The Linux agent of Checkmk version 2. Sehr beliebt ist z. If you want to use the agent in legacy mode, you need to disable cmk-agent-ctl in bakery rules. 1. 0p9. You’ll also need to do something like cmk-agent-ctl register. 0. You’ll also need to do something like cmk-agent-ctl register. The Windows agent of Checkmk version 2. cfg. 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”). This is the command we used to register the agent: C:Windowssystem32> "C:Program Files (x86)checkmkservicecmk-agent-ctl. 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…. The Agent Receiver tells the Agent Controller. 5. Back on server, Add server under hosts. The server and the host are on the same network, the same virtualization cluster. When you have done all this, install the agent again and it will work properly. The new TLS feature is need to register with cmk-agent-ctl register command. 1 does not exist. 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. g. g. TLD -i SITE-NAME -U USERNAME This worked perfectly fine in CMK 2. Agent Registration (Pairing) for TLS Encryption. 0p15. e. 02. SebLthr June 14, 2022, 8:17am 1. 0, that will not be possible. 1. 0p10 OS: linux The hosts agent supports TLS, but it is not being used. I installed the CheckMK Agent on a TrueNAS SCALE host. socket. Hi, Some days ago i was testing this software, do a few tests and lately installed on a VM runing linux mint 20. 4. The hosts agent supports TLS, but it is not being used. 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. Please provide me with the output of: systemctl status check-mk-agent. 1. exe register --trust-cert -vv” command: [2023-02-10 12:54:18. 1. It has to match the actual hostname used by the Checkmk server, found under “Setup” > “Hosts”. apt remove --purge check-mk-agent dpkg -i check-mk-agent_2. We strongly recommend to enable TLS by registering the host to the site (using the cmk-agent-ctl register command on the monitored host). XXX. Bei einem Netzwerkdienst liegt es nahe, den Dienst über das Netzwerk abzufragen und über diesen Weg auch zu überwachen. Version: 2. Der Benutzer cmk-agent wird während der Installation des Agentenpakets. 1. Explcit host: xxx. I am experiencing a problem with registering the agent: CMK version: 2. Thx karnicmk-agent-ctl register -v -H HOSTNAME -P 'PASSWORD' -s SUBDOMAIN. But if cmk-agent-ctl cannot be started, access fails. The cmk-agent user is created during the installation of the agent. 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. socket systemctl status cmk-agent-ctl-daemon. 0 onwards), you have to add the following rights (internal name "general. 1. 0. cmk-update-agent register -v -H COMPUTERNAME -U register -S xxxxxxxxxxxxxxxxx. monitoring. 489987 +01:00] INFO [cmk_agent_ctl] srclib. The Windows agent. Distribute below files from new baked agent to all agents that were baked with expired certificate. The agent control use the port 8000 for communication. Create MSI file for windows 2019 server. Hi @robin. XXX. cre default. Checkmk Enterprise Edition 2. cmk-update-agent –v. checkmk-v2-1. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. com:8000 --site itbetrieb --user automation --password xxxxxxxx --trust-cert -vv Version: 2. Reload check_mk configuration using below command –. check_für das Abfragen von Webseiten. The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. Checkmk Community CMK Agent Controller not working (CentOS 7) - CMK 2. 2 Delete all directories/files of the agent controller from the host. Hello, I have a problem with enabling TLS in CheckMk 2. 1. OS version: TrueNAS SCALE 22. exe register --hostname HOST --server SERVER: 8001 --site SITE --user USER. Welcome to Checkmk. 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. OK, let’s figure out who is doing what. apt remove --purge check-mk-agent dpkg -i check-mk-agent_2. socket systemctl status cmk-agent-ctl-daemon. Copy the cmk-update-agent binary or the cmk_update_agent. service should work as expected. My server proxmox follow the guide from checkmk, where create the user, policy, open port 6556, special agent. This might be a bug. To register a host, users need the following permissions: Agent pairing. to checkmk. 1. cmk-agent-ctl delete-all --enable-insecure-connections; cmk-agent-ctl status; cmk-agent-ctl register --hostname $(hostname -f) --server checkmk21-prod. 1. Become a Dealer. 1. CMK 2. wants/check-mk-agent. Register the host on the Checkmk server by invoking cmk-update-agent register. If I try to register it with the command: cmk-agent-ctl register --detect-proxy --hostname FOO --server bla. For a user to be able to do the cmk-agent-ctl register, which is needed to enable the TLS encryption (available from 2. If you use the bakery, the agent was baked with enabled cmk-agent-ctl. 1. Der für die verschlüsselte Kommunikation mit dem Checkmk-Server zuständige Agent Controller cmk-agent-ctl. The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. 