# 500 Error on new install RHEL 8

**URL:** <https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887>\
**Category:** Get Help\
**Tags:** question\
**Created:** [January 26, 2022, 8:29pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887 "2022-01-26T20:29:46Z")\
**Posts on this page:** 16\
**Page:** 1

<div class="post-metadata">

**Author:** ![equiros-sfwmd](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/equiros-sfwmd/32/979_2.png) [@equiros-sfwmd](https://discourse.openondemand.org/u/equiros-sfwmd)\
**Post date:** [January 26, 2022, 8:29pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/1 "2022-01-26T20:29:46Z")

</div>

I just installed Open Ondemand from RPM on a RHEL 8.5 system.  
After starting the web daemon, I get a 500 - internal server error.  
I followed the instructions on the doc site. What am I missing ?

---

<div class="post-metadata">

**Author:** ![equiros-sfwmd](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/equiros-sfwmd/32/979_2.png) [@equiros-sfwmd](https://discourse.openondemand.org/u/equiros-sfwmd)\
**Post date:** [January 26, 2022, 8:47pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/2 "2022-01-26T20:47:26Z")

</div>

I suspect it has something to do with mapping an initial default user. Some other discord articles describe that. Where is the user map located?

SELinux and local firewall is disabled. This is just a test system before I install on the production server.

---

<div class="post-metadata">

**Author:** ![equiros-sfwmd](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/equiros-sfwmd/32/979_2.png) [@equiros-sfwmd](https://discourse.openondemand.org/u/equiros-sfwmd)\
**Post date:** [January 27, 2022, 12:23pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/3 "2022-01-27T12:23:38Z")

</div>

Sorry about the Noob question. These are the steps I’ve taken for installation.

1. installed and updated a fresh RHEL 8.5 system
2. added the OSC repo to my package manager
3. enabled the ruby and nodejs modules
4. installed ondemand with the dependencies
5. verified that SELinux and local firewall is OFF
6. started httpd daemon
7. verified that apache is running
8. get 500 - Internal Server Error on web page

What step(s) am I missing on a simple test installation?

---

<div class="post-metadata">

**Author:** ![travert](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/travert/32/3074_2.png) [@travert](https://discourse.openondemand.org/u/travert)\
**Post date:** [January 27, 2022, 3:30pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/4 "2022-01-27T15:30:59Z")

</div>

Hello and welcome!

The installation instructions can be found here: [Installation — Open OnDemand 2.0.20 documentation](https://osc.github.io/ood-documentation/latest/installation.html)

Are those the instructions you were following for the RPM install?

After the install, did you also follow the starting services page here: [4. Start Services — Open OnDemand 2.0.20 documentation](https://osc.github.io/ood-documentation/latest/installation/start-apache.html)

Steps that may have been missed could be caught reading through those again, I’m just not sure what could be wrong with the previous info so far is all.

Also, you mentioned the user mapping in a previous post, and so maybe this doc would help as well: [2. Setup User Mapping — Open OnDemand 2.0.20 documentation](https://osc.github.io/ood-documentation/latest/authentication/overview/map-user.html?highlight=user%20maps)

Let me know if any of those help you clear up any missing steps, and if not we can dig deeper and see what’s goign on.

---

<div class="post-metadata">

**Author:** ![equiros-sfwmd](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/equiros-sfwmd/32/979_2.png) [@equiros-sfwmd](https://discourse.openondemand.org/u/equiros-sfwmd)\
**Post date:** [January 27, 2022, 3:51pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/5 "2022-01-27T15:51:35Z")

</div>

Hello, and Thanks ! 😀  
Yes, those were the instructions I have been using. I am installing on a test system before I deploy to the login node. Just wanted to work out some of the issues and give it a good look.

So, my checklist of steps in a previous post seem to follow the instructions pretty closely. I was expecting to see a generic login page, since no user has logged in yet, there should be no PUNs.

I’m sure I overlooked something apparently important, since I get the 500 error. I just don’t see what could be missing. Would you recommend a different OS ? RHEL 7 perhaps ?

---

<div class="post-metadata">

**Author:** ![travert](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/travert/32/3074_2.png) [@travert](https://discourse.openondemand.org/u/travert)\
**Post date:** [January 27, 2022, 4:17pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/6 "2022-01-27T16:17:31Z")

</div>

Hmm, yeah that’s strange. Have you tried firing a VM up and walking through again to check? It does seem like a step was missed somewhere from the error.

Are you seeing anything in the internal server logs?

You could try a build on RHEL 7 if you are fine with doing that and have the time, though I’d like to know what happened with the 8 install as well.

---

<div class="post-metadata">

**Author:** ![equiros-sfwmd](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/equiros-sfwmd/32/979_2.png) [@equiros-sfwmd](https://discourse.openondemand.org/u/equiros-sfwmd)\
**Post date:** [January 27, 2022, 7:09pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/7 "2022-01-27T19:09:06Z")

</div>

Okay, I went through all the steps again. **Sorry for the lengthy post.**  
What could I be missing here ?  
Do I need to make any changes in a conf file?

