Unable to view page - error 503

General
1

Hi,

I've a pihole image running on a rpi zero board for few months.
I noticed now that I cannot access the web page.
This' what I've done so far:

Expected Behaviour:

The web interface should be working.
Actual Behaviour:

When I access my pihole via its local URL I get the 503 - Service Not Available error message.

Debug Token:
n7ysdzr9fp

pihole -v
Pi-hole version is v4.4 (Latest: v4.4)
AdminLTE version is v4.3.3 (Latest: v4.3.3)
FTL version is v4.3.1 (Latest: v4.3.1)

In /var/log/lighttpd/error.log found:
2020-04-29 12:13:02: (gw_backend.c.335) child signalled: 11
2020-04-29 12:13:03: (gw_backend.c.476) unlink /var/run/lighttpd/php.socket-0 after connect failed: Connection refused

sudo update
sudo upgrade -y
sudo clean
pihole -r
Error: Unable to update package cache. Please try "apt-get update"

sudo apt-get update doesn't work anymore, cannot access the package file.

If I need to burn a new pihole image again, can I save all the data achived so far? If so, how?
TIA

2

Welcome to the Pi-hole community, ebolisa. :slight_smile:

Your debug log confirms your observation:

*** [ DIAGNOSING ]: Dashboard and block page
[✗] Block page X-Header: X-Header does not match or could not be retrieved.
HTTP/1.1 503 Service Not Available
Content-Type: text/html
Content-Length: 365
Date: Wed, 29 Apr 2020 10:33:39 GMT
Server: lighttpd/1.4.53

On first glance, this doesn't look like a direct Pi-hole issue.
Did you perhaps configure additional web content to be served by lighttpd?

Let's try to verifiy your lighttpd configuration.
Executed on your Pi-hole machine, what’s the output of:

lighttpd -t -f /etc/lighttpd/lighttpd.conf

Also take a look if restarting lighttpd provides some additional insights:

sudo service lighttpd restart

In case that fails, please provide the output for:

sudo systemctl status --full --no-pager lighttpd.service
3

Hi, Thank you for getting back to me.

The apt update command worked fine till I used pihole -r.

However, it's possible that few days ago I ran this command
sudo apt-get install avahi-daemon
but I'm not sure.

Here's what I get running the above commands:


lighttpd -t -f /etc/lighttpd/lighttpd.conf
Syntax OK

sudo service lighttpd restart
--no output --

sudo systemctl status --full --no-pager pihole-FTL.service
pihole-FTL.service - LSB: pihole-FTL daemon
   Loaded: loaded (/etc/init.d/pihole-FTL; generated)
   Active: active (exited) since Wed 2020-04-29 14:04:21 CEST; 1h 28min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 284 ExecStart=/etc/init.d/pihole-FTL start (code=exited, status=0/SUCCESS)

abr 29 14:04:01 rpizero systemd[1]: Starting LSB: pihole-FTL daemon...
abr 29 14:04:03 rpizero pihole-FTL[284]: Not running
abr 29 14:04:19 rpizero su[512]: (to pihole) root on none
abr 29 14:04:19 rpizero su[512]: pam_unix(su:session): session opened for user pihole by (uid=0)
abr 29 14:04:20 rpizero su[512]: pam_systemd(su:session): Failed to stat() runtime directory '/run/user/999': Cannot find file or directory
abr 29 14:04:20 rpizero su[512]: pam_systemd(su:session): Not setting $XDG_RUNTIME_DIR, as the directory is not in order.
abr 29 14:04:21 rpizero pihole-FTL[284]: FTL started!
abr 29 14:04:21 rpizero systemd[1]: Started LSB: pihole-FTL daemon.

EDIT:

I gained control over update/upgrade issuing the following commands:

sudo rm /var/lib/apt/lists/* -vf
sudo apt update
sudo apt upgrade

but I'm hesitating issuing pihole -r

4

lighttpd shows no irregularities for your system.

These are not official commands on a standard Raspbian.
If you're using some convenience scripts, check if they introduce your update error, e.g. by relating to wrong package names or locations.

I am still not convinced that your error is related to Pi-hole.

You didn't reply yet to one of my previous questions:

7

No, I did not reconfigured Lighttpd, I'd not know how.

8

Please load the following URL in a browser and post a screen capture of what you are seeing, including the URL. You can paste the screen snap directly into a reply here.

http://pi.hole/admin

10

http://my_local_ip/admin shows: 503 service not available.

Anyhow, I lost control of my SD card so I installed a new image and pihole.

For future use, can the DB file be recovered/backup?

11

The long term database is stored at /etc/pihole/pihole-FTL.db

12

This is what fixed it for me:
sudo apt install --reinstall php7.3-cgi php7.3-cli php7.3-common php7.3-intl php7.3-json php7.3-opcache php7.3-readline php7.3-sqlite3

13

Created an account to let you and others know this solved my problem. YOU'RE AMAZING! Thank you.

14

This did it for me!!! I'm so pleased as this took me hours to find. Thanks for contributing.