This can be problematic if you are monitoring the same host from a site running Checkmk version 2. The Agent Receiver tells the Agent Controller. 2. 1. omd update. 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. 0. socket failed. com--site FOO --user BAR -. 02. 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. 1. cmk-agent-ctl register --hostname app-a. 1. Das funktioniert. 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. 0. 2. exe – register --trust-cert’ USAGE: cmk-agent-ctl. In your case doing proxy. Upon first try, “cmk-agent-ctl register. CMK 2. 0 2. CMK 2. So, Checkmk is ready. Hello. domain. 1 Like. If the server you want to monitor and register is the monitoring docker. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. You can learn how to use the agent here. But before we start with the actual. service: Scheduled restart job, restart counter is at 2. You can analyze this by having a look at the server’s certificate chain. The controller is executed under the cmk-agent user, which has limited privileges, e. 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. 1. But nothing worked. 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. 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. cmk-update-agent –v. 0-1_all. check_mk agent runs on top of xinetd service in Linux. Created symlink /etc/systemd/system/sockets. My server proxmox follow the guide from checkmk, where create the user, policy, open port 6556, special agent. 0 2. Just in case: We are prepared for cases where the agent controller cannot be started or. cmk-agent-ctl register --server cmkserver:443 --trust-cert --site cmksite --user username --password password --hostname monitoringhost On Debian 11 if got the following outputYes I did use the” cmk-agent-ctl register command, after that I got this message. exe” ^. 57. If I try to register it with the command: cmk-agent-ctl register --detect-proxy --hostname FOO --server bla. DOMAIN. Sie können sich mit cmk-agent-ctl help die Kommandohilfe anzeigen lassen, auch spezifisch für die verfügbaren Subkommandos, z. This might be a bug. 0 Agent socket: inoperational (!!)The agent control use the port 8000 for communication. 488899 +01:00] INFO [cmk_agent_ctl] srcmain. After a reboot the cmk-agent-ctl-daemon and the check-mk-agent. 1. Agent Updater (Agentenbäckerei), Discovery des Agent Controller Ports, mit Transportverschlüsselung. 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. The Agent Controller cmk-agent-ctl is the component within the agent that is responsible for transporting the data collected by the agent script. 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. rs:41: Loaded config from. 2 Delete all directories/files of the agent controller from the host. Bei der Registrierung wurde in den Anleitungen von chekmk mit dem “automation” User gearbeitet, ich habe es mit dem cmkadmin gemacht was bei den. Der Linux-Agent der Checkmk-Version 2. The hosts agent supports TLS, but it is not being used. 0. Open the terminal that you want to monitor on your Linux server. You can learn how to use the agent here. –server checkmk. Yes I did use the” cmk-agent-ctl register command, after that I got this message. net -i STAR -P 'XXXXX' -U automation -H sys-vbr02Output 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. 0 onwards), you have to add the following rights (internal name "general. service: Scheduled restart job, restart counter is at 2. New install of CMK (via RPM) - trying to just register the localhost agent. If I try to register it with the command: cmk-agent-ctl register --detect-proxy --hostname FOO --server bla. The user used for registering has admin privileges at checkmk and is able to see the global setting at the webui. XXX. com--site FOO --user BAR -. OS is Ubuntu 22. The cmk-agent user is created during the installation of the agent. The cmk-agent user is created during the installation of the agent. If you use the bakery, the agent was baked with enabled cmk-agent-ctl. I created the folder manually and changed ownership, and now the registration. service: Scheduled restart job, restart counter is at 2. 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. OS version: TrueNAS SCALE 22. I get this with no port, or port 800 and 8001. 5. The cmk-agent user is created during the installation of the agent. This might be a bug. 1. If I try to register it with the command: cmk-agent-ctl register --detect-proxy --hostname FOO --server bla. 