All the files are about a simple example to test tekton.
sa.yaml: the service account file to store the sa info which is associated with secrets, such as github/gitlab credentials, dockerhub credentials;secret-credentials.yaml: to store the detail credentials info about github/gitlab/dockerhub login;pipelineresource.yaml: specify the input and output for the CI/CD Pipeline, namely the input source and output image info;task.yaml: detail info about tekton task;taskrun.yaml: detail info about taskrun;
Then using kubectl apply command to create all the resouces, the demo will be OK.
Checking the taskrun resource
$ tkn -n tekton-demo tr list
NAME STARTED DURATION STATUS
build-docker-image-run 6 days ago 1 minute Succeeded
Checking the task resource
$ tkn -n tekton-demo task list
NAME DESCRIPTION AGE
build-docker-image 6 days ago
The below info shows the tekton demo(build docker image and push image to the registry success).