Kernel panic while installing on Debian 10

[gonzague]

In raising this issue, I confirm the following: {please fill the checkboxes, e.g: [X]}

• I have read and understood the contributors guide.
• The issue I am reporting can be replicated.
• The issue I am reporting isn't a duplicate
  How familiar are you with the the source code relevant to this issue?:

2

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Expected behaviour:

Installation of Pi-Hole on a brand new Debian 10 VM

Actual behaviour:

Installation stops with the machine doing a kernel panic just after trying to install pihole-FTL
`+ url=https://github.com/pi-hole/ftl/releases/latest/download

• curl -sSL --fail https://github.com/pi-hole/ftl/releases/latest/download/pihole-FTL-linux-x86_64 -o pihole-FTL-linux-x86_64
• curl -sSL --fail https://github.com/pi-hole/ftl/releases/latest/download/pihole-FTL-linux-x86_64.sha1 -o pihole-FTL-linux-x86_64.sha1

Message from syslogd@antipub at Jun 16 14:51:38 ...
kernel:[ 340.380646] Kernel panic - not syncing: Fatal exception in interrupt`

Steps to reproduce:

Install a Debian 10 VM from the netinst ISO ( https://saimei.ftp.acc.umu.se/debian-cd/current/amd64/iso-cd/debian-10.4.0-amd64-netinst.iso ) on a VMWare ESXi 6.5 server
Launch the install of Pi-Hole using the command curl -sSL https://install.pi-hole.net 3 | sudo bash -x
Troubleshooting undertaken, and/or other relevant information:

I have restarted the VM and retried several times to install Pi-Hole, without success. I don't have specific settings. I tried the "Clone our repository and run" option as well

[gonzague]

I found the "culprit" if it is of interest, using the VMX3 Ethernet card on the VM = crash
Using the E1000e Ethernet card works

Now I'm getting different errors in the install process such as :

_main: line 1892: usermod: command not found
grep: /etc/pihole/setupVars.conf: No such file or directory_

and their friend main: line 1758: /opt/pihole/gravity.sh: No such file or directory

[dschaper]

usermod is a system utility that is needed. If it's missing from the netinst ISO then you'll need an image that has the basic utilities.

[gonzague]

hey @dschaper weirdly the netinst ISO is supposed to download these basic utilities as I ticked standard utilities when I installed it

and my system has this utility.. I just need to use sudo to be able to use it:

root@antipub:/home/gonzague# sudo usermod -a -G sudo user
usermod: user 'user' does not exist

root@antipub:/home/gonzague# usermod
bash: usermod: command not found

I ran the installer (without the verbose option) and it completes, I get the web interface but if I try to go to Query Log (for example) I get the following error:
An unknown error occured while loading the data. <br /> <b>Fatal error</b>: Uncaught Error: Call to undefined function json_encode() in /var/www/html/admin/api.php:139 Stack trace: #0 {main} thrown in <b>/var/www/html/admin/api.php</b> on line <b>139</b><br />

[dschaper]

It's not sudo that makes it work since you're already the root user. The root user path is not correct.

Try looking at the location of usermod with which usermod or where usermod and not the full path. Then check the path as the root user echo $PATH and you'll likely see it doesn't include usermod. Running sudo as you did creates a new session that likely does include the path, sudo echo $PATH to check.

We suggest you don't use the root user to install Pi-hole, issues like this will happen when you do that.

Call to undefined function json_encode()

The PHP JSON package didn't install.

[gonzague]

Thanks again. I removed using pihole uninstall and reinstalled... under another user than root ..

Same problem, with the web interface error. The system returns :
php7.3-json is already the newest version (7.3.14-1~deb10u1). php7.3-json set to manually installed.

I ran sudo phpenmod json but don't know why .. when I do ..
`php -m
[PHP Modules]
Core
date
filter
hash
libxml
openssl
pcntl
pcre
Reflection
session
sodium
SPL
standard
zlib

[Zend Modules]
`

... no trace of JSON.

Again on a fresh install of Debian 10 ; with nothing else installed.

[ctbfourone]

@gonzague Try checking your $PATH. On Debian 10.4, as root, my path was not inclusive enough. When I set it to export PATH=/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin:$PATH so that I got all the bin locations and whatever else it already had set, then installation worked just fine.

Probably also make sure that apache2 is stopped, if installed, or remove it if you don't plan to use it, since both it and lighttpd will try to bind to port 80.

[MichaIng]

It looks like multiple PHP versions are installed as other required modules are missing as well: xml, intl, sqlite3
Check:

php -v
dpkg -l | grep php

[yubiuser]

Does the issue still persist?