Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins) I have registered over 100 hosts successfull but something is wrong with this one when I use that command: & 'C:Program Files (x86)checkmkservicecmk-agent-ctl. service Ikkarus13 (Sascha Kunimünch) May 25, 2022, 1:18pm. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. 02. exe . In your case doing proxy. C:Program Files (x86)checkmkservice>cmk-agent-ctl. socket systemctl disable cmk-agent-ctl-daemon. 488899 +01:00] INFO [cmk_agent_ctl] srcmain. 1. 5. 1. The controller is executed under the cmk-agent user, which has limited privileges, e. This was not expected as I created rules in “Agent controller” {'agent_ctl_enabled': True}. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. 0p10 OS: linux The hosts agent supports TLS, but it is not being used. However, the certificate rolled out by the agent updater ruleset seems to be insufficient. If it is xinetd remove the. Then I installed the agent on the server, and registered, and this part finally worked, the server can monitor itself (even if I don’t understand why cmk-agent-ctl register --hostname 127. After reading the warning message The agent controller is operating in an insecure mode I started to read the docs on what should be done. service should work as expected. com--site FOO --user BAR --password FOO The new agents at 2. Installed the agent on a Server (Windows and Ubuntu) Registered the agent with the following command: cmk-agent-ctl register --hostname --server --site --user automation --password. agent_pairing") to their role. NOTE: A registered host will refuse all unencrypted connections. 1. CMK 2. cme and I’m no longer able to register new hosts with an automation user “cmkautomation” that I created a while ago (with role “agent_registration”). cfg. Upon first try, “cmk-agent-ctl register. 0) master 1. If there are leftovers from 2. 1. Hi, the check-mk-agent is running (in xinetd mode) - trying to register a client is not possible because the cmk controller is looking for a socket (systemd) [root@jumphost]# cmk-agent-ctl status Version: 2. Linux: cmk-agent-ctl register --server meinserver. 0. 1. On a related note, I’ve been following the beginner’s guide on setting up Checkmk and found that registering the Checkmk Agent for monitoring the monitoring server itself not working. g. 0. 04. I had to add the checkmk user. consorzioburana. New replies are no longer allowed. Agent Updater (Agentenbäckerei), Discovery des Agent Controller Ports, mit Transportverschlüsselung. To register the agent, I ran: sudo cmk-agent-ctl register --hostname localhost --server localhost:8001 --site cmk --user cmkadmin That gives: > sudo cmk-agent-ctl status Version: 2. 2 system. exe' register -s checkmk. MichaelI’m running 2. 1 Like. cre root@9529f647cd27:/# omd sites SITE VERSION COMMENTS cmk 2. I should have mentioned I have a network device sitting in-between which is presenting a different certificate (the wildcard cert signed by a public CA) and I haven’t changed any CA settings outside the web UI. gawainsr2 August 15, 2022, 5:52pm 1. The agent control use the port 8000 for communication. mschlenker (Mattias Schlenker) May 30, 2022, 6:11pm 4. If I try to register (not register-new) a server, which has been in the monitoring since yea…The agent control use the port 8000 for communication. Jun 17 10:57:15 nc systemd[1]: cmk-agent-ctl-daemon. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. apt remove --purge check-mk-agent dpkg -i check-mk-agent_2. If it is systemd please give us the output of systemctl --version. sh script. After the installation everything worked. de--site meine_site --user user --password password --hostname mein-host. Upon first try, “cmk-agent-ctl register. 1. domain. When you have done all this, install the agent again and it will work properly. 1 gave 404 Not Found: Host 127. to checkmk. I am experiencing a problem with registering the agent: CMK version: 2. 0p13. scheint mir noch nicht ganz ausgereift. 0. 