We strongly recommend to enable TLS by registering the host to the site (using the `cmk-agent-ctl register` command on the monitored host). 2 release. If it is xinetd remove the. 1. Bei einem Netzwerkdienst liegt es nahe, den Dienst über das Netzwerk abzufragen und über diesen Weg auch zu überwachen. state. c:2633). 0b4_0. Agent Controller is not running, no config files can be found in the systemd directory and within xinetd. In your case doing proxy. omd start. sh script. 1 using the Agent Controller. exe” register --site yousitename --server yourcmkserver --user automation --hostname windows_box_hostname --password 1. 0/26. The agent controller is well deployed and configured : “C:Program Files (x86)checkmkservicecmk-agent-ctl. 0 adds the Agent Controller and new features to the agent script. socket), aborting``` If I als run the daemon: ```cmk-agent-ctl daemon &``` It starts responding to status command, but still won't register the node: ```root@adfb306b5d58:/# cmk-agent-ctl status Version: 2. exe . 1. 1. After a reboot the cmk-agent-ctl-daemon and the check-mk-agent. 489987 +01:00] INFO [cmk_agent_ctl] srclib. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. domain. 168. 1. rs:14: starting [2023-02-10 12:54:18. Hi everybody, i’am new to checkmk and trying to configure the agent but getting the same message, i couldn’t understand why. Just in case: We are prepared for cases where the agent controller cannot be started or. For more information try --help Command for registration. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. 0-1_all. The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. In your case doing proxy. Hi everyone, below is the output of the “cmk-agent-ctl. NOTE: A registered host will refuse all unencrypted connections. Install the suitable Checkmk agent on the server you want to monitor and add the server as a host in Checkmk. cd /etc sudo rm -r check_mk cd /var/lib sudo rm -r check_mk_agent sudo rm -r cmk-agent cd /usr/lib sudo rm -r check_mk_agent sudo systemctl daemon-reload. Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins) sudo: cmk: command not found. The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. com:8000 --site itbetrieb --user automation --password xxxxxxxx --trust-cert -vv Version: 2. In your case. 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. gerhards. 57. Register the host on the Checkmk server by invoking cmk-update-agent register. 4. no login shell, and is used only for data transfer. You can learn how to use the agent here. Now you need to register the agnet for TLS handshake. I had to add the checkmk user again. 2. agent_pairing”) to his/her role. DOH I forgot I had set a custom port for agent receiver as i had a conflict for 8000 on my docker host. When I try to register the client to the server (which is inside of docker) I try the following line: (I only have IP addresses and firewall is open) cmk-agent-ctl register --hostname ip_of_client --server 1. Ich registriere den Agent : sudo cmk-agent-ctl register --hostname hlcmk --server 10. Das funktioniert. But nothing worked. This one is listening at port 8000. 0p22 agent by running cmk-agent-ctl on the 2. This might be a bug. socket systemctl status cmk-agent-ctl-daemon. It has to match the actual hostname used by the Checkmk server, found under “Setup” > “Hosts”. The controller is executed under the cmk-agent user, which has limited privileges, e. In order to register at a Checkmk site, the agent controller ( cmk-agent-ctl) needs to know, among others, the name of the server where the site is running and a port. 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. exe . mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. Jun 17 10:57:15 nc systemd[1]: cmk-agent-ctl-daemon. Here it makes sense to pass the required registration information directly via the command. cmk-agent-ctl register --hostname myhost --server checkmk. andreas-doehler (Andreas) January 8, 2023, 3:48pm 2. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. mit cmk-agent-ctl help register. The port can be different in your case. Checkmk. If you haven’t done yet please register the agent controller as well. . You also need a --hostname flag, like --hostname test. CMK agent is up and running, host is added to Check MK server and now I want to set up TLS connection. 0. I’m facing the same issue (and also running checkmk raw in a Docker container) on a X86_64 Debian Bullseye host. DOMAIN. CMK Checkmk Enterprise Edition 2. –server checkmk. exe register --trust-cert -vv” command: [2023-02-10 12:54:18. Could you please check who is claiming port 6556? ss -tulpn | grep 6556 This should be cmk-agent-ctl in daemon mode. $ sudo cmk-agent-ctl register --hostname localhost --server checkmk. All commands to be executed on the host to be monitored. ). Rg, ChristianThe Agent Controller cmk-agent-ctl is the component within the agent that is responsible for transporting the data collected by the agent script. C:\ProgramData\checkmk\agent\config\cas\all_certs. cee Ubuntu 16. com--site FOO --user BAR -. CMK 2. I’ve installed the agent and succesfully register on OS windows 7x64 and. 5. Das funktioniert und auch eventuelle Fehler: TLS is not activated on monitored host verschwinden. For some reason I am no longer able to register my agents with TLS. cmk-agent-ctl register --hostname 1. I had to add the checkmk user again. 