WARNING: The Agent Controller is operating in an insecure mode! To secure the connection run cmk-agent-ctl register. 1. The cmk-agent user was sucessfully created. The hosts agent supports TLS, but it is not being used. cmk-agent-ctl delete-all --enable-insecure-connections; cmk-agent-ctl status; cmk-agent-ctl register --hostname $(hostname -f) --server checkmk21-prod. 04 LTS. 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. B. 0p15. 1 Like. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. 2. 10. mschlenker (Mattias Schlenker) May 30, 2022, 6:11pm 4. 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. " Jun 17 10:57:15 nc systemd[1]: cmk-agent-ctl-daemon. Jun 17 10:57:15 nc systemd[1]: Stopped Checkmk agent controller daemon. Hi everyone, below is the output of the “cmk-agent-ctl. socket failed. redacted. The cmk-agent user was sucessfully created. Deutsch. If the host is monitored by multiple sites, you must register to. I am using the Raw edition of CheckMK for my (rather large) Hobbyist stuff. 0. Currently, only systemd on the x86_64 platform is. 1. Password: explicit. Please provide me with the output of:. cmk-agent-ctl register -v -H HOSTNAME -P 'PASSWORD' -s SUBDOMAIN. But if cmk-agent-ctl cannot be started, access fails. xyz:9800 --site cmk --user BAR --password FOO. As for all other server operating systems, Checkmk therefore also provides its own agent for Windows, an agent program that is both minimalistic and secure. py script to the host to be monitored (both can be found at ~/share/check_mk/agents/plugins on the Checkmk server). This is realized by a new component on the monitored hosts: The Checkmk agent controller cmk-agent-ctl. domain. The registration is done using the Agent Controller cmk-agent-ctl, which provides a command interface for configuring the connections. Update: Nervermind. With telnet i can connect to the agent from the OMD server. Sehr beliebt ist z. cmk-agent-ctl register --hostname myhost --server checkmk. CMK version: 2. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. com:8000 --site itbetrieb --user automation --password xxxxxxxx --trust-cert -vv Version: 2. mschlenker (Mattias Schlenker) May 30, 2022, 6:11pm 4. 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. when i executing the command remotely via powershell i’m. omd update. service then restart xinitd and tell me about the output of ss -tulpn | grep 6556. Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins) sudo: cmk: command not found. 0p17. Deutsch. For a user to be able to do the cmk-agent-ctl register, which is needed to enable the TLS encryption (available from 2. 7 I have problem since the connection to the cmk server has to be ssl encrypted. To register a host, users need the following permissions: Agent pairing. Segmentation fault (core dumped) The same result also with the all needed parameters for the registration. 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. DOMAIN. 6 Likes. 4:8000 --site cmk --user cmkadmin --password password. 1. 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. For some reason I am no longer able to register my agents with TLS. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. service1. 1 does not exist. exe register --hostname HOST --server SERVER: 8001 --site SITE --user USER. Thanks for your responses! @cyr0nk0r I rebaked the Agent using HTTP only and got rid of the. slice (loaded active) and check_mk. 1. cmk-agent-ctl register -v -H HOSTNAME -P 'PASSWORD' -s SUBDOMAIN. I am trying to register an agent installed on a Windows Server 2019. 45. py page via wget when I supply the correct credentials. I am not able to debug the cmk-agent-ctl since it is in. cmk-agent-ctl register --hostname localhost --server server:8000 --site mysite --user cmkadmin -vv. 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. 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. Alle Hosts angelegt mit Hostname und IP Adresse. 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. To summarize: If you want to customize a Checkmk configuration and activate the changes, in Nagios you will subsequently require: OMD [mysite]:~$ cmk -R. andreas-doehler (Andreas) January 8, 2023, 3:48pm 2. cmk-agent-ctl. The port can either be included in the server name argument ( -s ), or it can be left out. It has to match the actual hostname used by the Checkmk server, found under “Setup” > “Hosts”. Reloading xinetd Activating systemd unit 'check-mk-agent. 5. 0 2. This might be a bug. Installed the agent on a Server (Windows and Ubuntu) Registered the agent with the following command: cmk-agent-ctl register --hostname --server --site --user automation --password. Dazu verwendet Checkmk teils eigene, teils bereits existierende Plugins. 