GoCloud work summary

Ali-cloud, Vultr, modular, builder pattern, parsing response

In GSoC 2018, I implemented Ali-cloud and Vultr support for GoCloud. And other works: GoCloud modular, builder pattern for inputting, parsing response.

Ali-cloud and Vultr support

Ali-cloud modules implemented:

• ECS Compute
• ECS Storage
• Alibaba Cloud DNS
• Server Load Balancer
• Container Service

Vultr modules implemented:

• Server
• Bare Metal
• Block Storage
• DNS

For every implementation of modules and functions, contains unit tests, API documentations, example documentations and getting start tutorial video.

Ali-cloud tutorial video list

Vultr tutorial video list

GoCloud modular

Achieved three goals:

• way to call: GoCloud.<ServiceType>.<Functionality>
• development scalable
• ensure the API is uniform like before

Implemented the way to call like this

gocloud.AmazonProvider().MachineLearning().CreateMLModel()

More information about GoCloud modular

Builder pattern for inputting parameters

Achieved four goals:

• Prevent user from inputting wrong parameter name
• Throw an error when user miss input required parameters
• Let user add parameters in different places
• Let user have higher freedom, clearer code

Code of using builder pattern for inputting parameters:

alicloud, _ := gocloud.CloudProvider(gocloud.Aliprovider)
createNodeBuilder := ecs.NewCreateNodeBuilder().
	RegionID("cn-qingdao").
	ImageID("centos_7_04_64_20G_alibase_201701015.vhd").
	InstanceType("ecs.xn4.small").
	SecurityGroupID("sg-m5egbo9s5xb21kpu6nk2")
createNode, err := createNodeBuilder.Build()

if err != nil {
	// May miss required parameters
}
resp, err := alicloud.Createnode(createNode)

Ali-cloud and Vultr are support builder pattern input now.

More information about Builder pattern for inputting parameters

Parsing response

Achieved two goals:

• users get the response struct directly
• put HTTP/HTTPS status code into response struct

Code of parsing response of AttachNodeWithLoadBalancer():

resp, err := alilb.AttachNodeWithLoadBalancer(attach)
if err != nil {
    fmt.Println(err)
    return
}
attachLBResp, err := alilb.ParseAttachLoadBalancerResp(resp)
if err != nil {
    fmt.Println(err)
    return
}
if attachLBResp.StatusCode == 200 {
    fmt.Println(attachLBResp.LoadBalancerId)

    node1 := attachLBResp.BackendServers.BackendServer[0]

    fmt.Println(node1.ServerId)
    fmt.Println(node1.Weight)
    fmt.Println(node1.Type)
}

For Ali-cloud, functions implemented:

• ParseCreateNodeResp()
• ParseCreateClusterResp()
• ParseListDnsResp()
• ParseCreateDiskResp()
• ParseCreateLoadBalancerResp()
• ParseAttachLoadBalancerResp()
• ParseDetachLoadBalancerResp()

For Vultr, functions implemented:

• ParseListDnsResp()
• ParseCreateDiskResp()
• ParseCreateNodeResp()
• ParseCreateBareMetalResp()
• ParseListBareMetalResp()