Tag: replace

Replace Contents in NGINX

Replace Contents in NGINX

The content of a webpage contains URL or other information need to be replaced, especially when domain name changed in URL.


Use sub_filter module in NGINX to replace content.

For example,

server {
    location / {
        sub_filter 'www.example.com' 'www.xx.example.com';
        sub_filter_once on;

        proxy_pass  http://www.example.com;
        proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
        proxy_redirect off;
        proxy_buffering off;
        proxy_set_header        Host            $host;
        proxy_set_header        X-Real-IP       $remote_addr;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;

Note: Place sub_filter at beginning of the location session

If required, also need to change host to allow server decide which page requested if it is also a NGINX server and displays page depending on the host as well.

proxy_set_header        Host            www.example.com;


Module ngx_http_sub_module
http_sub_module / sub_filter of nginx and reverse proxy not working

Error replace hard disk in zpool in TrueNAS

Error replace hard disk in zpool in TrueNAS

Got following error when trying to replace hard disk in zpool. Reboot is required.

middlewared.service_exception.CallError: [EFAULT] Partition type 6a898cc3-1dd2-11b2-99a6-080020736631 not found on sda

Partition exists

First issue with the partition which exists in the old hard disk. Use fdisk to remove all partitions. But still could not replace.

Use force option

Then click on force check box, the replacing was started, but stopped at 15%. Tried many times, but still failed. Search google, people got same issue, but they said sudden worked.

Run partprob

Run partprob, error shows the kernel didn't know the new partition table, reboot is required.

Check partition after reboot

After reboot, checked partition table, found TrueNAS had updated partition as others, which has one 2GB swap. Then force replace hard disk in pool again, then worked


This is TrueNAS bug, which didn't close devices in kernel before repartition hard disk, this caused partition is opened and could not reread the new partition table into kernel.




Cant create Pool on TrueNAS Scale (it does work on TrueNAS Core under same Hardware)
Cant create Pool on TrueNas Scale