目录：（可以按w快捷键切换大纲视图）
本篇是关于Tekton的 Getting Started，也就是最简单的demo - helloworld
install
用minikube或者kind搭建Kubernetes环境后。一条kubectl apply命令完成Tekton的安装。
[developer@localhost kubevirt-tekton-tasks]$ kubectl apply -f https://storage.googleapis.com/tekton-releases/pipeline/latest/release.yaml
namespace/tekton-pipelines created
Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+
podsecuritypolicy.policy/tekton-pipelines created
clusterrole.rbac.authorization.k8s.io/tekton-pipelines-controller-cluster-access created
clusterrole.rbac.authorization.k8s.io/tekton-pipelines-controller-tenant-access created
clusterrole.rbac.authorization.k8s.io/tekton-pipelines-webhook-cluster-access created
role.rbac.authorization.k8s.io/tekton-pipelines-controller created
role.rbac.authorization.k8s.io/tekton-pipelines-webhook created
role.rbac.authorization.k8s.io/tekton-pipelines-leader-election created
role.rbac.authorization.k8s.io/tekton-pipelines-info created
serviceaccount/tekton-pipelines-controller created
serviceaccount/tekton-pipelines-webhook created
clusterrolebinding.rbac.authorization.k8s.io/tekton-pipelines-controller-cluster-access created
clusterrolebinding.rbac.authorization.k8s.io/tekton-pipelines-controller-tenant-access created
clusterrolebinding.rbac.authorization.k8s.io/tekton-pipelines-webhook-cluster-access created
rolebinding.rbac.authorization.k8s.io/tekton-pipelines-controller created
rolebinding.rbac.authorization.k8s.io/tekton-pipelines-webhook created
rolebinding.rbac.authorization.k8s.io/tekton-pipelines-controller-leaderelection created
rolebinding.rbac.authorization.k8s.io/tekton-pipelines-webhook-leaderelection created
rolebinding.rbac.authorization.k8s.io/tekton-pipelines-info created
customresourcedefinition.apiextensions.k8s.io/clustertasks.tekton.dev created
customresourcedefinition.apiextensions.k8s.io/conditions.tekton.dev created
customresourcedefinition.apiextensions.k8s.io/pipelines.tekton.dev created
customresourcedefinition.apiextensions.k8s.io/pipelineruns.tekton.dev created
customresourcedefinition.apiextensions.k8s.io/resolutionrequests.resolution.tekton.dev created
customresourcedefinition.apiextensions.k8s.io/pipelineresources.tekton.dev created
customresourcedefinition.apiextensions.k8s.io/runs.tekton.dev created
customresourcedefinition.apiextensions.k8s.io/tasks.tekton.dev created
customresourcedefinition.apiextensions.k8s.io/taskruns.tekton.dev created
secret/webhook-certs created
validatingwebhookconfiguration.admissionregistration.k8s.io/validation.webhook.pipeline.tekton.dev created
mutatingwebhookconfiguration.admissionregistration.k8s.io/webhook.pipeline.tekton.dev created
validatingwebhookconfiguration.admissionregistration.k8s.io/config.webhook.pipeline.tekton.dev created
clusterrole.rbac.authorization.k8s.io/tekton-aggregate-edit created
clusterrole.rbac.authorization.k8s.io/tekton-aggregate-view created
configmap/config-artifact-bucket created
configmap/config-artifact-pvc created
configmap/config-defaults created
configmap/feature-flags created
configmap/pipelines-info created
configmap/config-leader-election created
configmap/config-logging created
configmap/config-observability created
configmap/config-registry-cert created
deployment.apps/tekton-pipelines-controller created
service/tekton-pipelines-controller created
Warning: autoscaling/v2beta1 HorizontalPodAutoscaler is deprecated in v1.22+, unavailable in v1.25+; use autoscaling/v2 HorizontalPodAutoscaler
horizontalpodautoscaler.autoscaling/tekton-pipelines-webhook created
deployment.apps/tekton-pipelines-webhook created
service/tekton-pipelines-webhook created
#首次安装，等待拉取镜像
[developer@localhost ~]$ kubectl get pods -n tekton-pipelines
NAME READY STATUS RESTARTS AGE
