Bump version to 1.3.3

Replace statvfs with zpool list command for ZFS storage pools to get accurate
size and free space metrics. This resolves the 'mountpoint' key error for ZFS
pools and provides more accurate capacity information.

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Harikrishnan R
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

flake.lock

@@ -1,18 +1,13 @@
 {
   "nodes": {
     "debBundler": {
-      "inputs": {
-        "home-manager": "home-manager",
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
+      "flake": false,
       "locked": {
-        "lastModified": 1699154900,
-        "narHash": "sha256-y+PK9ToYcAyY86EoM7Iam7gC++rCuAGndlnPTEzd3EA=",
+        "lastModified": 1746317543,
+        "narHash": "sha256-1Xph5g1Lazzkc9XuY1nOkG5Fn7+lmSdldAC91boDawY=",
         "owner": "illustris",
         "repo": "flake",
-        "rev": "a56221a54571b0e4326af29cf75b4cec081b8de7",
+        "rev": "e86bd104d76d22b2ba36fede405e7bff290ef489",
         "type": "github"
       },
       "original": {
@@ -21,34 +16,13 @@
         "type": "github"
       }
     },
-    "home-manager": {
-      "inputs": {
-        "nixpkgs": [
-          "debBundler",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1699025595,
-        "narHash": "sha256-e+o4PoSu2Z6Ww8y/AVUmMU200rNZoRK+p2opQ7Db8Rg=",
-        "owner": "nix-community",
-        "repo": "home-manager",
-        "rev": "8765d4e38aa0be53cdeee26f7386173e6c65618d",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "home-manager",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1699099776,
-        "narHash": "sha256-X09iKJ27mGsGambGfkKzqvw5esP1L/Rf8H3u3fCqIiU=",
+        "lastModified": 1746663147,
+        "narHash": "sha256-Ua0drDHawlzNqJnclTJGf87dBmaO/tn7iZ+TCkTRpRc=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "85f1ba3e51676fa8cc604a3d863d729026a6b8eb",
+        "rev": "dda3dcd3fe03e991015e9a74b22d35950f264a54",
         "type": "github"
       },
       "original": {

flake.nix

@@ -5,7 +5,7 @@ rec {
 		nixpkgs.url = github:nixos/nixpkgs/nixos-unstable;
 		debBundler = {
 			url = github:illustris/flake;
-			inputs.nixpkgs.follows = "nixpkgs";
+			flake = false;
 		};
 	};
 
@@ -14,7 +14,7 @@ rec {
 		packages.x86_64-linux = with nixpkgs.legacyPackages.x86_64-linux; rec {
 			pvemon = python3Packages.buildPythonApplication {
 				pname = "pvemon";
-				version = "1.1.1";
+				version = "1.3.3";
 				src = ./src;
 				propagatedBuildInputs = with python3Packages; [
 					pexpect
@@ -28,7 +28,7 @@ rec {
 				};
 			};
 			default = pvemon;
-			deb = debBundler.bundlers.x86_64-linux.deb default;
+			deb = (import "${debBundler}/bundlers/deb" { inherit pkgs; }) default;
 			updateRelease = writeScriptBin "update-release" (builtins.readFile ./utils/update-release.sh);
 		};
 

src/pvecommon/__init__.py

@@ -30,11 +30,20 @@ def ttl_cache_with_randomness(max_ttl, randomness_factor):
             result = func(*args, **kwargs)
             cache[key] = (result, time.time())
             return result
+
+        def invalidate_cache(*args, **kwargs):
+            key = str(args) + str(kwargs)
+            if key in cache:
+                del cache[key]
+
+        # Attach the invalidation function to the wrapper
+        wrapper.invalidate_cache = invalidate_cache
+
         return wrapper
     return decorator
 
 @ttl_cache_with_randomness(qm_max_ttl, qm_rand)
-def qm_term_cmd(vm_id, cmd, timeout=global_qm_timeout):
+def qm_term_cmd(vm_id, cmd, timeout=global_qm_timeout): # TODO: ignore cmd timeout in cache key
     global deferred_closing
     child = pexpect.spawn(f'qm monitor {vm_id}')
     try:

src/pvemon/__init__.py

@@ -19,11 +19,22 @@ from concurrent.futures import ThreadPoolExecutor
 from threading import Lock
 
 import pvecommon
+import pvestorage
 import qmblock
 
+import builtins
+
+# Cache for pool data
+pool_cache = {
+    'last_mtime': 0,
+    'vm_pool_map': {},
+    'pools': {}
+}
+
 DEFAULT_PORT = 9116
 DEFAULT_INTERVAL = 10
 DEFAULT_PREFIX = "pve"
+DEFAULT_HOST = "0.0.0.0"
 
 gauge_settings = [
     ('kvm_cpu', 'CPU time for VM', ['id', 'mode']),
@@ -41,6 +52,8 @@ gauge_settings = [
     ('kvm_io_write_chars', 'Number of bytes written including buffers', ['id']),
 
