[6.8.3] Unnecessary overwriting of JSON-files in docker.img every 5 seconds

@Valerio found this out first, but never received an answer. Today I found it out, too. But this is present since 2019 (or even longer).

I would say it's a bug, as:

• it prevents HDD/SSD spindown/sleep (depending on the location of docker.img)
• it wears out the SSD in the long run (if docker.img is located here) - see this bug, too.
• it prevents reaching CPU's deep sleep states

What happens:

• /var/lib/docker/containers/*/hostconfig.json is updated every 5 seconds with the same content
• /var/lib/docker/containers/*/config.v2.json is updated every 5 seconds with the same content except of some timestamps (which shouldn't be part of a config file I think)

Which docker containers:

• verified are Plex (Original) and PiHole, but maybe this is a general behaviour

As an example the source of hostconfig.json which was updated yesterday 17280x times with the same content:

find /var/lib/docker/containers/40b4197fdea122178139e9571ae5f4040a2ef69449acf14e616010c7e293bb44 -ls -name hostconfig.json -exec cat {} \;
2678289      4 -rw-r--r--   1 root     root         1725 Oct  8 13:46 /var/lib/docker/containers/40b4197fdea122178139e9571ae5f4040a2ef69449acf14e616010c7e293bb44/hostconfig.json
{
   "Binds":[
      "/mnt/user/tv:/tv:ro",
      "/mnt/cache/appdata/Plex-Media-Server:/config:rw",
      "/mnt/cache/appdata/Plex-Transcode:/transcode:rw",
      "/mnt/user/movie:/movie:ro"
   ],
   "ContainerIDFile":"",
   "LogConfig":{
      "Type":"json-file",
      "Config":{
         "max-file":"1",
         "max-size":"50m"
      }
   },
   "NetworkMode":"host",
   "PortBindings":{
      
   },
   "RestartPolicy":{
      "Name":"no",
      "MaximumRetryCount":0
   },
   "AutoRemove":false,
   "VolumeDriver":"",
   "VolumesFrom":null,
   "CapAdd":null,
   "CapDrop":null,
   "Capabilities":null,
   "Dns":[
      
   ],
   "DnsOptions":[
      
   ],
   "DnsSearch":[
      
   ],
   "ExtraHosts":null,
   "GroupAdd":null,
   "IpcMode":"private",
   "Cgroup":"",
   "Links":null,
   "OomScoreAdj":0,
   "PidMode":"",
   "Privileged":false,
   "PublishAllPorts":false,
   "ReadonlyRootfs":false,
   "SecurityOpt":null,
   "UTSMode":"",
   "UsernsMode":"",
   "ShmSize":67108864,
   "Runtime":"runc",
   "ConsoleSize":[
      0,
      0
   ],
   "Isolation":"",
   "CpuShares":0,
   "Memory":0,
   "NanoCpus":0,
   "CgroupParent":"",
   "BlkioWeight":0,
   "BlkioWeightDevice":[
      
   ],
   "BlkioDeviceReadBps":null,
   "BlkioDeviceWriteBps":null,
   "BlkioDeviceReadIOps":null,
   "BlkioDeviceWriteIOps":null,
   "CpuPeriod":0,
   "CpuQuota":0,
   "CpuRealtimePeriod":0,
   "CpuRealtimeRuntime":0,
   "CpusetCpus":"",
   "CpusetMems":"",
   "Devices":[
      {
         "PathOnHost":"/dev/dri",
         "PathInContainer":"/dev/dri",
         "CgroupPermissions":"rwm"
      }
   ],
   "DeviceCgroupRules":null,
   "DeviceRequests":null,
   "KernelMemory":0,
   "KernelMemoryTCP":0,
   "MemoryReservation":0,
   "MemorySwap":0,
   "MemorySwappiness":null,
   "OomKillDisable":false,
   "PidsLimit":null,
   "Ulimits":null,
   "CpuCount":0,
   "CpuPercent":0,
   "IOMaximumIOps":0,
   "IOMaximumBandwidth":0,
   "MaskedPaths":[
      "/proc/asound",
      "/proc/acpi",
      "/proc/kcore",
      "/proc/keys",
      "/proc/latency_stats",
      "/proc/timer_list",
      "/proc/timer_stats",
      "/proc/sched_debug",
      "/proc/scsi",
      "/sys/firmware"
   ],
   "ReadonlyPaths":[
      "/proc/bus",
      "/proc/fs",
      "/proc/irq",
      "/proc/sys",
      "/proc/sysrq-trigger"
   ]
}