VSAN Observer is a slick way to display diagnostic statics not only around how the VSAN is performing but how the VM’s are as well.
Here are the commands I entered in my Home Lab to enable and disable the Observer.
Note: this is a diagnostic tool and should not be allowed to run for long periods of time as it will consume many GB of disk space. Ctrl+C will stop the collection
How to Start the collection….
- vCenter239:~ # rvc root@localhost << Logon into vCenter Server Appliance | Note you may have to enable SSH
- /localhost> cd /localhost/Home.Lab
- /localhost/Home.Lab> cd computers/Home.Lab.C1 << Navigate to your cluster | Mine Datacenter is Home.Lab, and cluster is Home.Lab.C1
- /localhost/Home.Lab/computers/Home.Lab.C1> vsan.observer ~/computers/Home.Lab.C1 –run-webserver –force << Enter this command to get things started, keep in mind double dashes “—” are used in front of run-webserver and force
- [2014-09-17 03:39:54] INFO WEBrick 1.3.1
- [2014-09-17 03:39:54] INFO ruby 1.9.2 (2011-07-09) [x86_64-linux]
- [2014-09-17 03:39:54] WARN TCPServer Error: Address already in use – bind(2)
- Press <Ctrl>+<C> to stop observing at any point ...[2014-09-17 03:39:54] INFO WEBrick::HTTPServer#start: pid=25461 port=8010 << Note the Port and that Ctrl+C to stop
- 2014-09-17 03:39:54 +0000: Collect one inventory snapshot
- Query VM properties: 0.05 sec
- Query Stats on 172.16.76.231: 0.65 sec (on ESX: 0.15, json size: 241KB)
- Query Stats on 172.16.76.233: 0.63 sec (on ESX: 0.15, json size: 241KB)
- Query Stats on 172.16.76.232: 0.68 sec (on ESX: 0.15, json size: 257KB)
- Query CMMDS from 172.16.76.231: 0.74 sec (json size: 133KB)
- 2014-09-17 03:40:15 +0000: Live-Processing inventory snapshot
- 2014-09-17 03:40:15 +0000: Collection took 20.77s, sleeping for 39.23s
- 2014-09-17 03:40:15 +0000: Press <Ctrl>+<C> to stop observing
How to stop the collection… Note: the collection has to be started and running to web statics as in the screenshots below
- ^C2014-09-17 03:40:26 +0000: Execution interrupted, wrapping up … << Control+C is entered and the observer goes into shutdown mode
- [2014-09-17 03:40:26] INFO going to shutdown …
- [2014-09-17 03:40:26] INFO WEBrick::HTTPServer#start done.
How to launch the web interface…
I used Firefox to logon to the web interface of VSAN Observer, IE didn’t seem to function correctly
Simply go to http://[IP of vCenter Server]:8010 Note: this is the port number noted above when starting and its http not https
So what does it look like and what is the purpose of each screen… Note: By Default the ‘? What am I looking at’ is not displayed, I expanded this view to enhance the description of the screenshot.
Well folks it’s my long awaited blog post around moving my Homelab from FreeNAS to VMware VSAN.
Here are the steps I took to migrate my Home Lab GEN II with FreeNAS to Home Lab GEN III with VSAN.
- I am not putting a focus on ESXi setup as I want to focus on the steps to setup VSAN.
- My home lab is in no way on the VMware HCL, if you are building something like this for production you should use the VSAN HCL as your reference
The Plan –
- Meet the Requirements
- Backup VM’s
- Update and Prepare Hardware
- Distribute Existing hardware to VSAN ESXi Hosts
- Install ESXi on all Hosts
- Setup VSAN
The Steps –
Meet the Requirements – Detailed list here
- Minimum of three hosts
- Each host has a minimum of one SSD and one HDD
- The host must be managed by vCenter Server 5.5 and configured as a Virtual SAN cluster
- Min 6GB RAM
- Each host has a Pass-thru RAID controller as specified in the HCL. The RAID controller must be able to present disks directly to the host without a RAID configuration.
- 1GB NIC, I’ll be running 2 x 1Gbs NICs. However 10GB and Jumbo frames are recommended
- VSAN VMkernel port configured on every host participating in the cluster.