tekton-pipelines-controller-795d77dbd6-x2dkt 1/1 Running 0 11m
tekton-pipelines-webhook-579c8dc94c-82cbn 1/1 Running 0 3m52stask
[developer@localhost ~]$ cat hello-world.yaml
apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
name: hello
spec:
steps:
- name: echo
image: alpine
script: |
#!/bin/sh
echo "Hello World"
[developer@localhost ~]$ kubectl apply -f hello-world.yaml
task.tekton.dev/hello created
[developer@localhost tekton-hello]$ cat hello-world-run.yaml
apiVersion: tekton.dev/v1beta1
kind: TaskRun
metadata:
name: hello-task-run
spec:
taskRef:
name: hello
[developer@localhost tekton-hello]$ kubectl apply --filename hello-world-run.yaml
taskrun.tekton.dev/hello-task-run created
[developer@localhost tekton-hello]$ kubectl get taskrun hello-task-run
NAME SUCCEEDED REASON STARTTIME COMPLETIONTIME
hello-task-run Unknown Pending 22s
[developer@localhost tekton-hello]$ kubectl logs --selector=tekton.dev/taskRun=hello-task-run
Error from server (BadRequest): container "step-echo" in pod "hello-task-run-pod" is waiting to start: PodInitializing
[developer@localhost tekton-hello]$ kubectl get pod
NAME READY STATUS RESTARTS AGE
hello-task-run-pod 0/1 Init:0/3 0 41s
#等待 gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/entrypoint:v0.35.1 镜像拉取完成
vents:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 8h default-scheduler Successfully assigned default/hello-task-run-pod to minikube
Warning Failed 8h kubelet Failed to pull image "gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/entrypoint:v0.35.1@sha256:4fc8631a27bdd1b4c149a08b7db0465a706559ccddd979d0b9dbc93ef676105d": rpc error: code = Unknown desc = error pulling image configuration: Get "https://gcr.io/v2/tekton-releases/github.com/tektoncd/pipeline/cmd/entrypoint/blobs/sha256:17e1278505574391f7a58602fabadd837aded266a298a2a58f3d7e646a84491e": net/http: TLS handshake timeout
Normal Pulling 8h (x4 over 8h) kubelet Pulling image "gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/entrypoint:v0.35.1@sha256:4fc8631a27bdd1b4c149a08b7db0465a706559ccddd979d0b9dbc93ef676105d"
Warning Failed 8h (x3 over 8h) kubelet Failed to pull image "gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/entrypoint:v0.35.1@sha256:4fc8631a27bdd1b4c149a08b7db0465a706559ccddd979d0b9dbc93ef676105d": rpc error: code = Unknown desc = context canceled
Warning Failed 8h (x4 over 8h) kubelet Error: ErrImagePull
Warning Failed 8h (x7 over 8h) kubelet Error: ImagePullBackOff
Normal BackOff 8h (x8 over 8h) kubelet Back-off pulling image "gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/entrypoint:v0.35.1@sha256:4fc8631a27bdd1b4c149a08b7db0465a706559ccddd979d0b9dbc93ef676105d"
# 镜像太大了，竟然下载失败了，可能网络不稳定导致超时，可以手动拉取镜像
[developer@localhost tekton-hello]$ minikube ssh
_ _
_ _ ( ) ( )
___ ___ (_) ___ (_)| |/') _ _ | |_ __
/' _ ` _ `\| |/' _ `\| || , < ( ) ( )| '_`\ /'__`\
| ( ) ( ) || || ( ) || || |\`\ | (_) || |_) )( ___/
(_) (_) (_)(_)(_) (_)(_)(_) (_)`\___/'(_,__/'`\____)
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
k8s.gcr.io/kube-apiserver v1.23.3 f40be0088a83 4 months ago 135MB
k8s.gcr.io/kube-controller-manager v1.23.3 b07520cd7ab7 4 months ago 125MB
k8s.gcr.io/kube-scheduler v1.23.3 99a3486be4f2 4 months ago 53.5MB
k8s.gcr.io/kube-proxy v1.23.3 9b7cc9982109 4 months ago 112MB
k8s.gcr.io/etcd 3.5.1-0 25f8c7f3da61 7 months ago 293MB
k8s.gcr.io/coredns/coredns v1.8.6 a4ca41631cc7 7 months ago 46.8MB
k8s.gcr.io/pause 3.6 6270bb605e12 9 months ago 683kB
kubernetesui/dashboard v2.3.1 e1482a24335a 11 months ago 220MB
kubernetesui/metrics-scraper v1.0.7 7801cfc6d5c0 11 months ago 34.4MB
gcr.io/k8s-minikube/storage-provisioner v5 6e38f40d628d 14 months ago 31.5MB
registry <none> 678dfa38fcfa 17 months ago 26.2MB
