11. vSphere HA Deep Dive: Troubleshooting Scenarios, Enhancing Availability | Expert Insights!
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- Опубликовано: 1 авг 2022
- 11. vSphere HA Deep Dive Troubleshooting - Part-1
Agenda
What is vSphere High Availability (HA)?
What are vSphere HA Architecture & Components?
What are all the vSphere HA Deep Dive Troubleshooting Scenarios?
Where can we find the vSphere HA Events during Troubleshooting?
Thank you
Please refer to the following playlist for your review.
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I must say you have the best vcenter playlist on RUclips my friend
Wow, thanks my friend!
Great initiative Sir.!
Thank you Sir
Agenda
What is vSphere High Availability (HA)?
What is vSphere HA Architecture & Components?
What are all the vSphere HA Deep Dive Troubleshooting Scenarios?
Where can we find the vSphere HA Events during Troubleshooting?
Thank you
Hello There. Thank you for the session. Really Informative.
Hi P A, Glad you enjoyed it! Thank you.
Awesome
Thank you
superb work !! thanks
Thanks a lot!
This sessions are very good. Thank you.
I got an error related to HA, "vsphere HA detected that host is in different network partition than the Master ". As per network team update there is no network issue. We tried to disable and enable the HA but didn't fixed.
How we can fix this issue
Hi,
The error message "Host is in a different network partition than the Master" in VMware vSphere usually indicates a network connectivity issue or a communication problem between ESXi hosts in a vSphere cluster.
Here are steps you can take to resolve this issue:
1. Verify Network Connectivity:
- Ensure that the affected ESXi host has proper network connectivity to other hosts in the cluster, especially to the vCenter Server and other ESXi hosts.
• try to ping the gateway from both of the hosts
• try to ping host 1 on host 2, try to ping host 2 on host 1
2. Check Network Partition Configuration:
- Verify that the network configuration for the ESXi hosts is correct and consistent. Check network settings, VLAN configurations, and subnet information to ensure they match across all hosts in the cluster.
• Validate the following
o VLAN config on port group
o VLAN config on network port
o MTU on port group/vmkernel
o MTU on physical network
3. Check vSphere HA Configuration:
- Ensure that vSphere High Availability (HA) is correctly configured. Check the vSphere HA settings and make sure that all hosts are part of the same cluster and HA is enabled.
4. Verify vSphere HA Heartbeat Datastore:
- Confirm that the vSphere HA heartbeat datastore is accessible and properly configured. This datastore is used by hosts in the cluster to exchange heartbeat information.
5. Review Logs:
- Examine the logs on the affected ESXi host for any errors or warnings. Look specifically in `/var/log/vmkernel.log` and `/var/log/fdm.log`. Check for network-related issues or communication problems.
6. Restart vSphere HA Agents:
- On the affected ESXi host, restart the vSphere HA agents. You can do this by connecting to the ESXi host via SSH and running the following commands:
/etc/init.d/hostd restart
/etc/init.d/vpxa restart
7. Resync vSphere HA:
- In the vSphere Web Client or vSphere Client, go to the "Cluster" view and navigate to "Configure" > "vSphere HA."
- Click "Edit" and disable, then re-enable vSphere HA. This action may trigger a resynchronization of the cluster.
8. Check for Datastore Heartbeat Issues:
- If using datastore heartbeat, ensure that the selected datastore is accessible and functioning correctly. If there are issues with the datastore, it can lead to network partition errors.
9. Review VMware KB Articles:
- Check the VMware Knowledge Base for any relevant articles related to the specific error message. VMware often provides detailed steps to resolve common issues.
kb.vmware.com/s/article/2012649
Thank you
❤ thanks sir truly i understand the concept of HA also FDm.log thanks again 🎉
You are most welcome Sir :-)
The way you are presenting simsple superb thank you it, and i have one doubt, if vCenter goes down the FDM Will work ?/ HA Will work ?
Thank you so much for your kind words!
Regarding your question, if vCenter goes down, the High Availability (HA) functionality is designed to continue working.
