I try to install mattermost on my Server (ProLiant MicroServer Gen8, VmWare Esxi 6.0; Ubuntu 18.04). I use these Tutorials to install Mattermost on Ubuntu:

https://idroot.net/linux/install-mattermost-ubuntu-18-04-lts/ and /tutorials/install-lamp-stack-ubuntu-18-04-lts/

If i use the command: “systemctl start mattermost.service” they get me this answer:

Job for mattermost.service failed because the control process exited with error code.
See “systemctl status mattermost.service” and “journalctl -xe” for details.

If i’m looking at systemctl status mattermost.service, so they tell me this:
● mattermost.service - Mattermost
Loaded: loaded (/etc/systemd/system/mattermost.service; enabled; vendor preset: enabled)
Active: activating (auto-restart) (Result: exit-code) since Mon 2018-08-20 15:06:06 UTC; 5s ago
Process: 4146 ExecStart=/opt/mattermost/bin/mattermost (code=exited, status=217/USER)
Main PID: 4146 (code=exited, status=217/USER)

Aug 20 15:06:06 mattermost systemd[4146]: mattermost.service: Failed at step USER spawning /opt/mattermost/bin/mattermost: No such process
Aug 20 15:06:06 mattermost systemd[1]: mattermost.service: Main process exited, code=exited, status=217/USER
Aug 20 15:06:06 mattermost systemd[1]: mattermost.service: Failed with result ‘exit-code’.
Aug 20 15:06:06 mattermost systemd[1]: Failed to start Mattermost.

If i’m looking at journalctl -xe, so they tell me this:
– Unit mattermost.service has begun starting up.
Aug 20 15:06:57 mattermost systemd[4155]: mattermost.service: Failed to determine user credentials: No such process
Aug 20 15:06:57 mattermost systemd[4155]: mattermost.service: Failed at step USER spawning /opt/mattermost/bin/mattermost: No such process
– Subject: Process /opt/mattermost/bin/mattermost could not be executed
– Defined-By: systemd
– Support: http://www.ubuntu.com/support

– The process /opt/mattermost/bin/mattermost could not be executed and failed.

– The error number returned by this process is 3.
Aug 20 15:06:57 mattermost systemd[1]: mattermost.service: Main process exited, code=exited, status=217/USER
Aug 20 15:06:57 mattermost systemd[1]: mattermost.service: Failed with result ‘exit-code’.
Aug 20 15:06:57 mattermost systemd[1]: Failed to start Mattermost.
– Subject: Unit mattermost.service has failed
– Defined-By: systemd

– Unit mattermost.service has failed.

– The result is RESULT.

I’m very confused, so I don’t know, why its not work.

Can someone help me pls? I don’t find the answer for my problem.

Here are some of my initial observations

According to our docs we support Ubuntu 14.04 and Ubuntu 16.04: https://docs.mattermost.com/install/requirements.html#mattermost-server-operating-system .

Here are our docs on how to install each https://docs.mattermost.com/install/install-ubuntu-1404.html and https://docs.mattermost.com/install/install-ubuntu-1604.html .

Would you be able to try the installation with one of these versions?

No, i’m use another Tutorial, cause i have Ubuntu 18.04.
So i thought, that i cannot use the Tutorial on your page.

So can i install mattermost on Ubuntu 18.04 or are you only supporting Ubuntu 14.04 and 16.04?

Hi @Luphina , I found this Ubuntu 18.04 guide that seems more detailed than the one you linked above. E.g. it lists pre-requisites such as setting up Nginx and SSL certificate: https://linuxize.com/post/how-to-deploy-mattermost-on-ubuntu-18-04/ .

Let me know if the guide is any better - if not, I’ll ask our developers for more help on this.

thank you for this tutorial. Mattermost are running now on Ubuntu 18.04. But i use Apache2 instead of Nginx.

So now i have other problems with the WebRTC.

I have the button for calls, but it always says “there was a problem connecting the video call”. I’m reading some topics, cause i don’t resolve it.

Thanks for your help.