gcr.io/google_containers/kube-registry-proxy <none> 60dc18151daf 5 years ago 188MB
gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/webhook <none> fc324a2913a5 52 years ago 76.8MB
gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/entrypoint <none> 17e127850557 52 years ago 64.7MB
gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/controller <none> 721d8b7d2eaf 52 years ago 86.1MB
$ docker pull gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/entrypoint:v0.35.1@sha256:4fc8631a27bdd1b4c149a08b7db0465a706559ccddd979d0b9dbc93ef676105d
gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/entrypoint@sha256:4fc8631a27bdd1b4c149a08b7db0465a706559ccddd979d0b9dbc93ef676105d: Pulling from tekton-releases/github.com/tektoncd/pipeline/cmd/entrypoint
Digest: sha256:4fc8631a27bdd1b4c149a08b7db0465a706559ccddd979d0b9dbc93ef676105d
Status: Image is up to date for gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/entrypoint@sha256:4fc8631a27bdd1b4c149a08b7db0465a706559ccddd979d0b9dbc93ef676105d
gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/entrypoint:v0.35.1@sha256:4fc8631a27bdd1b4c149a08b7db0465a706559ccddd979d0b9dbc93ef676105d
# 发现镜像成功拉取了，应该仅仅是下载时间太长了，超时了，过了一会，pod：hello-task-run-pod 执行完成。状态为Completed
[developer@localhost tekton-hello]$ kubectl get pod
NAME READY STATUS RESTARTS AGE
hello-task-run-pod 0/1 Completed 0 22m
[developer@localhost tekton-hello]$ kubectl logs --selector=tekton.dev/taskRun=hello-task-run
Hello Worldpipeline
[developer@localhost tekton-hello]$ cat goodbye-world.yaml
apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
name: goodbye
spec:
steps:
- name: goodbye
image: ubuntu
script: |
#!/bin/bash
echo "Goodbye World!"
[developer@localhost tekton-hello]$ kubectl apply -f goodbye-world.yaml
task.tekton.dev/goodbye created
[developer@localhost tekton-hello]$ cat hello-goodbye-pipeline.yaml
apiVersion: tekton.dev/v1beta1
kind: Pipeline
metadata:
name: hello-goodbye
spec:
tasks:
- name: hello
taskRef:
name: hello
- name: goodbye
runAfter:
- hello
taskRef:
name: goodbye
[developer@localhost tekton-hello]$ kubectl apply --filename hello-goodbye-pipeline.yaml
pipeline.tekton.dev/hello-goodbye configured
[developer@localhost tekton-hello]$ kubectl get task
NAME AGE
goodbye 25m
hello 49m
[developer@localhost tekton-hello]$ kubectl get task -A
NAMESPACE NAME AGE
default goodbye 25m
default hello 49m
[developer@localhost tekton-hello]$ cat hello-goodbye-pipeline-run.yaml
apiVersion: tekton.dev/v1beta1
kind: PipelineRun
metadata:
name: hello-goodbye-run
spec:
pipelineRef:
name: hello-goodbye
[developer@localhost tekton-hello]$ kubectl apply --filename hello-goodbye-pipeline-run.yaml
pipelinerun.tekton.dev/hello-goodbye-run created
[developer@localhost tekton-hello]$ tkn
-bash: tkn: command not found
[developer@localhost tekton-hello]$ rpm -ivh https://github.com/tektoncd/cli/releases/download/v0.23.1/tektoncd-cli-0.23.1_Linux-64bit.rpm
Retrieving https://github.com/tektoncd/cli/releases/download/v0.23.1/tektoncd-cli-0.23.1_Linux-64bit.rpm
error: can't create transaction lock on /var/lib/rpm/.rpm.lock (Permission denied)
[developer@localhost tekton-hello]$ sudo rpm -ivh https://github.com/tektoncd/cli/releases/download/v0.23.1/tektoncd-cli-0.23.1_Linux-64bit.rpm
Retrieving https://github.com/tektoncd/cli/releases/download/v0.23.1/tektoncd-cli-0.23.1_Linux-64bit.rpm
Preparing... ################################# [100%]
Updating / installing...
1:cli-0:0.23.1-1 ################################# [100%]
[developer@localhost tekton-hello]$ tkn pipelinerun logs hello-goodbye-run -f -n default
[hello : echo] Hello World
[goodbye : goodbye] Goodbye World!
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