LibreNMS polling stops when REDIS is enabled in .env

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1

Hi,

I get this error page when I enable redis in the .env for librenms. Following is the redis script that I have included. Polling stopped as soon as redis is included.

REDIS_HOST=10.28.132.61
REDIS_PORT=6379
REDIS_DB=0
CACHE_DRIVER=redis

(Attached is the screenshot of the web-gui error)

Following is the validate output from librenms.

[root@net-ksantosh ksantosh]# su - librenms
Last login: Tue Jul 20 12:09:16 IST 2021 on pts/0
-bash-4.2$ ./validate.php

Component Version
LibreNMS 21.7.0-8-ga45020c
DB Schema 2021_25_01_0127_create_isis_adjacencies_table (211)
PHP 7.3.29
Python 3.6.8
MySQL 10.4.20-MariaDB
RRDTool 1.4.8
SNMP NET-SNMP 5.7.2
====================================

[OK] Composer Version: 2.1.3
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct
[INFO] Detected Python Wrapper
[FAIL] We could not get memcached stats, it is possible that we cannot connect to your memcached server, please check
[WARN] Your local git contains modified files, this could prevent automatic updates.
[FIX]:
You can fix this with ./scripts/github-remove
Modified Files:
bootstrap/cache/.gitignore
logs/.gitignore
rrd/.gitignore
storage/app/.gitignore
storage/app/public/.gitignore
storage/debugbar/.gitignore
storage/framework/cache/.gitignore
storage/framework/cache/data/.gitignore
storage/framework/sessions/.gitignore
storage/framework/testing/.gitignore
storage/framework/views/.gitignore
storage/logs/.gitignore

librenms_error
librenms_error1117×401 12.6 KB

2

Did you check the logs like it says?

3

Yes Sir. I have taken a snippet of the logs like it said and it’s a lengthy notepad. I just don’t know how to upload it here.

I didn’t find anything significant there other than the messages that it has polled devices in so many seconds and one entry where it says that it has polled zero devices.

Thanks.

4

Please find a snippet of the logs here:

https://p.libren.ms/view/624db7c8

Thanks,
Santosh Kotla

5

[2021-07-20 23:09:28] production.ERROR: Permission denied [tcp://10.28.132.61:6379]

I’m guessing you have selinux enabled

6

I just went through the config procedure as for Centos and I see that there is section where SELinux is configured. I am using CentOS 7 but the one mentioned in the installation manual is for CentOS 8. Do you think this would pose a problem?

Could SELinux be an issue?

Thanks,

7

what does your redis.conf and .env look like? I didn’t set redis_db=0 in my .env file. I am running redis/rrdcached/galera on centos 7 with 4 pollers.

9

I haven’t changed anything in the redis.conf. Just commented the bind statement so that the tool uses all network ports.

Below is the snippet of the .env file.

[root@net-ksantosh ksantosh]# cat /opt/librenms/.env
APP_KEY=base64:bUA62mcsJbBD1cTVaXISeiJjqGyUx8kRI8VYpjNv5ek=

DB_HOST=localhost
DB_DATABASE=librenms
DB_USERNAME=librenms
DB_PASSWORD=librenms

#REDIS_HOST=10.28.132.61
#REDIS_PORT=6379
#REDIS_DB=0
#CACHE_DRIVER=redis

#APP_URL=
NODE_ID=60eebcb42118b
LIBRENMS_USER=librenms

Thanks.

P.S - I overlooked that CentOS 8 was mentioned in the install document and pushed for a CentOS 8 upgrade last night.

[root@net-ksantosh ksantosh]# cat /etc/centos-release
CentOS Linux release 8.4.2105

10

So 10.28.132.61 is the master or is it standalone. You can try this. X.X.X.X/32 will be the IP address of the redis client/replica/slave.

If you think it is selinux or firewalld, you can disable them and restart your httpd/nginx and redis service.

systemctl stop firewalld
setenforce 0

Or you can keep the firewall enabled and add a rule for it and also add policies for selinux.

systemctl start firewalld
firewall-cmd --permanent --zone=public --add-port=6379/tcp
firewall-cmd --permanent --zone=public --add-source=X.X.X.X/32

sudo firewall-cmd --reload
systemctl stop firewalld

semanage port -a -t redis_port_t -p tcp 6379

semanage permissive -a redis_t

setsebool -P httpd_can_network_connect=1

systemctl restart httpd
systemctl start firewalld

php -m | grep redis

12

Thanks for the detailed suggestion nms.

Do you suggest that I change the REDIS_HOST to 10.28.132.61/32?