     ('kvm_nic_queues', 'Number of queues in multiqueue config', ['id', 'ifname']),
+
+    ('kvm_disk_size', 'Size of virtual disk', ['id', 'disk_name']),
 ]
 
 label_flags = [ "-id", "-name", "-cpu" ]
@@ -51,13 +64,30 @@ info_settings = [
 
 flag_to_label_value = lambda args, match: next((args[i+1] for i, x in enumerate(args[:-1]) if x == match), "unknown").split(",")[0]
 
+def parse_mem(cmdline):
+    ret = flag_to_label_value(cmdline, "-m")
+    # lazy way to detect NUMA
+    # the token after -m might look something like 'size=1024,slots=255,maxmem=4194304M'
+    if ret.isnumeric():
+        return int(ret)*1024
+
+    # probably using NUMA
+    ret = 0
+    for arg in cmdline:
+        if "memory-backend-ram" in arg:
+            assert(arg[-1]=='M')
+            ret += 1024*int(arg.split("=")[-1][:-1])
+    return ret
+
 def create_or_get_gauge(metric_name, labels, dynamic_gauges, gauge_lock):
+    logging.debug(f"create_or_get_gauge({metric_name=}, labels={str(labels)}")
     with gauge_lock:
         if metric_name not in dynamic_gauges:
             dynamic_gauges[metric_name] = GaugeMetricFamily(f"{prefix}_{metric_name}", f'{metric_name} for KVM process', labels=labels)
     return dynamic_gauges[metric_name]
 
 def create_or_get_info(info_name, labels, dynamic_infos, info_lock):
+    logging.debug(f"create_or_get_info({info_name=}, labels={str(labels)}")
     with info_lock:
         if (info_name,str(labels)) not in dynamic_infos:
             dynamic_infos[(info_name,str(labels))] = InfoMetricFamily(f"{prefix}_{info_name}", f'{info_name} for {str(labels)}', labels=labels)
@@ -113,6 +143,67 @@ def read_interface_stats(ifname):
         pass
     return stats
 
+def get_pool_info():
+    """
+    Read pool information from /etc/pve/user.cfg, caching based on file modification time.
+    Returns a tuple of (vm_to_pool_map, pool_info) where:
+    - vm_to_pool_map maps VM IDs to their pool names
+    - pool_info contains details about each pool (levels, etc.)
+    """
+    pool_cfg_path = '/etc/pve/user.cfg'
+
+    try:
+        # Check modification time
+        current_mtime = os.path.getmtime(pool_cfg_path)
+
+        # If file hasn't changed, return cached data
+        if current_mtime <= pool_cache['last_mtime'] and pool_cache['vm_pool_map']:
+            return pool_cache['vm_pool_map'], pool_cache['pools']
+
+        # File has changed or first run, parse it
+        logging.debug(f"Reading pool configuration from {pool_cfg_path}")
+
+        vm_pool_map = {}
+        pools = {}
+
+        with open(pool_cfg_path, 'r') as f:
+            for line in f:
+                if line.startswith('pool:'):
+                    parts = line.strip().split(':')
+                    if len(parts) < 3:
+                        continue
+
+                    pool_name = parts[1]
+                    vm_list = parts[3] if len(parts) > 3 else ''
+
+                    # Store pool info
+                    pool_parts = pool_name.split('/')
+                    pool_level_count = len(pool_parts)
+
+                    pools[pool_name] = {
+                        'level_count': pool_level_count,
+                        'level1': pool_parts[0] if pool_level_count > 0 else '',
+                        'level2': pool_parts[1] if pool_level_count > 1 else '',
+                        'level3': pool_parts[2] if pool_level_count > 2 else ''
+                    }
+
+                    # Map VMs to this pool
+                    if vm_list:
+                        for vm_id in vm_list.split(','):
+                            if vm_id.strip():
+                                vm_pool_map[vm_id.strip()] = pool_name
+
+        # Update cache
+        pool_cache['last_mtime'] = current_mtime
+        pool_cache['vm_pool_map'] = vm_pool_map
+        pool_cache['pools'] = pools
+
+        return vm_pool_map, pools
+
+    except (FileNotFoundError, PermissionError) as e:
+        logging.warning(f"Could not read pool configuration: {e}")
+        return {}, {}
+
 def collect_kvm_metrics():
     logging.debug("collect_kvm_metrics() called")
     gauge_dict = {}
@@ -132,26 +223,55 @@ def collect_kvm_metrics():
     for proc in psutil.process_iter(['pid', 'name', 'exe', 'cmdline', 'cpu_percent', 'memory_percent', 'num_threads']):
         try:
             if proc.info['exe'] == '/usr/bin/qemu-system-x86_64':
+                vmid = flag_to_label_value(proc.info['cmdline'], "-id")
+                # Check if VM definition exists. If it is missing, qm commands will fail.
+                # VM configs are typically missing when a VM is migrating in.
+                # The config file is moved after the drives and memory are synced.
+                if not os.path.exists(f'/etc/pve/qemu-server/{vmid}.conf'):
+                    continue
                 procs.append(
                     (
                         proc,
                         proc.info['cmdline'],
-                        flag_to_label_value(proc.info['cmdline'], "-id")
+                        vmid
                     )
                 )
         except (psutil.NoSuchProcess, psutil.AccessDenied, psutil.ZombieProcess):
             continue
 
