[Playground]Provision a k8s cluster with terraform & kubeadm and use Calico as CNI on Azure

The code can be found in github https://github.com/Shuanglu/k8s_infra_azure

There are some limitations like Calico CIDR is using the default one. I’m working on a golang program to provide more customization.

[Architecture]

[Provision Process]

[Terraform]

In the terraform template, you could assign value to below variables:

• resource_group_name: [string] The name of the infra resource group
• location: [string] The location of the resources
• user_assigned_identity: [string] The name of the user assigned identity
• vnet: [string] The name of the Vnet
• address_space: [list(string)] The address space of the VNet including master,agent,bastion
• admin_username: [string] The name of the admin user. Username requirement: https://docs.microsoft.com/en-us/azure/virtual-machines/linux/faq#what-are-the-username-requirements-when-creating-a-vm
• admin_password: [string] The password of the admin user. Password requirement: https://docs.microsoft.com/en-us/azure/virtual-machines/linux/faq#what-are-the-password-requirements-when-creating-a-vm
• storageAccount: [string] The name of the StorageAccount
• bastion_domain_name_label: [string] The name of the apiserver fqdn. Please follow the link https://docs.microsoft.com/en-us/rest/api/virtualnetwork/checkdnsnameavailability/checkdnsnameavailability to check the availability
• publickey_path: [string] The path of the public key
• bastion_vm_name: [string] The name of the bastion vm. Name requirement: https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/resource-name-rules#microsoftcompute
• master_domain_name_label: [string] The name of the apiserver fqdn. Please follow the link https://docs.microsoft.com/en-us/rest/api/virtualnetwork/checkdnsnameavailability/checkdnsnameavailability to check the availability
• master_vmss_name: [string] The name of the master vmss. Name requirement: https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/resource-name-rules#microsoftcompute
• agent_vmss_name: [string] The name of the agent vmss. Name requirement: https://docs.microsoft.com/en-us/azure/azure-resource-manager/management/resource-name-rules#microsoftcompute

[Reference]

https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/high-availability/

https://kubernetes.io/docs/setup/best-practices/certificates/