I don’t think the SELinux is the culprit because this issue was happening even when SELinux was disabled. Firewall has been disabled as well, as this instance will be working only in a private environment.

Scenario::
I am testing this before I deploy a poller in our PROD environment. We have a Librenms instance that is taking care of about 1300 devices in a DC in Reno. At present we are maxing out on the resources for this instance and the polling of the devices are not completing. I am planning to deploy poller in APAC and EMEA so that the respective devices in those geographies can be offloaded to the poller of that region.

This test instance I deployed is supposed to be a mock central server and then I will deploy a poller that offloads specified devices from this mock central server.

I hope you got an idea of what I am trying to achieve.

13

I don’t how 10.28.132.61/32 relates to your environment. Do you have only a single librenms instance running right now?

14

Yes. This is the only instance that I have right now and I am trying to st this up as a mock central server. Once this comes up fine, I will configure pollers to offload some work from the mock central server.

Thanks,
Santosh Kotla

15

@nms / @Jellyfrog / @murrant

I have tried to deploy everything again on a Ubuntu Server and I still run into the same issue. Whenever I enable REDIS in the .env, the WEB GUI stops working and asks me to check the logs. But I see that the devices are being polled and the stats are getting collected in the background?

Could it be possible that NGINX doesn’t get along well with REDIS-SERVER? I have been stuck with this problem for over 2 weeks and I tried to google different forums but never came to a proper solution. Any help from your side would be highly appreciated.

Thanks,
Santosh Kotla

P.S - This is the latest LIBRENMS logs from the UBUNTU instance that I installed over a raspberry pi4 box.

[2021-08-05 14:36:02] production.ERROR: Connection refused [tcp://localhost:6379] {“exception”:"[object] (Predis\Connection\ConnectionException(code: 111): Connection refused [tcp://localhost:6379] at /opt/librenms/vendor/predis/predis/src/Connection/AbstractConnection.php:155)
[stacktrace]
#0 /opt/librenms/vendor/predis/predis/src/Connection/StreamConnection.php(128): Predis\Connection\AbstractConnection->onConnectionError()
#1 /opt/librenms/vendor/predis/predis/src/Connection/StreamConnection.php(178): Predis\Connection\StreamConnection->createStreamSocket()
#2 /opt/librenms/vendor/predis/predis/src/Connection/StreamConnection.php(100): Predis\Connection\StreamConnection->tcpStreamInitializer()
#3 /opt/librenms/vendor/predis/predis/src/Connection/AbstractConnection.php(81): Predis\Connection\StreamConnection->createResource()
#4 /opt/librenms/vendor/predis/predis/src/Connection/StreamConnection.php(258): Predis\Connection\AbstractConnection->connect()
#5 /opt/librenms/vendor/predis/predis/src/Connection/AbstractConnection.php(180): Predis\Connection\StreamConnection->connect()
#6 /opt/librenms/vendor/predis/predis/src/Connection/StreamConnection.php(288): Predis\Connection\AbstractConnection->getResource()
#7 /opt/librenms/vendor/predis/predis/src/Connection/StreamConnection.php(394): Predis\Connection\StreamConnection->write()
#8 /opt/librenms/vendor/predis/predis/src/Connection/AbstractConnection.php(110): Predis\Connection\StreamConnection->writeRequest()
#9 /opt/librenms/vendor/predis/predis/src/Client.php(331): Predis\Connection\AbstractConnection->executeCommand()
#10 /opt/librenms/vendor/predis/predis/src/Client.php(314): Predis\Client->executeCommand()
#11 /opt/librenms/vendor/laravel/framework/src/Illuminate/Redis/Connections/Connection.php(116): Predis\Client->__call()
#12 /opt/librenms/vendor/laravel/framework/src/Illuminate/Redis/Connections/Connection.php(220): Illuminate\Redis\Connections\Connection->command()
#13 /opt/librenms/vendor/laravel/framework/src/Illuminate/Cache/RedisLock.php(38): Illuminate\Redis\Connections\Connection->__call()
#14 /opt/librenms/vendor/laravel/framework/src/Illuminate/Cache/Lock.php(90): Illuminate\Cache\RedisLock->acquire()
#15 /opt/librenms/alerts.php(43): Illuminate\Cache\Lock->get()
#16 {main}
"}

16

You have configured a to use a redis server, and said server is not responding.

17

@Jellyfrog : Yes sir. I am trying to deploy REDIS so that I can make it talk to other pollers in the network. We are currently operating on a single instance of LibreNMS that is consuming humongous resources and it cant handle about 1300 devices on it’s own.