3. So now you must de-register, on the host: cmk-agent-ctl delete-all --enable-insecure-connections Then on the CMK server: Properties of host, then menu entry Host > Remove TLS registration Afterwards connections should work albeit insecure. Registration indeed is good. no login shell, and is used only for data transfer. CMK Version: 2. Segmentation fault (core dumped) The same result also with the all needed parameters for the registration. Thanks for your responses! @cyr0nk0r I rebaked the Agent using HTTP only and got rid of the. 0 RAW OS: Windows Server 2019 Agent controller not registered After multiple clean installations specifically on this server I can’t get CheckMK to work. This might be a bug. 1. CMK version: 2. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. Die Registrierung der Agents in der Version 2. exe” register --site yousitename --server yourcmkserver --user automation --hostname windows_box_hostname --password1. cmk-agent-ctl register --server cmkserver:443 --trust-cert --site cmksite --user username --password password --hostname monitoringhost On Debian 11 if got the following outputThe Linux agent of Checkmk version 2. I’m running 2. This worked perfectly fine in CMK 2. gerhards. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. Release notes. 1. 6. cmk-agent-ctl register --hostname localhost --server server:8000 --site mysite --user cmkadmin -vv. 1 does not exist. the check-mk-agent is running (in xinetd mode) - trying to register a client is not possible because the cmk controller is looking for a socket (systemd) [root@jumphost]# cmk-agent-ctl status Version: 2. 1. The hosts agent supports TLS, but it is not being used. The cmk-agent user is created during the installation of the agent. , I had to put the public hostname). Then I installed the agent on the server, and registered, and this part finally worked, the server can monitor itself (even if I don’t understand why cmk-agent-ctl register --hostname 127. 1:8655 --site cmk --user cmk_admin. 1. The exact command line is this: cmk-agent-ctl register -v -H HOSTNAME -P 'PASSWORD' -s SUBDOMAIN. 1. local:8000 -s checkmk. Ultimately, Checkmk was showing the agents were not registered because they were not in fact registered. service should work as expected. Hi everyone, below is the output of the “cmk-agent-ctl. Ich registriere den Agent : sudo cmk-agent-ctl register --hostname hlcmk --server 10. Yes I did use the” cmk-agent-ctl register command, after that I got this message. com--site FOO --user BAR -. Thx for the quick reply, adding the port gives still the same result: root@paperless-ngx:~# cmk-agent-ctl register --trust-cert -H paperless-ngx. The Agent Controller cmk-agent-ctl is the component within the agent that is responsible for transporting the data collected by the agent script. B. exe register --trust-cert -vv” command: [2023-02-10 12:54:18. 2. echo y|sudo cmk-agent-ctl register --hostname vmansible01 –server vmcheckmk01. 4. Since the machine you’re trying to monitor is still 2. I created the folder manually and changed ownership, and now the registration. domain. Welcome to the Checkmk User Guide. Please execute with sufficient permissions (maybe try 'sudo'). 4:8000 --site cmk --user cmkadmin --password password. 1. Version: 2. The Agent Receiver tells the Agent Controller. Using previous settings from /etc/cmk-update-agent. no login shell, and is used only for data transfer. 1. apt remove --purge check-mk-agent dpkg -i check-mk-agent_2. local:8000 -s checkmk. . So if you make any changes to the config file then you need to reload configuration or restart the agent. Agent Controller is not running, no config files can be found in the systemd directory and within xinetd. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. ourcompany. 0) master 1. mydomain. For Debian remove the cmk-agent and purge the configuration, than reinstall the agent, this purges the xinetd configuration. OS version: TrueNAS SCALE 22. raptorswithhats. The Agent Controller cmk-agent-ctl is the component within the agent that is responsible for transporting the data collected by the agent script. Alle Hosts angelegt mit Hostname und IP Adresse. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins) sudo: cmk: command not found. In checkmk for the host service got below warning. You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. I am trying to register an agent installed on a Windows Server 2019. The agents' Agent Controller makes a request for registration to the server’s Agent Receiver, transmitting the data required to create the host. 2. 