adds support for persistent device names in diskstat

fixes https://ideas.checkmk.com/suggestions/463217/use-persistent-device-name-for-single-disk-disk-io-checks

agents/check_mk_agent.linux

@@ -829,6 +829,10 @@ section_diskstat() {
             echo '[vx_dsk]'
             stat -c "%t %T %n" /dev/vx/dsk/*/*
         fi
+        if [ -d /dev/disk/by-id ]; then
+            echo '[disk_id]'
+            ls -l /dev/disk/by-id/* | awk '{print $9 " " $11 ;}'
+        fi
     else
         echo "<<<docker_container_diskstat${CGROUP_SECTION_SUFFIX}>>>"
         echo "[time]"

cmk/base/plugins/agent_based/diskstat.py

@@ -139,6 +139,9 @@ def parse_diskstat(string_table: type_defs.StringTable) -> diskstat.Section:
         if major != "None" and minor != "None" and (int(major), int(minor)) in name_info:
             device = name_info[(int(major), int(minor))]
 
+        if device in name_info:
+            device = name_info[device]
+
         # There are 1000 ticks per second
         disks[device] = {
             "timestamp": timestamp,
@@ -234,6 +237,8 @@ def diskstat_extract_name_info(
             phase = "dmsetup_info"
         elif line[0] == "[vx_dsk]":
             phase = "vx_dsk"
+        elif line[0] == "[disk_id]":
+            phase = "disk_id"
         else:
             if phase == "info":
                 if len(line) == 1:
@@ -256,6 +261,11 @@ def diskstat_extract_name_info(
                 group, disk = line[2].split("/")[-2:]
                 name = f"VxVM {group}-{disk}"
                 name_info[major, minor] = name
+            elif phase == "disk_id":
+                if line[0].startswith('/dev/disk/by-id/ata-') or line[0].startswith('/dev/disk/by-id/scsi-') or line[0].startswith('/dev/disk/by-id/nvme-'):
+                    disk = line[1][6:]
+                    name = '/'.join(line[0].split('/')[4:])
+                    name_info[disk] = name
     return timestamp, info_plain, name_info