Using Client-go to implement K8S operations

This is a creation in Article, where the information may have evolved or changed. Package Main


Import (
"Flag"
"FMT"
"K8s.io/client-go/1.4/kubernetes"
"K8s.io/client-go/1.4/pkg/api"
"K8s.io/client-go/1.4/pkg/api/unversioned"
"K8s.io/client-go/1.4/pkg/api/v1"
"K8s.io/client-go/1.4/tools/clientcmd"
"Log"
)


VAR (
Kubeconfig = flag. String ("Kubeconfig", "./config", "absolute path to the Kubeconfig file")
)


Func Main () {
Flag. Parse ()
Uses the current context in Kubeconfig
Config, err: = Clientcmd. Buildconfigfromflags ("116.213.205.180:8080", *kubeconfig)
If err! = Nil {
Panic (err. Error ())
}
Creates the Clientset
Clientset, err: = Kubernetes. Newforconfig (config)
If err! = Nil {
Panic (err. Error ())
}
Create pod
Pod: = new (v1. POD)
Pod. Typemeta = unversioned. Typemeta{kind: "Pod", Apiversion: "V1"}
Pod. Objectmeta = v1. Objectmeta{name: "Testapi", Namespace: "Default", labels:map[string]string{"Name": "Testapi"}}
Pod. Spec = v1. podspec{
Restartpolicy:v1. Restartpolicyalways,
Containers: []v1. container{
V1. container{
Name: "Testapi",
Image: "Nginx",
Ports: []v1. containerport{
V1. containerport{
CONTAINERPORT:80,
Protocol:v1. PROTOCOLTCP,
},
},
},
},
}
_, Err = Clientset. Core (). Pods ("Default"). Create (POD)
If err! = Nil {
Panic (err. Error ())
}
Get the number of existing pods
Pods, err: = Clientset. Core (). Pods (""). List (API. listoptions{})
If err! = Nil {
Panic (err. Error ())
}
Fmt. Printf ("There is%d pods in the cluster\n", Len (pods. Items))


Create namespace
NC: = new (v1. Namespace)
nc. Typemeta = unversioned. Typemeta{kind: "NameSpace", Apiversion: "V1"}
nc. Objectmeta = v1. objectmeta{
Name: "K8s-test",
}
nc. Spec = v1. namespacespec{}
_, Err = Clientset. Core (). Namespaces (). Create (NC)
If err! = Nil {
Log. PRINTLN (ERR)
}


Get namespace
namespaces, Err: = Clientset. Core (). Namespaces (). List (API. listoptions{})
If err! = Nil {
Panic (err. Error ())
}
Fmt. Printf ("There is%d namespaces in the cluster\n", Len (namespaces. Items))
}