1 实验
1.1 下载编译
git clone相关的project
https://github.com/kubernetes/sample-controller.git
注意，国内golang下载依赖比较慢，选择使用ali的proxy
export GOPROXY=https://mirrors.aliyun.com/goproxy/
mkdir /root/gowork
export GOPATH=/root/gowork/
cd /root/gowork/
git clone https://github.com/kubernetes/sample-controller.git
go build -v -o samplecontroller
1.2 运行controller
[vagrant@node1 sample-controller]$ ./sample-controller -kubeconfig /etc/kubernetes/admin.conf
F0806 15:48:12.736121 14843 main.go:49] Error building kubeconfig: error loading config file "/etc/kubernetes/admin.conf": open /etc/kubernetes/admin.conf: permission denied
goroutine 1 [running]:
k8s.io/klog/v2.stacks(0xc000010001, 0xc000442000, 0xb0, 0x105)
/home/mayi/workspace/duduai/gobackend/go/pkg/mod/k8s.io/klog/[email protected]/klog.go:996 +0xb8
k8s.io/klog/v2.(*loggingT).output(0x21aec20, 0xc000000003, 0x0, 0x0, 0xc0003dce00, 0x210a00a, 0x7, 0x31, 0x0)
/home/mayi/workspace/duduai/gobackend/go/pkg/mod/k8s.io/klog/[email protected]/klog.go:945 +0x19d
k8s.io/klog/v2.(*loggingT).printf(0x21aec20, 0x3, 0x0, 0x0, 0x156ab4c, 0x1d, 0xc0000c1f68, 0x1, 0x1)
/home/mayi/workspace/duduai/gobackend/go/pkg/mod/k8s.io/klog/[email protected]/klog.go:733 +0x17b
k8s.io/klog/v2.Fatalf(...)
/home/mayi/workspace/duduai/gobackend/go/pkg/mod/k8s.io/klog/[email protected]/klog.go:1456
main.main()
/home/mayi/workspace/github/sample-controller/main.go:49 +0x62f
goroutine 6 [chan receive]:
k8s.io/klog/v2.(*loggingT).flushDaemon(0x21aec20)
/home/mayi/workspace/duduai/gobackend/go/pkg/mod/k8s.io/klog/[email protected]/klog.go:1131 +0x8b
created by k8s.io/klog/v2.init.0
/home/mayi/workspace/duduai/gobackend/go/pkg/mod/k8s.io/klog/[email protected]/klog.go:416 +0xd6
goroutine 7 [syscall]:
os/signal.signal_recv(0x0)
/usr/local/go/src/runtime/sigqueue.go:147 +0x9c
os/signal.loop()
/usr/local/go/src/os/signal/signal_unix.go:23 +0x22
created by os/signal.Notify.func1
/usr/local/go/src/os/signal/signal.go:127 +0x44
goroutine 9 [runnable]:
k8s.io/sample-controller/pkg/signals.SetupSignalHandler.func1(0xc0003eb200, 0xc00008ecc0)
/home/mayi/workspace/github/sample-controller/pkg/signals/signal.go:35
created by k8s.io/sample-controller/pkg/signals.SetupSignalHandler
/home/mayi/workspace/github/sample-controller/pkg/signals/signal.go:35 +0xd0
需要修改admin.conf权限
[vagrant@node1 sample-controller]$ sudo chmod a+r /etc/kubernetes/admin.conf
运行controller
[vagrant@node1 sample-controller]$ ./sample-controller -kubeconfig /etc/kubernetes/admin.conf
I0806 15:48:46.715501 15474 controller.go:115] Setting up event handlers
I0806 15:48:46.715598 15474 controller.go:156] Starting Foo controller
I0806 15:48:46.715622 15474 controller.go:159] Waiting for informer caches to sync
I0806 15:48:46.819997 15474 controller.go:164] Starting workers
I0806 15:48:46.820046 15474 controller.go:170] Started workers
I0806 15:50:54.870759 15474 controller.go:228] Successfully synced 'default/example-foo'
I0806 15:50:54.871685 15474 event.go:291] "Event occurred" object="default/example-foo" kind="Foo" apiVersion="samplecontroller.k8s.io/v1alpha1" type="Normal" reason="Synced" message="Foo synced successfully"
I0806 15:50:54.877213 15474 controller.go:228] Successfully synced 'default/example-foo'
I0806 15:50:54.877423 15474 event.go:291] "Event occurred" object="default/example-foo" kind="Foo" apiVersion="samplecontroller.k8s.io/v1alpha1" type="Normal" reason="Synced" message="Foo synced successfully"
I0806 15:50:54.885137 15474 controller.go:228] Successfully synced 'default/example-foo'