2. I am trying to register an agent installed on a Windows Server 2019. 1. 0. 04. no login shell, and is used only for data transfer. This might be a bug. The controller is executed under the cmk-agent user, which has limited privileges, e. TLD -i SITE-NAME -U USERNAME. CMK 2. 1. 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. 1. In your case doing proxy. 0. But if cmk-agent-ctl cannot be started, access fails. This port can be found out via omd config > Basics > AGENT_RECEIVER_PORT Of course, this port has to be exposed for the. I get a return with value: 16 The web test connection has a successfull ping but the agent. exe" status It also seems that you have multiple sites on your Checkmk server based on port 8001 in the response. I installed the CheckMK Agent on a TrueNAS SCALE host. Is there a switch to automatically confirm the registration prompt during the agent registration prompt for scripted (Ansible) provisioning? I’m currently doing this via a clunky method of echo y| (agentctl command)echo y|sudo cmk-agent-ctl register --hostname vmansible01 –server vmcheckmk01. Install the suitable Checkmk agent on the server you want to monitor and add the server as a host in Checkmk. 04. 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. Our Manufacturers. 1. scheint mir noch nicht ganz ausgereift. DOMAIN. 1. 1 Like. service should work as expected. no login shell, and is used only for data transfer. B. 0 onwards), you have to add the following rights (internal name “general. 0p15 OS version: TrueNAS SCALE 22. 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. com:443 -i cmk --user automation . To register a host, users need the following permissions: Agent pairing. local -i home -U cmkadmin ERROR [cmk_agent_ctl] Failed to discover agent receiver port from Checkmk REST API, both. C:Program Files (x86)checkmkservice>cmk-agent-ctl. [[email protected] It seems that the host you are trying to register is already registered at the Checkmk site. This might be a bug. If I try to register it with the command: cmk-agent-ctl register --detect-proxy --hostname FOO --server bla. 1 Like. For a user to be able to do the cmk-agent-ctl register, which is needed to enable the TLS encryption (available from 2. But when the distributed server wants to query the remote agent: [agent] Communication failed: [SSL: SSLV3_ALERT_HANDSHAKE_FAILURE] sslv3 alert handshake failure (_ssl. You’ll also need to do something like cmk-agent-ctl register. 2. For Debian remove the cmk-agent and purge the configuration, than reinstall the agent, this purges the xinetd configuration. exe" ^ register ^ --hostname mynewhost ^ -. com. secret with the password as String. 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. net -i STAR -P 'XXXXX' -U automation -H sys-vbr02Registration indeed is good. This might be a bug. 1. service: Scheduled restart job, restart counter is at 2. 02. When I try to register the agent on the host system with: cmk-agent-ctl register --hostname some_hostname --server 127. If it is the second option you should review roles & permissions. 2. 1. But if cmk-agent-ctl cannot be started, access fails. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. 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. 1. New install of CMK (via RPM) - trying to just register the localhost agent. From its very beginning, monitoring Windows servers has been one of the most important tasks performed by Checkmk. 1:8655 --site cmk --user cmk_admin. The registration against the corresponding slaves works fine and I can see with cmk-agent-ctl status, that the host is registered and in pull-mode now: image 843×285 37. 1. Die Registrierung klappt einfach nicht (die Hosts sind aber auch schon aus der 2. Checkmk Server: Checkmk version: 2. Thanks for your responses! @cyr0nk0r I rebaked the Agent using HTTP only and got rid of the. Ok, so the user I’m using to do the agent registration. 489987 +01:00] INFO [cmk_agent_ctl] srclib. rs:41: Loaded config from. omd update. Added new host in CMK. When I try to register the agent on the host system with: cmk-agent-ctl register --hostname some_hostname --server 127. Tahnks a lot for your tip. As suggested in another post i read i checked:-that port 8000 is open-omd config show | grep AGENT_RECEIVER show port 8000Jun 17 10:57:15 nc systemd[1]: cmk-agent-ctl-daemon. 0p20 Debian 11. Checkmk Enterprise Edition 2. If the host is monitored by multiple sites, you must register to. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. The port can either be included in the server name argument ( -s ), or it can be left out. New replies are no longer allowed. 1 gave 404 Not Found: Host 127. to checkmk. target. 