**Basic RHEL 8.5 install - fully updated**

[root@whqpod01p ~]# cat /etc/redhat-release  
Red Hat Enterprise Linux release 8.5 (Ootpa)

**1. Standard repos enabled**

±---------------------------------------------------------+  
Repositories in /etc/yum.repos.d/redhat.repo  
±---------------------------------------------------------+  
Repo ID: codeready-builder-for-rhel-8-x86\_64-rpms  
Repo Name: Red Hat CodeReady Linux Builder for RHEL 8 x86\_64 (RPMs)

Repo ID: rhel-8-for-x86\_64-supplementary-rpms  
Repo Name: Red Hat Enterprise Linux 8 for x86\_64 - Supplementary (RPMs)

Repo ID: rhel-8-for-x86\_64-appstream-rpms  
Repo Name: Red Hat Enterprise Linux 8 for x86\_64 - AppStream (RPMs)

Repo ID: SFWMD\_EPEL\_EPEL\_8  
Repo Name: EPEL 8

Repo ID: rhel-8-for-x86\_64-baseos-rpms  
Repo Name: Red Hat Enterprise Linux 8 for x86\_64 - BaseOS (RPMs)

**2. Add OSC Repo**

yum install [https://yum.osc.edu/ondemand/2.0/ondemand-release-web-2.0-1.noarch.rpm](https://yum.osc.edu/ondemand/2.0/ondemand-release-web-2.0-1.noarch.rpm)

**3. Enable Ruby and Nodejs module streams**

dnf module enable ruby:2.7  
dnf module enable nodejs:12

**4. Install ondemand package & dependencies**

yum install ondemand

**5. Verify web service status**

[root@whqpod01p ~]# service httpd status  
Redirecting to /bin/systemctl status httpd.service  
● httpd.service - The Apache HTTP Server  
Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disabled)  
Drop-In: /etc/systemd/system/httpd.service.d  
└─ood-portal.conf, ood.conf  
Active: inactive (dead)  
Docs: man:httpd.service(8)

No need to modify system security, since firewall and SELinux are off

**6. Start Web daemons**

systemctl start httpd  
systemctl enable httpd

**7. Verify web service status again**

[root@whqpod01p ~]# service httpd status  
Redirecting to /bin/systemctl status httpd.service  
● httpd.service - The Apache HTTP Server  
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)  
Drop-In: /etc/systemd/system/httpd.service.d  
└─ood-portal.conf, ood.conf  
Active: active (running) since Thu 2022-01-27 13:31:29 EST; 41s ago  
Docs: man:httpd.service(8)  
Main PID: 12300 (httpd)  
Status: “Running, listening on: port 443, port 80”  
Tasks: 213 (limit: 23671)  
Memory: 30.5M  
CGroup: /system.slice/httpd.service  
├─12300 /usr/sbin/httpd -DFOREGROUND  
├─12302 /usr/sbin/httpd -DFOREGROUND  
├─12303 /usr/sbin/httpd -DFOREGROUND  
├─12304 /usr/sbin/httpd -DFOREGROUND  
└─12305 /usr/sbin/httpd -DFOREGROUND

Jan 27 13:31:29 whqpod01p systemd[1]: Starting The Apache HTTP Server…  
Jan 27 13:31:29 whqpod01p update\_ood\_portal[12285]: No change in Apache config.  
Jan 27 13:31:29 whqpod01p systemd[1]: Started The Apache HTTP Server.  
Jan 27 13:31:29 whqpod01p httpd[12300]: Server configured, listening on: port 443, port 80

**8. Check web page**

500 - Internal Server Error  
🫤

---

<div class="post-metadata">

**Author:** ![travert](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/travert/32/3074_2.png) [@travert](https://discourse.openondemand.org/u/travert)\
**Post date:** [January 27, 2022, 8:22pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/8 "2022-01-27T20:22:20Z")

</div>

What did you do for you authentication? Did you use the Dex OIDC package with the `ood` user or have a default user on the system before the login?

---

<div class="post-metadata">

**Author:** ![equiros-sfwmd](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/equiros-sfwmd/32/979_2.png) [@equiros-sfwmd](https://discourse.openondemand.org/u/equiros-sfwmd)\
**Post date:** [January 27, 2022, 8:28pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/9 "2022-01-27T20:28:02Z")

</div>

We are working on RedHat IdM (ldap & krb5), but that’s not ready yet.  
I was just using local accounts so far. I’ve been looking at the http logs

Error.log says _AuthType openid-connect configured without corresponding module_

I was assuming that httpd runs as the apache user, which I see was added when it was installed.  
I was hoping to examine OOD more fully, but can’t seem to get it off the ground.  
Isn’t there an “out of the box” configuration for testing ?

