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. cmk-agent-ctl register --server cmkserver:443 --trust-cert --site cmksite --user username --password password --hostname monitoringhost On Debian 11 if got the following outputTo 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. But if cmk-agent-ctl cannot be started, access fails. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. 0p15. 1. socket systemctl status cmk-agent-ctl-daemon. If the Agent Receiver accepts the request, registration is performed and a TLS-encrypted connection is established. 0, that will not be possible. Redirecting to /bin/systemctl reload xinetd. 0b4-1_all. exe register --hostname xxx --server checkmk:8000 --site monitoring --user automation --password xxx That seemed to have worked great thanks “jwiederh”. Segmentation fault (core dumped) The same result also with the all needed parameters for the registration. 0 OS Version: Appliance 1. Now you need to register the agnet for TLS handshake. I had to purge the client, reinstall and reboot the host to get the client to listen on port 6556. service systemctl stop check-mk-agent. The cmk-agent user is created during the installation of the agent. DOMAIN. OS version: Rocky Linux release 9. 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. The agents' Agent Controller makes a request for registration to the server’s Agent Receiver, transmitting the data required to create the host. CMK version: 2. 1. com--site FOO --user BAR -. TLD -i SITE-NAME -U USERNAME. The cmk-agent user is created during the installation of the agent. mschlenker (Mattias Schlenker) May 30, 2022, 6:11pm 4. OK, let’s figure out who is doing what. I’ve installed the agent and succesfully register on OS windows 7x64 and. 0. 0 2. com. Any hints? aeckstein (Andre Eckstein) October 25, 2022, 4:36pm 4. serviceThis is a bug of the client cmk-agent-ctl. 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. If you want to use the agent in legacy mode, you need to disable cmk-agent-ctl in bakery rules. 0. If you forward port 9800 to 8000 then you also have to use port 9800 in your register command. This might be a bug. 2 system. Tested adding both a firewall run on the 2019 server for both 6556 in and out. Just to. 1. socket failed. I am trying to register an agent installed on a Windows Server 2019. /root/bin and make sure that /root/bin is in the PATH and before /usr/bin_ install the checkmk agent deb; wait for a few seconds (sleep 5) cp /root/bin/cmk-agent-ctl /usr/bin/ systemctl start cmk-agent-ctl-daemon. The agent control use the port 8000 for communication. Please provide me with the output of: systemctl status check-mk-agent. 1. B. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. 6. 1 agent. root@kerneltalks # service xinetd reload. Checkmk Appliance Cluster. Yes I did use the” cmk-agent-ctl register command, after that I got this message. This can be problematic if you are monitoring the same host from a site running Checkmk version 2. 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 user used for registering has admin privileges at checkmk and is able to see the global setting at the webui. 1. You can learn how to use the agent here. Installing an agent and starting monitoring was straightforward - everything happens over SSH. CMK version: 2. I think the docs aren’t clear on what should be done if ss -tulpn | grep 6556 shows that systemd or xinetd are listening on 6556 instead of cmk-agent-ctl, and what one should do to have cmk-agent-ctl working. Host can telnet on port 8000 of the server and a curl request works. TLD -i SITE-NAME -U USERNAME This worked perfectly fine in CMK 2. $ sudo cmk-agent-ctl register --hostname localhost --server checkmk. cmk-agent-ctl register --hostname localhost --server server:8000 --site mysite --user cmkadmin -vv. Afterwards, port 6556 should be claimed by. 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. 2. On all other hosts the cmk-agent-ctl-daemon fails and registration is not possible. Distribute below files from new baked agent to all agents that were baked with expired certificate. ╰─$ sudo cmk-agent-ctl status Version: 2. 1. 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. socket systemctl disable cmk-agent-ctl-daemon. 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 Like. deb. jlagendijk (Jesse) June 2, 2022, 10:04am 1. 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. socket → /lib/systemd/system/check-mk-agent. Hello, I have a problem with enabling TLS in CheckMk 2. 04. 1. 0. How to Contact. 2. The cmk-agent user was sucessfully created. 1. service should work as expected. but here is everything ok. 0. 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. ). This query is attempted both with and both queries fail, the controller aborts, otherwise, the result of the first sucessful query is. 0b4-1 OS: Ubuntu 20. You can analyze this by having a look at the server’s certificate chain. 0-1_all. The agent control use the port 8000 for communication. Hi everybody, i’am new to checkmk and trying to configure the agent but getting the same message, i couldn’t understand why. From here click Create new host. C:Program Files (x86)checkmkservice>cmk-agent-ctl. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. - it goes from CRIT → OK after a while or sometimes message comes with with service. The cmk-agent user is created during the installation of the agent. On every host I register that way I don’t get any agent data because of the Issue Host is registe. example. DOMAIN. CMK version:2. After installation the check_mk_agent service should have started automatically. But nothing worked. deb Monitored System (Host): Checkmk Agent version: 2. Bulk Consent Manager. This might be a bug. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. Redirecting to /bin/systemctl reload xinetd. Thanks for having a look. omd start. 