2] if len(lines) > 2 else "Linux"
+    kernel = lines[1] if len(lines) > 1 else ""
-    kernel = lines[3] if len(lines) > 3 else ""
-    uptime_str = lines[4] if len(lines) > 4 else ""
-    docker_found = "DOCKER_FOUND" in stdout
-    docker_running = "DOCKER_RUNNING" in stdout
 
-    # Check Pangolin path on VPS
+    # 2. Check Docker availability on VPS
-    p_dir = s.get("vps_pangolin_dir", "/opt/pangolin")
+    code_docker, stdout_docker, _ = await run_remote_quick('docker --version', settings)
-    p_script = f"""
+    docker_installed = (code_docker == 0)
-[ -d "{p_dir}" ] && echo "DIR_OK" || echo "DIR_MISSING"
+    docker_version = stdout_docker.strip() if docker_installed else "Not detected"
-[ -f "{p_dir}/docker-compose.yml" ] || [ -f "{p_dir}/compose.yaml" ] && echo "COMPOSE_OK" || echo "COMPOSE_MISSING"
-find "{p_dir}" -name "*.db" -o -name "*.sqlite" 2>/dev/null | head -n 1
-"""
-    _, p_out, _ = await run_remote_quick(p_script, s)
-    p_lines = [l.strip() for l in p_out.splitlines() if l.strip()]
 
-    dir_ok = "DIR_OK" in p_lines
+    # 3. Check Pangolin Directory
-    compose_ok = "COMPOSE_OK" in p_lines
+    pangolin_dir = settings.get("vps_pangolin_dir", "/opt/pangolin")
-    db_file = None
+    chk_dir_cmd = f'[ -d "{pangolin_dir}" ] && echo "DIR_EXISTS" || echo "DIR_MISSING"'
-    for l in p_lines:
+    _, stdout_dir, _ = await run_remote_quick(chk_dir_cmd, settings)
-        if l.endswith((".db", ".sqlite")):
+    pangolin_dir_found = "DIR_EXISTS" in stdout_dir
-            db_file = l
+
-            break
+    # 4. Check SQLite database status in Pangolin directory
+    chk_db_cmd = f'find "{pangolin_dir}" -name "*.db" -o -name "*.sqlite" 2>/dev/null'
+    _, stdout_db, _ = await run_remote_quick(chk_db_cmd, settings)
+    dbs_found = [p.strip() for p in stdout_db.strip().split("\n") if p.strip()]
 
     return {
         "success": True,
-        "connected": True,
+        "os_name": os_name,
-        "hostname": hostname,
-        "os": os_name,
         "kernel": kernel,
-        "uptime": uptime_str,
+        "docker_installed": docker_installed,
-        "docker_installed": docker_found,
+        "docker_version": docker_version,
-        "docker_running": docker_running,
+        "pangolin_dir_found": pangolin_dir_found,
-        "pangolin_dir_exists": dir_ok,
+        "sqlite_databases": dbs_found,
-        "compose_file_exists": compose_ok,
+        "message": "SSH Connection successful! Remote host is ready for backups and updates."
-        "database_file": db_file,
-        "message": f"Successfully connected to {hostname} ({host}) via SSH!"
     }

entrypoint.sh

@@ -5,7 +5,8 @@ set -e
 DATA_PATH="${DATA_DIR:-/data}"
 BACKUP_PATH="${BACKUP_DIR:-/backups}"
 
-mkdir -p "$DATA_PATH" "$BACKUP_PATH"
+mkdir -p "$DATA_PATH" "$BACKUP_PATH" "$DATA_PATH/.ssh"
+export HOME="$DATA_PATH"
 
 # Set secure permissions on SSH private key if it exists
 if [ -f "$DATA_PATH/id_ed25519" ]; then
@@ -22,9 +23,9 @@ if [ "$PUID" -ne 0 ] && [ "$PGID" -ne 0 ]; then
         groupadd -g "$PGID" pangolin 2>/dev/null || true
     fi
 
-    # Create or update user
+    # Create or update user with persistent home in DATA_PATH
     if ! getent passwd pangolin >/dev/null 2>&1; then
-        useradd -u "$PUID" -g "$PGID" -d /app -s /bin/bash pangolin 2>/dev/null || true
+        useradd -u "$PUID" -g "$PGID" -d "$DATA_PATH" -s /bin/bash pangolin 2>/dev/null || true
     fi
 
     # Ensure ownership of persistent data and backup volumes