[go dockerfile] dockerfile templates #docker

.dockerfile

FROM golang:1.16 as builder

WORKDIR /go/src

COPY go.mod .
COPY go.sum .

RUN go mod download
# build delve
RUN go get github.com/go-delve/delve/cmd/dlv

COPY . .
# build prod app
RUN GOARCH=amd64 GOOS=linux CGO_ENABLED=0 go build -ldflags="-s -w -X 'main.EnvPrefix=GO'" -o app ./cmd
# build debug app
RUN GOARCH=amd64 GOOS=linux CGO_ENABLED=0 go build -gcflags "all=-N -l" -ldflags="-X 'main.EnvPrefix=GO'" -o debug ./cmd

FROM alpine:3.8

RUN apk add --no-cache libc6-compat

WORKDIR /usr/bin/go

COPY --from=builder ["/go/src/config.yaml", "/go/src/jwt-pub.pem", "/go/src/app", "/go/src/debug", "/go/bin/dlv", "./"]

RUN chmod 0755 app
RUN chmod 0755 debug

EXPOSE 8081 2345

CMD [ "./app" ]

.dockerignore

**/.classpath
**/.dockerignore
**/.env
**/.git
**/.gitignore
**/.project
**/.settings
**/.toolstarget
**/.vs
**/.vscode
**/Dockerfile*
*.toml
*.js

.vscode
.editorconfig
app
tmp
db

k8s.yaml

ports:
  - containerPort: 8081
  - containerPort: 2345
command:
  [
    './dlv',
    '--listen=:2345',
    '--headless=true',
    '--log',
    '--api-version=2',
    '--accept-multiclient',
    'exec',
    './debug',
  ]

launch.json

{
  "name": "Connect to server",
  "type": "go",
  "request": "attach",
  "mode": "remote",
  "remotePath": "",
  "port": 2345,
  "host": "127.0.0.1",
  "cwd": "${workspaceFolder}"
},