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. 1. , I had to put the public hostname). gerhards. In the following Monitoring agents box, you specify two important options for the auto-registration. You can confirm this by telnetting from your OMD site to the monitored server on tcp port 6556:Checkmk Enterprise Edition 2. You’ll also need to do something like cmk-agent-ctl register. You have to use cmk-agent-ctl. Monitoring Linux - The new agent for Linux in detail. exe' register -s checkmk. Einen auf den Server auf der Docker Service läuft (OpenSuse Tumbleweed), sowie einen Windows Server 2016. The agents' Agent Controller makes a request for registration to the server’s Agent Receiver, transmitting the data required to create the host. mydomain. If it is xinetd remove the. TLD -i SITE-NAME -U USERNAME. exe' register -s checkmk. service: Scheduled restart job, restart counter is at 2. keine Login-Shell hat und nur zur Datenübertragung genutzt wird. With that flag added the machine registers just fine. The cmk-agent user is created during the installation of the agent. de --site monitoring --user cmkadmin. andreas-doehler (Andreas) January 8, 2023, 3:48pm 2. 0. B. For more information try --help Command for registration. 1. 1. Hello. Server certificate details: [2022-06-01. Hello David, unfortunately --trust-cert changes nothing. 0. g. via journalctl -u cmk-agent-ctl-daemon. cmk-agent-ctl delete-all --enable-insecure-connections; cmk-agent-ctl status; cmk-agent-ctl register --hostname $(hostname -f) --server checkmk21-prod. 2. root@waw1-monitor2:/omd# cmk-update-agent -v. It has to match the actual hostname used by the Checkmk server, found under “Setup” > “Hosts”. 0b4_0 raw OS: Ubuntu 20. socket systemctl status cmk-agent-ctl-daemon. 0p23 of Checkmk is ready for download. This can be problematic if you are monitoring the same host from a site running Checkmk version 2. Here is the deep link to the section in the manual:. de--site meine_site --user user --password password --hostname mein-host. If the Agent Receiver accepts the request,. $ cmk-update-agent register $ cmk-agent-ctl register. Sie können sich mit cmk-agent-ctl help die Kommandohilfe anzeigen lassen, auch spezifisch für die verfügbaren Subkommandos, z. If there are leftovers from 2. exe register --hostname HOST --server SERVER: 8001 --site SITE --user USER. 0p25. 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. socket systemctl status cmk-agent-ctl-daemon. You’ll also need to do something like cmk-agent-ctl register. g. 1 sec. 1. I installed the CheckMK Agent on a TrueNAS SCALE host. ” failed with this error: "Request failed with code 500 Internal Server Error: Internal Server Error"The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. 1 gave 404 Not Found: Host 127. 2 system. The cmk-agent user was sucessfully created. 107:8000 --site home -U cmkadmin ERROR [cmk_agent_ctl… One of my hosts is producing this error, while most others register fine: root@sshgateway:~# cmk-agent. socket (failed failed) so I stopped and disabled them, then did systemctl daemon-reload and systemctl. CMK version: 2. But if cmk-agent-ctl cannot be started, access fails. In case it is left out, the agent controller tries to query the port from the REST API. to switch your agent into SSL mode (and not. 1 the monitoring data sent from the monitored host to the monitoring server is TLS encrypted and compressed by default. 0. windows. 0p15. gawainsr2 August 15, 2022, 5:52pm 1. –hostname WindowsServer ^. Bis einschließlich b2 war es so, dass der cmk-agent-ctl NICHT am Socket lauscht, solange er nicht für die TLS Verbindung registriert ist. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. NOTE: A registered host will refuse all unencrypted connections. no login shell, and is used only for data transfer. The controller is executed under the cmk-agent user, which has limited privileges, e. 234. The controller is executed under the cmk-agent user, which has limited privileges, e. 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. The registration works. Sehr beliebt ist z. check_für das Abfragen von Webseiten. wants/check-mk-agent. New replies are no longer allowed. 0p6. In checkmk for the host service got below warning. As suggested in another post i read i checked:-that port 8000 is open-omd config show | grep AGENT_RECEIVER show port 8000cmk-agent-ctl register --server cmkserver:443 --trust-cert --site cmksite --user username --password password --hostname monitoringhost On Debian 11 if got the following outputCMK version: 2. Could you please check who is claiming port 6556?. local --server 10. I’m running 2. local:8000 -s checkmk. The cmk-agent user was sucessfully created. ╰─$ sudo cmk-agent-ctl status Version: 2. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. CMK version: 2. 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. Linux: cmk-agent-ctl register --server meinserver. deb Now the cmk-agent-ctl-daemon. cmk-agent-ctl register --hostname myhost --server checkmk. 0p2 RAW Edition. I created the folder manually and changed ownership, and now the registration. exe register --trust-cert --hostname mein. For this, I’m running following command on client # cmk-agent-ctl register --hostname `hostname -f` --server mon. Without register, the communication will handle also via port 8000, so you need to clarify if this port is open. After the installation everything worked. sh script. py script to the host to be monitored (both can be found at ~/share/check_mk/agents/plugins on the Checkmk server). Checkmk. If I try to register it with the command: cmk-agent-ctl register --detect-proxy --hostname FOO --server bla. 488899 +01:00] INFO [cmk_agent_ctl] srcmain. 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”). to switch your agent into SSL mode (and not legacy mode), but that’s a different subject. Version: 2. 1:8655 --site cmk --user cmk_admin. 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. 1 i’m trying to automate the process of registering our updated windows hosts to thee monitoring for tls encryption. p3 OS version: CentOS 8. gerhards. Copy the cmk-update-agent binary or the cmk_update_agent. This worked perfectly fine in CMK 2. Added new host in CMK. 1. The cmk-agent user was sucessfully created. I installed the CheckMK Agent on a TrueNAS SCALE host. Reload check_mk configuration using below command –. 1. From its very beginning, monitoring Windows servers has been one of the most important tasks performed by Checkmk. check_mk agent runs on top of xinetd service in Linux. C:\ProgramData\checkmk\agent\config\cas\all_certs. I created the folder manually and changed ownership, and now the registration is working! ERROR [cmk_agent_ctl] Something seems wrong with the agent socket (/run/check-mk-agent. en. evilguy January 8, 2023, 7:53pm 3. local -i home -U cmkadmin ERROR [cmk_agent_ctl] Failed to discover agent receiver port from Checkmk REST API, both. 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. This query is attempted both with and both queries fail, the controller aborts, otherwise, the result of the first sucessful query is. The new TLS feature is need to register with cmk-agent-ctl register command. cee Ubuntu 16. 1. If the host is monitored by multiple sites, you must. When you have done all this, install the agent again and it will work properly. 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. Jun 17 10:57:15 nc systemd[1]: cmk-agent-ctl-daemon. c:2633). 1. 1 Like. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. The challenge is registering an agent, i. This can be problematic if you are monitoring the same host from a site running Checkmk 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. And now. 0p11 Agent socket: inoperational (!!) Version: 2. 488899 +01:00] INFO [cmk_agent_ctl] srcmain. Please provide me with the output of: systemctl status check-mk-agent. I’m using CMK 2. service: Scheduled restart job, restart counter is at 2. socket. If you use the bakery, the agent was baked with enabled cmk-agent-ctl. exe' register -s checkmk. g. But if cmk-agent-ctl cannot be started, access fails. 0 2. 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. 1. 0 then you will find the systemd unit files. Here you can enter a host’s name simply in order to view the host’s configuration (e. The cmk-agent user is created during the installation of the agent. You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. Home ; Categories ;Registration indeed is good. exe . For a user to be able to do the cmk-agent-ctl register, which is needed to enable the TLS encryption (available from 2. @SeyRyuu I have potential good news for you, then… I resolved this yesterday . Now you need to register the agnet for TLS handshake. rs:14: starting [2023-02-10 12:54:18. This topic was automatically closed 365 days after the last reply. copy the cmk-agent-ctl for the architecture you are using to e. cmk -N myserver123 ). What I already tried: I tried only listening on ports 80 and 443 for caddy, with {"serverDuration": 24, "requestCorrelationId": "464b55cee9f74460a402ac4a40d2b489"} Checkmk Knowledge Base {"serverDuration": 18, "requestCorrelationId. Monthly Promotions Product Specials and Monthly Flyers Emailed Right to You! Online Ordering Check Price and. rs:14: starting [2023-02-10 12:54:18. g. Welcome to the Checkmk User Guide. 