Earlier I thought that the server stopped polling but then I realized that it is somehow interfering with the Web GUI but the device polling and stats collection is happening in the background.

I have turned off the protected mode on the REDIS-SERVER conf and commented out the bind statement. It seems to have stopped blocking the web GUI from working and I see it working even when REDIS is mentioned in the .env file.

The same doesn’t seem to get along when I deployed it in the CentOS environment. This is the error log that I found on the CentOS deployment.

[previous exception] [object] (Predis\Connection\ConnectionException(code: 13): Permission denied [tcp://10.28.132.61:6379] at /opt/librenms/vendor/predis/predis/src/Connection/AbstractConnection.php:155)
[stacktrace]
#0 /opt/librenms/vendor/predis/predis/src/Connection/StreamConnection.php(128): Predis\Connection\AbstractConnection->onConnectionError(‘Permission deni…’, 13)
#1 /opt/librenms/vendor/predis/predis/src/Connection/StreamConnection.php(178): Predis\Connection\StreamConnection->createStreamSocket(Object(Predis\Connection\Parameters), ‘tcp://10.28.132…’, 4)
#2 /opt/librenms/vendor/predis/predis/src/Connection/StreamConnection.php(100): Predis\Connection\StreamConnection->tcpStreamInitializer(Object(Predis\Connection\Parameters))
#3 /opt/librenms/vendor/predis/predis/src/Connection/AbstractConnection.php(81): Predis\Connection\StreamConnection->createResource()
#4 /opt/librenms/vendor/predis/predis/src/Connection/StreamConnection.php(258): Predis\Connection\AbstractConnection->connect()
#5 /opt/librenms/vendor/predis/predis/src/Connection/AbstractConnection.php(180): Predis\Connection\StreamConnection->connect()
#6 /opt/librenms/vendor/predis/predis/src/Connection/StreamConnection.php(288): Predis\Connection\AbstractConnection->getResource()
\7 /opt/librenms/vendor/predis/predis/src/Connection/StreamConnection.php(394): Predis\Connection\StreamConnection->write(’*2
\3
\ET
$5…’)
#8 /opt/librenms/vendor/predis/predis/src/Connection/AbstractConnection.php(110): Predis\Connection\StreamConnection->writeRequest(Object(Predis\Command\StringGet))
#9 /opt/librenms/vendor/predis/predis/src/Client.php(331): Predis\Connection\AbstractConnection->executeCommand(Object(Predis\Command\StringGet))
#10 /opt/librenms/vendor/predis/predis/src/Client.php(314): Predis\Client->executeCommand(Object(Predis\Command\StringGet))
#11 /opt/librenms/vendor/laravel/framework/src/Illuminate/Redis/Connections/Connection.php(116): Predis\Client->__call(‘get’, Array)
#12 /opt/librenms/vendor/laravel/framework/src/Illuminate/Redis/Connections/Connection.php(220): Illuminate\Redis\Connections\Connection->command(‘get’, Array)
#13 /opt/librenms/vendor/laravel/framework/src/Illuminate/Cache/RedisStore.php(62): Illuminate\Redis\Connections\Connection->__call(‘get’, Array)
#14 /opt/librenms/vendor/laravel/framework/src/Illuminate/Cache/Repository.php(97): Illuminate\Cache\RedisStore->get(‘checks_popup_ti…’)
#15 /opt/librenms/vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php(418): Illuminate\Cache\Repository->get(‘checks_popup_ti…’)
#16 /opt/librenms/vendor/laravel/framework/src/Illuminate/Support/Facades/Facade.php(261): Illuminate\Cache\CacheManager->__call(‘get’, Array)
#17 /opt/librenms/app/Checks.php(43): Illuminate\Support\Facades\Facade::__callStatic(‘get’, Array)
#18 /opt/librenms/app/Http/ViewComposers/LayoutComposer.php(52): App\Checks::postAuth()
#19 /opt/librenms/vendor/laravel/framework/src/Illuminate/View/Concerns/ManagesEvents.php(124): App\Http\ViewComposers\LayoutComposer->compose(Object(Illuminate\View\View))
#20 /opt/librenms/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php(392): Illuminate\View\Factory->Illuminate\View\Concerns\{closure}(Object(Illuminate\View\View))
#21 /opt/librenms/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php(237): Illuminate\Events\Dispatcher->Illuminate\Events\{closure}(‘composing: layo…’, Array)
#22 /opt/librenms/vendor/laravel/framework/src/Illuminate/View/Concerns/ManagesEvents.php(177): Illuminate\Events\Dispatcher->dispatch(‘composing: layo…’, Array)
#23 /opt/librenms/vendor/laravel/framework/src/Illuminate/View/View.php(120): Illuminate\View\Factory->callComposer(Object(Illuminate\View\View))
#24 /opt/librenms/vendor/laravel/framework/src/Illuminate/View/View.php(91): Illuminate\View\View->renderContents()
#25 /opt/librenms/storage/framework/views/3a1e3c9b836cc6723962e6cc8198f744923dbfb0.php(11): Illuminate\View\View->render()
#26 /opt/librenms/vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php(107): require(’/opt/librenms/s…’)
#27 /opt/librenms/vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php(108): Illuminate\Filesystem\Filesystem::Illuminate\Filesystem\{closure}()
#28 /opt/librenms/vendor/laravel/framework/src/Illuminate/View/Engines/PhpEngine.php(58): Illuminate\Filesystem\Filesystem->getRequire(’/opt/librenms/s…’, Array)
#29 /opt/librenms/vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php(61): Illuminate\View\Engines\PhpEngine->evaluatePath(’/opt/librenms/s…’, Array)
#30 /opt/librenms/vendor/laravel/framework/src/Illuminate/View/View.php(139): Illuminate\View\Engines\CompilerEngine->get(’/opt/librenms/r…’, Array)
#31 /opt/librenms/vendor/laravel/framework/src/Illuminate/View/View.php(122): Illuminate\View\View->getContents()
#32 /opt/librenms/vendor/laravel/framework/src/Illuminate/View/View.php(91): Illuminate\View\View->renderContents()
#33 /opt/librenms/vendor/laravel/framework/src/Illuminate/Http/Response.php(69): Illuminate\View\View->render()
#34 /opt/librenms/vendor/laravel/framework/src/Illuminate/Http/Response.php(35): Illuminate\Http\Response->setContent(Object(Illuminate\View\View))
#35 /opt/librenms/vendor/laravel/framework/src/Illuminate/Routing/Router.php(793): Illuminate\Http\Response->__construct(Object(Illuminate\View\View), 200, Array)
#36 /opt/librenms/vendor/laravel/framework/src/Illuminate/Routing/Router.php(763): Illuminate\Routing\Router::toResponse(Object(Illuminate\Http\Request), Object(Illuminate\View\View))
#37 /opt/librenms/vendor/laravel/framework/src/Illuminate/Routing/Router.php(695): Illuminate\Routing\Router->prepareResponse(Object(Illuminate\Http\Request), Object(Illuminate\View\View))
#38 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(128): Illuminate\Routing\Router->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#39 /opt/librenms/app/Http/Middleware/RedirectIfAuthenticated.php(30): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#40 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): App\Http\Middleware\RedirectIfAuthenticated->handle(Object(Illuminate\Http\Request), Object(Closure))