4. Just in case: We are prepared for cases where the agent controller cannot be started or. 2. Disable TLS registration on the CMK server: Properties of host, menu entry Host > Remove TLS registration; Afterwards, ss should show xinetd claiming the connection test should work. json to keep the FW as closed as possible – I cannot test it with the bakery, we sadly have to use CRE+Puppet) kai226 June 14, 2023, 11:57am 4. 0p15. The cmk-agent user is created during the installation of the agent. local -i home -U cmkadmin ERROR [cmk_agent_ctl] Failed to discover agent receiver port from Checkmk REST API, both. For Debian remove the cmk-agent and purge the configuration, than reinstall the agent, this purges the xinetd configuration. You can learn how to use the agent here. For the Linux hosts: Is the agent controller running? ps waux | grep cmk-agent-ctl Might the hosts be limited (by boot parameter) for a strict IPv4 only setup? Or might registration for TLS has been failed? You can check with cmk-agent-ctl status. TLD -i SITE-NAME -U USERNAME. C:ProgramDatacheckmkagentconfigcasall_certs. 6. Die entsprechenden Optionen können Sie sich beim Aufruf von cmk-update-agent register --help anzeigen lassen. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. 1 sec. CMK version: 2. Thx for the quick reply, adding the port gives still the same result: root@paperless-ngx:~# cmk-agent-ctl register --trust-cert -H paperless-ngx. system (system) Closed October 17, 2023, 5:42am. g. net:8000--site cmk –user automation --password MYTOKEN sudo reboot (To verify it continues to work post-reboot) andreas-doehler August 15, 2022, 7:25pm 6. There were some user permission issues with the agent registration (cmk-agent-ctl register. WalterH (Walter Hofstädtler) May 30, 2022, 5:42pm 31. socket failed. OS version: TrueNAS SCALE 22. 1. 1. Password for user ‘cmkadmin’: Successfully registered agent of host “monitor2” for deployment. socket (failed failed) so I stopped and disabled them, then did systemctl daemon-reload and systemctl. 0 2. TLD -i SITE-NAME -U USERNAME This worked perfectly fine in CMK 2. 0p20 Debian 11 Hi everyone, below is the output of the “cmk-agent-ctl. Sie können sich mit cmk-agent-ctl help die Kommandohilfe anzeigen lassen, auch spezifisch für die verfügbaren Subkommandos, z. Redirecting to /bin/systemctl reload xinetd. Bei einem Netzwerkdienst liegt es nahe, den Dienst über das Netzwerk abzufragen und über diesen Weg auch zu überwachen. CMK 2. Warning: This version breaks the agent receiver on IPv4-only Checkmk servers which have completely disabled IPv6 support on kernel level. 0:8282 --site cmk --user automation --password. Hello. mschlenker (Mattias Schlenker) May 30, 2022, 6:11pm 4. On Linux systems, the agent controller will be. 0p20 Ubuntu 20. 0 onwards), you have to add the following rights (internal name “general. 4 --server 1. Der Agent Controller cmk-agent-ctl kümmert sich um den Transport der vom Agentenskript gesammelten Daten. On a related note, I’ve been following the beginner’s guide on setting up Checkmk and found that registering the Checkmk Agent for monitoring the monitoring server itself not working. service systemctl disable check-mk-agent. , I had to put the public hostname). C:\ProgramData\checkmk\agent\config\cmk-update-agent. 489987 +01:00] INFO [cmk_agent_ctl] srclib. If the host is monitored by multiple sites, you must. service --now $ sudo systemctl restart check-mk-agent. local -i home -U cmkadmin ERROR [cmk_agent_ctl] Failed to discover agent receiver port from Checkmk REST API, both. no login shell, and is used only for data transfer. 1. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. If the Agent Receiver accepts the request, registration is performed and a TLS-encrypted connection is established. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. error: The subcommand ‘register --trust-cert’ wasn’t recognized Did you mean ‘register’? If you believe you received this message in error, try re-running with ‘cmk-agent-ctl. 1 Like. NOTE: A registered host will refuse all unencrypted connections. 