+    # Get VM to pool mapping
+    vm_pool_map, pools = get_pool_info()
+
     for proc, cmdline, id in procs:
         # Extract vm labels from cmdline
         info_label_dict = {get_label_name(l): flag_to_label_value(cmdline,l) for l in label_flags}
-        info_label_dict['pid']=str(proc.pid)
+        info_label_dict['pid'] = str(proc.pid)
         logging.debug(f"got PID: {proc.pid}")
+
+        # Add pool information if available
+        if id in vm_pool_map:
+            pool_name = vm_pool_map[id]
+            pool_info = pools[pool_name]
+
+            info_label_dict['pool'] = pool_name
+            info_label_dict['pool_levels'] = str(pool_info['level_count'])
+            info_label_dict['pool1'] = pool_info['level1']
+            info_label_dict['pool2'] = pool_info['level2']
+            info_label_dict['pool3'] = pool_info['level3']
+            logging.debug(f"VM {id} belongs to pool {pool_name}")
+        else:
+            # VM not in any pool
+            info_label_dict['pool'] = ''
+            info_label_dict['pool_levels'] = '0'
+            info_label_dict['pool1'] = ''
+            info_label_dict['pool2'] = ''
+            info_label_dict['pool3'] = ''
+
         info_dict["kvm"].add_metric([], info_label_dict)
 
         d = {
             "kvm_vcores": flag_to_label_value(cmdline,"-smp"),
-            "kvm_maxmem": int(flag_to_label_value(cmdline,"-m"))*1024,
+            "kvm_maxmem": parse_mem(cmdline),
             "kvm_memory_percent": proc.info['memory_percent'],
             "kvm_threads": proc.info['num_threads'],
         }
@@ -200,6 +320,11 @@ def collect_kvm_metrics():
                 disk_labels = {"id": id, "disk_name": disk_name}
                 prom_disk_info = create_or_get_info("kvm_disk", disk_labels.keys(), dynamic_infos, info_lock)
                 prom_disk_info.add_metric(disk_labels.values(), disk_info)
+                disk_size = qmblock.get_disk_size(disk_info["disk_path"], disk_info["disk_type"])
+                if disk_size == None and disk_info["disk_type"] != "qcow2":
+                    logging.debug(f"collect_kvm_metrics: failed to get disk size for {disk_info=}")
+                else:
+                    gauge_dict["kvm_disk_size"].add_metric([id, disk_name], qmblock.get_disk_size(disk_info["disk_path"], disk_info["disk_type"]))
 
         list(executor.map(map_netstat_proc, [ proc[2] for proc in procs ]))
         list(executor.map(map_disk_proc, [ proc[2] for proc in procs ]))
@@ -222,12 +347,17 @@ class PVECollector(object):
         if cli_args.collect_running_vms.lower() == 'true':
             for x in collect_kvm_metrics():
                 yield x
+        if cli_args.collect_storage.lower() == 'true':
+            for x in pvestorage.collect_storage_metrics():
+                yield x
 