- All disks that VSAN will be allocated to should be clear of any data.
Backup Existing VMs
- No secret here around backups. I just used vCenter Server OVF Export to a local disk to backup all my critical VM’s
- More Information Here
Update and Prepare Hardware
- Update all Motherboard (Mobo) BIOS and disk Firmware
- Remove all HDD’s / SDD’s from FreeNAS SAN
Remove any Data from HDD/SDD’s . Either of these tools do the job
Distribute Existing hardware to VSAN ESXi Hosts
- Current Lab – 1 x VMware Workstation PC, 2 x ESXi Hosts boot to USB (Host 1 and 2), 1 x FreeNAS SAN
- Desired Lab – 3 x ESXi hosts with VSAN and 1 x Workstation PC
End Results after moves
- All Hosts ESXi 5.5U1 with VSAN enabled
- Host 1 – MSI 7676, i7-3770, 24GB RAM, Boot 160GB HDD, VSAN disks (2 x 2TB HDD SATA II, 1 x 60GB SSD SATA III), 5 xpNICs
- Host 2 – MSI 7676, i7-2600, 32 GB RAM, Boot 160GB HDD, VSAN disks (2 x 2TB HDD SATA II, 1 x 90 GB SSD SATA III), 5 x pNICs
- Host 3 – MSI 7676, i7-2600, 32 GB RAM, Boot 160GB HDD, VSAN disks (2 x 2TB HDD SATA II, 1 x 90 GB SSD SATA III), 5 x pNICs
- Note – I have ditched my Gigabyte z68xp-UD3 Mobo and bought another MSI 7676 board. I started this VSAN conversion with it and it started to give me fits again similar to the past. There are many web posts with bugs around this board. I am simply done with it and will move to a more reliable Mobo that is working well for me.
Install ESXi on all Hosts
Starting with Host 1
- Prior to Install ensure all data has been removed and all disk show up in BIOS in AHCI Mode
Install ESXi to Local Boot HD
- After the install I experienced the ESXi hanging at Boot – ‘Starting up Services – Running usbarbitrator start’
- Solution – Stop usbarbitrator service
- Setup ESXi base IP address via direct Console, DNS, disable IP 6, enable shell and SSH
- Using the VI Client setup the basic ESXi networking and vSwitch
- Using VI Client I restored the vCSA and my AD server from OVF and powered them on
- Once booted I logged into the vCSA via the web client
- I built out Datacenter and add host 1
- Create a cluster but only enabled EVC to support my different Intel CPU’s
- Cleaned up any old DNS settings and ensure all ESXi Hosts are correct
- From the Web client Validate that 2 x HDD and 1 x SDD are present in Host
- Installed ESXi Host 2 / 3, followed most of these steps, and added them to the cluster
Logon to the Webclient
Ensure on all the hosts
- Networking is setup and all functions are working
- NTP is working
- All expected HDD’s for VSAN are reporting in to ESXi
Create a vSwitch for VSAN and attach networking to it
- I attached 2 x 1Gbs NICs for my load that should be enough
Assign the VSAN License Key
- Click on the Cluster > Manage > Settings > Virtual SAN Licensing > Assign License Key
- Under Virtual SAN click on General then Edit
- Choose ‘Turn on Virtual SAN’
- Set ‘Add disks to storage’ to Manual
Note – for a system on the HCL, chances are the Automatic setting will work without issue. However my system is not on the any VMware HCL and I want to control the drives to add to my Disk Group.
Add Disks to VSAN
- Under Virtual SAN click on ‘Disk Management’
- Choose the ICON with the Check boxes on it
- Finally add the disks you want in your disk group
- Allow VSAN to complete its tasks, you can check on its progress by going to ‘Tasks’
- Once complete ensure all disks report in as healthy.
Ensure VSAN General tab is coming up correct
- 3 Hosts
- 3 of 3 SSD’s
- 6 of 6 Data disks
- Check to see if the data store is online
Migrating from FreeNAS to VSAN was relatively a simple process. I simply moved, prepared, and installed and the product came right up. My only issue was working with a faulty Gigabyte Mobo which I resolved by replacing it. I’ll post up more as I continue to work with VSAN. If you are interested in more detail around VSAN I would recommend the following book.