#41 /opt/librenms/vendor/laravel/framework/src/Illuminate/Routing/Middleware/SubstituteBindings.php(50): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#42 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Routing\Middleware\SubstituteBindings->handle(Object(Illuminate\Http\Request), Object(Closure))
#43 /opt/librenms/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/VerifyCsrfToken.php(78): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#44 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Foundation\Http\Middleware\VerifyCsrfToken->handle(Object(Illuminate\Http\Request), Object(Closure))
#45 /opt/librenms/vendor/laravel/framework/src/Illuminate/View/Middleware/ShareErrorsFromSession.php(49): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#46 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\View\Middleware\ShareErrorsFromSession->handle(Object(Illuminate\Http\Request), Object(Closure))
#47 /opt/librenms/vendor/laravel/framework/src/Illuminate/Session/Middleware/StartSession.php(121): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#48 /opt/librenms/vendor/laravel/framework/src/Illuminate/Session/Middleware/StartSession.php(64): Illuminate\Session\Middleware\StartSession->handleStatefulRequest(Object(Illuminate\Http\Request), Object(Illuminate\Session\Store), Object(Closure))
#49 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Session\Middleware\StartSession->handle(Object(Illuminate\Http\Request), Object(Closure))
#50 /opt/librenms/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/AddQueuedCookiesToResponse.php(37): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#51 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse->handle(Object(Illuminate\Http\Request), Object(Closure))
#52 /opt/librenms/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/EncryptCookies.php(67): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#53 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Cookie\Middleware\EncryptCookies->handle(Object(Illuminate\Http\Request), Object(Closure))
#54 /opt/librenms/app/Http/Middleware/CheckInstalled.php(61): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#55 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): App\Http\Middleware\CheckInstalled->handle(Object(Illuminate\Http\Request), Object(Closure))
#56 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(103): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#57 /opt/librenms/vendor/laravel/framework/src/Illuminate/Routing/Router.php(697): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#58 /opt/librenms/vendor/laravel/framework/src/Illuminate/Routing/Router.php(672): Illuminate\Routing\Router->runRouteWithinStack(Object(Illuminate\Routing\Route), Object(Illuminate\Http\Request))
#59 /opt/librenms/vendor/laravel/framework/src/Illuminate/Routing/Router.php(636): Illuminate\Routing\Router->runRoute(Object(Illuminate\Http\Request), Object(Illuminate\Routing\Route))
#60 /opt/librenms/vendor/laravel/framework/src/Illuminate/Routing/Router.php(625): Illuminate\Routing\Router->dispatchToRoute(Object(Illuminate\Http\Request))
#61 /opt/librenms/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(166): Illuminate\Routing\Router->dispatch(Object(Illuminate\Http\Request))
#62 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(128): Illuminate\Foundation\Http\Kernel->Illuminate\Foundation\Http\{closure}(Object(Illuminate\Http\Request))
#63 /opt/librenms/vendor/genealabs/laravel-caffeine/src/Http/Middleware/LaravelCaffeineDripMiddleware.php(11): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#64 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): GeneaLabs\LaravelCaffeine\Http\Middleware\LaravelCaffeineDripMiddleware->handle(Object(Illuminate\Http\Request), Object(Closure))
#65 /opt/librenms/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#66 /opt/librenms/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ConvertEmptyStringsToNull.php(31): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle(Object(Illuminate\Http\Request), Object(Closure))
#67 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull->handle(Object(Illuminate\Http\Request), Object(Closure))
#68 /opt/librenms/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#69 /opt/librenms/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TrimStrings.php(40): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle(Object(Illuminate\Http\Request), Object(Closure))
#70 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Foundation\Http\Middleware\TrimStrings->handle(Object(Illuminate\Http\Request), Object(Closure))
#71 /opt/librenms/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ValidatePostSize.php(27): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#72 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Foundation\Http\Middleware\ValidatePostSize->handle(Object(Illuminate\Http\Request), Object(Closure))
#73 /opt/librenms/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/PreventRequestsDuringMaintenance.php(86): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#74 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Foundation\Http\Middleware\PreventRequestsDuringMaintenance->handle(Object(Illuminate\Http\Request), Object(Closure))
#75 /opt/librenms/vendor/fruitcake/laravel-cors/src/HandleCors.php(38): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#76 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Fruitcake\Cors\HandleCors->handle(Object(Illuminate\Http\Request), Object(Closure))
#77 /opt/librenms/vendor/fideloper/proxy/src/TrustProxies.php(57): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#78 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Fideloper\Proxy\TrustProxies->handle(Object(Illuminate\Http\Request), Object(Closure))
#79 /opt/librenms/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(103): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#80 /opt/librenms/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(141): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#81 /opt/librenms/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(110): Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter(Object(Illuminate\Http\Request))
#82 /opt/librenms/html/index.php(52): Illuminate\Foundation\Http\Kernel->handle(Object(Illuminate\Http\Request))
#83 {main}
"}

