Computer is miraculous!
Note: Haven't got chance to test this.
sfdisk -d /dev/sdX > part_table
sfdisk /dev/sdY < part_tableThis will keeping the same disk & partition IDs, mainly for backup and restore partition purpose.
grep -v ^label-id part_table | sed -e 's/, *uuid=[0-9A-F-]*//' | sfdisk /dev/sdYHow to copy the partition layout of a whole disk using standard tools
I'm trying to manage my docker containers using container orchestration platform. There are a few of them can be used.
Easy to setup and manage existing docker machines.
Widely used.
K3s is Rancher’s k3s Kubernetes distro, lightweight, single binary, and low resource usage.
Complex
Unlike company environments, most of my docker containers applications have individual database. The application usage is low, autoscaling isn't a requirement for me but the backup and restore is important.
k8s vs k3s
Docker Swarm vs Kubernetes: how to choose a container orchestration tool
As mentioned in memorystock.com, Synology DS2419+ can use Dual Rank Memory (16GB DDR4 PC4-19200 2400MHz SODIMM NON-ECC Unbuffered 260pin 1.2V CL15 Dual Rank MemoryStock Part# 977ms-977). But my last upgrade failed using Dual Rank memory, only Single Rank works.
Some people mentioned that Synology NAS can use 32GB RAM, but some people said it will cause data corruption if exceed max supported memory. I just upgraded my DS1812+ more than officially supported memory size, hope it will be ok.
Synology 64GB DDR4 Unofficial Memory Upgrade Test for DiskStation NAS
Synology NAS Unofficial Memory Upgrade Guide
Memory Upgrade for Synology DiskStation DS2419+ Computer
For me, memorizing is a big issue, especially for logicless items. If it is anti-logic environment, I would make many mistakes which causes huge headache.
Numbering in Synology NAS is an issue for me, I got one volume2 but in storage pool 1, the volume1 is in storage pool 2. Normally, my thinking is simple, all packages are installed in volume1 and all iSCSI LUN created in volume1 as well, because I got SSD cache for volume1.
But above configuration confused me when ever received notification, I need to think about which volume got issue because the notification mentioned storage pool instead.
Today, thinking about change storage pool name again, because I know it is a setting hold by Synology, not Linux OS. Then I got answer.
Luckily I got issue with my DSM6, not DSM7, because they said that this can not be done in DSM7.
# synospace --meta -e
[/dev/vg1/volume_1]
---------------------
Descriptions=[]
Reuse Space ID=[]
[/dev/vg1]
---------------------
Descriptions=[]
Reuse Space ID=[reuse_2]Above result shows device /dev/vg1 is numbered as Storage Pool 2
To set storage pool number for specific device, use following command
# synospace --meta -s -i reuse_{storage_pool_number} {device_name}Note: This one, I haven't tested. But if it works, then I might want to try to shink volume next time
Stop all docker containers, etc., then stop all services using following command
syno_poweroff_task -dlist LV
lvm lvscanrename LV
lvm lvrename {VG name} {old LV name} {new LV name}Reboot
rebootShared folders and iSCSI services should be automatically modified and checking all you services are running correctly.
Renaming/renumbering storage pools and volumes
Synology Rename Volume and Storage Pool
The set command can be used to set/display the options in shell.
-e or -o errexitExit immediately if previous command returned a non-zero status.
-x or set -o xtracePrint trace.
-v or set -o verbosePrint line.
-o viUse a vi-style line editing interface.
-o emacsUse a emacs line editing interface.
Today, made a mistake, unplugged wrong disk in DS2419+, and caused it hang. At that time, I was moving 3 shared folders as well.
After hard reboot, everything back to orginal, I'm quite suprise, this is the second time I unplugged wrong disk in Synology NAS. Quite happy with this product, only one issue for me, they can not handle disk with bad sector well.
Proxmox is a KVM hypervisor and Linux Containers (LXC), thinking using it replace TrueNAS. But after research, found that it can not use thin disk, this is a big issue for me to save disk space.
TrueNAS still got some better points compare with Proxmox VE, such as the storage management, TrueNAS ZFS management looks more fesible than Proxmox can do. But Proxmox has some other points, such as support multiple hosts, more complex networking, file based VM image. TrueNAS uses ZFS volume to manage VM image, which creates many snapshots, hope the TrueNAS can have lesser bugs, especially on ZFS snapshots.
In the end, I think I will still use TrueNAs, I need ZFS pool feature to avoid disk issue.
Recently, upgrade iMac memory from 4GB each to 8GB. Officially this 2011 iMac only supports 4GB each, but 8GB memory can be installed.
It can also install mixed memory size and mixed speed. I also installed the memory which supported both 1.3v and 1.5v.
As the Synology DS1812+ NAS officially only supports 3GB RAM, I used 3GB RAM NAS for many years.
Recently, I got one 1Rx8 4GB DDR3 RAM, wanted to try to see whether DS1812+ can use it.
After installed, luckily it is working. Plus 1GB on board memory, it has about 5GB memory now.
root@ds1812:~# free
total used free shared buff/cache available
Mem: 5072432 901144 323456 15908 3847832 3761546
Swap: 5140404 460920 4679484
root@ds1812:~# cat /proc/meminfo
MemTotal: 5072432 kB
MemFree: 890332 kB
Buffers: 6104 kB
Cached: 3018256 kB
SwapCached: 29084 kB
Active: 662768 kB
Inactive: 2548468 kB
Active(anon): 94080 kB
Inactive(anon): 108664 kB
Active(file): 568688 kB
Inactive(file): 2439804 kB
Unevictable: 5804 kB
Mlocked: 5804 kB
SwapTotal: 5140404 kB
SwapFree: 4675032 kB
Dirty: 18444 kB
Writeback: 3860 kB
AnonPages: 188544 kB
Mapped: 76504 kB
Shmem: 15376 kB
Slab: 261456 kB
SReclaimable: 63788 kB
SUnreclaim: 197668 kB
KernelStack: 14400 kB
PageTables: 69604 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 7676620 kB
Committed_AS: 4152632 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 478460 kB
VmallocChunk: 34359221580 kB
DirectMap4k: 16876 kB
DirectMap2M: 5214208 kB
root@ds1812:~# To save time on reviewing comment in WordPress, I decided to implement ReCatpcha in WordPress.
Download Advanced noCaptcha & invisible Captcha plugin, because it supports many forms, including Contact Form 7 which I'm using currently.
Get Google reCAPTCHA keys and configure them into two fields in settings of plugin.
recaptcha.net as Recaptcha DomainNote: I chose V3.
Result will be a smal box at right bottom corner on each page.
In Contact Form 7 plugin configuration, click on the form which used and add following statement.
[anr_nocaptcha g-recaptcha-response]There is an issue after turned on.
The contact form has one empty non-editable box, very annoying.
How to get Google reCAPTCHA keys?
Adding any type of CAPTCHA check to Contact Form 7 forms
Contact Form 7 ReCaptcha SPAM Issues