234. domain. If you want to use the agent in legacy mode, you need to disable cmk-agent-ctl in bakery rules. You have three options here: Make the REST API call work. This can be problematic if you are monitoring the same host from a site running Checkmk version 2. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. THaeber • 5 mo. 1 the monitoring data sent from the monitored host to the monitoring server is TLS encrypted and compressed by default. You already entered the right command with openssl s_client -connect SLAVE01:443. –user automation --password “xxx”. ourcompany. This can be problematic if you are monitoring the same host from a site running Checkmk version 2. serviceSo 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. p16 OS version: RH8,Windows Server 2019 Error message: I can’t use the cmk-agent-ctl. 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. local:8000 -s checkmk. a re-register has the same effect, even with a cmk-agent-ctl delete and a “remove TLS registration”. Upon first try, “cmk-agent-ctl register. Upon first try, “cmk-agent-ctl register. The added executable is called cmk-agent-ctl. CMK version: 2. And now. when i executing the command remotely via powershell i’m. 0p20 Ubuntu 20. service: Start request repeated too quickly. The controller is executed under the cmk-agent user, which has limited privileges, e. 0/26. Hi @robin. If I try to register it with the command: cmk-agent-ctl register --detect-proxy --hostname FOO --server bla. com --site FOO --user BAR --password FOO. ). I have purged checkmk, rebooted and reinstalled the agent on the one hosts but this is not a procedure I really want to do on all my hosts because even 60 seconds of downtime will require careful planning in advance, which will turn the mass registration. Please provide me with the output of:. omd stop mysite. 0. CMK version: 2. INFO [cmk_agent_ctl::site_spec] Failed to discover agent receiver port using ERROR [cmk_agent_ctl] Failed to discover agent receiver port from Checkmk REST API, both with and Run with verbose output to see errors. com:8000/cmk. cre root@9529f647cd27:/# omd sites SITE VERSION COMMENTS cmk 2. exe register --hostname SRV001 --server <CHECK_MK_IP> --site mysite --user automation --password <PASSWORD>check_mk agent runs on top of xinetd service in Linux. I tried the following: apt purge check-mk-agent; manually removed some leftovers rm -r /var/lib/cmk-agent rm -r /var/lib/check_mk_agent; systemctl | grep check still showed two services, system-check_mk. mictlancihuatll. 0. The cmk-agent user was sucessfully created. I confused the keyword register on cmk-agent-ctl register with cmk-update-agent register or perhaps on some subconscious level assumed the first would handle both. If you want to use the agent in legacy mode, you need to disable cmk-agent-ctl in bakery rules. The hosts agent supports TLS, but it is not being used. The Windows agent of Checkmk version 2. ” failed with this error: "Request failed with code 500 Internal Server Error: Internal Server Error" root@linux# cmk-agent-ctl register --hostname localhost --server mycmkserver --site mysite --user cmkadmin Waren die angegebenen Werte korrekt, werden Sie aufgefordert, die Identität der Checkmk-Instanz zu bestätigen, zu der Sie die Verbindung herstellen wollen. serviceCan you use the option trust-cert ? Also, what is the systemd version on your system ?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. Server certificate details: [2022-06-01. 0. One of my hosts is producing this error, while most others register fine: root@sshgateway:~# cmk-agent-ctl register --hostname gateway. 2 system. g. Unfortunately, the problem remains: C:WINDOWSsystem32>"C:Program Files (x86)checkmkservicecmk-agent-ctl. This was not expected as I created rules in “Agent controller” {'agent_ctl_enabled': True}. As suggested in another post i read i checked:-that port 8000 is open-omd config show | grep AGENT_RECEIVER show port 8000Description: Proxmox VE. Bis einschließlich b2 war es so, dass der cmk-agent-ctl NICHT am Socket lauscht, solange er nicht für die TLS Verbindung registriert ist. 04. mydomain. The Agent Receiver tells the Agent Controller. cmk-agent-ctl delete-all --enable-insecure-connections; cmk-agent-ctl status; cmk-agent-ctl register --hostname $(hostname -f) --server checkmk21-prod. 0. 0. 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. 1. 1. Use the cmk-agent-ctl register command to register. 1 server? You have to run the cmk-agent-ctl on the machine running the agent, not from the server. In any of these cases I can replace localhost with the actual hostname as well and the results don’t change (they’re identical). 0 or earlier. Could you please check who is claiming port 6556?. check_mk agent runs on top of xinetd service in Linux. exe” register --site yousitename --server yourcmkserver --user automation --hostname windows_box_hostname --password1. CMK 2. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. Wie hier beschrieben, sollten alle Bedingungen für eine TLS encryption erfüllt sein. jlagendijk (Jesse) June 2, 2022, 10:04am 1. 