18

I’m guessing selinux blocks it then.
However it’s unrelated to librenms

19

@Jellyfrog

I just checked the selinux status on the system. It is disabled.

[root@net-santosh01 ksantosh]# cat /etc/selinux/config

This file controls the state of SELinux on the system.

SELINUX= can take one of these three values:

enforcing - SELinux security policy is enforced.

permissive - SELinux prints warnings instead of enforcing.

disabled - No SELinux policy is loaded.

SELINUX=disabled

SELINUXTYPE= can take one of three values:

targeted - Targeted processes are protected,

minimum - Modification of targeted policy. Only selected processes are protected.

mls - Multi Level Security protection.

SELINUXTYPE=targeted

20

Connection refused [tcp://localhost:6379] at /opt/librenms/vendor/predis/predis/src/Connection/AbstractConnection.php:155)

(Predis\Connection\ConnectionException(code: 13): Permission denied [tcp://10.28.132.61:6379] at /opt/librenms/vendor/predis/predis/src/Connection/AbstractConnection.php:155)

Connection refused would be firewall blocking or the service isn’t actually up and listening at 6379.

Permission denied would be selinux or user/group file permission from accessing the running service or required system files.

21

Hi @nms

I think this had to do something with the bind statement and the protection mode in the redis.conf. I went and commented the bind statement and turned the protection mode to ‘no’. That seemed to have done the trick.

Thanks,
Santosh Kotla

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