Zabbix 3.0.9

Ajin

Hi All,

Testing Zabbix 3.0.9 , Configured zabbix-server , configured agent in another simple lamp machine.
Added http , mysql ,sshd and OS Linux template for the host , and server is detecting changes and service restarts ect.

But when tried to configure configuration > Action getting an error .

The action tries to execute the remote command and fails with the error "Cannot establish SSH session: Failed getting banner"

Even tried to create an action in zabbix-server itself(By enabling zabbix-agent in zabbix server and created an action to restart sshd service if went down) . But again the same error reoccurs.

Any body have faced the same issue ?

wirestyle22

@Ajin Can you connect directly through ssh?

Ajin

@wirestyle22 : Yes both ssh and telnet gets connected.

wirestyle22

@Ajin Do you have selinux enabled? If so, disable it temporarily and test.

If that works you can run this to allow httpd:

setsebool -P httpd_can_network_connect 1

Ajin

@wirestyle22 : selinux and firewalld both are disabled.

Ajin

@wirestyle22 said in Zabbix 3.0.9:

setsebool -P httpd_can_network_connect 1

[root@2 ssh]# setsebool -P httpd_can_network_connect 1
setsebool: SELinux is disabled.

wirestyle22

@Ajin said in Zabbix 3.0.9:

@wirestyle22 said in Zabbix 3.0.9:

setsebool -P httpd_can_network_connect 1

[root@2 ssh]# setsebool -P httpd_can_network_connect 1
setsebool: SELinux is disabled.

Right, that was if selinux was enabled and disabling it fixed the problem--which it didn't.

wirestyle22

paging @dafyre as our resident Zabbix guy

Ajin

@wirestyle22 : Hey thanks for that.

scottalanmiller

@wirestyle22 said in Zabbix 3.0.9:

paging @dafyre and our resident Zabbix guy

And @Mike-Davis

dafyre

Can you post a screenshots of how you have your action configured?

Also, in the Zabbix Agent, you'll need to make sure that both the Server and ServerActive items are set to be the IP address of your zabbix server... and that Remote Commands are enabled.

/etc/zabbix/zabbix_agentd.conf

#IP Of Zabbix Server
Server = 192.168.200.10
ServerActive = 192.168.200.10

#Enable Remote Commands for restarting services
EnableRemoteCommands = 1

Ajin

@dafyre : both the Server and ServerActive items are set to the IP address of zabbix server.
Remote Commands are also enabled.

Attaching screenshot for action conditions & operations.

Mike Davis

@scottalanmiller said in Zabbix 3.0.9:

@wirestyle22 said in Zabbix 3.0.9:

paging @dafyre and our resident Zabbix guy

And @Mike-Davis

I've only set up the action to email. Never tried remote commands, but it gives me some ideas.

Ajin

@Mike-Davis : My Idea was to create a monitoring / alerting system and also minimize downtime for critical issue like Apache , Mysql and other critical server services which affects server perfomance, This action section actuality does it all since it can both send alerts via email and sms and also execute remote commands.

But of-course, only if it is configured correctly and works well

hobbit666

I'm going to be looking more at Zabbix over the next few months and exploring it's power and potential

Mike Davis

@Ajin said in Zabbix 3.0.9:

@Mike-Davis : My Idea was to create a monitoring / alerting system and also minimize downtime for critical issue like Apache , Mysql and other critical server services which affects server perfomance, This action section actuality does it all since it can both send alerts via email and sms and also execute remote commands.

But outsource, only if it is configured correctly and works well

It's a good idea. I haven't had a need yet, but I'm sure that day will come.

dafyre

@Ajin said in Zabbix 3.0.9:

@dafyre : both the Server and ServerActive items are set to the IP address of zabbix server.
Remote Commands are also enabled.

Attaching screenshot for action conditions & operations.

What if you set the Remote Command type to "Custom Script" and had it execute something like systemctl restart apache2 or httpd, whatever your distro uses...

0_1495114640947_upload-6dc12176-0deb-482e-b0a2-955dae73f93e

Ajin

@dafyre : Thankyou so Much because ..Yesssss That did the job ...Remote command got executed in the host when selected the TYPE as custom script and services which went down is restarting in 60 seconds as configured.

Another thing i am testing now is , Since the Action Section uses zabbix-agent to run the custom script type to execute remote command ; what if the zabbix-agent itself went down or had some issue and it coudnt respond to server checks ? . Here this scenario (Choosing the TYPE as custom script)will fail for all other Actions . IN that case i need to fix the Remote command execution via SSH and also Test the GLOBAL SCRIPT Type to check zabbix-agent service.

Since i am planning to Implement this Tool in my Production Environment , need to think and test every possible scenarios where server or its critical services can get screwed up !!! And now next global script and again ssh ..

wirestyle22

@Ajin Glad you got that working

dafyre

@dafyre said in Zabbix 3.0.9:

@Ajin said in Zabbix 3.0.9:

@dafyre : both the Server and ServerActive items are set to the IP address of zabbix server.
Remote Commands are also enabled.

Attaching screenshot for action conditions & operations.

What if you set the Remote Command type to "Custom Script" and had it execute something like systemctl restart apache2 or httpd, whatever your distro uses...

Glad that it worked for you!