 def main():
     parser = argparse.ArgumentParser(description='PVE metrics exporter for Prometheus')
     parser.add_argument('--port', type=int, default=DEFAULT_PORT, help='Port for the exporter to listen on')
+    parser.add_argument('--host', type=str, default=DEFAULT_HOST, help='Host address to bind the exporter to')
     parser.add_argument('--interval', type=int, default=DEFAULT_INTERVAL, help='THIS OPTION DOES NOTHING')
     parser.add_argument('--collect-running-vms', type=str, default='true', help='Enable or disable collecting running VMs metric (true/false)')
+    parser.add_argument('--collect-storage', type=str, default='true', help='Enable or disable collecting storage info (true/false)')
     parser.add_argument('--metrics-prefix', type=str, default=DEFAULT_PREFIX, help='<prefix>_ will be prepended to each metric name')
     parser.add_argument('--loglevel', type=str, default='INFO', help='Set log level (DEBUG, INFO, WARNING, ERROR, CRITICAL)')
     parser.add_argument('--profile', type=str, default='false', help='collect metrics once, and print profiling stats')
@@ -236,23 +366,22 @@ def main():
     parser.add_argument('--qm-rand', type=int, default=60, help='randomize qm monitor cache expiry')
     parser.add_argument('--qm-monitor-defer-close', type=str, default="true", help='defer and retry closing unresponsive qm monitor sessions')
 
-    args = parser.parse_args()
-    global cli_args
-    cli_args = args
+    # hack to access cli_args across modules
+    builtins.cli_args = parser.parse_args()
 
-    loglevel = getattr(logging, args.loglevel.upper(), None)
+    loglevel = getattr(logging, cli_args.loglevel.upper(), None)
     if not isinstance(loglevel, int):
-        raise ValueError(f'Invalid log level: {args.loglevel}')
+        raise ValueError(f'Invalid log level: {cli_args.loglevel}')
     logging.basicConfig(level=loglevel,format='%(asctime)s: %(message)s')
 
     global prefix
-    prefix = args.metrics_prefix
-    pvecommon.global_qm_timeout = args.qm_terminal_timeout
-    pvecommon.qm_max_ttl = args.qm_max_ttl
-    pvecommon.qm_rand = args.qm_rand
-    pvecommon.qm_monitor_defer_close = args.qm_monitor_defer_close
+    prefix = cli_args.metrics_prefix
+    pvecommon.global_qm_timeout = cli_args.qm_terminal_timeout
+    pvecommon.qm_max_ttl = cli_args.qm_max_ttl
+    pvecommon.qm_rand = cli_args.qm_rand
+    pvecommon.qm_monitor_defer_close = cli_args.qm_monitor_defer_close
 
-    if args.profile.lower() == 'true':
+    if cli_args.profile.lower() == 'true':
         profiler = cProfile.Profile()
         profiler.enable()
         collect_kvm_metrics()
@@ -261,7 +390,7 @@ def main():
         return
     else:
         REGISTRY.register(PVECollector())
-        start_http_server(args.port)
+        start_http_server(cli_args.port, addr=cli_args.host)
 
     while True:
         time.sleep(100)

