将crd部署到k8s

make install

日志：

kustomize build config/crd | kubectl apply -f - customresourcedefinition.apiextensions.k8s.io/demoes.tutorial.demo.com created

查看下

[root@paas-m-k8s-master-1 demo-operator]# kubectl api-resources | grep demo
demoes tutorial.demo.com true Demo

确实有了，不错哦。

编译运行controller

make run

保持窗口开启

。。。日志如下
go run ./main.go
I0314 14:37:11.802311 20314 request.go:665] Waited for 1.037997549s due to client-side throttling, not priority and fairness, request: GET:https://apiserver.cluster.local:6443/apis/rbac.istio.io/v1alpha1?timeout=32s
2024-03-14T14:37:13.055+0800 INFO controller-runtime.metrics metrics server is starting to listen {"addr": ":8080"}
2024-03-14T14:37:13.055+0800 INFO setup starting manager
2024-03-14T14:37:13.055+0800 INFO starting metrics server {"path": "/metrics"}
2024-03-14T14:37:13.055+0800 INFO controller.demo Starting EventSource {"reconciler group": "tutorial.demo.com", "reconciler kind": "Demo", "source": "kind source: /, Kind="}
2024-03-14T14:37:13.055+0800 INFO controller.demo Starting Controller {"reconciler group": "tutorial.demo.com", "reconciler kind": "Demo"}
2024-03-14T14:37:13.258+0800 INFO controller.demo Starting workers {"reconciler group": "tutorial.demo.com", "reconciler kind": "Demo", "worker count": 1}

创建一个crd实例

在samples目录下有一个默认的资源描述文件tutorial_v1_demo.yaml

我们可以使用进行部署测试

apiVersion: tutorial.demo.com/v1
kind: Demo
metadata:
namespace: demo
name: demo-sample
spec:
# TODO(user): Add fields here
image: nginx:1.22
svcName: demo-ng
replicas: 3

现在还没有我们自定义的demo crd实例，demo nameSpace下也没有任何pod

# kubectl -n demo get demo
No resources found in default namespace.
# kubectl -n demo get pod
No resources found in demo namespace.

我们apply一下这个demo crd

# kubectl apply -f config/samples/tutorial_v1_demo.yaml

查看自定义资源

# kubectl get demo -n demo
NAME AGE
demo-sample 12s

controller的日志

查看资源

# kubectl -n demo get pod
NAME READY STATUS RESTARTS AGE
demo-ng-6df8f7c68f-4mg9n 1/1 Running 0 4m33s
demo-ng-6df8f7c68f-699bv 1/1 Running 0 4m33s
demo-ng-6df8f7c68f-n6zkc 1/1 Running 0 4m33s

看到3个pod都创建出来了

验证通过patch修改podNum，来增减pod的数量

kubectl -n demo patch demo demo-sample --type merge --patch '{"spec": {"replicas": 5}}'

自动加到了5个

减一下

kubectl -n demo patch demo demo-sample --type merge --patch '{"spec": {"replicas": 2}}'

controller中也会看到对应的日志