please I need some help in determining the VXRAIL deployment options and if DNS is internal or external using pictures, I need it for exam preparation and I having some doubt about the answer, please if any one can help me, the pictures are attached
Quick answer: Based on the screenshot, the VxRail appears to be using a Standard VxRail deployment with an External vCenter. This can be determined since no vCenter VM is listed in the cluster and this is not a VCF on VxRail deployment since it has no VCF on VxRail related VMs. Question by question responses:
Answer: In the vSphere Client, in the Hosts and Clusters view select an ESXi host. Select the Monitor tab in the middle pane, scroll down, and then select VxRail > Physical View. The VxRail Model is displayed.
Answer: In the vSphere Client, select the VxRail Manager VM, and select LAUNCH WEB CONSOLE. Log in as root and the associated password. Perform an nslookup for the VxRail Manager FQDN. If the address of the DNS Server is the same as the VxRail Manager then it is using Internal DNS (dnsmasq service on the VxRail Manager VM), otherwise it is using an External DNS. The example below shows an External DNS server since it is not the same IP address as the VxRail Manager:
And how can one determine if internal vCenter deployed is with internal DNS? I can't found anything in documents and in HTML5 client is nothing to find regarding vCenter DNS.
Browse to the vCenter Server Appliance Management Interface (VAMI) at https://<vCenter FQDN|IP>:5480 and login as root. Check the DNS settings: Select Networking > DNS Servers. If the address of the DNS Server is the same as the VxRail Manager, then vCenter is using VxRail Manager for DNS (Internal DNS), otherwise it is an external DNS. The example below is using an External DNS server since the IP address is different than that of my VxRail Manager (192.168.10.16):
Referring to the pictures are my answers correct?
for first picture Its internal vcenter and external DNS since when we select internal vcenter it will be automatic change to external DNS
for the second picture its customer supplied VDS since there is multiple clusters managed by same vcenter.
Greetings, the most definitive way to determine if a vCenter is External or Embedded in the context of VxRail is by browsing to the OpenAPI of each vCenter and executing the /v1/vc/mode request previously detailed in this discussion. The picture displayed is suggestive, but not definitive. A vCenter hosted inside a VxRail cluster maybe either Embedded or External. Example, in the case of VCF on VxRail, vCenters start as Embedded and are converted to External, which changes the lifecycle management responsibility from VxRail Manager to SDDC Manager (A VCF on VxRail component). Being an External vCenter indicates lifecyle management is not handled by VxRail Manager, it does not indicate the location of the vCenter. In VCF on VxRail, vCenter(s) are hosted inside a VxRail cluster, but are External in the context of lifecycle management. These nuances are why I suggest using the OpenAPI approach for a definitive answer.
i got this question in the simulator and you can only browse the vxrail manager monitor and configuration tab and the vsphere menu.
any idea how to verify if internal DNS or external by only browsing through those?
Greetings, in the vSphere Client, in the "Hosts and Clusters" view, select an ESXi host in the left pane. In the right pane select the "Configure" tab. Under the "Networking" section select "TCP/IP configuration". Notice the column entitled "Preferred DNS server". If the IP address of the "Preferred DNS server" matches the VxRail Manager's IP, then it must be an Internal DNS, i.e. the VxRail Manager system hosts DNS.
The VxRail Manager's IP address is visible in the "Hosts and Clusters" view when highlighting the VxRail Manager VM. In the "Summary" tab in the right pane look for the "IP Addresses" field. This data comes from VMware Tools installed on the Guest OS (VxRail Manager). In my example, the "Preferred DNS server" value is 192.168.10.1, while my VxRail Manager's IP address is 192.168.10.16, therefore, the environment in my example must be using an "External" DNS server.