The vCenter server manages the configuration of HA, but once HA is set up, it operates independently.
The vCenter being unavailable won't impact the HA functionality, as long as the ESXi hosts are still up and running.
HA is meant to ensure the availability of VMs in case of host failures, and it relies on a specific configuration on the ESXi hosts themselves.
Hello brother, thanks for your valuable knowledge sharing with us ,one doubt from my end
**How do we cleanup the vCenter server disk usage from CLI ** when vCenter is having performance issue
Hi Brother,
Addressing your question, cleaning up vCenter server disk usage from the command-line interface (CLI) can certainly help alleviate performance issues.
Here's a general approach:
1. Log into vCenter Server: Access the vCenter Server via SSH or your preferred remote management tool.
2. Identify Disk Usage: Start by identifying which areas of the vCenter disk are consuming the most space. Common culprits are logs, temporary files, and old data.
3. Purge Old Logs: Clear out old log files that are no longer necessary. Logs can accumulate and consume a significant amount of space over time.
4. Delete Unnecessary Snapshots: If there are any snapshots that are no longer needed, removing them can free up substantial storage.
5. Check Database: If vCenter uses an external database, consider performing database maintenance tasks like optimizing, purging old records, or archiving data.
6. Remove Unneeded Historical Data: Adjust the retention policies for historical data like tasks, events, and performance data. Reducing the retention period can save disk space.
7. Compact Database: Some databases support compacting, which can recover space from deleted records. Consult your database documentation for guidance.
8. Check for Orphaned VMs: Ensure that there are no orphaned virtual machines or templates that can be safely removed.
9. Backup and Snapshot: Before making significant changes, take a backup or snapshot of your vCenter server to ensure you can revert if needed.
10. Execute Cleanup Commands: vCenter provides CLI commands for various cleanup tasks. For instance, you might use commands like `vcdb-export-log-purging` for database purging.
Remember, performing disk cleanup requires careful consideration to avoid accidental data loss. Always follow best practices, refer to official VMware documentation, and consider seeking assistance from VMware support if you're unsure about specific cleanup tasks.
For more details
kb.vmware.com/s/article/83070
kb.vmware.com/s/article/76563
Thank you
@@gnancloudgarage5238 thanks a lot brother
Hello
How to know the which is the master host in the cluster if we have like 10 12 host within cluster
Hi
How to Identify the Master Host in a VMware vCenter Cluster
1. Log in to vCenter:
Launch the VMware vSphere Client and enter your credentials to log in to your vCenter Server.
2. Select the Cluster:
From the vSphere Client dashboard, you can find and select the desired cluster you'd like to explore. Clusters group multiple ESXi hosts for effective resource management and high availability.
3. View Hosts:
In the right-hand section of the vSphere Client interface, click on the "Hosts" tab. This tab provides an overview of the hosts integrated within the selected cluster.
4. Analyze the "HA State" Column:
Within the "Hosts" tab, you'll observe a comprehensive list of the ESXi hosts that form part of the cluster. Here, focus on the "HA State" column, "High Availability State."
In the "HA State" column, you'll encounter designations such as "Primary" and "Secondary."
The host designated as "Primary" holds the role of the master host. It is responsible for orchestrating failover and overseeing the high availability mechanisms.
Your sessions are really good. How do i contact you ?
Thank you. here is the email - gnancloudgarage@gmail.com
What's the main difference between HA and DRS sir please answer
Hi Sir,
Here are the details for your review.
29. Rack Diagram Challenge & Solution: vSphere DRS, DPM, vCLs, Data Protection | Lab Guide & Uses!
ruclips.net/video/MPFoqiuX0D0/видео.htmlsi=G_K3lvUjs_Ns7WuJ
30. Exploring vSphere HA-Protection at Every Level, Failure Scenarios | Veeam | Perfect for Home Lab
ruclips.net/video/QBD9IDwxjOU/видео.htmlsi=RoeuZugUVlvb5wt3
VMware HA (High Availability) and DRS (Distributed Resource Scheduler) are two features of VMware vSphere that serve different purposes but are related to ensuring the availability and efficient resource management of virtualized environments.