0. It’s hard to tell where exactly it comes from. CMK version: 2. cmk-agent-ctl. g. The controller is executed under the cmk-agent user, which has limited privileges, e. Unfortunately, the problem remains: C:\WINDOWS\system32>"C:\Program Files (x86)\checkmk\service\cmk-agent-ctl. 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). My server proxmox follow the guide from checkmk, where create the user, policy, open port 6556, special agent. 0. We strongly recommend to enable TLS by registering the host to the site (using the `cmk-agent-ctl register`. Bis einschließlich b2 war es so, dass der cmk-agent-ctl NICHT am Socket lauscht, solange er nicht für die TLS Verbindung registriert ist. 0p11 on Debian 11. OK, please also stop cmk-agent-ctl-daemon. Hi everyone, below is the output of the “cmk-agent-ctl. 2. 2. 2 system. You’ll also need to do something like cmk-agent-ctl register. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. For Debian remove the cmk-agent and purge the configuration, than reinstall the agent, this purges the xinetd configuration. service: Scheduled restart job, restart counter is at 2. 0p17. 0. 1. 0p25. com--site FOO --user BAR -. 1 server? You have to run the cmk-agent-ctl on the machine running the agent, not from the server. Run communication test. exe register --hostname HOST --server SERVER: 8001 --site SITE --user USER. Checkmk Raw Edition 2. net -i STAR -P 'XXXXX' -U automation -H sys-vbr02Registration indeed is good. cmk-agent-ctl delete-all --enable-insecure-connections; cmk-agent-ctl status; cmk-agent-ctl register --hostname $(hostname -f) --server checkmk21-prod. com:443 -i cmk --user automation . 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. 1. Hosts, services and agents. 488899 +01:00] INFO [cmk_agent_ctl] srcmain. 0 adds the Agent Controller and new features to the agent script. exe register --trust-cert -vv” command: [2023-02-10 12:54:18. Registration indeed is good. 1. service systemctl disable check-mk-agent. Back on server, Add server under hosts. 0p10 OS: linux The hosts agent supports TLS, but it is not being used. exe register --hostname HOST --server SERVER: 8001 --site SITE --user USER. Now you need to register the agnet for TLS handshake. OS version: TrueNAS SCALE 22. Copy the cmk-update-agent binary or the cmk_update_agent. 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. B. You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. 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. (We used cmk-agent-ctl proxy-register → deploy json to host → cmk-agent-ctl import . Die Registrierung der Agents in der Version 2. 57. So if you make any changes to the config file then you need to reload configuration or restart the agent. state. 1. 57. exe" status It also seems that you have multiple sites on your Checkmk server based on port 8001 in the response. com. 0. Register the host on the Checkmk server by invoking cmk-update-agent register. 1. 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. Bei einem Netzwerkdienst liegt es nahe, den Dienst über das Netzwerk abzufragen und über diesen Weg auch zu überwachen. Linux überwachen - Der neue Agent für Linux im Detail. 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). 04. 489987 +01:00] INFO [cmk_agent_ctl] srclib. 0 onwards), you have to add the following rights (internal name "general. Hi everyone, below is the output of the “cmk-agent-ctl. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. I think the docs aren’t clear on what should be done if ss -tulpn | grep 6556 shows that systemd or xinetd are listening on 6556 instead of cmk-agent-ctl, and what one should do to have cmk-agent-ctl working. (We used cmk-agent-ctl proxy-register → deploy json to host → cmk-agent-ctl import . I get this with no port, or port 800 and 8001. net -i STAR -P 'XXXXX' -U automation -H sys-vbr02It seams you use a Debian system. OS version: TrueNAS SCALE 22. The controller is executed under the cmk-agent user, which has limited privileges, e. Checkmk. 04. 1. In your case doing proxy. 04 LTS. 04. 0p14 Agent socket: operational IP allowlist: 10. You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. I am trying to register an agent installed on a Windows Server 2019. 0 (Blue Onyx) [root@CHECKMK services]# cmk-agent-ctl. c:2633). Version: 2. service: Scheduled restart job, restart counter is at 2. Could you please check who is claiming port 6556? ss -tulpn | grep 6556 This should be cmk-agent-ctl in daemon mode. I am using the Raw edition of CheckMK for my (rather large) Hobbyist stuff. The cmk-agent user was sucessfully created. gerhards. In your case doing proxy. Tahnks a lot for your tip. exe register --trust-cert -vv” command: [2023-02-10 12:54:18. The Agent Controller cmk-agent-ctl is the component within the agent that is responsible for transporting the data collected by the agent script. Checkmk. 3. Dann hast du die Herangehensweise schon gefunden, wenn man die Zertifikate noch nicht im Griff hat. Troubleshooting. Checkmk Community Trouble after upgrading to 2. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. 0 onwards), you have to add the following rights (internal name "general. 1. system (system) Closed October 17, 2023, 5:42am. 2. 4. Die Seite habe ich auch schon gefunden aber wie gesagt so richtig verstanden bzw. socket Then restart your xinetd (or just reboot). Specify the correct port when calling the registration command. Hello. keine Login-Shell hat und nur zur Datenübertragung genutzt wird. 488899 +01:00] INFO [cmk_agent_ctl] srcmain. Das zu bestätigende Server-Zertifikat haben wir aus Gründen der. For example, the registration crashed with "500 Internal Server Error" for users without the permission "Write access to all hosts and folders". rs:41: Loaded config from. Bei der Registrierung der Agents ergibt sich bei beiden Server folgender Fehler: <HOST>:~ # cmk-agent-ctl register --hostname <HOSTNAME> --server 192. With that flag added the machine registers just fine. Can you verify this? You can use the following command for this, "C:Program Files (x86)checkmkservicecmk-agent-ctl. , I had to put the public hostname). Hi @robin. 