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McSwitchMcSwitch
committedAug 14, 2021
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v0.1
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‎.github/workflows/build.yml

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name: Build
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on:
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pull_request:
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branches: ['main']
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jobs:
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build:
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name: Build
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-go@v2
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with:
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go-version: 1.16.x
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- run: |
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go generate -v .
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CGO_ENABLED=0 GOOS=linux go build ./...

‎.github/workflows/release.yml

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name: Release
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on:
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push:
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tags:
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- '*'
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env:
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REGISTRY: ghcr.io
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IMAGE_NAME: ${{ github.repository }}
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jobs:
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goreleaser:
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name: Release
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runs-on: ubuntu-latest
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permissions:
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contents: read
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packages: write
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-go@v2
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with:
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go-version: 1.16.x
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- run: |
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go generate -v .
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CGO_ENABLED=0 GOOS=linux go build -o build
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go test -run=^$ ./...
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- name: Log in to the Container registry
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uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
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with:
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registry: ${{ env.REGISTRY }}
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username: ${{ github.actor }}
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password: ${{ secrets.GITHUB_TOKEN }}
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- name: Extract metadata (tags, labels) for Docker
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id: meta
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uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
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with:
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images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
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- name: Build and push Docker image
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uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
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with:
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context: .
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push: true
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tags: ${{ steps.meta.outputs.tags }}
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labels: ${{ steps.meta.outputs.labels }}

‎.github/workflows/test.yml

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name: Test
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on:
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push:
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branches: ['main']
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pull_request:
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branches: ['main']
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jobs:
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test:
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name: Unit Tests
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-go@v2
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with:
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go-version: 1.16.x
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- run: |
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go generate -v .
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go test -coverprofile=coverage.txt -covermode=atomic -race ./...
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- uses: codecov/codecov-action@v1

‎.gitignore

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.idea
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cmd/base.meta.go
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service/base.meta.go
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build

‎Dockerfile

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FROM scratch
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ADD build /
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ENTRYPOINT ["/build"]
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CMD ["run"]

‎LICENSE

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MIT License
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Copyright (c) 2021 Uniform
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.

‎README.md

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# base-service
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A templated starting point for uniform microservices
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### Getting Started
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First step is to compile resources and metadata into the project's source-code:
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```
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go generate
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```
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This will create a file `service/meta.go` which is ignored by the `.gitignore` and contains the project's resources and metadata.
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Create `.description` file to override the description as pulled from Github.
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### CLI Commands
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cmd command example `cmd/command.example-one.go`:
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```
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package cmd
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import (
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"github.com/spf13/cobra"
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"service/service"
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)
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var exampleOneCmd = &cobra.Command{
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Use: "command:example-one",
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Short: "Request the running " + service.AppName + " to execute the example-one command",
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Long: "Request the running " + service.AppName + " to execute the example-one command",
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Run: func(cmd *cobra.Command, args []string) {
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service.Command("example-one", natsUri, compileNatsOptions())
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},
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}
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func init() {
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rootCmd.AddCommand(exampleOneCmd)
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}
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```
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service command example `service/command.example-one.go`:
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```
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package service
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import (
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"github.com/go-diary/diary"
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"github.com/go-uniform/uniform"
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)
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func init() {
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subscribe(local(command("example-one")), exampleOne)
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}
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func exampleOne(r uniform.IRequest, p diary.IPage) {
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// todo: write logic here
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}
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```
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### Background Worker Process
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Use a CLI Command and add it to a scheduled cronjob to avoid the background process from being executed multiple times when scaling service instances.
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In other words this will work like a sync.Mutex but across all running instances of the given service, allowing us to add as many service instances as we need.
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### Routines
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service action example `service/routine.example-two.go`:
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```
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package service
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import (
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"github.com/go-diary/diary"
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"github.com/go-uniform/uniform"
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)
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func init() {
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subscribe(local("example-two"), exampleTwo)
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}
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func exampleTwo(r uniform.IRequest, p diary.IPage) {
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// todo: write logic here
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}
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```
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### Events
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service event example `service/event.example-three.go`:
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```
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package service
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import (
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"github.com/go-diary/diary"
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"github.com/go-uniform/uniform"
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)
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func init() {
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subscribe(local("example-three"), exampleThree)
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}
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func exampleThree(r uniform.IRequest, p diary.IPage) {
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// todo: write logic here
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}
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```