I0806 15:50:54.885176 15474 event.go:291] "Event occurred" object="default/example-foo" kind="Foo" apiVersion="samplecontroller.k8s.io/v1alpha1" type="Normal" reason="Synced" message="Foo synced successfully"
I0806 15:50:54.934593 15474 controller.go:228] Successfully synced 'default/example-foo'
I0806 15:50:54.934717 15474 event.go:291] "Event occurred" object="default/example-foo" kind="Foo" apiVersion="samplecontroller.k8s.io/v1alpha1" type="Normal" reason="Synced" message="Foo synced successfully"
I0806 15:51:16.782318 15474 controller.go:228] Successfully synced 'default/example-foo'
I0806 15:51:16.782922 15474 event.go:291] "Event occurred" object="default/example-foo" kind="Foo" apiVersion="samplecontroller.k8s.io/v1alpha1" type="Normal" reason="Synced" message="Foo synced successfully"
I0806 15:51:46.784112 15474 controller.go:228] Successfully synced 'default/example-foo'
I0806 15:51:46.784584 15474 event.go:291] "Event occurred" object="default/example-foo" kind="Foo" apiVersion="samplecontroller.k8s.io/v1alpha1" type="Normal" reason="Synced" message="Foo synced successfully"
I0806 15:52:16.782987 15474 controller.go:228] Successfully synced 'default/example-foo'
I0806 15:52:16.783071 15474 event.go:291] "Event occurred" object="default/example-foo" kind="Foo" apiVersion="samplecontroller.k8s.io/v1alpha1" type="Normal" reason="Synced" message="Foo synced successfully"
1.3 验证运行情况
[vagrant@node1 sample-controller]$ kubectl get pod
NAME READY STATUS RESTARTS AGE
echo-goodbye-run-xcf84-echo-zpt8p-pod-sftql 0/1 Completed 0 24d
echo-goodbye-run-xcf84-goodbye-ltgp2-pod-kwl4j 0/1 Completed 0 24d
echo-run-4kb2p-pod-xswn8 0/1 Completed 0 57d
echo-run-76vs2-pod-n22jv 0/1 Completed 0 24d
echo-run-hfs8h-pod-bgkvt 0/1 Completed 0 24d
example-foo-757bd7c455-dvr7x 0/1 ContainerCreating 0 30s
goodbye-run-vcgnw-pod-k4fsn 0/1 Completed 0 24d
[vagrant@node1 sample-controller]$ kubectl get pod
NAME READY STATUS RESTARTS AGE
echo-goodbye-run-xcf84-echo-zpt8p-pod-sftql 0/1 Completed 0 24d
echo-goodbye-run-xcf84-goodbye-ltgp2-pod-kwl4j 0/1 Completed 0 24d
echo-run-4kb2p-pod-xswn8 0/1 Completed 0 57d
echo-run-76vs2-pod-n22jv 0/1 Completed 0 24d
echo-run-hfs8h-pod-bgkvt 0/1 Completed 0 24d
example-foo-757bd7c455-dvr7x 1/1 Running 0 3m23s
goodbye-run-vcgnw-pod-k4fsn 0/1 Completed 0 24d
[vagrant@node1 sample-controller]$ kubectl get deployments.apps
NAME READY UP-TO-DATE AVAILABLE AGE
example-foo 0/1 1 0 42s
jn9s-python-m8x5m-deployment 0/0 0 0 78d
jn9s-python2-c4nql-deployment 0/0 0 0 78d
jnocr-lwlcf-deployment 0/0 0 0 77d
[vagrant@node1 sample-controller]$ kubectl describe Foo example-foo
Name: example-foo
Namespace: default
Labels:
Annotations: kubectl.kubernetes.io/last-applied-configuration:
{"apiVersion":"samplecontroller.k8s.io/v1alpha1","kind":"Foo","metadata":{"annotations":{},"name":"example-foo","namespace":"default"},"sp...
API Version: samplecontroller.k8s.io/v1alpha1
Kind: Foo
Metadata:
Creation Timestamp: 2020-08-06T07:50:54Z
Generation: 2
Resource Version: 12298681
Self Link: /apis/samplecontroller.k8s.io/v1alpha1/namespaces/default/foos/example-foo
UID: e6899918-216a-4b1c-980c-2bf735276e28
Spec:
Deployment Name: example-foo
Replicas: 1
Status:
Available Replicas: 0
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Synced 2s (x10 over 2m54s) sample-controller Foo synced successfully
[vagrant@node1 sample-controller]$ kubectl get Foo
NAME AGE
example-foo 6m40s
[vagrant@node1 sample-controller]$ kubectl logs example-foo-757bd7c455-dvr7x
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Configuration complete; ready for start up