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$ docker run -ti ¥
ubuntu bash
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$ cat serve.go
time.Sleep(5 * time.Second)
http.HandleFunc("/",
func(w http.ResponseWriter,
r *http.Request) {
log.Printf("%s %s %s %s",
r.Method, r.URL.String(),
r.RemoteAddr, r.UserAgent())
w.Write([]byte(*greeting + "¥n"))
})
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$ cat Dockerfile
FROM golang:1.12-alpine
RUN go build serve.go
CMD ["./serve", "--listen=:80",
"--greeting=Hello, Docker!"]
$ docker build --tag $TAG .
Successfully built 728b5f3086be
Successfully tagged docker-
registry.linecorp.com/christopher-
pickel/hello-world:latest
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$ docker run -rm --name=demo ¥
--publish 127.0.0.1:2080:80/tcp ¥
$TAG
2019/07/25 06:34:41 starting
2019/07/25 06:34:46 listening on :80
2019/07/25 06:34:52 GET /
172.17.0.1:41676 curl/7.54.0
$ curl localhost:2080
Hello, Docker!
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$ docker exec -ti demo bash
bash-4.4# ps
PID USER TIME COMMAND
1 root 0:00 ./serve --listen=…
12 root 0:00 bash
22 root 0:00 ps
bash-4.4# curl localhost
Hello, Docker!
2019/07/25 06:36:27 GET / 127.0.0.1:36774
curl/7.64.0
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bash-4.4# file ./serve
serve: ELF 64-bit LSB executable, x86-64…
bash-4.4# uname
Linux
bash-4.4# exit
$ uname
Darwin
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$ cat kube.yaml
containers:
- name: hello
image: docker-registry.linecorp.com/ch…
args: ["./serve", "--listen=:80",
"--greeting=Hello, Kubernetes!"]
readinessProbe:
httpGet:
path: /healthz
port: 80
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$ kubectl apply -f kube.yaml
namespace/demo created
deployment.apps/hello created
service/hello created
$ curl $(minikube ip):$PORT
Hello, Kubernetes! namespace/demo created
deployment.apps/hello created
service/hello created
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$ kubectl logs hello-674f6956d-97kcb
2019/07/23 09:11:34 starting
2019/07/23 09:11:39 listening on :80
2019/07/23 09:11:44 GET /healthz
172.17.0.1:39214 kube-probe/1.15
2019/07/23 09:11:49 GET /healthz
172.17.0.1:39214 kube-probe/1.15
2019/07/23 09:11:51 GET /
172.17.0.1:63338 curl/7.54.0
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$ kubectl edit deployment hello
(s/replicas: 1/replicas: 10/)
$ kubectl edit deployment hello
(s/Hello, Kubernetes/Hello, Rollouts/)
$ kubectl rollout status deployment hello
Waiting for deployment "hello" rollout to
finish: 9 of 10 updated replicas are
available...
deployment "hello" successfully rolled
out
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