0-1_all. Segmentation fault (core dumped) The same result also with the all needed parameters for the registration. Could you please check who is claiming port 6556? ss -tulpn | grep 6556 This should be cmk-agent-ctl in daemon mode. The exact command line is this: cmk-agent-ctl register -v -H HOSTNAME -P 'PASSWORD' -s SUBDOMAIN. 0p16-1. The controller is executed under the cmk-agent user, which has limited privileges, e. Any hints? aeckstein (Andre Eckstein) October 25, 2022, 4:36pm 4. Jun 17 10:57:15 nc systemd[1]: cmk-agent-ctl-daemon. com:443 -i cmk --user automation . I want to enable global registration via Hostname for other agents too, so I’ve enabled a nginx-reverseproxy with following settings:Hi, I have a weird problem with 3 nodes (Ubuntu 20. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. 0 ergänzt das Agentenskript mit dem Agent Controller und neuen Funktionen. 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. The Agent Controller cmk-agent-ctl is the component within the agent that is responsible for transporting the data collected by the agent script. de--site meine_site --user user --password password --hostname mein-host. The Agent Receiver tells the Agent Controller. Hi @P. 1 does not exist. 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. latest (2. deb The monitored system is in a local network and have. socket failed. First, to add a new host to monitor we have to go to the Hosts menu in the WATO - Configuration menu on the left. 0p20 Debian 11. 0 last week. I created the folder manually and changed ownership, and now the registration. CMK version:2. service: Scheduled restart job, restart counter is at 2. Der für die verschlüsselte Kommunikation mit dem Checkmk-Server zuständige Agent Controller cmk-agent-ctl. 0 OS Version: Appliance 1. ourcompany. 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. After a reboot the cmk-agent-ctl-daemon and the check-mk-agent. socket systemctl disable cmk-agent-ctl-daemon. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. Agent pairing; Read access to all hosts and folders Since Checkmk version 2. pem. example. 1. 2. If it is the second option you should review roles & permissions. Distribute below files from new baked agent to all agents that were baked with expired certificate. socket (failed failed) so I stopped and disabled them, then did systemctl daemon-reload and systemctl. OS: Windows Server 2019. Either import the self signed certificate on this server paperless-ngx or use the same command with port. As for all other server operating systems, Checkmk therefore also provides its own agent for Windows, an agent program that is both minimalistic and secure. service I see this error: ERROR [cmk_agent_ctl] Failed to listen on TCP socket for incoming pull connections. 489987 +01:00] INFO [cmk_agent_ctl] srclib. Das funktioniert. For more information try --help Command for registration. Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins) sudo: cmk: command not found. 0 2. 0. ╰─$ sudo cmk-agent-ctl status Version: 2. I am trying to register an agent installed on a Windows Server 2019. Sie können sich mit. All commands to be executed on the host to be monitored. 0 or earlier. You might apt-get remove the old Checkmk package when no site is using it any more. 04. New install of CMK (via RPM) - trying to just register the localhost agent. 0p24 to 2. d/ there might be a residual configuration file called checkmk or similar. 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. exe” register --site yousitename --server yourcmkserver --user automation --hostname windows_box_hostname --password1. 2 system. 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. ss -tulpn | grep 6556 tcp LISTEN 0 4096 *:6556 : users:((“cmk-agent-ctl”,pid=425,fd=9)) On the. This topic was automatically closed 365 days after the last reply. no login shell, and is used only for data transfer. service systemctl disable cmk-agent-ctl-daemon. 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. 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. 0p12. 2 system. ). The controller is executed under the cmk-agent user, which has limited privileges, e. Version: 2. It’s hard to tell where exactly it comes from. c:2633). Tested turning off firewall on 2019. I am trying to register an agent installed on a Windows Server 2019. exe' register -s checkmk. exe” register --site yousitename --server yourcmkserver --user automation --hostname windows_box_hostname --password 1. If the Agent Receiver accepts the request,. 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. In case it is left out, the agent controller tries to query the port from the REST API. Going from one patch level to another one (like from p16 to p20) basically is: dpkg -i checkmk…new. I installed the CheckMK Agent on a TrueNAS SCALE host. omd stop mysite. net -i STAR -P 'XXXXX' -U automation -H sys-vbr02The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. 