List of available fields for webhookTemplate

[adrianmiron]

[adrianmiron]

Hi,

I am interested in getting a list of available variables i can reference in the webhookTemplate. Is there a list somewhere ? I would mostly want the ASG name/tags/info/etc .

Right now the documentation shows :
{"text":"[NTH][Instance Interruption] EventID: {{ .EventID }} - Kind: {{ .Kind }} - Instance: {{ .InstanceID }} - Description: {{ .Description }} - Start Time: {{ .StartTime }}"}

Looking through logs i can see it refence stuff like accountID, instanceType, but nothing related to the ASG.

Thanks

[bwagner5]

Currently, ASG name and tags are not available to be used in the webhook template. There's another issue out to add node labels to the webhook template as well #265. I don't think it would take that much work to add these.

The current fields you can use are:

aws-node-termination-handler/pkg/ec2metadata/ec2metadata.go

Lines 105 to 116 in 23b97f4

	// NodeMetadata contains information that applies to every drain event
	type NodeMetadata struct {
	AccountId string `json:"accountId"`
	InstanceID string `json:"instanceId"`
	InstanceType string `json:"instanceType"`
	PublicHostname string `json:"publicHostname"`
	PublicIP string `json:"publicIp"`
	LocalHostname string `json:"localHostname"`
	LocalIP string `json:"privateIp"`
	AvailabilityZone string `json:"availabilityZone"`
	Region string `json:"region"`
	}

aws-node-termination-handler/pkg/monitor/types.go

Lines 26 to 36 in 23b97f4

	type InterruptionEvent struct {
	EventID string
	Kind string
	Description string
	State string
	NodeName string
	InstanceID string
	StartTime time.Time
	EndTime time.Time
	Drained bool
	InProgress bool

and here is where those two structs are combined:

aws-node-termination-handler/pkg/webhook/webhook.go

Lines 32 to 36 in 23b97f4

	type combinedDrainData struct {
	ec2metadata.NodeMetadata
	monitor.InterruptionEvent
	InstanceID string
	}

[adrianmiron]

Thanks for the reply, looking forward to the new fields :)

[mmingorance-dh]

I was wondering if it would be possible to add extra tags. We for example would like to set a tag to differentiate each requests from which Kubernetes cluster come from.
Would be possible to maybe add the instance tags?

[imuqtadir]

@mmingorance-dh Currently, we are showing NodeLabels maybe you can use that? Regardless, feel free to open an issue or put out a PR for it.

[mmingorance-dh]

@imuqtadir thanks for sharing! Does that attribute allow you show just one particular label?
Example: {{ .NodeLabels.MyLabelName }}

Also, I saw the latest release still doesn't have this attribute. When will the next release happen?

[imuqtadir]

@mmingorance-dh Yes, it does. You can refer to my PR which has some detailed examples of what you can use within webhook template related to NodeLabels. Here: #382

We are yet to release these changes. I'll try and get the release going in coming week.