Here's the main difference between the two:
1. VMware HA (High Availability):
- Purpose: VMware HA is primarily focused on ensuring high availability by protecting against host failures. It monitors the health of ESXi hosts and virtual machines.
- Functionality: In the event of a host failure, VMware HA automatically restarts the impacted virtual machines on other hosts within a cluster. It helps maintain the availability of your VMs in case of hardware failures.
- Use Case: VMware HA is essential for applications or services that require a high level of availability, and it's used to minimize downtime in the event of host failures.
2. VMware DRS (Distributed Resource Scheduler):
- Purpose: VMware DRS is focused on optimizing resource utilization and performance in a cluster. It balances the workload across multiple ESXi hosts to ensure efficient resource usage.
- Functionality: DRS constantly monitors the resource utilization of ESXi hosts within a cluster and automatically migrates VMs between hosts to distribute the load more evenly. This ensures that no host is overutilized or underutilized.
- Use Case: VMware DRS is particularly useful in environments with dynamic workloads where resource demands can vary over time. It helps improve performance and resource efficiency by load balancing.
In summary, VMware HA is about ensuring high availability by protecting against host failures and minimizing VM downtime during such events.
VMware DRS, on the other hand, is focused on optimizing resource utilization and performance by dynamically redistributing VMs across hosts to ensure balanced resource allocation.
These features can be used in combination to provide both high availability and resource optimization in a virtualized environment.
Thank you
@@gnancloudgarage5238 thanks for the help sir
sir can you plz explain windows sessions with wm ware
Hi Madam,
Sure, Kindly give me some time, and will do it for Windows 2022 during my spare time.
Thank you for your interest in Windows.
ruclips.net/video/T4JewBlbBwI/видео.html
Hi Madam,
Please let me know what concepts are you looking for
Hi Sir, the way you present the content is mind blowing. I am following your VMware series all lectures all contents are informative. I am facing an issue hope you guide me. I have three ESxi hosts are in vSAN cluster and HA DRS is enabled. While I am trying to initiate failover by shutting down one ESXi node. I am getting an error
"VSphere HA virtual machine failover failed". Where is the error i am not getting. This is my Lab environment. Waiting for your response.
Lab Setup
------------
host1 - vswitch0 for management and VM network
Host2 - vswitch1 vSAN network
Host3 vSwitch2 vMotion network
Hi Sir,
Thank you for your valuable feedback.
Here is the reference VMware KB for this issue
kb.vmware.com/s/article/2034571
Do you think vmware will be still used on-prem as most of the resources are being moved to the cloud providers like Microsoft Azure or AWS? Thank you
Hi P A,
It is a great question.
Yes, VMware vSphere is still running on-prem and customers are on their Digital transformation journey to Cloud experience.
• Some IT Infrastructures were already Moved to Public Cloud (AWS, Azure, GCP, IBM Cloud, etc.,), Testing and Dev Workloads only Moved to Public Cloud and not all Workloads.
• Most Organizations such as Govt. Industries, Banking sectors are recommended to use "Private Cloud" instead of "Public Cloud" due to their security Regulations.
• Those are moved to Private Cloud ( VMware VCF - vSphere, NSX-T, vSAN, vRealize & Azure Stack HCI, AWS Outposts, Google Anthos, SDDC, HCI, etc.,)
• In some scenarios, Organizations are started using Hybrid Cloud Infra - VMC on AWS, VMC on Azure & VMC on Google Engine
• Few Organizations are already utilizing Multicloud infrastructures ( For Multicloud Management - vRealize Automation, Morpheus, etc.,)
Therefore, VMware skill is still required in On-prem, Private Cloud, and Hybrid Cloud Environments.
Thank you
@@gnancloudgarage5238 Thank you very much for your response. Makes real sense and i will follow your videos as you upload. I will be giving my VCP in few months. Cheers
@@pa1089 Thank you.