Kubernetes

The Kubernetes component lookup fetches kubernetes resources to be used as components.

kube-configmap-components.yaml
---
apiVersion: canaries.flanksource.com/v1
kind: Topology
metadata:
  name: kubernetes-configs
spec:
  type: Config
  icon: kubernetes
  schedule: "@every 5m"
  components:
    - name: configs
      icon: server
      type: ConfigMap
      lookup:
        kubernetes:
          - kind: ConfigMap
            display:
              expr: |
                dyn(results).map(c, {
                  'name': c.Object.metadata.name,
                  'type': 'ConfigMap',
                }).toJSON()

Field	Description	Scheme	Required
display	Template to display query results in text (overrides default bar format for UI)	Template
ignore	Ignore the specified resources from the fetched resources. Can be a glob pattern.	[]string
kind	Specifies the kind of Kubernetes object for interaction	string	Yes
labels	Labels for the check	string
namespace	Specifies namespace for Kubernetes object	ResourceSelector
ready	Boolean value of true or false to query and display resources based on availability	bool
resource	Queries resources related to specified Kubernetes object	ResourceSelector
transform	Template to transform results to	Template

ResourceSelector

Field	Description	Scheme	Required
name	Name of Kubernetes resource	string
labelSelector	Select Kubernetes resource based on label. e.g. app, canary.	string
fieldSelector	Select Kubernetes resource based on the value of specified resource field	string

Results

The results variable in the template is itself a list of all the kubernetes resources.

Remote clusters

A single canary-checker instance can connect to any number of remote clusters via custom kubeconfig. Either the kubeconfig itself or the path to the kubeconfig can be provided.

From kubernetes secret

remote-cluster.yaml
---
apiVersion: canaries.flanksource.com/v1
kind: Topology
metadata:
  name: kubernetes-configs
spec:
  type: Config
  icon: kubernetes
  schedule: "@every 5m"
  components:
    - name: configs
      icon: server
      type: ConfigMap
      lookup:
        kubernetes:
          - kind: ConfigMap
            display:
              expr: |
                dyn(results).map(c, {
                  'name': c.Object.metadata.name,
                  'type': 'ConfigMap',
                }).toJSON()
        kubeconfig:
          valueFrom:
            secretKeyRef:
              name: aws-kubeconfig
              key: kubeconfig

Kubeconfig inline

remote-cluster.yaml
apiVersion: canaries.flanksource.com/v1
kind: Topology
metadata:
  name: kubernetes-configs
spec:
  type: Config
  icon: kubernetes
  schedule: "@every 5m"
  components:
    - name: configs
      icon: server
      type: ConfigMap
      lookup:
        kubernetes:
          - kind: ConfigMap
            display:
              expr: |
                dyn(results).map(c, {
                  'name': c.Object.metadata.name,
                  'type': 'ConfigMap',
                }).toJSON()
        kubeconfig:
          value: |
            apiVersion: v1
            clusters:
                - cluster:
                    certificate-authority-data: xxxxx
                    server: https://xxxxx.sk1.eu-west-1.eks.amazonaws.com
                  name: arn:aws:eks:eu-west-1:765618022540:cluster/aws-cluster
            contexts:
                - context:
                    cluster: arn:aws:eks:eu-west-1:765618022540:cluster/aws-cluster
                    namespace: mission-control
                    user: arn:aws:eks:eu-west-1:765618022540:cluster/aws-cluster
                  name: arn:aws:eks:eu-west-1:765618022540:cluster/aws-cluster
            current-context: arn:aws:eks:eu-west-1:765618022540:cluster/aws-cluster
            kind: Config
            preferences: {}
            users:
                - name: arn:aws:eks:eu-west-1:765618022540:cluster/aws-cluster
                  user:
                    exec:
                        ....

From local filesystem

remote-cluster.yaml
apiVersion: canaries.flanksource.com/v1
kind: Topology
metadata:
  name: kubernetes-configs
spec:
  type: Config
  icon: kubernetes
  schedule: "@every 5m"
  components:
    - name: configs
      icon: server
      type: ConfigMap
      lookup:
        kubernetes:
          - kind: ConfigMap
        display:
          expr: |
            dyn(results).map(c, {
              'name': c.name,
              'type': 'ConfigMap',
            }).toJSON()
        kubeconfig:
          value: /root/.kube/aws-kubeconfig