0 2. We’ll come back to you to ask for. mschlenker (Mattias Schlenker) May 30, 2022, 6:11pm 4. All commands to be executed on the host to be monitored. socket systemctl status cmk-agent-ctl-daemon. 0-1_all. ). 0. If it is not that, double-check your TLS registration process per our official guide: Monitoring Linux - The new agent for Linux in detail. 488899 +01:00] INFO [cmk_agent_ctl] srcmain. Could you please check who is claiming port 6556? ss -tulpn | grep 6556 This should be cmk-agent-ctl in daemon mode. I had to add the checkmk user. I’m running 2. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. Caused by: 0: Failed to set group id 998 corresponding to user cmk-agent 1: EPERM: Operation not permitted However, when I run the command using sudo, I end up with the following output. 0p15. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. You have to use cmk-agent-ctl. 0p19 CRE OS version: Debian 11. socket --now Issue the following command to register the host with your Checkmk server. If the host is monitored by multiple sites, you must register to all of them. rs:14: starting [2023-02-10 12:54:18. The cmk-agent user was sucessfully created. consorzioburana. The agent control use the port 8000 for communication. 0. Upon first try, “cmk-agent-ctl register. 04 LTS. The Windows agent. 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. B. Monthly Promotions Product Specials and Monthly Flyers Emailed Right to You! Online Ordering Check Price and. echo y|sudo cmk-agent-ctl register --hostname vmansible01 –server vmcheckmk01. 1. This is in preparation for the 2. However if I (faulty) try to register the host to my MAIN site first and THEN register to my slave site it works… The --hostname option of the register command refers to the host to be registered. 1. Thanks for having a look. 2. The Agent Receiver tells the Agent Controller. The agent control use the port 8000 for communication. Are you trying to register the 2. We tried setting a firewall rule to the port 8000, we tried using the automation user, the checkmk_admin user, and a random admin user. rs:29: No connection could be made because the target. New install of CMK (via RPM) - trying to just register the localhost agent. Waren die angegebenen Werte korrekt, werden Sie aufgefordert, die Identität der Checkmk-Instanz zu bestätigen, zu der Sie die Verbindung herstellen wollen. I am trying to register an agent installed on a Windows Server 2019. d, only the check-mk-agent can be found: [root@jumphost]# cmk-agent-ctl register --hostname myclient . If the host is monitored by multiple sites, you must register to all of them. apt remove --purge check-mk-agent dpkg -i check-mk-agent_2. 0-1_all. My server proxmox follow the guide from checkmk, where create the user, policy, open port 6556, special agent. 1 does not exist. 0 onwards), you have to add the following rights (internal name “general. 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. The hostname “localhost” was wrong. If I try to register it with the command: cmk-agent-ctl register --detect-proxy --hostname FOO --server bla. 0 adds the Agent Controller and new features to the agent script. The controller is executed under the cmk-agent user, which has limited privileges, e. 1 does not exist. 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. OS: linux. The registration is done using the Agent Controller cmk-agent-ctl, which provides a command interface for configuring the connections. OK, please also stop cmk-agent-ctl-daemon. Die Registrierung der Agents in der Version 2. The cmk-agent user was sucessfully created. 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 --now $ sudo systemctl restart check-mk-agent. This is the reason: (sorry, article is currently in translation)You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. If you use the bakery, the agent was baked with enabled cmk-agent-ctl. 0:8282 --site cmk --user automation --password. The additional port 8000 seems necessary for creating TLS connection. g. service Ikkarus13 (Sascha Kunimünch) May 25, 2022, 1:18pm. I created the folder manually and changed ownership, and now the registration. This can be problematic if you are monitoring the same host from a site running Checkmk version 2. You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. 0p20 Ubuntu 20. If the Agent Receiver accepts the request,. socket systemctl disable cmk-agent-ctl-daemon. exe" ^ register ^ --hostname mynewhost ^ -. secret with the password as String. 5. com. In your case doing proxy. 1. I had to add the checkmk user again. de:8000 --site mon --user admin. The client must set the version 0 for the CSRThe 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). You’ll also need to do something like cmk-agent-ctl register. After installation the check_mk_agent service should have started automatically. If I try to register it with the command: cmk-agent-ctl register --detect-proxy --hostname FOO --server bla. domain. Der Benutzer cmk-agent wird während der Installation des Agentenpakets. Sehr beliebt ist z. 1. 10. 2. 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. deb. Dear friends of Checkmk, the new stable release 2. 0. 1. 0. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. TLD -i SITE-NAME -U USERNAME. 0/26. service You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. Yes, it might seem weird. 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. 2 system. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. As suggested in another post i read i checked:-that port 8000 is open-omd config show | grep AGENT_RECEIVER show port 8000The registration then aborts, since we cannot continue without knowing the correct port. 1. de --server monitor. 2. For Debian remove the cmk-agent and purge the configuration, than reinstall the agent, this purges the xinetd configuration. Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins) sudo: cmk: command not found. 0. Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins) sudo: cmk: command not found. deb Now the cmk-agent-ctl-daemon. Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins) sudo: cmk: command not found. I installed the CheckMK Agent on a TrueNAS SCALE host. But if cmk-agent-ctl cannot be started, access fails. Could you please check who is claiming port 6556?. 2. Ultimately, Checkmk was showing the agents were not registered because they were not in fact registered. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. Reload check_mk configuration using below command –. This might be a bug. gierse,. But if cmk-agent-ctl cannot be started, access fails. sh script. This topic was automatically closed 365 days after the last reply. no login shell, and is used only for data transfer. com. no login shell, and is used only for data transfer. It’s hard to tell where exactly it comes from. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. B. 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. The controller is executed under the cmk-agent user, which has limited privileges, e. exe greift auf ihn zu. CMK version: 2. local -i home -U cmkadmin ERROR [cmk_agent_ctl] Failed to discover agent receiver port from Checkmk REST API, both with and Registration indeed is good. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. 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. XXX. service - Checkmk agent controller daemonIt seams you use a Debian system. cee Ubuntu 16. check_für das Abfragen von Webseiten. 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”). exe register --trust-cert --hostname mein. 1. exe' register -s checkmk. The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. 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”). 1. During registration, the agent controller (cmk-agent-ctl) queries the port on which the agent receiver is listening from the Checkmk REST API, unless the port has been explicitly provided on the command line. Version: 2. 02. We strongly recommend to enable TLS by registering the host to the site (using the cmk-agent-ctl register command on the monitored host). 02. 0. 0. 0 2. I am trying to register an agent installed on a Windows Server 2019. cre root@9529f647cd27:/# omd sites SITE VERSION COMMENTS cmk 2. raptorswithhats. The Windows agent of Checkmk version 2. 0 OS Version: Appliance 1. Open the terminal that you want to monitor on your. I installed the CheckMK Agent on a TrueNAS SCALE host. Please provide me with the output of: systemctl status check-mk-agent. And with the CMC: OMD [mysite]:~$ cmk -O. 2. For Debian remove the cmk-agent and purge the configuration, than reinstall the agent, this purges the xinetd configuration. socket failed. Now the service is active and listening. 0p15. 0. 1. deb Monitored System (Host): Checkmk Agent version: 2. - it goes from CRIT → OK after a while or sometimes message comes with with service. The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. 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. 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. 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. If the host is monitored by multiple sites, you must register to. I’m running 2. Hi everyone, below is the output of the “cmk-agent-ctl. For example, the registration crashed with "500 Internal Server Error" for users without the permission "Write access to all hosts and folders". Sie können sich mit. mit cmk-agent-ctl help. 0) master 1. Ich registriere den Agent : sudo cmk-agent-ctl register --hostname hlcmk --server 10. Version: 2. But before we start with the actual. But nothing worked. 0p9. Hosts, services and agents. 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. exe” register. service should work as expected. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. 1. You have three options here: Make the REST API call work. 0p4, OS: linux, TLS is not activated on monitored host (see details) Looking in the documentation with the new agent I knew I had to register him with cmk-agent-ctl register. 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…. redacted. Unfortunately, the problem remains: C:\WINDOWS\system32>"C:\Program Files (x86)\checkmk\service\cmk-agent-ctl. You can learn how to use the agent here. py script to the host to be monitored (both can be found at ~/share/check_mk/agents/plugins on the Checkmk server). 0. 1 sec. g. CMK 2. 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. The controller is executed under the cmk-agent user, which has limited privileges, e. Tested turning off firewall on 2019. 1. I had to add the checkmk user again. TLD -i SITE-NAME -U USERNAME This worked perfectly fine in CMK 2. It has to match the actual hostname used by the Checkmk server, found under “Setup” > “Hosts”. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. sh script. 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. 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. Without register, the communication will handle also via port 8000, so you need to clarify if this port is open. 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). sh script. sh script. 5. 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. 1. Agent Victoria, British Columbia 1970's Members Murray Acton ~ Guitar, Vocals Steve Andreas ~ Bass, Vocals Peter Bryant ~ Drums, Vocals Wayne Darling ~. Dann hast du die Herangehensweise schon gefunden, wenn man die Zertifikate noch nicht im Griff hat. 57. After a reboot the cmk-agent-ctl-daemon and the check-mk-agent. 4:8000 --site cmk --user cmkadmin --password password Here I still have the above issue… (and I only can use IP addresses no DNS names). 