0b4_0. Registered and installed a Let’s Encrypt certificate using certbot; I can now access the web UI without a problem using but after setting up the host I can’t install an agent using the following command: cmk-agent-ctl register -H -s monitoring. The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. 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. cmk-update-agent register -s monitor2 -i mysite -H monitor2 -U cmkadmin. This component is separate from the Agent Updater. Server certificate details: [2022-06-01. The registration works. exe' register -s checkmk. cmk-agent-ctl register -v -H HOSTNAME -P 'PASSWORD' -s SUBDOMAIN. 1 i’m trying to automate the process of registering our updated windows hosts to thee monitoring for tls encryption. OK, let’s figure out who is doing what. 0. It would be good if after you run the cmk-agent-ctl register you get a positive validation in the command output like OK or Registered! thanks for your support. 0. socket (failed failed) so I stopped and disabled them, then did systemctl daemon-reload and systemctl. 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. Contact an admin if you think this should be re-opened. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. 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. agent_pairing") to their role. 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)\checkmk\service\cmk-agent-ctl. After the installation everything worked. 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. 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. 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. Are the Linux systems affected by cmk-agent-ctl not starting using a IPv4 only setup?. OS: Windows Server 2019. For Debian remove the cmk-agent and purge the configuration, than reinstall the agent, this purges the xinetd configuration. Deutsch. $ sudo systemctl restart cmk-agent-ctl-daemon. The Agent Receiver tells the Agent Controller. The cmk-agent user was sucessfully created. The registration works. 1. Jun 17 10:57:15 nc systemd[1]: cmk-agent-ctl-daemon. All commands to be executed on the host to be monitored. socket systemctl status cmk-agent-ctl-daemon. 0-1_all. socket systemctl status cmk-agent-ctl-daemon. 168. exe” register. 0. The controller is executed under the cmk-agent user, which has limited privileges, e. 1. Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins) sudo: cmk: command not found. rs:29: No connection could be made because the target. 1. If you use the bakery, the agent was baked with enabled cmk-agent-ctl. 1. Upon first try, “cmk-agent-ctl register. We strongly recommend to enable TLS by registering the host to the site (using the cmk-agent-ctl register command on the monitored host). mydomain. 0. I accept the certificate. I am experiencing a problem with registering the agent: CMK version: 2. 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’m using CMK 2. The controller is executed under the cmk-agent user, which has limited privileges, e. serviceThe Agent Controller cmk-agent-ctl is the component within the agent that is responsible for transporting the data collected by the agent script. Bei einem Netzwerkdienst liegt es nahe, den Dienst über das Netzwerk abzufragen und über diesen Weg auch zu überwachen. This worked perfectly fine in CMK 2. 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. Diese werden auch als aktive Checks bezeichnet. The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. rs:14: starting [2023-02-10 12:54:18. 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. With telnet i can connect to the agent from the OMD server. OS version: Ubuntu Server. Now you need to register the agnet for TLS handshake. Im talking about the network proxy admin and/ o the admin of the client. 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. 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. 5. 0p13. 0. com--site FOO --user BAR --password FOO The new agents at 2. d/ there might be a residual configuration file called checkmk or similar. 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. copy the cmk-agent-ctl for the architecture you are using to e. 04 Command used for registration: cmk-agent-ctl. no login shell, and is used only for data transfer. 1. Distribute below files from new baked agent to all agents that were baked with expired certificate. But if cmk-agent-ctl cannot be started, access fails. 1. Monitoring Linux - The new agent for Linux in detail. 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. 0. mschlenker (Mattias. 8 KB But the monitoring is not able to query the host anymore: I can’t use the cmk-agent-ctl register command when my host resists on a slave site. You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. this is initiated by the cloud host contacting CMK server behind our office. 0p24 to 2. 1. Here is a fix that worked for me, in case anyone else runs into this. Der Benutzer cmk-agent wird während der Installation des Agentenpakets. Bulk Consent Manager. Registration indeed is good. 0 last week. socket systemctl status cmk-agent-ctl-daemon. 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. Checkmk Enterprise Edition 2. 0p9. raptorswithhats. omd update. 02. 0. 489987 +01:00] INFO [cmk_agent_ctl] srclib. no login shell, and is used only for data transfer. Going from one patch level to another one (like from p16 to p20) basically is: dpkg -i checkmk…new. 5. 1 gave 404 Not Found: Host 127. gerhards. To register a host, users need the following permissions: Agent pairing. p3 OS version: CentOS 8. 0b4_0 raw OS: Ubuntu 20. 1 gave 404 Not Found: Host 127. DOMAIN.