src/pvestorage/__init__.py

@@ -0,0 +1,183 @@
+import os
+import re
+import logging
+import pprint
+
+from prometheus_client.core import InfoMetricFamily, GaugeMetricFamily, CounterMetricFamily, REGISTRY
+
+gauge_settings = [
+    ('node_storage_size', 'Size of the storage pool. This number is inaccurate for ZFS.', ['name', 'type']),
+    ('node_storage_free', 'Free space on the storage pool', ['name', 'type'])
+]
+
+info_settings = [
+    ('node_storage', 'information for each PVE storage'),
+]
+
+# Sanitize the key to match Prometheus label requirements
+# Replace any character that is not a letter, digit, or underscore with an underscore
+sanitize_key = lambda key: re.sub(r"[^a-zA-Z0-9_]", "_", key)
+
+_cached_storage_data = None
+_cached_mtime = None
+
+def parse_storage_cfg(file_path='/etc/pve/storage.cfg'):
+    logging.debug(f"parse_storage_cfg({file_path=}) called")
+    global _cached_storage_data, _cached_mtime
+
+    # Check if file exists
+    if not os.path.exists(file_path):
+        raise FileNotFoundError(f"The file {file_path} does not exist.")
+
+    # Get the file's modification time
+    current_mtime = os.path.getmtime(file_path)
+
+    # If the data is already cached and the file hasn't changed, return the cached data
+    if _cached_storage_data is not None and _cached_mtime == current_mtime:
+        logging.debug("parse_storage_cfg: returning cached data")
+        return _cached_storage_data
+
+    logging.debug("parse_storage_cfg: file modified, dropping cache")
+
+    # Initialize list to store storages
+    storage_list = []
+    current_storage = None
+
+    with open(file_path, 'r') as file:
+        for line in file:
+            line = line.strip()
+
+            if not line or line.startswith("#"):
+                # Ignore empty lines or comments
+                continue
+
+            if ":" in line:
+                # If we were processing a previous section, append it to the list
+                if current_storage:
+                    storage_list.append(current_storage)
+
+                # Start a new storage definition
+                section_type, section_name = line.split(":", 1)
+                current_storage = {
+                    'type': sanitize_key(section_type.strip()),  # Sanitize the section type
+                    'name': sanitize_key(section_name.strip()),  # Sanitize the section name
+                }
+            else:
+                # Parse key-value pairs within the current storage
+                if current_storage:
+                    parts = line.split(None, 1)
+                    key = parts[0].strip()
+                    sanitized_key = sanitize_key(key)
+                    if len(parts) > 1:
+                        # Regular key-value pair
+                        current_storage[sanitized_key] = parts[1].strip()
+                    else:
+                        # Key with no value, set it to True
+                        current_storage[sanitized_key] = True
+
+    # Append the last storage section to the list if any
+    if current_storage:
+        storage_list.append(current_storage)
+
+    # Update the cache
+    _cached_storage_data = storage_list
+    _cached_mtime = current_mtime
+
+    return storage_list
+
+def get_storage_size(storage):
+    try:
+        if storage["type"] == "zfspool":
+            if "pool" not in storage:
+                logging.debug(f"ZFS pool {storage['name']} has no pool name configured")
+                return None
+
+            # Extract the pool name (could be in format like rpool/data)
+            pool_name = storage["pool"].split("/")[0]
+
+            # Use zpool command to get accurate size information
+            import subprocess
+            try:
+                result = subprocess.run(
+                    ["zpool", "list", pool_name, "-p"],
+                    capture_output=True,
+                    text=True,
+                    check=True
+                )
+
+                # Parse the output
+                lines = result.stdout.strip().split("\n")
+                if len(lines) < 2:
+                    logging.warn(f"Unexpected zpool list output format for {pool_name}")
+                    return None
+
+                # Extract values from the second line (the data line)
+                values = lines[1].split()
+                if len(values) < 4:
+                    logging.warn(f"Insufficient data in zpool list output for {pool_name}")
+                    return None
+
+                # Values are: NAME SIZE ALLOC FREE ...
+                # We need the SIZE and FREE values (index 1 and 3)
+                total_size = int(values[1])
+                free_space = int(values[3])
+
+                return {
+                    "total": total_size,
+                    "free": free_space
+                }
+            except (subprocess.SubprocessError, ValueError, IndexError) as e:
+                logging.warn(f"Error running zpool list for {pool_name}: {e}")
+                return None
+
+        elif storage["type"] in ["dir", "nfs", "cephfs"]:
+            # For non-ZFS storage, use statvfs
+            path = storage["path"]
+            stats = os.statvfs(path)
+            total_size = stats.f_frsize * stats.f_blocks
+            free_space = stats.f_frsize * stats.f_bavail
+            return {
+                "total": total_size,
+                "free": free_space
+            }
+
+        # TODO: handle lvmthin
+        # could parse /etc/lvm/backup/<vg-name> to collect this data
+        # TODO: handle rbd
+
+    except Exception as e:
+        logging.warn(f"get_storage_size: unknown error, {storage=}, error: {e}")
+
+    # Return None if the case is not handled
+    return None
+
+def collect_storage_metrics():
+    logging.debug("collect_storage_metrics() called")
+    gauge_dict = {}
+    info_dict = {}
+    prefix = cli_args.metrics_prefix
+    for name, description, labels in gauge_settings:
+        gauge_dict[name] = GaugeMetricFamily(f"{prefix}_{name}", description, labels=labels)
+
+    for name, description in info_settings:
+        info_dict[name] = InfoMetricFamily(f"{prefix}_{name}", description)
+
+    storage_pools = parse_storage_cfg()
+    for storage in storage_pools:
+        # Convert any non-string values to strings for InfoMetricFamily
+        storage_info = {}
+        for key, value in storage.items():
+            storage_info[key] = str(value) if not isinstance(value, str) else value
+
+        info_dict["node_storage"].add_metric([], storage_info)
+        size = get_storage_size(storage)
+        if size != None:
+            gauge_dict["node_storage_size"].add_metric([storage["name"], storage["type"]], size["total"])
+            gauge_dict["node_storage_free"].add_metric([storage["name"], storage["type"]], size["free"])
+
+    for v in info_dict.values():
+        yield v
+    for v in gauge_dict.values():
+        yield v
+
+    logging.debug("collect_storage_metrics() return")

