This topic was automatically closed 365 days after the last reply. 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. Einen auf den Server auf der Docker Service läuft (OpenSuse Tumbleweed), sowie einen Windows Server 2016. If you want to use the agent in legacy mode, you need to disable cmk-agent-ctl in bakery rules. Version: 2. TLD -i SITE-NAME -U USERNAME This worked perfectly fine in CMK 2. 4:8000 --site cmk --user cmkadmin --password password. 10. 0 the new Linux agent with the Agent Controller supports the registered, TLS-encrypted and compressed pull mode. I am trying to register an agent installed on a Windows Server 2019. CMK Checkmk Enterprise Edition 2. Hello, I updated my CheckMK installation to firmware 1. 1. g. If you want to use the agent in legacy mode, you need to disable cmk-agent-ctl in bakery rules. CMK Version: CRE 2. Deutsch. The added executable is called cmk-agent-ctl. 0 adds the Agent Controller and new features to the agent script. 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. Afterwards, port 6556 should be claimed by. 1. I had to add the checkmk user again. TLD -i SITE-NAME -U USERNAME This worked perfectly fine in CMK 2. service systemctl disable cmk-agent-ctl-daemon. 0b4_0. 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. Welcome to the Checkmk User Guide. 3. 489987 +01:00] INFO [cmk_agent_ctl] srclib. com. Also, from the command line of the CentOS 7 server I can fetch the login. Installing an agent and starting monitoring was straightforward - everything happens over SSH. 0p9. This worked perfectly fine in CMK 2. 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. exe" status It also seems that you have multiple sites on your Checkmk server based on port 8001 in the response. gerhards. If the host is monitored by multiple sites, you must register to all of them. pem. 0 2. 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. Please provide me with the output of: systemctl status check-mk-agent. NOTE: A registered host will refuse all unencrypted connections. The cmk-agent user is created during the installation of the agent. Für Linux habe ich cmk-agent-ctl register --hostname xxx --server. 0) master 1. exe” register --site yousitename --server yourcmkserver --user automation --hostname windows_box_hostname --password 1. to checkmk. c:2633). You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. The controller is executed under the cmk-agent user, which has limited privileges, e. 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. Welcome to Checkmk. 0. consorzioburana. From its very beginning, monitoring Windows servers has been one of the most important tasks performed by Checkmk. TLD -i SITE-NAME -U USERNAME. The agents' Agent Controller makes a request for registration to the server’s Agent Receiver, transmitting the data required to create the host. omd start. Password for user ‘cmkadmin’: Successfully registered agent of host “monitor2” for deployment. You can display. 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. 1. Can you verify this? You can use the following command for this, "C:Program Files (x86)checkmkservicecmk-agent-ctl. I’m running 2. keine Login-Shell hat und nur zur Datenübertragung genutzt wird. OS: linux. Either import the self signed certificate on this server paperless-ngx or use the same command with port. 1. 0. com:443 -i cmk --user automation . The docker run command from the documentation is using -p 8000:8000 to bind that port externally. 1. Ok, so the user I’m using to do the agent registration. Become root. First, to add a new host to monitor we have to go to the Hosts menu in the WATO - Configuration menu on the left. For a user to be able to do the cmk-agent-ctl register, which is needed to enable the TLS encryption (available from 2. 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. So if you make any changes to the config file then you need to reload configuration or restart the agent. Troubleshooting. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. mit cmk-agent-ctl help register. 1. Address: 401 Hartwig Court, 1208 Wharf Street, Victoria, BC, V8W 2P5, CanadaCTP Distributors. So if you make any changes to the config file then you need to reload configuration or restart the agent. B. XXX. 57. 107:8000 --site home -U cmkadmin ERROR [cmk_agent_ctl… One of my hosts is producing this error, while most others register fine: root@sshgateway:~# cmk-agent. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. In your case doing proxy. gerhards. Checkmk Community CMK Agent Controller not working (CentOS 7) - CMK 2. 