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OL8: Failed to connect to bus: No such file or directory

Dude!Aug 15 2019 — edited Aug 17 2019

I just noticed the following under OL 8.0.

[vnc-cd4@localhost ~]$ systemctl --user daemon-reload

Failed to connect to bus: No such file or directory

It seems the problem is that I used "su - vnc-cd4" from the root account.

But using using runuser also doesn't work:

[root@localhost ~]# runuser -l vnc-cd4 -c "systemctl --user daemon-reload"

Failed to connect to bus: No such file or directory

When I login directly, it works:

$ ssh vnc-cd4@10.0.80.1

vnc-cd4@10.0.80.1's password:

[vnc-cd4@localhost ~]$ systemctl --user daemon-reload

[vnc-cd4@localhost ~]$

If I try su without the dash, the error is slightly different:

[root@localhost ~]# su vnc-cd4

[vnc-cd4@localhost root]$ systemctl --user daemon-reload

Failed to connect to bus: Permission denied

I'm currently looking at TigerVNC 1.9 released for EL 8 and the instructions outlined at:

/usr/lib/systemd/user/vncserver@.service

Any idea how to use systemctl --user coming from root?

I can run "loginctl enable-linger" specifying the user:

[root@localhost ~]# loginctl enable-linger vnc-cd4

But systemctl --user does not seem to accept a username.

Thanks.
This post has been answered by Dude! on Aug 17 2019
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Comments

Hariseshu-Oracle

Thank you for the article. I have a problem and need your help.

  1. I have set-up integrated oim-oam-omss topology successfully on Oracle Linux Server 6.5.
  2. Used Oracle Identity & Access Management 11g R2 PS3 (11.1.2.3).

Problem:

From within the Enterprise Manager console, when I try accessing "Administration" menu of "ohs1" server instance I get the following exception.


Failed to invoke operation load on MBean oracle.as.management.mbeans.register:type=component,name=ohs1,instance=ohs1,Location=AdminServer

Parsing error while loading MBeans.


I have tried all I could like,

  • ./opmnctl unregisterinstance
  • ./opmnctl redeploy
  • ./opmnctl registerinstance
  • ./opmnctl updatecomponentregistration
  • upgradenonj2eeapp.sh

but getting the same exception. I have re-installed the whole set-up but no use.

Can you please help. Thank you so much.

Hari

Ricardo Gutierrez-Oracle

Thank you for the article. I have a problem and need your help.

  1. I have set-up integrated oim-oam-omss topology successfully on Oracle Linux Server 6.5.
  2. Used Oracle Identity & Access Management 11g R2 PS3 (11.1.2.3).

Problem:

From within the Enterprise Manager console, when I try accessing "Administration" menu of "ohs1" server instance I get the following exception.


Failed to invoke operation load on MBean oracle.as.management.mbeans.register:type=component,name=ohs1,instance=ohs1,Location=AdminServer

Parsing error while loading MBeans.


I have tried all I could like,

  • ./opmnctl unregisterinstance
  • ./opmnctl redeploy
  • ./opmnctl registerinstance
  • ./opmnctl updatecomponentregistration
  • upgradenonj2eeapp.sh

but getting the same exception. I have re-installed the whole set-up but no use.

Can you please help. Thank you so much.

Hari

Hi Hari,

This seems to be an issue with the OHS configuration, try the following procedure:

  1. Create a new OHS instance, e.g.:
    /home/oracle/oim-oam-omss/config/instances/ohs1/bin/opmnctl createcomponent -componentType OHS -componentName ohs2
  2. Start the new instance
    /home/oracle/oim-oam-omss/config/instances/ohs1/bin/opmnctl startproc ias-component=ohs2
  3. Access the EM console and check if you can access the "Administration" menu for ohs2, if so then stop the new instance
    /home/oracle/oim-oam-omss/config/instances/ohs1/bin/opmnctl stopproc ias-component=ohs2
  4. Edit httpd.conf for ohs1 (make a backup first) and make sure this file is not missing any directive by comparing with httpd.conf for ohs2
    E.g. the following line could be missing:
    <IfModule mpm_worker_module>
    ...
    LoadModule cgid_module "${ORACLE_HOME}/ohs/modules/mod_cgid.so"
    </IfModule>
  5. After updating httpd.conf, proceed to re-start ohs1
    /home/oracle/oim-oam-omss/config/instances/ohs1/bin/opmnctl stopproc ias-component=ohs1
    /home/oracle/oim-oam-omss/config/instances/ohs1/bin/opmnctl startproc ias-component=ohs1
  6. Check now if you can access the "Administration" menu for ohs1, if so then proceed to delete the ohs2 instance
    /home/oracle/oim-oam-omss/config/instances/ohs1/bin/opmnctl deletecomponent -componentName ohs2

