Vérifiez que vos serveurs NTP sont maintenant bien présents dans la commande : allssh ntpq -p. Si jamais vous avez toujours une erreur dans le NCC comme ceci : The NTP servers configured on the hypervisor ([‘xxx.xxx.xxx.xxx’]) differ from those configured in zeus config… Assurez-vous d’avoir les mêmes serveurs NTP dans Prism et ceux spécifiez dans la partie configuration des ESXi. Run the following command on any CVM in the cluster to get an list of the 10 largest files in the /home/nutanix directory on all CVMs. @LIGNER_SNCF Une question le taraude... Pourquoi, à chaque retard, le train en question a la même heure de départ que le suivant ? Remove excess journal logs: nutanix@cvm$ allssh 'sudo journalctl --vacuum-size=512M' 2. As we moved the equipment and started the cluster, the cvm time was changed 1 day ahead. In such case, if you want to disable access, each rule has to be removed individually (see below). Since you need root privileges to modify iptables rules and you can’t use allssh command as root user, a sudo command is also required, allssh "sudo iptables -t filter -A WORLDLIST -p tcp -m tcp --dport 2009 -j ACCEPT". On peut bien voir la différence entre les deux commandes. Allssh command. Virtualization Eco-System Dummies?? Ce qui n’est pas la configuration recommandée. The script then gets confused and stops while still connected to one of the ESXi hosts. After the Controller VM shuts down, wait for the host to go into maintenance mode. Can you figure out how? can we ignore the point as these VMs will be migrated while putting the ESXi host in maintannace. Si jamais vous avez déjà de la production critique sur votre cluster Nutanix qui tourne, suivez cette procédure pour revenir dans le passé. I asked a question because I wanted to test it with the test equipment first. If for some reason you want to disable the access, this can be also done with allssh command. We'll send you an e-mail with instructions to reset your password. Vous pouvez vérifier que vos CVM communiquent bien et sont suceptibles de se synchroniser avec les NTP grâce à la commande ci-dessous. In the Confirm Maintenance Mode, click OK.The host gets ready to go into maintenance mode, which prevents VMs from running on this host. nutanix@cvm:~$ allssh ntpdate -q Based on the above output the max variance between the smallest and largest offset value should not be greater than 3 seconds. La configuration d’un cluster Nutanix est relativement simple et rapide, même lorsque l’hyperviseur est du VMware vSphere. You can also combine allssh and iptables commands to enable access to all nodes and do so by just using one command line and running it from just one CVM. The VMs that are not migrated automatically even when the DRS is enabled can be because of a configuration option in the VM that is not present on the target host. The steps were very detailed and worked as expected. Basically the allssh/iptables command is the same as with allowing access, with one exception: instead -A option, use -D option, allssh "sudo iptables -t filter -D WORLDLIST -p tcp -m tcp --dport 2009 -j ACCEPT", If you can still access the page after issuing this command, the most likely explanation is that there are multiple rules allowing access. Voici la méthode la plus rapide mais qui n’est pas à la portée de tous : l’arrêt du cluster et manuellement changer l’heure du cluster. Pour aller plus loin, vous pouvez même aller chercher dans les logs pour comprendre l’origine du problème : grep -i ntp data/logs/genesis.out. C’est pourquoi il est très important de le vérifier pendant la phase de recette de la plateforme avant la migration de workload. The following error will be observed in Prism Update 11/03/19 – Nutanix have updated the KB article on this alert and made it public. nutanix/4u. All Rights Reserved. On top of HTML5 based Prism GUI, Nutanix cluster has nifty web pages to give additional information on what is going on in your cluster. Une fois que vous avez attendu le temps nécessaire, vous pouvez redémarrer le cluster Nutanix grâce à la commande : cluster start. Detailed Statistics on Local CVM Connection to a Single Remote NTP Server. Sorry, we're still checking this file's contents to make sure it's safe to download. Could you please share the process to do maintanance for one ESXi Host. Pourquoi le NTP est-il tant problématique sur les CVM ? If you try to run it as root user, you will be prompted for root password on each of the nodes. Sorry, our virus scanner detected that this file isn't safe to download. The following example is a good result - showing the CVM NTP leader is synchronized with an external NTP server and the other CVMs are synchronized with the CVM NTP leader. Shut down the host. Please try again in a few minutes. Does anyone know of a way to initiate subsequent allssh commands only after the prior one running has completed? Welcome Here! Once you are connected, you will be at the SSH prompt, as shown below. how do we get around this? To check the NTP status on all CVMs, run the following command from one CVM: nutanix@cvm$ allssh ntpq -pn. The first line will kick off and before it has a chance to complete the second will kick off. If no ping packets are answered, the ESXi host is shut down. Premièrement, on part du principe que tous les flux firewall sont ouvert entre votre réseau de vmkernel ESXi (Management) / CVM et la target NTP (privée ou public). Pour l’activer, nous allons ajouter l’exécution du script dans le crontab de chaque CVM du cluster via la commande suivante : allssh ‘(/usr/bin/crontab -l && echo “*/5 * * * * bash -lc /home/nutanix/serviceability/bin/fix_time_drift”) | /usr/bin/crontab -‘, Vous pouvez vérifier l’offset de chaque CVM via la commande suivante : allssh grep offset ~/data/logs/genesis.out, Une fois que cet offset (négatif) arrive à 0 seconde ou devient positif (si jamais vous le laissez tourner plus longtemps que prévu), nous allons enlever l’exécution du script dans le crontab des CVM via la commande suivante :  Log in, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Nutanix: Error – Foundation service running on one of the nodes, HP Data Protector: How to stop a hanging session (Windows). Pourquoi le NTP est-il tant problématique sur les CVM ? If it fails with a message like the following, VMs are probably still running on the host. They are extremely helpful and will get the problem fixed in no time. Does the cvm time continue to be pushed back or is it stopped by what criteria? @hyoung ho Thank you for posting the query. As an example how to enable access to 2009 or Stargate page for a single CVM, iptables -t filter -A WORLDLIST -p tcp -m tcp --dport 2009 -j ACCEPT, Once you have enabled access, you access the information provided by the page, by launching web browser and entering CVM-IP-ADDRESS:2009 in the address field. You can run this command from any CVM. cfrancke Vanguard; 143 replies 3 years ago 14 June 2017.

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