6. From its very beginning, monitoring Windows servers has been one of the most important tasks performed by Checkmk. /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. 1. For Debian remove the cmk-agent and purge the configuration, than reinstall the agent, this purges the xinetd configuration. I am not able to debug the cmk-agent-ctl since it is in binary form: You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. Join thousands of sysadmins and receive free professional tips and tricks to help you monitor your IT-infrastructure. In your case doing proxy. The agents' Agent Controller makes a request for registration to the server’s Agent Receiver, transmitting the data required to create the host. user -vv INFO [cmk_agent_ctl] starting. . I get a return with value: 16 The web test connection has a successfull ping but the agent. I had to add the checkmk user again. 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. The agent-receiver of the first checkmk instance usually listens on port 8000, this is the port you need the agent to register against. deb Now the cmk-agent-ctl-daemon. (We used cmk-agent-ctl proxy-register → deploy json to host → cmk-agent-ctl import . 3. When trying to register the checkmk agent: Access is denied:. CMK version: 2. Welcome to Checkmk. CMK version: 2. 0 ergänzt das Agentenskript mit dem Agent Controller und neuen Funktionen. The Agent Controller cmk-agent-ctl is the component within the agent that is responsible for transporting the data collected by the agent script. apt remove --purge check-mk-agent dpkg -i check-mk-agent_2. check_für das Abfragen von Webseiten. But when the distributed server wants to query the remote agent: [agent] Communication failed: [SSL: SSLV3_ALERT_HANDSHAKE_FAILURE] sslv3 alert handshake failure (_ssl. 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). mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. 0p22 agent by running cmk-agent-ctl on the 2. 1. com:8000 --site itbetrieb --user automation --password xxxxxxxx --trust-cert -vv Version: 2. XXX. Sie können sich mit cmk-agent-ctl help die Kommandohilfe anzeigen lassen, auch spezifisch für die verfügbaren Subkommandos, z. 04 Command used for registration: cmk-agent-ctl. How to Contact. Wie Sie den Agenten nutzen, erfahren Sie hier. Registration indeed is good. The cmk-agent user was sucessfully created. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. Das funktioniert. 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. Welcome to the Checkmk User Guide. 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. com. Here is the deep link to the section in the manual:. Sie können sich mit cmk-agent-ctl help die Kommandohilfe anzeigen lassen, auch spezifisch für die verfügbaren Subkommandos, z. deb Now the cmk-agent-ctl-daemon. New replies are no longer allowed. no login shell, and is used only for data transfer. 0 OS Version: Appliance 1. We will be asked for some information about the host. service: Scheduled restart job, restart counter is at 2. Agent Controller is not running, no config files can be found in the systemd directory and within xinetd. Also, from the command line of the CentOS 7 server I can fetch the login. OS version: Ubuntu Server. 0 2. Hello. d, only the check-mk-agent can be found: [root@jumphost]# cmk-agent-ctl register --hostname myclient . Ok, so the user I’m using to do the agent registration. But if cmk-agent-ctl cannot be started, access fails. The registration is done using the Agent Controller cmk-agent-ctl, which provides a command interface for configuring the connections. exe" register --hostname s3mo-tape. 168. 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. In your case. slice (loaded active) and check_mk. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. 