1. (We used cmk-agent-ctl proxy-register → deploy json to host → cmk-agent-ctl import . If I try to register it with the command: cmk-agent-ctl register --detect-proxy --hostname FOO --server bla. Linux: cmk-agent-ctl register --server meinserver. domain. When you have done all this, install the agent again and it will work properly. CMK version: 2. Hi everyone, below is the output of the “cmk-agent-ctl. socket failed. 0 or earlier. 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. 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. Registration indeed is good. 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. cmk-update-agent –v. Das zu bestätigende Server-Zertifikat haben wir aus Gründen der. 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. 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. 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. I am trying to register an agent installed on a Windows Server 2019. socket failed. 0p14 Agent socket: operational IP allowlist: 10. gerhards. 0p17. Dann hast du die Herangehensweise schon gefunden, wenn man die Zertifikate noch nicht im Griff hat. rs:41: Loaded config from. ” failed with this error: "Request failed with code 500 Internal Server Error: Internal Server Error" root@linux# cmk-agent-ctl register --hostname localhost --server mycmkserver --site mysite --user cmkadmin Waren die angegebenen Werte korrekt, werden Sie aufgefordert, die Identität der Checkmk-Instanz zu bestätigen, zu der Sie die Verbindung herstellen wollen. 0. latest (2. –server checkmk. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. Thx karnicmk-agent-ctl register -v -H HOSTNAME -P 'PASSWORD' -s SUBDOMAIN. exe register --trust-cert --hostname mein. CMK version: 2. no login shell, and is used only for data transfer. Deutsch. We strongly recommend to enable TLS by registering the host to the site (using the `cmk-agent-ctl register` command on the monitored host). socket systemctl status cmk-agent-ctl-daemon. Finally, in Bake agent packages, activate. 1But if cmk-agent-ctl cannot be started, access fails. 0. check_mk agent runs on top of xinetd service in Linux. local:8000 -s checkmk. Baked and signed the agent. Sie können zwei Checkmk-Appliances. 1. 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 experiencing a problem with registering the agent: CMK version: 2. Here it makes sense to pass the required registration information directly via the command. CMK version: 2. de --site monitoring --user cmkadmin. 1. Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins) sudo: cmk: command not found. 0p13. $ cmk-update-agent register $ cmk-agent-ctl register. OS: Windows Server 2019. $ sudo systemctl restart cmk-agent-ctl-daemon. 0 (Blue Onyx) [root@CHECKMK services]# cmk-agent-ctl. You have three options here: Make the REST API call work. de--site meine_site --user user --password password --hostname mein-host. 1. echo y|sudo cmk-agent-ctl register --hostname vmansible01 –server vmcheckmk01. 0. 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. cee Ubuntu 16. If you use the bakery, the agent was baked with enabled cmk-agent-ctl. 0. sh script. It has to match the actual hostname used by the Checkmk server, found under “Setup” > “Hosts”. service. 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. exe register --hostname HOST --server SERVER: 8001 --site SITE --user USER. If it is systemd please give us the output of systemctl --version. 0. Welcome to the Checkmk User Guide. Hi everybody, i’am new to checkmk and trying to configure the agent but getting the same message, i couldn’t understand why. no login shell, and is used only for data transfer. Please provide me with the output of:. I am trying to register an agent installed on a Windows Server 2019. 1. service should work as expected. 0p23 OS version: Windows Server 2019 Essentials Error message: ERROR [cmk-agent-ctl] srcmain. 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. You can learn how to use the agent here. NOTE: A registered host will refuse all unencrypted connections. THaeber • 5 mo. latest (2. Now you need to register the agnet for TLS handshake. 0. For Debian remove the cmk-agent and purge the configuration, than reinstall the agent, this purges the xinetd configuration. mschlenker (Mattias Schlenker) July 8, 2022, 8:12am 4. OS version: Rocky Linux release 9. 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. 1. 1 does not exist. service You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. exe' register -s checkmk. If you use the bakery, the agent was baked with enabled cmk-agent-ctl. 02. Dazu verwendet Checkmk teils eigene, teils bereits existierende Plugins. DOMAIN. If it is xinetd remove the. Monitoring Windows - The new agent for Windows in detail. 0p9. The Windows agent. 