0p6. 2. 1 does not exist. You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. service - Checkmk agent controller daemonIt seams you use a Debian system. If you use the bakery, the agent was baked with enabled cmk-agent-ctl. 1. mydomain. socket --now Issue the following command to register the host with your Checkmk server. 489987 +01:00] INFO [cmk_agent_ctl] srclib. The registration works. It seams you use a Debian system. I have the server up and running and ~50 VMs online, all is working well. Release notes. Danach erfolgte die Registrierung und der Update Befehl. Troubleshooting. 1. " Jun 17 10:57:15 nc systemd[1]: cmk-agent-ctl-daemon. 489987 +01:00] INFO [cmk_agent_ctl] srclib. 2. Bei der Registrierung wurde in den Anleitungen von chekmk mit dem “automation” User gearbeitet, ich habe es mit dem cmkadmin gemacht was bei den. tsi: Getting target agent configuration for host ‘localhost’ from deployment serverHi, looking for a windows variable to use to automate agent registration for 200+ hosts that queries hosts in “lowercase” as opposed to “uppercase” (yes our hosts are configured in lower case in Checkmk)So please stop and disable the services for the new agent controller: systemctl stop cmk-agent-ctl-daemon. , I had to put the public hostname). exe' register -s checkmk. 1. 1. 0 onwards), you have to add the following rights (internal name "general. example. 1. worked fine for me. gerhards. Alle Hosts angelegt mit Hostname und IP Adresse. 1. Here is the deep link to the section in the manual:. 6 I have an external cloud host that I would like to monitor with in-house CMK server. ERROR [cmk_agent_ctl] Failed to run as user 'cmk-agent'. 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. TLD -i SITE-NAME -U USERNAME. apt remove --purge check-mk-agent dpkg -i check-mk-agent_2. Install went fine. exe register --trust-cert --hostname mein. 0) master 1. 1 Like. 16-150300. Did not fix it. 1 agent. 0p20 Debian 11. domain. service systemctl disable cmk-agent-ctl-daemon. 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. " Jun 17 10:57:15 nc systemd[1]: cmk-agent-ctl-daemon. Hello David, unfortunately --trust-cert changes nothing. Wie Sie den Agenten nutzen, erfahren Sie hier. Der für die verschlüsselte Kommunikation mit dem Checkmk-Server zuständige Agent Controller cmk-agent-ctl. sh script. I installed the CheckMK Agent on a TrueNAS SCALE host. : checkmk:~# systemctl status cmk-agent-ctl-daemon. (We used cmk-agent-ctl proxy-register → deploy json to host → cmk-agent-ctl import . You can analyze this by having a look at the server’s certificate chain. 0 adds the Agent Controller and new features to the agent program. Redirecting to /bin/systemctl reload xinetd. DEBUG [cmk_agent_ctl::modes::pull] handle_request starts DEBUG [rustls::server::hs] decided upon suite TLS13_AES_256_GCM_SHA384 WARN [rustls::conn] Sending fatal alert HandshakeFailure DEBUG [cmk_agent_ctl::modes::renew_certificate] Checking registered connections for certificate expiry. You can learn how to use the agent here. deb Now the cmk-agent-ctl-daemon. 14 --site burana_modena --user automation -. de--site meine_site --user user --password password --hostname mein-host. Reload check_mk configuration using below command –. deb. We’ll come back to you to ask for. check_für das Abfragen von Webseiten. exe register --hostname xxx --server checkmk:8000 --site monitoring --user automation --password xxx That seemed to have worked great thanks “jwiederh”. exe register --trust-cert -vv” command: [2023-02-10 12:54:18. We strongly recommend to enable TLS by registering the host to the site (using the cmk-agent-ctl register command on the monitored host). I’m running 2. Hello, I have a problem with enabling TLS in CheckMk 2. no login shell, and is used only for data transfer. com--site FOO --user BAR --password FOO The new agents at 2. d, only the check-mk-agent can be found: [root@jumphost]# cmk-agent-ctl register --hostname myclient . 1 server? You have to run the cmk-agent-ctl on the machine running the agent, not from the server. 02. 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. Anschließend installieren Sie den Agenten mit allen Konfigurationsdetails für den zu überwachenden Host durch einen abschließenden Aufruf des Agent-Updater-Plugins. mschlenker (Mattias. I am trying to add new servers with: amnesiac ≫ [ 10:47:25 ] ≫ ~ $ cmk-agent-ctl register-new --server. Monthly Promotions Product Specials and Monthly Flyers Emailed Right to You! Online Ordering Check Price and. g. CMK version:2. I had to add the checkmk user again. deb Now the cmk-agent-ctl-daemon. socket failed. If it is xinetd remove the Xinetd config file for the Checkmk agent and just reinstall the agent package. CMK version: 2. 1 Like. 0. DOMAIN. What I already tried: I tried only listening on ports 80 and 443 for caddy, with{"serverDuration": 18, "requestCorrelationId": "a42ce0e7c5a94b2c8eb93184953f1289"} Checkmk Knowledge Base {"serverDuration": 18, "requestCorrelationId. root@kerneltalks # service xinetd reload.