$ kubebuilder create api --group webapp --version v1 --kind Guestbook
Create Resource under pkg/apis [y/n]?
y
Create Controller under pkg/controller [y/n]?
y
Writing scaffold for you to edit...
api/v1/guestbook_types.go
controllers/guestbook_controller.go
Running make:
$ make
/Users/jimmysong/Workspace/go/bin/controller-gen object:headerFile="hack/boilerplate.go.txt" paths="./..."
go fmt ./...
go vet ./...
go: finding github.com/onsi/ginkgo v1.11.0
go: finding github.com/onsi/gomega v1.8.1
go: finding github.com/hpcloud/tail v1.0.0
go: finding gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7
go build -o bin/manager main.go
make docker-build docker-push IMG=jimmysong/kubebuilder-example:latest
make deploy IMG=jimmysong/kubebuilder-example:latest
在初始化项目时，kubebuilder 会自动根据项目名称创建一个 Namespace，如本文中的 kubebuilder-example-system，查看 Deployment 对象和 Pod 资源。
$ kubectl get deployment -n kubebuilder-example-system
NAME READY UP-TO-DATE AVAILABLE AGE
kubebuilder-example-controller-manager 1/1 1 1 3h26m
$ kubectl get pod -n kubebuilder-example-system
NAME READY STATUS RESTARTS AGE
kubebuilder-example-controller-manager-77b4c685f9-2npz8 2/2 Running 0 3h16m
/*
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package v1
import (
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
// EDIT THIS FILE! THIS IS SCAFFOLDING FOR YOU TO OWN!
// NOTE: json tags are required. Any new fields you add must have json tags for the fields to be serialized.
// GuestbookSpec defines the desired state of Guestbook
type GuestbookSpec struct {
// INSERT ADDITIONAL SPEC FIELDS - desired state of cluster
// Important: Run "make" to regenerate code after modifying this file
// Foo is an example field of Guestbook. Edit Guestbook_types.go to remove/update
// 添加两个新的字段
FirstName string `json:"firstname"`
LastName string `json:"lastname"`
}
// GuestbookStatus defines the observed state of Guestbook
type GuestbookStatus struct {
// INSERT ADDITIONAL STATUS FIELD - define observed state of cluster
// Important: Run "make" to regenerate code after modifying this file
Status string `json:"Status"`
}
// +kubebuilder:object:root=true
// 在这里增加 status 的说明
// +kubebuilder:subresource:status
// Guestbook is the Schema for the guestbooks API
type Guestbook struct {
metav1.TypeMeta `json:",inline"`
metav1.ObjectMeta `json:"metadata,omitempty"`
Spec GuestbookSpec `json:"spec,omitempty"`
Status GuestbookStatus `json:"status,omitempty"`
}
// +kubebuilder:object:root=true
// GuestbookList contains a list of Guestbook
type GuestbookList struct {
metav1.TypeMeta `json:",inline"`
metav1.ListMeta `json:"metadata,omitempty"`
Items []Guestbook `json:"items"`
}
func init() {
SchemeBuilder.Register(&Guestbook{}, &GuestbookList{})
}
go fmt ./...
go vet ./...
/Users/jimmysong/Workspace/go/bin/controller-gen "crd:trivialVersions=true" rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases
go run ./main.go
2020-06-07T16:48:29.966+0800 INFO controller-runtime.metrics metrics server is starting to listen {"addr": ":8080"}
2020-06-07T16:48:29.967+0800 INFO setup starting manager
2020-06-07T16:48:29.967+0800 INFO controller-runtime.manager starting metrics server {"path": "/metrics"}
2020-06-07T16:48:29.967+0800 INFO controller-runtime.controller Starting EventSource {"controller": "guestbook", "source": "kind source: /, Kind="}
2020-06-07T16:48:30.068+0800 INFO controller-runtime.controller Starting Controller {"controller": "guestbook"}
2020-06-07T16:48:30.068+0800 INFO controller-runtime.controller Starting workers {"controller": "guestbook", "worker count": 1}
2020/06/07 16:48:30 Geeting from Kubebuilder to Jimmy Song
2020-06-07T16:48:30.080+0800 DEBUG controller-runtime.controller Successfully Reconciled {"controller": "guestbook", "request": "kubebuilder-example-system/guestbook-sample"}
从上面的日志中，可以看到这条输出。
2020/06/07 16:48:30 Geeting from Kubebuilder to Jimmy Song
这正是在 Reconcile 函数中的输出。
获取当前的 CR
使用下面的命令获取当前的 CR。
# kubectl get guestbooks.webapp.jimmysong.io guestbook-sample -o yaml
2020/06/07 20:09:50 Guestbook.webapp.jimmysong.io "guestbook-sample" not found Unable to fetch object
2020/06/07 20:09:50 resource name may not be empty unable to update status
2020-06-07T20:09:50.380+0800 DEBUG controller-runtime.controller Successfully Reconciled {"controller": "guestbook", "request": "kubebuilder-example-system/guestbook-sample"}
