No data on icinga2-Dashboard

[Marco-Total]

we have recently installed the Icinga2 dashboard, unfortunately no information from Icinga2 is displayed after calling the page:

Steps to Reproduce (for bugs)

yum makecache
yum -y install epel-release
yum -y install rubygems rubygem-bundler ruby-devel openssl gcc-c++ make nodejs

cd /usr/share/
git clone https://github.com/mocdaniel/dashing-icinga2.git
cd dashing-icinga2

#API users added
nano /etc/icinga2/conf.d/api-users.conf

#Connection test with the previously created API user:
curl -k -s -u test:test 'https://localhost:5665/v1/status/IcingaApplication?pretty=1'
{
    "results": [
        {
            "name": "IcingaApplication",
            "perfdata": [],
            "status": {
                "icingaapplication": {
                    "app": {
                        "enable_event_handlers": true,
                        "enable_flapping": true,
                        "enable_host_checks": true,
                        "enable_notifications": true,
                        "enable_perfdata": true,
                        "enable_service_checks": true,
                        "environment": "",
                        "node_name": "server.domain.local",
                        "pid": 3328618.0,
                        "program_start": 1610462107.871337,
                        "version": "2.12.3"
                    }
                }
            }
        }
    ]

cp /usr/share/dashing-icinga2/config/icinga2.json /usr/share/dashing-icinga2/config/icinga2.local.json

service dashing-icinga2 restart

So far so good...
Unfortunately, no data is displayed when calling the Dashing page.

## Context
Content thin.log
tail -f /usr/share/dashing-icinga2/log/thin.log
192.168.1.10 - - [12/Jan/2021 16:10:00] "GET /events HTTP/1.1" 200 - 6.3616
First trying to read environment variables
Environment variables not found, falling back to configuration file config/icinga2.json
Detecting local config file '/usr/share/dashing-icinga2/config/icinga2.local.json'.
Using config file '/usr/share/dashing-icinga2/config/icinga2.local.json'.
Reading config{"icinga2"=>{"api"=>{"host"=>"localhost", "port"=>5665, "user"=>"test", "password"=>"test"}}, "icingaweb2"=>{"url"=>"http://localhost/icingaweb2"}, "dashboard"=>{"show_only_hard_state_problems"=>false, "timezone"=>"UTC"}}
First trying to read environment variables
Environment variables not found, falling back to configuration file config/icinga2.json
Detecting local config file '/usr/share/dashing-icinga2/config/icinga2.local.json'.
Using config file '/usr/share/dashing-icinga2/config/icinga2.local.json'.
Reading config{"icinga2"=>{"api"=>{"host"=>"localhost", "port"=>5665, "user"=>"test", "password"=>"test"}}, "icingaweb2"=>{"url"=>"http://localhost/icingaweb2"}, "dashboard"=>{"show_only_hard_state_problems"=>false, "timezone"=>"UTC"}}
First trying to read environment variables
Environment variables not found, falling back to configuration file config/icinga2.json
Detecting local config file '/usr/share/dashing-icinga2/config/icinga2.local.json'.
Using config file '/usr/share/dashing-icinga2/config/icinga2.local.json'.
Reading config{"icinga2"=>{"api"=>{"host"=>"localhost", "port"=>5665, "user"=>"test", "password"=>"test"}}, "icingaweb2"=>{"url"=>"http://localhost/icingaweb2"}, "dashboard"=>{"show_only_hard_state_problems"=>false, "timezone"=>"UTC"}}
First trying to read environment variables
Environment variables not found, falling back to configuration file config/icinga2.json
Detecting local config file '/usr/share/dashing-icinga2/config/icinga2.local.json'.
Using config file '/usr/share/dashing-icinga2/config/icinga2.local.json'.
Reading config{"icinga2"=>{"api"=>{"host"=>"localhost", "port"=>5665, "user"=>"test", "password"=>"test"}}, "icingaweb2"=>{"url"=>"http://localhost/icingaweb2"}, "dashboard"=>{"show_only_hard_state_problems"=>false, "timezone"=>"UTC"}}
192.168.1.10 - - [12/Jan/2021 16:10:00] "GET /icinga2 HTTP/1.1" 200 7187 0.0160
192.168.1.10 - - [12/Jan/2021 16:10:00] "GET /views/clock.html HTTP/1.1" 200 82 0.0009
192.168.1.10 - - [12/Jan/2021 16:10:00] "GET /views/list.html HTTP/1.1" 200 613 0.0025
192.168.1.10 - - [12/Jan/2021 16:10:00] "GET /views/meter.html HTTP/1.1" 200 375 0.0008
================================================================================
scheduler caught exception:
no implicit conversion of nil into String
/usr/share/dashing-icinga2/lib/icinga2.rb:662:in `+'
/usr/share/dashing-icinga2/lib/icinga2.rb:662:in `block in getProblemServices'
/usr/share/dashing-icinga2/lib/icinga2.rb:652:in `each'
/usr/share/dashing-icinga2/lib/icinga2.rb:652:in `getProblemServices'
/usr/share/dashing-icinga2/lib/icinga2.rb:854:in `run'
/usr/share/dashing-icinga2/jobs/icinga2.rb:27:in `block in <top (required)>'
/usr/share/gems/gems/rufus-scheduler-2.0.24/lib/rufus/sc/jobs.rb:230:in `trigger_block'
/usr/share/gems/gems/rufus-scheduler-2.0.24/lib/rufus/sc/jobs.rb:204:in `block in trigger'
/usr/share/gems/gems/rufus-scheduler-2.0.24/lib/rufus/sc/scheduler.rb:430:in `block in trigger_job'
================================================================================

