GCP Quickstart: Build and Deploy (Cloud Run Tutorial) - google-cloud-platform

Question

From the link below:
https://cloud.google.com/run/docs/quickstarts/build-and-deploy#shell_1;
I am going through a tutorial on how to deploy an app on Cloud Run, and I keep having errors. see details below:
Quickstart: Build and Deploy
Directory: helloworld-shell
Files in Directory:
script.sh
invoke.go
Dockerfile
Code of each file
Script Code
script.sh
#!/bin/sh
echo Hello ${TARGET:=World}!
Invoke Code:
invoke.go
package main
import (
"fmt"
"log"
"net/http"
"os"
"os/exec"
)
func handler(w http.ResponseWriter, r *http.Request) {
log.Print("helloworld: received a request")
cmd := exec.CommandContext(r.Context(), "/bin/sh", "script.sh")
cmd.Stderr = os.Stderr
out, err := cmd.Output()
if err != nil {
w.WriteHeader(500)
}
w.Write(out)
}
func main() {
log.Print("helloworld: starting server...")
http.HandleFunc("/", handler)
port := os.Getenv("PORT")
if port == "" {
port = "8080"
}
log.Printf("helloworld: listening on %s", port)
log.Fatal(http.ListenAndServe(fmt.Sprintf(":%s", port), nil))
}
Dockerfile
# Use the official Golang image to create a build artifact.
# This is based on Debian and sets the GOPATH to /go.
# https://hub.docker.com/_/golang
FROM golang:1.13 as builder
# Create and change to the app directory.
WORKDIR /app
# Retrieve application dependencies using go modules.
# Allows container builds to reuse downloaded dependencies.
COPY go.* ./
RUN go mod download
# Copy local code to the container image.
COPY invoke.go ./
# Build the binary.
# -mod=readonly ensures immutable go.mod and go.sum in container builds.
RUN CGO_ENABLED=0 GOOS=linux go build -mod=readonly -v -o server
# Use the official Alpine image for a lean production container.
# https://hub.docker.com/_/alpine
# https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds
FROM alpine:3
RUN apk add --no-cache ca-certificates
# Copy the binary to the production image from the builder stage.
COPY --from=builder /app/server /server
COPY script.sh ./
# Run the web service on container startup.
CMD ["/server"]
After running the build cmd on the cloud shell, as below:
gcloud builds submit --tag gcr.io/ultra-complex-282611/helloworld
I keep getting output as below:
sunny#cloudshell:~/helloworld-shell (ultra-complex-282611)$ gcloud builds submit --tag gcr.io/ultra-complex-282611/helloworld-shell/script.sh
Creating temporary tarball archive of 3 file(s) totalling 1.8 KiB before compression.
Uploading tarball of [.] to [gs://ultra-complex-282611_cloudbuild/source/1595280001.548751-6f55216d642d438a82392a7ae1688fbe.tgz]
Created [https://cloudbuild.googleapis.com/v1/projects/ultra-complex-282611/builds/ec154f13-cc1e-4082-bcc0-e47804d201cb].
Logs are available at [https://console.cloud.google.com/cloud-build/builds/ec154f13-cc1e-4082-bcc0-e47804d201cb?project=413771885505].
---------------------------------------------------------------------------- REMOTE BUILD OUTPUT ----------------------------------------------------------------------------
starting build "ec154f13-cc1e-4082-bcc0-e47804d201cb"
FETCHSOURCE
Fetching storage object: gs://ultra-complex-282611_cloudbuild/source/1595280001.548751-6f55216d642d438a82392a7ae1688fbe.tgz#1595280009304068
Copying gs://ultra-complex-282611_cloudbuild/source/1595280001.548751-6f55216d642d438a82392a7ae1688fbe.tgz#1595280009304068...
/ [1 files][ 1.1 KiB/ 1.1 KiB]
Operation completed over 1 objects/1.1 KiB.
BUILD
Already have image (with digest): gcr.io/cloud-builders/docker
***** NOTICE *****
Alternative official `docker` images, including multiple versions across
multiple platforms, are maintained by the Docker Team. For details, please
visit https://hub.docker.com/_/docker.
***** END OF NOTICE *****
Sending build context to Docker daemon 5.632kB
Step 1/11 : FROM golang:1.13 as builder
1.13: Pulling from library/golang
e9afc4f90ab0: Already exists
989e6b19a265: Already exists
af14b6c2f878: Already exists
5573c4b30949: Already exists
d4020e2aa747: Already exists
78b4a3dfc225: Pulling fs layer
2ade102f7410: Pulling fs layer
2ade102f7410: Verifying Checksum
2ade102f7410: Download complete
78b4a3dfc225: Verifying Checksum
2ade102f7410: Download complete
78b4a3dfc225: Verifying Checksum
78b4a3dfc225: Download complete
78b4a3dfc225: Pull complete
2ade102f7410: Pull complete
Digest: sha256:ffb07735793859dc30a06503eb4cbc5c9523b1477ac55155c61a2285abd4c89d
Status: Downloaded newer image for golang:1.13
---> afae231e0b45
Step 2/11 : WORKDIR /app
---> Running in 5f7bae1883f6
Removing intermediate container 5f7bae1883f6
---> 3405fccd5cd0
Step 3/11 : COPY go.* ./
COPY failed: no source files were specified
ERROR
ERROR: build step 0 "gcr.io/cloud-builders/docker" failed: step exited with non-zero status: 1
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
ERROR: (gcloud.builds.submit) build ec154f13-cc1e-4082-bcc0-e47804d201cb completed with status "FAILURE"
How else am I supposed to specify the source file?

Answer 1

I had the same issue. I solved it by creating the go.mod file in the directory helloworld-shell shown in the go tab of the documentation, this allowed for the build to succeed.
module github.com/knative/docs/docs/serving/samples/hello-world/helloworld-go
go 1.13
You should have the following files:
Dockerfile go.mod invoke.go script.sh