0. Please provide me with the output of:. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. The server and the host are on the same network, the same virtualization cluster. The agent control use the port 8000 for communication. echo y|sudo cmk-agent-ctl register --hostname vmansible01 –server vmcheckmk01. 7 I have problem since the connection to the cmk server has to be ssl encrypted. 2. Checkmk Enterprise Edition 2. 0p10 OS: linux The hosts agent supports TLS, but it is not being used. „TLS is not activated on monitored host (see details)“. 0. 1. " Jun 17 10:57:15 nc systemd[1]: cmk-agent-ctl-daemon. Did not fix it. XXX. „TLS is not activated on monitored host (see details)“. (We used cmk-agent-ctl proxy-register → deploy json to host → cmk-agent-ctl import . 1 Like. service should work as expected. If you use the bakery, the agent was baked with enabled cmk-agent-ctl. systemctl stop cmk-agent-ctl-daemon. 0 adds the Agent Controller and new features to the agent script. 168. serviceThis is a bug of the client cmk-agent-ctl. In your case doing proxy. cfg. TLD -i SITE-NAME -U USERNAME This worked perfectly fine in CMK 2. Version: 2. folgenden Register Befehl benutzt. But if cmk-agent-ctl cannot be started, access fails. The controller is executed under the cmk-agent user, which has limited privileges, e. Another gotcha I came across was trying to run the register, make sure you are using admin cmd ( which you are ), then cut and paste the command in full : “C:Program Files (x86)checkmkservicecmk-agent-ctl. This is a bug of the client cmk-agent-ctl. agent_pairing") to their role. 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. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. B. I had to add the checkmk user again. Jun 17 10:57:15 nc systemd[1]: cmk-agent-ctl-daemon. example. 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. Distribute below files from new baked agent to all agents that were baked with expired certificate. no login shell, and is used only for data transfer. 1 Like. But if cmk-agent-ctl cannot be started, access fails. CMK Version: 2. I am trying to register an agent installed on a Windows Server 2019. After the installation everything worked. slice (loaded active) and check_mk. 1. 1. 0. Baked and signed the agent. The Linux agent of Checkmk version 2. 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. B. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. 0. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. Also, from the command line of the CentOS 7 server I can fetch the login. 02. 2 Delete all directories/files of the agent controller from the host. The Agent Controller cmk-agent-ctl is the component within the agent that is responsible for transporting the data collected by the agent script. cmk-agent-ctl register -v -H HOSTNAME -P 'PASSWORD' -s SUBDOMAIN. The exact command line is this: cmk-agent-ctl register -v -H HOSTNAME -P 'PASSWORD' -s SUBDOMAIN. I am trying to register an agent installed on a Windows Server 2019. WalterH (Walter Hofstädtler) May 30, 2022, 5:42pm 31. Ping works, Agent reports Communication Failed: timed out. Ok, so the user I’m using to do the agent registration. net -i STAR -P 'XXXXX' -U automation -H sys-vbr02It seams you use a Debian system. In your case. I get a return with value: 16 The web test connection has a successfull ping but the agent. 1. 1. 1 does not exist. For a user to be able to do the cmk-agent-ctl register, which is needed to enable the TLS encryption (available from 2. In your case doing proxy. Registration indeed is good. Anders (Anders) November 27, 2022, 4:25pm 1 CMK version: 2. de:8000 --site mon --user admin. On all other hosts the cmk-agent-ctl-daemon fails and registration is not possible. You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. DOH I forgot I had set a custom port for agent receiver as i had a conflict for 8000 on my docker host. Now you need to register the agnet for TLS handshake. Jun 17 10:57:15 nc systemd[1]: cmk-agent-ctl-daemon. Yes I did use the” cmk-agent-ctl register command, after that I got this message.