234. exe – register --trust-cert’ USAGE: cmk-agent-ctl. Here is a fix that worked for me, in case anyone else runs into this. The Windows agent. service cmk-agent-ctl-daemon. As suggested in another post i read i checked:-that port 8000 is open-omd config show | grep AGENT_RECEIVER show port 8000Latest version of CheckMK. Checkmk. The cmk-agent user is created during the installation of the agent. exe' register -s checkmk. The registration is done using the Agent Controller cmk-agent-ctl, which provides a command interface for configuring the connections. 488899 +01:00] INFO [cmk_agent_ctl] srcmain. The register command cmk-agent-ctl register often gets confused with the Agent update registration cmk-agent-update register, but these are two different registration types: one for TLS encryption and one for registering automatic updates (Agent Bakery, cee). If the server you want to monitor and register is the monitoring docker. After a reboot the cmk-agent-ctl-daemon and the check-mk-agent. 16-150300. Yes I did use the” cmk-agent-ctl register command, after that I got this message. 04. Register. exe” register --site yousitename --server yourcmkserver --user automation --hostname windows_box_hostname --password 1. this is initiated by the cloud host contacting CMK server behind our office. (We used cmk-agent-ctl proxy-register → deploy json to host → cmk-agent-ctl import . I’m using CMK 2. In your case doing proxy. cmk-update-agent –v. Checkmk Community Trouble after upgrading to 2. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. socket --now Issue the following command to register the host with your Checkmk server. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. deb. Checkmk Server: Checkmk version: 2. So now you must de-register, on the host: cmk-agent-ctl delete-all --enable-insecure-connections Then on the CMK server: Properties of host, then menu entry Host > Remove TLS registration Afterwards connections should work albeit insecure. Use the cmk-agent-ctl register command to register. Bei der Registrierung der Agents ergibt sich bei beiden Server folgender Fehler: <HOST>:~ # cmk-agent-ctl register --hostname <HOSTNAME> --server 192. 0-1_all. The cmk-agent user was sucessfully created. socket systemctl status cmk-agent-ctl-daemon. You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. This morning all Windows Agents were suddenly no longer registered. 1. This morning all Windows Agents were suddenly no longer registered. Ob der Host dabei für den Pull-Modus (alle Editionen) oder den Push-Modus (nur Cloud Edition) konfiguriert ist, macht für die Befehlsbeispiele keinen Unterschied. This is the command we used to register the agent: C:Windowssystem32> "C:Program Files (x86)checkmkservicecmk-agent-ctl. Die Seite habe ich auch schon gefunden aber wie gesagt so richtig verstanden bzw. DOMAIN. Checkmk Enterprise Edition 2. With that flag added the machine registers just fine. OS version: Rocky Linux release 9. 0 adds the Agent Controller and new features to the agent program. 0p12. 2. gerhards. 1. Der Linux-Agent der Checkmk-Version 2. If the host is monitored by multiple sites, you must register to all of them. The agent-receiver of the first checkmk instance usually listens on port 8000, this is the port you need the agent to register against. exe" register --hostname s3mo-tape. exe' register -s checkmk. xyz:9800 --site cmk --user BAR --password FOO. We strongly recommend to enable TLS by registering the host to the site (using the cmk-agent-ctl register command on the monitored host). Explcit host: xxx. 0p6. 2. 3, no problem on installing, and registering the site and the localhost, but with windows keeps me throwing a crit state with the Check_MK Service. 2 system. cmk-agent-ctl delete-all --enable-insecure-connections; cmk-agent-ctl status; cmk-agent-ctl register --hostname $(hostname -f) --server checkmk21-prod. Whether the host is configured for the pull mode (all editions) or the push mode (only the Cloud Edition) makes no difference for the command examples. 1. The port can either be included in the server name argument ( -s ), or it can be left out. The Agent Controller cmk-agent-ctl is the component within the agent that is responsible for transporting the data collected by the agent script. This worked perfectly fine in CMK 2. Now you need to register the agnet for TLS handshake. OS version: Ubuntu Server 22. But the agent controller now periodically reads its config to check whether it is in pull or push mode – so it might take up to three minutes until SSL works after a registration. domain. The register command cmk-agent-ctl register often gets confused with the Agent update registration cmk-agent-update register, but these are two different registration types: one for TLS encryption and one for registering automatic updates (Agent Bakery, cee). 