Content icinga2.log:
[2021-01-12 16:12:27 +0100] information/ApiListener: New client connection from [127.0.0.1]:42504 (no client certificate)
[2021-01-12 16:12:27 +0100] information/HttpServerConnection: Request: GET /v1/status/IcingaApplication (from [127.0.0.1]:42504), user: dashing, agent: rest-client/2.1.0 (linux-gnu x86_64) ruby/2.5.5p157, status: OK).
[2021-01-12 16:12:27 +0100] information/HttpServerConnection: HTTP client disconnected (from [127.0.0.1]:42504)
[2021-01-12 16:12:27 +0100] information/ApiListener: New client connection from [127.0.0.1]:42508 (no client certificate)
[2021-01-12 16:12:27 +0100] information/HttpServerConnection: Request: GET /v1/status/CIB (from [127.0.0.1]:42508), user: dashing, agent: rest-client/2.1.0 (linux-gnu x86_64) ruby/2.5.5p157, status: OK).
[2021-01-12 16:12:27 +0100] information/HttpServerConnection: HTTP client disconnected (from [127.0.0.1]:42508)
[2021-01-12 16:12:27 +0100] information/ApiListener: New client connection from [127.0.0.1]:42512 (no client certificate)
[2021-01-12 16:12:27 +0100] information/HttpServerConnection: Request: GET /v1/objects/hosts (from [127.0.0.1]:42512), user: dashing, agent: rest-client/2.1.0 (linux-gnu x86_64) ruby/2.5.5p157, status: OK).
[2021-01-12 16:12:27 +0100] information/HttpServerConnection: HTTP client disconnected (from [127.0.0.1]:42512)
[2021-01-12 16:12:27 +0100] information/ApiListener: New client connection from [127.0.0.1]:42516 (no client certificate)
[2021-01-12 16:12:27 +0100] information/HttpServerConnection: Request: GET /v1/objects/services (from [127.0.0.1]:42516), user: dashing, agent: rest-client/2.1.0 (linux-gnu x86_64) ruby/2.5.5p157, status: OK).
[2021-01-12 16:12:27 +0100] information/HttpServerConnection: HTTP client disconnected (from [127.0.0.1]:42516)

Your Environment

• Dashing version (gem list --local dashing): dashing (1.3.7)
• Ruby version (ruby -V): ruby 2.5.5p157 (2019-03-15 revision 67260) [x86_64-linux]
• Version of this project (tarball name, tag name or git show -1): commit d7fd55d (HEAD -> master, origin/master, origin/HEAD)
• Modifications to this project, if any (git diff):
• Operating System and version: CentOS 8
• Client browser and version: Chrome / Firefox

From our point of view, the access from the dashboard to the Icinga2 API is working (see HTTP 200), does anyone have a tip for us on how to fix it?

Thanks a lot for the help!!!

Greetings Rudi

[mocdaniel]

Hi Rudi,

thank you for providing so much information already. I reproduced your issue and it looks like v3.1.0 broke something I did not notice before. I will have to look into the matter further, until then you can try using v3.0.0 by cloning the tag:

git clone --depth 1 --branch v3.0.0 https://github.com/mocdaniel/dashing-icinga2.git

v3.0.0 worked just fine on 'your' setup for me.

I will report back in this thread once I sorted out the issues with v3.1.0

[mocdaniel]

Hi again, I pushed some minor changes to master which seem to fix the issues, apparently some functions became deprecated at some point, I don't use Ruby all too much outside of this repository.

It would be nice if you could confirm that the changes work for you so I can close this issue :)

Best,
Daniel

[Marco-Total]

Hi Daniel,

thanks for the quick feedback! With the current version the access works again without problems. Also in the LOG now no errors are displayed.

Thanks again!

[mocdaniel]

Great, glad we could fix your issue that quickly!