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. no login shell, and is used only for data transfer. 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”). Hello. But when the distributed server wants to query the remote agent: [agent] Communication failed: [SSL: SSLV3_ALERT_HANDSHAKE_FAILURE] sslv3 alert handshake failure (_ssl. Hello. system (system) Closed October 17, 2023, 5:42am. service. ColinP November 12, 2022, 12:44pm 1. service: Scheduled restart job, restart counter is at 2. 0. DOMAIN. 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. The port can either be included in the server name argument ( -s ), or it can be left out. 0) master 1. I am trying to add new servers with: amnesiac ≫ [ 10:47:25 ] ≫ ~ $ cmk-agent-ctl register-new --server. secret with the password as String. 02. 0. Using previous settings from /etc/cmk-update-agent. All commands to be executed on the host to be monitored. 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. 1. g. Reload check_mk configuration using below command –. 16-150300. The Agent Controller cmk-agent-ctl is the component within the agent that is responsible for transporting the data collected by the agent script. 2 system. Record Keeping Keep a copy of your application and all submitted documents for your records. 0. root@kerneltalks # service xinetd reload. Inside the container: root@9529f647cd27:/# omd version OMD - Open Monitoring Distribution Version 2. 0 (Blue Onyx) [root@CHECKMK services]# cmk-agent-ctl. In your case doing proxy. cmk-agent-ctl register --hostname 1. latest (2. it --server 192. 0p9. I should have mentioned I have a network device sitting in-between which is presenting a different certificate (the wildcard cert signed by a public CA) and I haven’t changed any CA settings outside the web UI. Ikkarus13 (Sascha Kunimünch) May 30, 2022, 8:00am 1. 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. The cmk-agent user is created during the installation of the agent package. DOMAIN. TLD -i SITE-NAME -U USERNAME This worked perfectly fine in CMK 2. Checkmk. 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. Einen auf den Server auf der Docker Service läuft (OpenSuse Tumbleweed), sowie einen Windows Server 2016. 4. exe" status It also seems that you have multiple sites on your Checkmk server based on port 8001 in the response. If the host is monitored by multiple sites, you must register to all of them. Jun 17 10:57:15 nc systemd[1]: cmk-agent-ctl-daemon. Welcome to the Checkmk User Guide. exe register --trust-cert -vv” command: [2023-02-10 12:54:18. I’m running 2. 0p20 Ubuntu 20. So if you make any changes to the config file then you need to reload configuration or restart the agent. 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. service Ikkarus13 (Sascha Kunimünch) May 25, 2022, 1:18pm. socket systemctl status cmk-agent-ctl-daemon. 0p15. Im talking about the network proxy admin and/ o the admin of the client. If the host is monitored by multiple sites, you must register to all of them. In your case doing proxy. 2 system. p3 OS version: CentOS 8. TLD -i SITE-NAME -U USERNAME This worked perfectly fine in CMK 2. Hi everyone, below is the output of the “cmk-agent-ctl. TLD -i SITE-NAME -U USERNAME. In checkmk for the host service got below warning. 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. 1. Monitoring Linux - The new agent for Linux in detail. g. „TLS is not activated on monitored host (see details)“. If there are leftovers from 2. When trying to register the checkmk agent: Access is denied:. Unfortunately, the problem remains: C:WINDOWSsystem32>"C:Program Files (x86)checkmkservicecmk-agent-ctl. Please provide me with the output of: systemctl status check-mk-agent. If you forward port 9800 to 8000 then you also have to use port 9800 in your register command. 4. NOTE: A registered host will refuse all unencrypted connections. Could you please check who is claiming port 6556?. Diese werden auch als aktive Checks bezeichnet. CMK 2. Agent pairing; Read access to all hosts and folders; Write access to all hosts and folders; regards. 5. 0p15 OS version: TrueNAS SCALE 22. The server and the host are on the same network, the same virtualization cluster. 0 or earlier. Dann hast du die Herangehensweise schon gefunden, wenn man die Zertifikate noch nicht im Griff hat. I created the folder manually and changed ownership, and now the registration is working! Agent Controller is not running, no config files can be found in the systemd directory and within xinetd. domain. Einen auf den Server auf der Docker Service läuft (OpenSuse Tumbleweed), sowie einen Windows Server 2016. We strongly recommend to enable TLS by registering the host to the site (using the `cmk-agent-ctl register`. 