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. C:\ProgramData\checkmk\agent\config\cas\all_certs. Copy the cmk-update-agent binary or the cmk_update_agent. domain. Bis einschließlich b2 war es so, dass der cmk-agent-ctl NICHT am Socket lauscht, solange er nicht für die TLS Verbindung registriert ist. 0 last week. CMK version: 2. The challenge is registering an agent, i. 0. Install the suitable Checkmk agent on the server you want to monitor and add the server as a host in Checkmk. service: Scheduled restart job, restart counter is at 2. The Hostname is the familiar name that Checkmk will use for the monitoring. service systemctl stop check-mk-agent. CMK version:2. The port can be different in your case. Hello, I have an issue with the registration of the host on a server : the agent-receiver on server-side is always crashing around 15/20 seconds and restarts. To summarize: If you want to customize a Checkmk configuration and activate the changes, in Nagios you will subsequently require: OMD [mysite]:~$ cmk -R. Der Linux-Agent der Checkmk-Version 2. Now you need to register the agnet for TLS handshake. Upon first try, “cmk-agent-ctl register. C:ProgramDatacheckmkagentconfigcasall_certs. TLD -i SITE-NAME -U USERNAME This worked perfectly fine in CMK 2. socket failed. This topic was automatically closed 365 days after the last reply. The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. jlagendijk (Jesse) June 2, 2022, 10:04am 1. 0p15 OS version: TrueNAS SCALE 22. service Ikkarus13 (Sascha Kunimünch) May 25, 2022, 1:18pm. com. After a reboot the cmk-agent-ctl-daemon and the check-mk-agent. Thank you very much to assist me on this way! system (system) Closed September 26, 2023, 4:01pm 9. Diese werden auch als aktive Checks bezeichnet. 0. Registration indeed is good. when i executing the command remotely via powershell i’m. local:8000 -s checkmk. 0/26. Could you please check who is claiming port 6556? ss -tulpn | grep 6556 This should be cmk-agent-ctl in daemon mode. 2. 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. 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. Checkmk Enterprise Edition 2. socket systemctl status cmk-agent-ctl-daemon. to checkmk. root@kerneltalks # service xinetd reload. ” 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. folgenden Register Befehl benutzt. NOTE: A registered host will refuse all unencrypted connections. 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. 1. Address: 401 Hartwig Court, 1208 Wharf Street, Victoria, BC, V8W 2P5, CanadaCTP Distributors. TLD -i SITE-NAME -U USERNAME This worked perfectly fine in CMK 2. You can analyze this by having a look at the server’s certificate chain. exe register --trust-cert --hostname mein. 1 gave 404 Not Found: Host 127. 1. 1 does not exist. 1 Like. it --server 192. CMK agent is up and running, host is added to Check MK server and now I want to set up TLS connection. –server checkmk. But if cmk-agent-ctl cannot be started, access fails. hardware:~#] cmk-agent-ctl. Sie können sich mit cmk-agent-ctl help die Kommandohilfe anzeigen lassen, auch spezifisch für die verfügbaren Subkommandos, z. in the host run the register checkmk agent. 0p6. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. Upon first try, “cmk-agent-ctl register. Hello. If it is xinetd remove the. socket systemctl status cmk-agent-ctl-daemon. 1. One of my hosts is producing this error, while most others register fine: root@sshgateway:~# cmk-agent-ctl register --hostname gateway. Now the cmk-agent-ctl-daemon. 1. Contact an admin if you think this should be re-opened. Using previous settings from /etc/cmk-update-agent. If you use the bakery, the agent was baked with enabled 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. 1 Like. Danach erfolgte die Registrierung und der Update Befehl. 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. If you want to use the agent in legacy mode, you need to disable cmk-agent-ctl in bakery rules. 1. From here click Create new host. 1. 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. 0. 0. After the installation everything worked. 0p24 to 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. I created the folder manually and changed ownership, and now the registration. Here is a fix that worked for me, in case anyone else runs into this. 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. I created the folder manually and changed ownership, and now the registration. socket failed. Linux: cmk-agent-ctl register --server meinserver. 6 LTS Package: check-mk-raw-2. no login shell, and is used only for data transfer. The added executable is called cmk-agent-ctl. 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. 4. Agent Victoria, British Columbia 1970's Members Murray Acton ~ Guitar, Vocals Steve Andreas ~ Bass, Vocals Peter Bryant ~ Drums, Vocals Wayne Darling ~. 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. 2. example. The service is started. mit cmk-agent-ctl help register. OS version: Ubuntu Server. 2. Ok, so the user I’m using to do the agent registration is part of the Administrator group, which is a default group that has all the permissions regarding agents. CMK version: 2. 6. 4. 