crd-code-generation

Example repository for the blog post Kubernetes Deep Dive: Code Generation for CustomResources.

Installation

export GOPATH=~/go
go get github.com/bingerambo/crd-code-generation

Getting Started

First register the custom resource definition:

kubectl apply -f deployment/nodecache-crd.yaml

Then add an example of the NodeCache kind for Node(nodename:node1):

kubectl apply -f deployment/node1.yaml

Finally build and run the example:

cd ~/go/src/github.com/bingerambo/crd-code-generation/cmd/nodecache/
go build
./nodecache -kubeconfig ~/.kube/config

Example log print info:

========================================
ADD NodeCache ... 
setNodeCache: {Name:node1 Datasets:4e1d6a39e550ee41&5&0;8e1d6a39e550ee4x&5&1 FreeSize:100 AllocatableSize:380} 
========================================
ADD NodeCache ... 
setNodeCache: {Name:node3 Datasets:4e1d6a39e550ee41&5&0;8e1d6a39e550ee4x&5&1 FreeSize:0 AllocatableSize:0} 
========================================
ADD NodeCache ... 
setNodeCache: {Name:node2 Datasets:4e1d6a39e550ee41&5&0 FreeSize:0 AllocatableSize:0} 
========================================
DELETE NodeCache ... 
deleteNodeCache: node3 
========================================
ADD NodeCache ... 
setNodeCache: {Name:node3 Datasets:4e1d6a39e550ee41&5&0;8e1d6a39e550ee4x&5&1 FreeSize:0 AllocatableSize:0} 


#######################################################
mem cache lister...
*NcItem Struct was not found for node1
*NcItem Struct was not found for node2
*NcItem Struct was not found for node3
#######################################################
========================================
ADD NodeCache ... 
setNodeCache: {Name:node1 Datasets:4e1d6a39e550ee41&5&0;8e1d6a39e550ee4x&5&1 FreeSize:100 AllocatableSize:380} 
setMemCache: &{Name:node1 Datasets:4e1d6a39e550ee41&5&0;8e1d6a39e550ee4x&5&1 FreeSize:100 AllocatableSize:380} 
========================================
ADD NodeCache ... 
setNodeCache: {Name:node3 Datasets:4e1d6a39e550ee41&3334445&0;8e1d6a39e550ee4x&5&1 FreeSize:0 AllocatableSize:0} 
setMemCache: &{Name:node3 Datasets:4e1d6a39e550ee41&3334445&0;8e1d6a39e550ee4x&5&1 FreeSize:0 AllocatableSize:0} 
========================================
ADD NodeCache ... 
setNodeCache: {Name:node2 Datasets:4e1d6a39e550ee41&5&0 FreeSize:0 AllocatableSize:0} 
setMemCache: &{Name:node2 Datasets:4e1d6a39e550ee41&5&0 FreeSize:0 AllocatableSize:0} 



#######################################################
mem cache lister...
setMemCache: &{Name:node1 Datasets:4e1d6a39e550ee41&5&0;8e1d6a39e550ee4x&5&1 FreeSize:100 AllocatableSize:380} 
setMemCache: &{Name:node2 Datasets:4e1d6a39e550ee41&5&0 FreeSize:0 AllocatableSize:0} 
setMemCache: &{Name:node3 Datasets:4e1d6a39e550ee41&3334445&0;8e1d6a39e550ee4x&5&1 FreeSize:0 AllocatableSize:0} 
#######################################################



#######################################################
mem cache lister...
setMemCache: &{Name:node1 Datasets:4e1d6a39e550ee41&5&0;8e1d6a39e550ee4x&5&1 FreeSize:100 AllocatableSize:380} 
setMemCache: &{Name:node2 Datasets:4e1d6a39e550ee41&5&0 FreeSize:0 AllocatableSize:0} 
setMemCache: &{Name:node3 Datasets:4e1d6a39e550ee41&3334445&0;8e1d6a39e550ee4x&5&1 FreeSize:0 AllocatableSize:0} 
#######################################################
========================================
UPDATE NodeCache ... 
setNodeCache: {Name:node3 Datasets:4e1d6a39e550ee41&5&0;8e1d6a39e550ee4x&5&1 FreeSize:0 AllocatableSize:0} 
setMemCache: &{Name:node3 Datasets:4e1d6a39e550ee41&5&0;8e1d6a39e550ee4x&5&1 FreeSize:0 AllocatableSize:0} 



#######################################################
mem cache lister...
setMemCache: &{Name:node1 Datasets:4e1d6a39e550ee41&5&0;8e1d6a39e550ee4x&5&1 FreeSize:100 AllocatableSize:380} 
setMemCache: &{Name:node2 Datasets:4e1d6a39e550ee41&5&0 FreeSize:0 AllocatableSize:0} 
setMemCache: &{Name:node3 Datasets:4e1d6a39e550ee41&5&0;8e1d6a39e550ee4x&5&1 FreeSize:0 AllocatableSize:0} 
#######################################################