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). TLD -i SITE-NAME -U USERNAME This worked perfectly fine in CMK 2. slice (loaded active) and check_mk. The registration works. Upon first try, “cmk-agent-ctl register. root@waw1-monitor2:/omd# cmk-update-agent -v. 6 Likes. sh script. 0 (Blue Onyx) [root@CHECKMK services]# cmk-agent-ctl. 0. no login shell, and is used only for data transfer. For Debian remove the cmk-agent and purge the configuration, than reinstall the agent, this purges the xinetd configuration. 1. service I see this error: ERROR [cmk_agent_ctl] Failed to listen on TCP socket for incoming pull connections. en. Die Registrierung klappt einfach nicht (die Hosts sind aber auch schon aus der 2. With telnet i can connect to the agent from the OMD server. 57. We strongly recommend to enable TLS by registering the host to the site (using the cmk-agent-ctl register command on the monitored host). The systemd is version 246. in the host run the register checkmk agent. 488899 +01:00] INFO [cmk_agent_ctl] srcmain. 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. 4. Could you please check who is claiming port 6556? ss -tulpn | grep 6556 This should be cmk-agent-ctl in daemon mode. com:8000/cmk. 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. cre default. XXX. Agent auf allen Monitored Hosts installiert. With Checkmk agent connection mode you decide whether the Checkmk agent should work in pull mode or (as in the following image) in push mode. Hello. I had to add the checkmk user again. agent_pairing") to their role. exe – register --trust-cert’ USAGE: cmk-agent-ctl. de --server monitor. 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. com--site FOO --user BAR --password FOO The new agents at 2. Only after I manually ran “cmk-agent-ctl register” it listened again. 0p12 Agent socket: operational IP allowlist: any Connection: xxxxx UUID: xxxxxx Local: Connection type: pull-agent Certificate issuer: Site 'xxx' local CA Certificate validity: Wed, 05 Oct 2022 12:04:40 +0000 - Mon, 05 Feb 3021 12:04:40 +0000 Remote: Connection type: pull-agent. I created the folder manually and changed ownership, and now the registration. 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. The controller is executed under the cmk-agent user, which has limited privileges, e. Output of “cmk --debug -vvn hostname”: (If it is a problem with checks or plugins) sudo: cmk: command not found. So, Checkmk is ready. 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. checkmk-v2-1. mschlenker (Mattias Schlenker) May 30, 2022, 6:11pm 4. Einen auf den Server auf der Docker Service läuft (OpenSuse Tumbleweed), sowie einen Windows Server 2016. The Agent Controller cmk-agent-ctl is the component within the agent that is responsible for transporting the data collected by the agent script. cmk-agent-ctl register --hostname myhost --server checkmk. Reloading xinetd Activating systemd unit. C:\ProgramData\checkmk\agent\config\cas\all_certs. 7. socket), aborting``` If I als run the daemon: ```cmk-agent-ctl daemon &``` It starts responding to status command, but still won't register the node: ```root@adfb306b5d58:/# cmk-agent-ctl status Version: 2. Checkmk. service should work as expected. For some reason I am no longer able to register my agents with TLS. The registration works. 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. 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. 4. Bei der Registrierung wurde in den Anleitungen von chekmk mit dem “automation” User gearbeitet, ich habe es mit dem cmkadmin gemacht was bei den. exe' register -s checkmk. For Debian remove the cmk-agent and purge the configuration, than reinstall the agent, this purges the xinetd configuration. CMK version: 2. The agent control use the port 8000 for communication. Checkmk. The hosts agent supports TLS, but it is not being used. example. Now the cmk-agent-ctl-daemon. Waren die angegebenen Werte korrekt, werden Sie aufgefordert, die Identität der Checkmk-Instanz zu bestätigen, zu der Sie die Verbindung herstellen wollen. C:\Program Files (x86)\checkmk\service>cmk-agent-ctl. In your case. g. Agent Registration (Pairing) for TLS Encryption. but this just ended in automation2 searching for automation accounts secrets, removed automation2. exe' register -s checkmk. 2 Delete all directories/files of the agent controller from the host. Welcome to Checkmk. 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. Ultimately, Checkmk was showing the agents were not registered because they were not in fact registered. 