March 21, 20251 yr I get the message "Docker Service failed to start." I have attached the logs but they do not seem to provide much insight into what is happening. Or I don't know what to look for. any direction where to look next would be greatly appreciated. I am happy to provide other information! Mar 20 23:41:05 CarterHub rc.samba: Samba server daemon... Started. Mar 20 23:41:07 CarterHub emhttpd: shcmd (67): /etc/rc.d/rc.avahidaemon reload Mar 20 23:41:07 CarterHub avahi-daemon[4781]: Got SIGHUP, reloading. Mar 20 23:41:09 CarterHub emhttpd: shcmd (77): /usr/local/sbin/mount_image '/mnt/user/system/docker/docker.img' /var/lib/docker 80 Mar 20 23:41:17 CarterHub kernel: loop2: detected capacity change from 0 to 209715200 Mar 20 23:41:17 CarterHub kernel: BTRFS: device fsid adf524f8-bb9c-48a4-b126-9c5075e11973 devid 1 transid 172714 /dev/loop2 scanned by udevd (6296) Mar 20 23:41:17 CarterHub kernel: BTRFS info (device loop2): first mount of filesystem adf524f8-bb9c-48a4-b126-9c5075e11973 Mar 20 23:41:17 CarterHub kernel: BTRFS info (device loop2): using crc32c (crc32c-intel) checksum algorithm Mar 20 23:41:17 CarterHub kernel: BTRFS info (device loop2): using free space tree Mar 20 23:41:17 CarterHub kernel: BTRFS info (device loop2): enabling ssd optimizations Mar 20 23:41:17 CarterHub kernel: BTRFS info (device loop2): auto enabling async discard Mar 20 23:41:17 CarterHub root: Resize device id 1 (/dev/loop2) from 100.00GiB to max Mar 20 23:41:17 CarterHub rc.nginx: Updating Nginx server daemon... Mar 20 23:41:18 CarterHub rc.nginx: Reloading Nginx server daemon... Mar 20 23:41:18 CarterHub emhttpd: shcmd (79): /etc/rc.d/rc.docker start Mar 20 23:41:18 CarterHub rc.docker: Starting Docker daemon... Mar 20 23:41:19 CarterHub rc.nginx: Checking configuration for correct syntax and then trying to open files referenced in configuration... Mar 20 23:41:19 CarterHub rc.nginx: /usr/sbin/nginx -t -c /etc/nginx/nginx.conf Mar 20 23:41:19 CarterHub rc.nginx: Reloading Nginx server daemon configuration... Mar 20 23:41:19 CarterHub nginx: 2025/03/20 23:41:19 [alert] 5319#5319: *121 open socket #30 left in connection 15 Mar 20 23:41:19 CarterHub nginx: 2025/03/20 23:41:19 [alert] 5319#5319: *110 open socket #31 left in connection 18 Mar 20 23:41:19 CarterHub nginx: 2025/03/20 23:41:19 [alert] 5319#5319: aborting Mar 20 23:41:25 CarterHub rc.samba: Updating Samba server daemon... Mar 20 23:41:25 CarterHub rc.samba: Restarting Samba server daemon... Mar 20 23:41:25 CarterHub rc.samba: Stopping Samba server daemon... Mar 20 23:41:26 CarterHub rc.samba: killall --ns 6563 smbd nmbd wsdd2 winbindd Mar 20 23:41:26 CarterHub wsdd2[5817]: 'Terminated' signal received. Mar 20 23:41:26 CarterHub winbindd[5841]: [2025/03/20 23:41:26.789372, 0, traceid=1] ../../source3/winbindd/winbindd_dual.c:1980(winbindd_sig_term_handler) Mar 20 23:41:26 CarterHub winbindd[5841]: Got sig[15] terminate (is_parent=1) Mar 20 23:41:26 CarterHub wsdd2[5817]: terminating. Mar 20 23:41:29 CarterHub rc.samba: Samba server daemon... Stopped. Mar 20 23:41:29 CarterHub rc.samba: Starting Samba server daemon... Mar 20 23:41:30 CarterHub rc.samba: /usr/sbin/smbd -D Mar 20 23:41:31 CarterHub rc.samba: /usr/sbin/wsdd2 -d -4 -6 Mar 20 23:41:33 CarterHub wsdd2[6836]: starting. Mar 20 23:41:33 CarterHub rc.samba: /usr/sbin/winbindd -D Mar 20 23:41:34 CarterHub rc.samba: Samba server daemon... Started. Mar 20 23:42:38 CarterHub rc.docker: Docker daemon... Failed. Mar 20 23:42:38 CarterHub rc.docker: Starting network... Mar 20 23:42:39 CarterHub rc.docker: Starting containers... Mar 20 23:42:40 CarterHub emhttpd: shcmd (81): umount /var/lib/docker Mar 20 23:42:40 CarterHub kernel: BTRFS info (device loop2): last unmount of filesystem adf524f8-bb9c-48a4-b126-9c5075e11973 Mar 20 23:42:41 CarterHub emhttpd: nothing to sync Mar 20 23:42:58 CarterHub sysDrivers: SysDrivers Build Complete