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. socket systemctl status cmk-agent-ctl-daemon. Deutsch. SebLthr June 14, 2022, 8:17am 1. 488899 +01:00] INFO [cmk_agent_ctl] srcmain. In checkmk for the host service got below warning. service: Scheduled restart job, restart counter is at 2. You also need a --hostname flag, like --hostname test. 7. Finally, in Bake agent packages, activate. Bulk Consent Manager. 0 adds the Agent Controller and new features to the agent script. 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. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. cmk-agent-ctl register --hostname localhost --server server:8000 --site mysite --user cmkadmin -vv. 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”). mschlenker (Mattias Schlenker) May 30, 2022, 6:11pm 4. 1. 0p20 Debian 11. example. 2. p16 OS version: RH8,Windows Server 2019 Error message: I can’t use 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". 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. If the host is monitored by multiple sites, you must register to. 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. THaeber • 5 mo. WalterH (Walter Hofstädtler) May 30, 2022, 5:42pm 31. DOH I forgot I had set a custom port for agent receiver as i had a conflict for 8000 on my docker host. But before we start with the actual. So if you make any changes to the config file then you need to reload configuration or restart the agent. 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. 5. ” 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. This one is listening at port 8000. 0p15. 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. Das zu bestätigende Server-Zertifikat haben wir aus Gründen der. cre default. Welcome to Checkmk. Hi everyone, below is the output of the “cmk-agent-ctl. wants/check-mk-agent. WARNING: The Agent Controller is operating in an insecure mode! To secure the connection run cmk-agent-ctl register. B. This port can be found out via omd config > Basics > AGENT_RECEIVER_PORT Of course, this port has to be exposed for the. Install went fine. Hello, I updated my CheckMK installation to firmware 1. Checkmk. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. The agents' Agent Controller makes a request for registration to the server’s Agent Receiver, transmitting the data required to create the host. 2 system. 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. apt remove --purge check-mk-agent dpkg -i check-mk-agent_2. 1. exe' register -s checkmk. CMK version: 2. With that flag added the machine registers just fine. Since the machine you’re trying to monitor is still 2. I’m running 2. If I try to register it with the command: cmk-agent-ctl register --detect-proxy --hostname FOO --server bla. Version: 2. CMK version: 2. deb. worked fine for me. If you want to use the agent in legacy mode, you need to disable cmk-agent-ctl in bakery rules. 0p15. There were some user permission issues with the agent registration (cmk-agent-ctl register. 0. 0b4-1 OS: Ubuntu 20. 1. Please provide me with the output of:. to checkmk. But if cmk-agent-ctl cannot be started, access fails. This worked perfectly fine in CMK 2. 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. 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 cmk-agent user is created during the installation of the agent. socket. 3. Created symlink /etc/systemd/system/sockets. Registration indeed is good. 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 accept the certificate. 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”). 0-1_all. C:ProgramDatacheckmkagentconfigcasall_certs. 0p22 agent by running cmk-agent-ctl on the 2. Hello, I have a problem with enabling TLS in CheckMk 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. keine Login-Shell hat und nur zur Datenübertragung genutzt wird. d, only the check-mk-agent can be found: [root@jumphost]# cmk-agent-ctl register --hostname myclient \. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. 1. This might be a bug. $ sudo systemctl restart cmk-agent-ctl-daemon. You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. For this, I’m running following command on client # cmk-agent-ctl register --hostname `hostname -f` --server mon. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. 1. The cmk-agent user is created during the installation of the agent. Here is a fix that worked for me, in case anyone else runs into this. 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. 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). This might be a bug. I’m using CMK 2. 2.