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. If the host is monitored by multiple sites, you must register to. ss -tulpn | grep 6556 This should be cmk-agent-ctl in daemon mode. Created symlink /etc/systemd/system/sockets. So if you make any changes to the config file then you need to reload configuration or restart the agent. The cmk-agent user is created during the installation of the agent. Redirecting to /bin/systemctl reload xinetd. 1. Diese werden auch als aktive Checks bezeichnet. service - Checkmk agent controller daemonIt seams you use a Debian system. gawainsr2 August 15, 2022, 5:52pm 1. net -i STAR -P 'XXXXX' -U automation -H sys-vbr02The hosts agent supports TLS, but it is not being used. 1. socket (failed failed) so I stopped and disabled them, then did systemctl daemon-reload and systemctl. 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. py script to the host to be monitored (both can be found at ~/share/check_mk/agents/plugins on the Checkmk server). net -i STAR -P 'XXXXX' -U automation -H sys-vbr02Apparently I’m too stupid to find the correct call for agent registration via REST API in any documentation. no login shell, and is used only for data transfer. 5. mschlenker (Mattias Schlenker) May 30, 2022, 6:11pm 4. Yes, it might seem weird. CMK 2. cmk-agent-ctl register --hostname app-a. 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. Im talking about the network proxy admin and/ o the admin of the client. DOMAIN. 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. rs:14: st… As mentioned in another thread, you actually ran into a newly implemented CSR version check that’s. 0. Could you please check who is claiming port 6556?. It seams you use a Debian system. serviceThe REST in the name of the REST API stands for REpresentational State Transfer, and it describes an architecture for the exchange of data on distributed systems — especially for web. And now. CMK 2. mschlenker (Mattias Schlenker) May 30, 2022, 6:11pm 4. 488899 +01:00] INFO [cmk_agent_ctl] srcmain. 1 does not exist. 1 server? You have to run the cmk-agent-ctl on the machine running the agent, not from the server. The cmk-agent user is created during the installation of the agent. 5. 1. Die Registrierung klappt einfach nicht (die Hosts sind aber auch schon aus der 2. 4:8000 --site cmk --user cmkadmin --password password. 2 system. NOTE: A registered host will refuse all unencrypted connections. 1. 1 the monitoring data sent from the monitored host to the monitoring server is TLS encrypted and compressed by default. when i executing the command remotely via powershell i’m. Monitoring Windows - The new agent for Windows in detail. For Debian remove the cmk-agent and purge the configuration, than reinstall the agent, this purges the xinetd configuration. 6. g. The controller is executed under the cmk-agent user, which has limited privileges, e. This can be problematic if you are monitoring the same host from a site running Checkmk version 2. I’m using CMK 2. I have around 60 Windows servers which I have checked using a backed agent. 1. exe to register the Agent Controller. 1. Unfortunately, the problem remains: C:\WINDOWS\system32>"C:\Program Files (x86)\checkmk\service\cmk-agent-ctl. I am trying to register an agent installed on a Windows Server 2019. Auto-confirmation for cmk-agent-ctl register command? General. 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. 1. I created the folder manually and changed ownership, and now the registration. 0b4_0 raw OS: Ubuntu 20. exe . Checkmk. WalterH (Walter Hofstädtler) May 30, 2022, 5:42pm 31. ColinP November 12, 2022, 12:44pm 1. You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. 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. We strongly recommend to enable TLS by registering the host to the site (using the `cmk-agent-ctl register`. –user automation --password “xxx”. Bei der Registrierung der Agents ergibt sich bei beiden Server folgender Fehler: <HOST>:~ # cmk-agent-ctl register --hostname <HOSTNAME> --server 192. cmk-agent-ctl register --hostname 1. 7. 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. 1. no login shell, and is used only for data transfer. XXX. Deutsch. The windows installer supports the following command line arguments: /S - runs the installer silently /D= - sets the default installation directory. raptorswithhats. $ cmk-update-agent register $ cmk-agent-ctl register. Bei der Registrierung wurde in den Anleitungen von chekmk mit dem “automation” User gearbeitet, ich habe es mit dem cmkadmin gemacht was bei den. Yes I did use the” cmk-agent-ctl register command,. gerhards. systemctl stop cmk-agent-ctl-daemon. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. 0 onwards), you have to add the following rights (internal name “general. xyz:9800 --site cmk --user BAR --password FOO. 0-1_all. mydomain. 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.