k8gb-light

POC k8gb reduced by CRD. Besides CRD it also reduces the number of reconciliations and provides new providers as Gateway.

see 🚨Changes which contain more detailed information about the changes.

running locally

Environments

Locally create three test clusters by displaying make-deploy-full-local-setup. All clusters will have the current version of k8gb installed from your local Git branch.

Test application

To install the application, use make deploy-demo

Terratests

Run make terratest.

If you need to reset the environment, use the commands make clean-namespaces, make deploy-full-local-clusters, make redeploy-clusters

Ingress

If k8gb is successfully installed, you only need to add the annotation to ingress and load-balancing will be enabled.

• k8gb.io/strategy is mandatory
• k8gb.io/status is out only information written by controller back to ingress. The value represents the state of the host application on each cluster.
• k8gb.io/primary-geotag is used if k8gb.io/strategy is failover. Defines primary cluster and all substitutes within the list. Substitutes that are not defined are automatically ordered alphabetically e.g: for clusters us,uk,za,cn,eu,k8gb.io/primary-geotag: us,eu the clusters are selected in the following order us,eu,cn,uk,za
• k8gb.io/weights is list containing key-values for the weights of the individual regions e.g: k8gb.io/weights: "eu:4,us:5,za:2". Weights are applied if k8gb.io/strategy is roundRobin.

Other annotations are k8gb.io/splitbrain-threshold-seconds and k8gb.io/dns-ttl-seconds

kind: Ingress
metadata:
  annotations:
    k8gb.io/dns-ttl-seconds: "351"
    k8gb.io/status: '{"serviceHealth":{"demo.cloud.example.com":"Healthy"},"healthyRecords":{"demo.cloud.example.com":["172.18.0.5","172.18.0.6","172.18.0.3","172.18.0.4"]},"geoTag":"us","hosts":"demo.cloud.example.com"}'
    k8gb.io/strategy: roundRobin
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"networking.k8s.io/v1","kind":"Ingress","metadata":{"annotations":{"k8gb.io/strategy":"roundRobin","x.y.io/ep":"[{\"addresses\":[\"1.2.3.4\"],\"port\":80}]","xxx":"xxx"},"name":"ing","namespace":"demo"},"spec":{"ingressClassName":"nginx","rules":[{"host":"demo.cloud.example.com","http":{"paths":[{"backend":{"service":{"name":"frontend-podinfo","port":{"name":"http"}}},"path":"/","pathType":"Prefix"}]}}]}}

  endpoints:
  - dnsName: localtargets-demo.cloud.example.com
    recordTTL: 351
    recordType: A
    targets:
    - 172.18.0.5
    - 172.18.0.6
  - dnsName: demo.cloud.example.com
    labels:
      strategy: roundRobin
    recordTTL: 351
    recordType: A
    targets:
    - 172.18.0.5
    - 172.18.0.6
    - 172.18.0.3
    - 172.18.0.4