Azure Kubernetes - 'az acs create'并超出免费帐户配额

Question

尝试为我的MongoDB on GKE blog post做相当于Azure Container Services的服务，但在第一个障碍时失败。我的博客文章基于使用每个云提供商的免费级别/帐户中提供的配额，以帮助新用户在继续使用付费级别之前评估选项。然而，创建一个Azure免费帐户后，我似乎无法创建一个处于“核心限制”下的k8s群集（在这种情况下，我认为这意味着保持在与“vCPU”等效的自由阈值之下）。

当我运行如下：

az acs create --orchestrator-type kubernetes --resource-group MongoResourceGroup --name MongoK8sCluster --generate-ssh-keys 

结果是：

Deployment failed. { "code": "BadRequest", "message": "An error has occurred in subscription 0657d162-d822-48f5-bbe9-4bcaac4f40e4, zesourceGroup: MongoResourceGroup request: Provisioning of resource(s) for container service MongoK8sCluster in resource group MongoResourceGroup failed. Message: {\n \"code\": \"QuotaExceeded\",\n \"message\": \"Provisioning of resource(s) for container service MongoK8sCluster in resource group MongoResourceGroup failed. Message: Operation results in exceeding quota limits of Core. Maximum allowed: 4, Current in use: 0, Additional requested: 8.. Details: \"\n }. Details: <no value>." 

我试图指定较小的VM的类型，但我似乎并没有完全得到有：

az acs create --orchestrator-type kubernetes --resource-group MongoResourceGroup --name MongoK8sCluster --agent-vm-size Standard_A0 --generate-ssh-keys 

Deployment failed. { "code": "BadRequest", "message": "An error has occurred in subscription 0657d162-d822-48f5-bbe9-4bcaac4f40e4, resourceGroup: MongoResourceGroup request: Provisioning of resource(s) for container service MongoK8sCluster in resource group MongoResourceGroup failed. Message: {\n \"code\": \"QuotaExceeded\",\n \"message\": \"Provisioning of resource(s) for container service MongoK8sCluster in resource group MongoResourceGroup failed. Message: Operation results in exceeding quota limits of Core. Maximum allowed: 4, Current in use: 0, Additional requested: 5.. Details: \"\n }. Details: <no value>. 

任何关于让k8s样本项目核心数减少到足以在免费账户阈值内的建议？

Answer 1

根据此处的文档https://docs.microsoft.com/en-us/cli/azure/acs#create默认agent-count是3，默认master-vm-size是标准D2_v2。这使得核心要求是

3(agents)*1(core) + 1(master)*2(core) = 5 

既然你有4个核心可用，你应该尝试设置：

1. agent-count to be 3 
2. agent-vm-size to be Standard_A0 

或

1. agent-count to be 1 
2. agent-vm-size to be Standard_D11_v2 

我宁愿选择（2），因为这将在代理节点上提供足够的内存和IOPS。将master-vm-size默认设置为Standard D2_v2，因为etcd和kubenetes容器需要足够的内存进行操作。

Answer 2

使用以下配置将会有所帮助。

• --master计数1 => Standard_A2（2 CPU）=> 2 CPU
• --agent计数2 => Standard_A1（1个CPU X 2）=> 2 CPU

这种配置将创建一个集群，在免费帐户限制

az acs create -n "your-kubernetes-cluster" -g your-resource-group --master-vm-size Standard_A2 --agent-count 2 --agent-vm-size Standard_A1 --dns-prefix kube --orchestrator-type kubernetes --debug