0. The cmk-agent user is created during the installation of the agent. After the installation everything worked. 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. The agents' Agent Controller makes a request for registration to the server’s Agent Receiver, transmitting the data required to create the host. Nun wird der Service „CheckMK Agent“ – Service mit Warning angezeigt und es liegt wohl daran. I’m running 2. d, only the check-mk-agent can be found: [root@jumphost]# cmk-agent-ctl register --hostname myclient \. 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. 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. 0. 0p12. 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. cmk-agent-ctl register -v -H HOSTNAME -P 'PASSWORD' -s SUBDOMAIN. hardware:~#] cmk-agent-ctl. Any hints? aeckstein (Andre Eckstein) October 25, 2022, 4:36pm 4. After the installation everything worked. 1. en. 0p17. I get a return with value: 16 The web test connection has a successfull ping but the agent. This worked perfectly fine in CMK 2. /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. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. exe' register -s checkmk. 0. 1. 04. We will be asked for some information about the host. I want to enable global registration via Hostname for other agents too, so I’ve enabled a nginx-reverseproxy with following settings:Yes I did use the” cmk-agent-ctl register command, after that I got this message. 0p10 OS: linux The hosts agent supports TLS, but it is not being used. WalterH (Walter Hofstädtler) May 30, 2022, 5:42pm 31. 0p6. Checkmk. 1. socket failed. exe register --hostname HOST --server SERVER: 8001 --site SITE --user USER. 2. ColinP November 12, 2022, 12:44pm 1. I installed the CheckMK Agent on a TrueNAS SCALE host. 04 - CMK RAW) where communication with the agent keeps giving errors "[agent] Communication failed: [Errno 104] Connection reset by peer - Got no information from host - execution time 0. com:8000/cmk. Installing an agent and starting monitoring was straightforward - everything happens over SSH. Either import the self signed certificate on this server paperless-ngx or use the same command with port. 1 Like. no login shell, and is used only for data transfer. New replies are no longer allowed. 02. worked fine for me. @SeyRyuu I have potential good news for you, then… I resolved this yesterday . I am also running Puppet so automation is a thing. 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’am new to checkmk and trying to configure the agent but getting the same message, i couldn’t understand why. To register a host, users need the following permissions: Agent pairing. Added new host in CMK. 1. XXX. service. If the server you want to monitor and register is the monitoring docker. I had to add the checkmk user again. mydomain. Monitoring Linux - The new agent for Linux in detail. However, there is a difference between console output of “cmk-agent-ctl status” and “cmk_agent_ctl_status” from agent output (downloaded via “Download. exe . 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. 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. Please execute with sufficient permissions (maybe try 'sudo'). slice (loaded active) and check_mk. DOMAIN. CMK version: 2. exe – register --trust-cert’ USAGE: cmk-agent-ctl. 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. Agent pairing; Read access to all hosts and folders; Write access to all hosts and folders; regards. exe register --hostname xxx --server checkmk:8000 --site monitoring --user automation --password xxx That seemed to have worked great thanks “jwiederh”. 0p9. Hello. I get this with no port, or port 800 and 8001. OS version: Rocky Linux release 9. slice (loaded active) and check_mk. 1. Since the machine you’re trying to monitor is still 2. Hi @P. consorzioburana. ” 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. apt remove --purge check-mk-agent dpkg -i check-mk-agent_2. 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. Hi @robin. Danach erfolgte die Registrierung und der Update Befehl. (We used cmk-agent-ctl proxy-register → deploy json to host → cmk-agent-ctl import . cmk-update-agent register -v -H COMPUTERNAME -U register -S xxxxxxxxxxxxxxxxx. Now you need to register the agnet for TLS handshake. 1 agent. OS version: Ubuntu Server 22. 0) master 1. root@kerneltalks # service xinetd reload. Anders (Anders) November 27, 2022, 4:25pm 1 CMK version: 2. This query is attempted both with and both queries fail, the controller aborts, otherwise, the result of the first sucessful query is. 0 adds the Agent Controller and new features to the agent script. Welcome to the Checkmk User Guide. The controller is executed under the cmk-agent user, which has limited privileges, e. apt remove --purge check-mk-agent dpkg -i check-mk-agent_2. NOTE: A registered host will refuse all unencrypted connections. 02. 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. 02. I installed the CheckMK Agent on a TrueNAS SCALE host. 2 system. If you want to use the agent in legacy mode, you need to disable cmk-agent-ctl in bakery rules. Hello. 0. apt remove --purge check-mk-agent dpkg -i check-mk-agent_2. 0. rs:14: starting [2023-02-10 12:54:18. 1 using the Agent Controller. exe register --trust-cert -vv” command: [2023-02-10 12:54:18. But if cmk-agent-ctl cannot be started, access fails. New replies are no longer allowed. Hi, Some days ago i was testing this software, do a few tests and lately installed on a VM runing linux mint 20. 4. it --server 192. CMK version: 2. 168. This might be a bug. 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). check_für das Abfragen von Webseiten. 0. OS version: TrueNAS SCALE 22. mit cmk-agent-ctl help register. 0. The cmk-agent user was sucessfully created. Ok, so the user I’m using to do the agent registration.