Hi @Luphina ,

Can you help take a look at our docs related to WebRTC: https://docs.mattermost.com/deployment/webrtc.html ?

Can you also help take a look at this thread for troubleshooting tips: How to start WebRTC? .

Some tips include:

adding this value to the config.json "StunURI": "stun:stun.l.google.com:19302" , without updating the Janus server or any code changes.

setting the nat mapping in the janus cfg.

Hi @amy.blais

Yeah, i take this docs, but the WebRTC doesn’t work. I have adding this value to the config.json.
I don’t know, where the mistake is.

Hi @amy.blais ,

What OS and version is the Mattermost server installed? Ubuntu 18.04
What is your Mattermost server version? 5.2
Can you send a snippet of the Mattermost server logs around the time of the incident? No logs
Are you running Mattermost in a container and/or using container orchestration? Docker
Database Issues MySQL

Mattermost is running, i have only issues with webRTC. The Button to call with Member is available, but the connections failed.

Config.json

"ServiceSettings": {

"SiteURL": "",

"WebsocketURL": "",

"LicenseFileLocation": "",

"ListenAddress": ":8065",

"ConnectionSecurity": "",

"TLSCertFile": "",

"TLSKeyFile": "",

"UseLetsEncrypt": false,

"LetsEncryptCertificateCacheFile": "./config/letsencrypt.cache",

"Forward80To443": false,

"ReadTimeout": 300,

"WriteTimeout": 300,

"MaximumLoginAttempts": 10,

"GoroutineHealthThreshold": -1,

"GoogleDeveloperKey": "",

"EnableOAuthServiceProvider": false,

"EnableIncomingWebhooks": true,

"EnableOutgoingWebhooks": true,

"EnableCommands": true,

"EnableOnlyAdminIntegrations": true,

"EnablePostUsernameOverride": false,

"EnablePostIconOverride": false,

"EnableLinkPreviews": false,

"EnableTesting": false,

"EnableDeveloper": false,

"EnableSecurityFixAlert": true,

"EnableInsecureOutgoingConnections": true,

"AllowedUntrustedInternalConnections": "",

"EnableMultifactorAuthentication": false,

"EnforceMultifactorAuthentication": false,

"EnableUserAccessTokens": false,

"AllowCorsFrom": "",

"AllowCookiesForSubdomains": false,

"SessionLengthWebInDays": 30,

"SessionLengthMobileInDays": 30,

"SessionLengthSSOInDays": 30,

"SessionCacheInMinutes": 10,

"SessionIdleTimeoutInMinutes": 0,

"WebsocketSecurePort": 443,

"WebsocketPort": 80,

"WebserverMode": "gzip",

"EnableCustomEmoji": false,

"EnableEmojiPicker": true,

"EnableGifPicker": false,

"GfycatApiKey": "2_KtH_W5",

"GfycatApiSecret": "3wLVZPiswc3DnaiaFoLkDvB4X0IV6CpMkj4tf2inJRsBY6-FnkT08zGmppWFgeof",

"RestrictCustomEmojiCreation": "all",

"RestrictPostDelete": "all",

"AllowEditPost": "always",

"PostEditTimeLimit": -1,

"TimeBetweenUserTypingUpdatesMilliseconds": 5000,

"EnablePostSearch": true,

"EnableUserTypingMessages": true,

"EnableChannelViewedMessages": true,

"EnableUserStatuses": true,

"ExperimentalEnableAuthenticationTransfer": true,

"ClusterLogTimeoutMilliseconds": 2000,

Do you need more logs?

This is the message from Mattermost, if i call a member “There was a problem connecting the video call”

Console: Failed to load resource: the server responded with a status of 500 (Internal Server Error)
If i open the …:8065/api/v4/webrtc/token: {“id”:“api.context.session_expired.app_error”,“message”:“Ungültige oder abgelaufene Sitzung, melden Sie sich erneut an.”,“detailed_error”:"",“request_id”:“5z4f8azb83fc3qrszcgkroqzcr”,“status_code”:401}