src/qmblock/__init__.py

@@ -2,9 +2,12 @@ import pexpect
 import re
 import os
 import json
+import stat
 
 import pvecommon
 
+extract_disk_info_max_retries = 1
+
 def get_device(disk_path):
     try:
         return os.readlink(disk_path).split('/')[-1]
@@ -26,7 +29,7 @@ def handle_json_path(path):
         raise ValueError('No host_device driver found or filename is missing')
     return filename
 
-def extract_disk_info_from_monitor(vm_id):
+def extract_disk_info_from_monitor(vm_id, retries = 0):
     raw_output = pvecommon.qm_term_cmd(vm_id, 'info block')
     disks_map = {}
     disks = [x.strip() for x in raw_output.split("drive-")[1:]]
@@ -64,6 +67,8 @@ def extract_disk_info_from_monitor(vm_id):
             disks_map[disk_name]["disk_type"] = "rbd"
             rbd_parts = disk_path.split('/')
             disks_map[disk_name]["cluster_id"] = rbd_parts[-3]
+            disks_map[disk_name]["pool"] = rbd_parts[-2]
+            # Keeping for backwards compatibility
             disks_map[disk_name]["pool_name"] = rbd_parts[-2]
             disks_map[disk_name]["vol_name"] = rbd_parts[-1]
             disks_map[disk_name]["device"] = get_device(disk_path)
@@ -73,6 +78,11 @@ def extract_disk_info_from_monitor(vm_id):
             disks_map[disk_name]["vg_name"] = vg_name
             disks_map[disk_name]["vol_name"] = vol_name
             disks_map[disk_name]["device"] = get_device(disk_path)
+        # At this point, if disks_map[disk_name]["device"] exists and is None, the cache might be stale
+        # Flush the cache for this VMID and try again
+        if "device" in disks_map[disk_name] and disks_map[disk_name]["device"] == None and retries < extract_disk_info_max_retries:
+            pvecommon.qm_term_cmd.invalidate_cache(vm_id, 'info block')
+            return extract_disk_info_from_monitor(vm_id, retries+1)
         for line in data[1:-1]:
             if "Attached to" in line:
                 attached_to = line.split(":")[-1].strip()
@@ -87,6 +97,24 @@ def extract_disk_info_from_monitor(vm_id):
                 disks_map[disk_name]["detect_zeroes"] = "on"
     return disks_map
 
+def get_disk_size(disk_path, disk_type):
+    if stat.S_ISBLK(os.stat(disk_path).st_mode):
+        disk_name = os.path.basename(os.path.realpath(disk_path))
+        size_file_path = f"/sys/block/{disk_name}/size"
+        sector_size_file_path = f"/sys/block/{disk_name}/queue/hw_sector_size"
+
+        with open(size_file_path, 'r') as f:
+            sectors = int(f.read().strip())
+
+            with open(sector_size_file_path, 'r') as sector_size_file:
+                sector_size = int(sector_size_file.read().strip())
+
+                size_in_bytes = sectors * sector_size
+    else:
+        size_in_bytes = os.path.getsize(disk_path)
+
+    return size_in_bytes
+
 if __name__ == "__main__":
     import json
     import sys

src/setup.py

@@ -2,7 +2,7 @@ from setuptools import setup, find_packages
 
 setup(
     name='pvemon',
-    version = "1.1.1",
+    version = "1.3.3",
     packages=find_packages(),
     entry_points={
         'console_scripts': [