Regards,

Ricardo

Acerak

Thank you for the article.  I tried using the oracle fusion middleware guide, but it was less than helpful.  After many fits/starts, I stumbled across this document.  Was very helpful.

Hariseshu-Oracle

Hi Hari,

This seems to be an issue with the OHS configuration, try the following procedure:

  1. Create a new OHS instance, e.g.:
    /home/oracle/oim-oam-omss/config/instances/ohs1/bin/opmnctl createcomponent -componentType OHS -componentName ohs2
  2. Start the new instance
    /home/oracle/oim-oam-omss/config/instances/ohs1/bin/opmnctl startproc ias-component=ohs2
  3. Access the EM console and check if you can access the "Administration" menu for ohs2, if so then stop the new instance
    /home/oracle/oim-oam-omss/config/instances/ohs1/bin/opmnctl stopproc ias-component=ohs2
  4. Edit httpd.conf for ohs1 (make a backup first) and make sure this file is not missing any directive by comparing with httpd.conf for ohs2
    E.g. the following line could be missing:
    <IfModule mpm_worker_module>
    ...
    LoadModule cgid_module "${ORACLE_HOME}/ohs/modules/mod_cgid.so"
    </IfModule>
  5. After updating httpd.conf, proceed to re-start ohs1
    /home/oracle/oim-oam-omss/config/instances/ohs1/bin/opmnctl stopproc ias-component=ohs1
    /home/oracle/oim-oam-omss/config/instances/ohs1/bin/opmnctl startproc ias-component=ohs1
  6. Check now if you can access the "Administration" menu for ohs1, if so then proceed to delete the ohs2 instance
    /home/oracle/oim-oam-omss/config/instances/ohs1/bin/opmnctl deletecomponent -componentName ohs2

Regards,

Ricardo

Thank you Ricardo. Thank you so much for the response.

Premita Tajane

Thank you so much .Your article is just perfect to understand LCM for PS3

Hi.  I am interested in getting information regarding how OIM integrates with Robotic Process Automation (RPA), if it does at all, and what is that integration if it does?  Is there anything that is part of the OIM featureset that would make it a good companion for RPA?  Thanks.

Hi.  I am interested in getting information regarding how OIM integrates with Robotic Process Automation (RPA), if it does at all, and what is that integration if it does?  Is there anything that is part of the OIM featureset that would make it a good companion for RPA?  Thanks.

Hi there,

I'm not aware of RPA available for the IdM suite, perhaps a quick trip to the documentation could provide you with the info you are looking for.

user9196620

I think only Oracle would call something with 100+ manual steps automation.  Have you guys considered creating a docker or repo to deploy your suite?  The complicated part is configuring MDC and getting all of that to work together.  Being able to deploy and entire cluster in < 10 minutes would be really nice using openstack.  I imagine most companies big enough to buy OAM Suite will not just be installing on a single node but it is not trivial to do all of that work.

1 person found this helpful
Philipp Grigoryev

Found out that cleanup doesn't remove DB schemas and fails at preconfigure stage, even though I ran clean- and restore-

sgs123

Quite interesting and helpful. I am attempting something similar but with Only OIM-SOA, so let's see how it goes.

SrivalliMN-Oracle

Hi, Thank you for the article. Installed the IDM 11.1.2.3, Any idea how to configure the OAM so that oamconsole can be accessed by administration port after enabling DWAP. 

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Added on Aug 15 2019
#linux, #oracle-linux
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