---

<div class="post-metadata">

**Author:** ![travert](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/travert/32/3074_2.png) [@travert](https://discourse.openondemand.org/u/travert)\
**Post date:** [January 27, 2022, 8:52pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/10 "2022-01-27T20:52:56Z")

</div>

Did you include the `sudo yum install ondemand-dex` when working through the steps? If so, did you also issue the `sudo systemctl start ondemand-dex` and `sudo systemctl enable ondemand-dex` commands after the setup?

I just went through a VM with CentOS8 and had it running so maybe that’s the issue, though it’s not an exact RedHat replication it’s pretty close. I also skipped SELinux, turned off the firewall, and just went with the simple dex setup with that local `ood` user.

There is also the option of using the docker container if that’s something you are comfortable with. The instructions for that option are here: [ondemand/DEVELOPMENT.md at master · OSC/ondemand · GitHub](https://github.com/OSC/ondemand/blob/master/DEVELOPMENT.md)

---

<div class="post-metadata">

**Author:** ![equiros-sfwmd](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/equiros-sfwmd/32/979_2.png) [@equiros-sfwmd](https://discourse.openondemand.org/u/equiros-sfwmd)\
**Post date:** [January 28, 2022, 12:18pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/11 "2022-01-28T12:18:36Z")

</div>

Good Morning Travis.  
The instructions list that as optional.  
Apparently, that was the missing piece.

Okay, after installing ondemand-dex, and restarting apache and the ondemand-dex services, I see a login screen. I added the ood user and group, but I cannot login. Sorry about all the questions, I am new to this software. How do I login ?

---

<div class="post-metadata">

**Author:** ![equiros-sfwmd](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/equiros-sfwmd/32/979_2.png) [@equiros-sfwmd](https://discourse.openondemand.org/u/equiros-sfwmd)\
**Post date:** [January 28, 2022, 1:12pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/12 "2022-01-28T13:12:17Z")

</div>

Hello,  
Okay, reading the instructions further, I see that ood@localhost is the default user.  
Thanks for your help. I will continue to evaluate the product. Thanks again !  
😀

---

<div class="post-metadata">

**Author:** ![travert](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/travert/32/3074_2.png) [@travert](https://discourse.openondemand.org/u/travert)\
**Post date:** [January 28, 2022, 6:13pm UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/13 "2022-01-28T18:13:26Z")

</div>

Glad it worked out!

We are currently working on a documentation update and reorganization and I agree that step is a bit confusing the way it’s worded as it says optional then after gives a note as to how this option is needed if you just want to do some exploration, which is not a good sequence of explanation.

I’ve created an issue in the docs to capture this here: [Improve readibility of Install Instructions · Issue #629 · OSC/ood-documentation · GitHub](https://github.com/OSC/ood-documentation/issues/629)

---

<div class="post-metadata">

**Author:** ![emily.dragowsky](https://avatars.discourse-cdn.com/v4/letter/e/c68b51/32.png) [@emily.dragowsky](https://discourse.openondemand.org/u/emily.dragowsky)\
**Post date:** [January 29, 2022, 12:07am UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/14 "2022-01-29T00:07:28Z")

</div>

Greetings – I have experienced the same issue, having skipped the optional Dex install, and pausing in 4.4 (Start Services) to browse to ‘ondemand’ to verify status.

So is the bottom line that Dex is necessary? Reading forward to the LDAP implementation, the guide suggests that Dex would in fact be installed, as it calls for:

> step 1: Add LDAP configurations to to Dex, refer to [Configuring OnDemand Dex for LDAP](https://osc.github.io/ood-documentation/release-2.0/authentication/dex.html#dex-ldap).

I have not installed since doing so with 1.0.3, and did not recall working with Dex previously. Am happy to incorporate that now.

ps Cheers to equiros-sfwmd for posting about this experience.

---

<div class="post-metadata">

**Author:** ![emily.dragowsky](https://avatars.discourse-cdn.com/v4/letter/e/c68b51/32.png) [@emily.dragowsky](https://discourse.openondemand.org/u/emily.dragowsky)\
**Post date:** [January 29, 2022, 12:21am UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/15 "2022-01-29T00:21:53Z")

</div>

Sorry for the whiplash – since we are implementing CAS through mod\_auth\_cas, which requires source build under RHEL 8, I’m jumping past dex. Step one under apache authentication specifies using apxs and apr under a directory not installed after installing ondemand via dnf:

/opt/rh/httpd24/root/usr/bin

Is this an indication that I have an incomplete install?  
Have a good weekend!

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex015/uploads/osc/original/2X/b/bae70bd0ed39a3ae769c2108155f4cb3e9da8385.png) [@system](https://discourse.openondemand.org/u/system)\
**Post date:** [July 28, 2022, 12:22am UTC](https://discourse.openondemand.org/t/500-error-on-new-install-rhel-8/1887/16 "2022-07-28T00:22:49Z")

</div>

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.