vSphere Prerequisites and Resource Requirements
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This topic describes the prerequisites and resource requirements for installing Pivotal Container Service (PKS) on vSphere.
For prerequisites and resource requirements for installing PKS on vSphere with NSX-T integration, see vSphere with NSX-T Prerequisites and Resource Requirements.
PKS supports air-gapped deployments on vSphere with or without NSX-T integration.
You can also configure integration with the Harbor tile, an enterprise-class registry server for container images. For more information, see the VMware Harbor Registry documentation.
PKS on vSphere supports the following vSphere component versions:
Installing PKS deploys the following two virtual machines (VMs):
|Pivotal Container Service||1||4 GB||20 GB|
|Pivotal Ops Manager||1||8 GB||160 GB|
Each PKS deployment requires ephemeral VMs during installation and upgrades of PKS. After you deploy PKS, BOSH automatically deletes these VMs.
To enable PKS to dynamically create the ephemeral VMs when needed, ensure that the following resources are available in your vSphere infrastructure before deploying PKS:
|Ephemeral VM||Number||CPU Cores||RAM||Ephemeral Disk|
|BOSH Compilation VMs||4||4||4 GB||16 GB|
Each Kubernetes cluster provisioned through PKS deploys the VMs listed below. If you deploy more than one Kubernetes cluster, you must scale your allocated resources appropriately.
|VM||Number||CPU Cores||RAM||Ephemeral Disk||Persistent Disk|
|master||1 or 3||2||4 GB||8 GB||5 GB|
|worker||1 or more||2||4 GB||8 GB||10 GB|
|errand (ephemeral)||1||1||1 GB||8 GB||none|
The Pivotal Application Service (PAS) and PKS runtime platforms are both deployed by Ops Manager using BOSH. You can deploy both PAS and PKS using the same Ops Manager instance in a development or test environment, but we recommend that you deploy production installations of PAS and PKS to separate Ops Manager instances. For increased security, we recommend deploying each Ops Manager instance using a unique cloud provider account.
Separate installations of Ops Manager allow you to customize and troubleshoot runtime tiles independently. You may choose to configure Ops Manager with different settings for your PAS and PKS deployments. For example, PKS and many PAS features depend on BOSH DNS.
If you deploy PAS to a separate Ops Manager instance, you can disable BOSH DNS for troubleshooting purposes. PAS can run without BOSH DNS, but key features such as secure service credentials with CredHub, service discovery for container-to-container networking, and NSX-T integration do not work when BOSH DNS is disabled.
If you deploy PAS and PKS to the same Ops Manager instance, you cannot disable BOSH DNS without breaking your PKS installation along with the PAS features that depend on BOSH DNS.
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