March 22, 20251 yr Author Here is a second diagnostics. If I disable and enable docker a few times, it will eventually work. The first diagnostics is on start up, the second is after docker finally starts.carterhub-diagnostics-20250321-2118.zip My CPU usage is also much higher. Even with docker disabled and no VMs, I'm still bouncing around 15-40% (with individual cores hitting 80-100) which seems odd. Disk speed is also way down. when transferring files, before I would get around 100 MB/s now I am getting around 13 MB/s.
March 22, 20251 yr Community Expert Nothing obvious logged, just: Mar 21 20:42:47 CarterHub rc.docker: Docker daemon... Failed. Try recreating the docker image, maybe it helps, and it won't hurt: https://docs.unraid.net/unraid-os/manual/docker-management/#re-create-the-docker-image-file Then: https://docs.unraid.net/unraid-os/manual/docker-management/#re-installing-docker-applications Also see below if you have any custom docker networks: https://docs.unraid.net/unraid-os/manual/docker-management/#docker-custom-networks
March 23, 20251 yr Author I think docker failing is a symptom of a deeper issue. I had htop up and saw "lsof -Fn" spiking the CPU. In this scenario my Array is stopped, no docker, and no VMs. Every 5 seconds, the command "lsof -Fn" hits the CPU for around 50%-102% CPU.
March 23, 20251 yr Community Expert 14 hours ago, Kantros said: I think docker failing is a symptom of a deeper issue. You don't actually mention if you followed the advice in the previous post about recreating docker.img. Did you?
March 30, 20251 yr Author First of all, thank you so much for the help everyone! Okay I was able to go in an delete the vdisk. That did not resolve anything so I also erased the cache pool. I am still seeing extremely slow performance on decently powerful hardware. for example, I am transferring my appdata backup to the cache and it is saying it will take a full day. docker images take 10-30 minutes to fully install mainly hanging on the extracting phase (the download is quick) . However, when doing a write test in the terminal, the speeds are sufficiently fast. anyone have ideas? Not sure what else I could try but I am open to anything. carterhub-diagnostics-20250329-2043.zip Edited March 30, 20251 yr by Kantros
March 30, 20251 yr Author Solution I have resolved this. I saw a "power mode" section in the settings. Change power mode to "Best Performance" -> Everything was fixed. I'm not sure if maybe 7.0.1 introduced something that could effect power modes but I'm happy to be up and running again. Made my machine (which is a repurposed laptop. maybe this is related?) go from an unable craw to faster than ever.
March 30, 20251 yr Community Expert According to your diagnostics, appdata has some of its files on the array, and system share has all its files on the array. Ideally, these and domains share would have all files on cache or other pool, with no files on the array, so Docker/VM performance is not impacted by slower array reads and especially writes, and so array disks can spin down since these files are always open. Nothing can move open files. Disable Docker in Settings. Set appdata and system shares to Primary:cache; Secondary:array; Move action:array->cache Then run mover, wait for it to complete, and post new diagnostics.
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