16-150300. Im talking about the network proxy admin and/ o the admin of the client. For a user to be able to do the cmk-agent-ctl register, which is needed to enable the TLS encryption (available from 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. py script to the host to be monitored (both can be found at ~/share/check_mk/agents/plugins on the Checkmk server). You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. I dont know why this folder could not be created during cmk agent installation from the cmk-agent-useradd. To summarize: If you want to customize a Checkmk configuration and activate the changes, in Nagios you will subsequently require: OMD [mysite]:~$ cmk -R. Hi @robin. example. This might be a bug. user -vv INFO [cmk_agent_ctl] starting. apt remove --purge check-mk-agent dpkg -i check-mk-agent_2. 02. Nun hast Du 2 Möglichkeiten: Entweder den controller für TLS registrieren (cmk-agent-ctl register -h für die Hilfe) oderCheckmk Enterprise Edition 2. 0p9. The new TLS feature is need to register with cmk-agent-ctl register command. g. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. Since the machine you’re trying to monitor is still 2. agent_pairing") to their role. When trying to register the checkmk agent: Access is denied:. DOMAIN. 0p2 RAW Edition. To register a host, users need the following permissions: Agent pairing. 1. Der für die verschlüsselte Kommunikation mit dem Checkmk-Server zuständige Agent Controller cmk-agent-ctl. I am trying to register an agent installed on a Windows Server 2019. 0p10 Agent socket: operational IP allowlist: any Connection: localhost:8001/cmk UUID: 186f71b9-8d6f-41c6-be44-bb1f7c23ae7b Local: Connection. 4. You can display command help with cmk-agent-ctl help, also for specific available subcommands, with cmk-agent-ctl help register for example. ” 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. It has to match the actual hostname used by the Checkmk server, found under “Setup” > “Hosts”. This port can be found out via omd config > Basics > AGENT_RECEIVER_PORT Of course, this port has to be exposed for the registration to. 6 LTS Package: check-mk-raw-2. If it is xinetd remove the. rs:14: starting [2023-02-10 12:54:18. Sie können sich mit cmk-agent-ctl help die Kommandohilfe anzeigen lassen, auch spezifisch für die verfügbaren Subkommandos, z. cmk-update-agent register -v -H COMPUTERNAME -U register -S xxxxxxxxxxxxxxxxx. I created the folder manually and changed ownership, and now the registration. But before we start with the actual. 5 LTS I have had no issues registering the agent on internal servers, but I have two servers hosted in the cloud which are fully connected and have appropriate NAT rules and local firewall rules to allow the communication, but registering results in the error: ERROR [cmk_agent_ctl] Operation. I am trying to register an agent installed on a Windows Server 2019. 1. sh script. 1 i’m trying to automate the process of registering our updated windows hosts to thee monitoring for tls encryption. CMK version: 2. 3. 1. For this, I’m running following command on client # cmk-agent-ctl register --hostname `hostname -f` --server mon. deb Monitored System (Host): Checkmk Agent version: 2. „TLS is not activated on monitored host (see details)“. It seams you use a Debian system. gerhards. 4. service: Scheduled restart job, restart counter is at 2. DOMAIN. The cmk-agent user was sucessfully created. apt remove --purge check-mk-agent dpkg -i check-mk-agent_2. 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. cmk-agent-ctl register -v -H HOSTNAME -P 'PASSWORD' -s SUBDOMAIN. $ sudo cmk-agent-ctl register --hostname localhost --server checkmk. service cmk-agent-ctl-daemon. 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. 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. the check-mk-agent is running (in xinetd mode) - trying to register a client is not possible because the cmk controller is looking for a socket (systemd) [root@jumphost]# cmk-agent-ctl status Version: 2. In your case doing proxy. 0 did not yet use TLS, so port 8000 didn’t need to be exposed back then. 4 --server 1. In your case. no login shell, and is used only for data transfer. 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 am also running Puppet so automation is a thing. 0p12 Agent socket: operational IP allowlist: any Connection: xxxxx UUID: xxxxxx Local: Connection type: pull-agent Certificate issuer: Site 'xxx' local CA Certificate validity: Wed, 05 Oct 2022 12:04:40 +0000 - Mon, 05 Feb 3021 12:04:40 +0000 Remote: Connection type: pull-agent. ss -tulpn | grep 6556 This should be cmk-agent-ctl in daemon mode. 1. The folder /var/lib/cmk-agent was missing on my SUSE Linux Enterprise Micro 5. Fixed that with create a new User “automation” and created the file automation. 514. net -i STAR -P 'XXXXX' -U automation -H sys-vbr02Registration indeed is good. sh script. 1. I created the folder manually and changed ownership, and now the registration.