1 gave 404 Not Found: Host 127. 4. service should work as expected. Dear friends of Checkmk, the new stable release 2. But if cmk-agent-ctl cannot be started, access fails. 1. Specify the correct port when calling the registration command. rs:29: No connection could be made because the target. 6 Likes. cmk-agent-ctl register -v -H HOSTNAME -P 'PASSWORD' -s SUBDOMAIN. Registration indeed is good. Baked and signed the agent. Thank you again Anders! My humility and I will go back into the shadows! Wenn ich aber beim Registrieren den richtigen Port mitgebe, dann gehts…. Checkmk. Troubleshooting. 0 Agent socket: inoperational (!!) IP allowlist: anyyour solution does not work it does not allow me to automatically register my agent after its installation Capture d'écran 2023-09-28 120008 1443×60 18 KB aeckstein (Andre Eckstein) September 29, 2023, 2:38pmCMK version: 2. Hi @robin. On all other hosts the cmk-agent-ctl-daemon fails and registration is not possible. Für Linux habe ich cmk-agent-ctl register --hostname xxx --server. 1. sh script. The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. to switch your agent into SSL mode (and not. eu --site monitoring ^. Server certificate details: [2022-06-01. Dann hast du die Herangehensweise schon gefunden, wenn man die Zertifikate noch nicht im Griff hat. The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. com. service should work as expected. 1. Checkmk. WalterH (Walter Hofstädtler) May 30, 2022, 5:42pm 31. You also need a --hostname flag, like --hostname test. 0. Auto-confirmation for cmk-agent-ctl register command? General. 1. If it is xinetd remove the. but this just ended in automation2 searching for automation accounts secrets, removed automation2. So, get this from “omd config show” on your CMK. „TLS is not activated on monitored host (see details)“. 0b4-1 OS: Ubuntu 20. sh script. mydomain. Ultimately, Checkmk was showing the agents were not registered because they were not in fact registered. But nothing worked. to switch your agent into SSL mode (and not legacy mode), but that’s a different subject. 0. You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. XXX. g. The controller is executed under the cmk-agent user, which has limited privileges, e. Username: xxxxx@pve. 0 2. This component is separate from the Agent Updater. After the installation everything worked. Fixed that with create a new User “automation” and created the file automation. net:8000--site cmk –user automation --password MYTOKEN sudo reboot (To verify it continues to work post-reboot) andreas-doehler (Andreas) August 15, 2022, 7:25pm 6. net -i STAR -P 'XXXXX' -U automation -H sys-vbr02 Apparently I’m too stupid to find the correct call for agent registration via REST API in any documentation. Der für die verschlüsselte Kommunikation mit dem Checkmk-Server zuständige Agent Controller cmk-agent-ctl. Please provide me with the output of: systemctl status check-mk-agent. I installed the CheckMK Agent on a TrueNAS SCALE host. This might be a bug. slice (loaded active) and check_mk. andreas-doehler (Andreas) January 8, 2023, 3:48pm 2. Our Manufacturers. Hello. 5. SebLthr June 14, 2022, 8:17am 1. slice (loaded active) and check_mk. If you use the bakery, the agent was baked with enabled cmk-agent-ctl. When you have done all this, install the agent again and it will work properly. 1. The cmk-agent user was sucessfully created. The registration is done using the Agent Controller cmk-agent-ctl, which provides a command interface for configuring the connections. CMK 2. root@kerneltalks # service xinetd reload. exe – register --trust-cert’ USAGE: cmk-agent-ctl. Yes I did use the” cmk-agent-ctl register command, after that I got this message. cmk-agent-ctl delete-all --enable-insecure-connections; cmk-agent-ctl status; cmk-agent-ctl register --hostname $(hostname -f) --server checkmk21-prod. ” failed with this error: "Request failed with code 500 Internal Server Error: Internal Server Error" The registration then aborts, since we cannot continue without knowing the correct port.