‎cmd/base.command.go

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package cmd
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import (
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"fmt"
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"github.com/spf13/cobra"
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"service/service"
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)
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func Command(name string, handler func(cmd *cobra.Command, args []string)) *cobra.Command {
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return &cobra.Command{
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Use: fmt.Sprintf("command:%s", name),
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Short: fmt.Sprintf("Request the running %s to execute the %s command", service.AppName, name),
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Long: fmt.Sprintf("Request the running %s to execute the %s command", service.AppName, name),
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Run: handler,
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}
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}

‎cmd/base.execute.go

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package cmd
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import (
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"crypto/tls"
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"fmt"
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"github.com/nats-io/go-nats"
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"github.com/spf13/cobra"
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"os"
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"service/service"
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)
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var natsUri string
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var natsCert string
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var natsKey string
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var level string
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var rate int
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var limit int
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var test bool
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var disableTls bool
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var rootCmd = &cobra.Command{
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Use: service.AppName,
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Short: service.AppDescription,
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Long: service.AppDescription,
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Run: func(cmd *cobra.Command, args []string) {
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if err := cmd.Help(); err != nil {
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panic(err)
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}
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},
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}
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func init() {
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rootCmd.PersistentFlags().StringVarP(&natsUri, "nats", "n", nats.DefaultURL, "The nats cluster URI")
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rootCmd.PersistentFlags().StringVarP(&natsCert, "nats-cert", "", "/etc/ssl/certs/ssl-bundle.crt", "The nats cluster TLS certificate file path")
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rootCmd.PersistentFlags().StringVarP(&natsKey, "nats-key", "", "/etc/ssl/private/ssl.key", "The nats cluster TLS key file path")
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rootCmd.PersistentFlags().BoolVar(&disableTls, "disable-tls", false, "A flag indicating if service should disable tls encryption")
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}
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func compileNatsOptions() []nats.Option {
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var natsOptions = make([]nats.Option, 0)
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if !disableTls {
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cert, err := tls.LoadX509KeyPair(natsCert, natsKey)
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if err != nil {
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panic(err)
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}
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config := &tls.Config{
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// since NATS backbone for Fluid will always be on a private line we must skip host verification step
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InsecureSkipVerify: true,
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Certificates: []tls.Certificate{cert},
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MinVersion: tls.VersionTLS12,
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}
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natsOptions = append(natsOptions, nats.Secure(config))
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}
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return natsOptions
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}
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func Execute() {
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if err := rootCmd.Execute(); err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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}

‎cmd/base.version.go

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package cmd
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import (
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"fmt"
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"github.com/spf13/cobra"
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"service/service"
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)
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var versionCmd = &cobra.Command{
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Use: "version",
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Short: "Show " + service.AppName + " version information",
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Long: "Show " + service.AppName + " version information",
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Run: func(cmd *cobra.Command, args []string) {
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fmt.Printf("%s version %s, build %s\n", service.AppName, service.AppVersion, service.AppCommit)
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},
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}
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func init() {
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rootCmd.AddCommand(versionCmd)
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}

‎cmd/command.ping.go

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package cmd
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import (
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"github.com/spf13/cobra"
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"service/service"
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)
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func init() {
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rootCmd.AddCommand(Command("ping", func(cmd *cobra.Command, args []string) {
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service.InitializeDiary(test, level, rate)
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service.Command("ping", natsUri, compileNatsOptions(), map[string]string{})
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}))
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}

‎cmd/run.go

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package cmd
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import (
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"github.com/spf13/cobra"
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"service/service"
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)
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var runCmd = &cobra.Command{
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Use: "run",
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Short: "Run " + service.AppName + " service",
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Long: "Run " + service.AppName + " service",
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Run: func(cmd *cobra.Command, args []string) {
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service.InitializeDiary(test, level, rate)
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service.Execute(limit, test, natsUri, compileNatsOptions(), service.M{
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// todo: add custom args here
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})
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},
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}
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func init() {
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runCmd.Flags().StringVarP(&level, "lvl", "l", "trace", "The logging level ['trace', 'debug', 'info', 'notice', 'warning', 'error', 'fatal'] that service is running in")
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runCmd.Flags().IntVarP(&rate, "rate", "r", 1000, "The sample rate of the trace logs used for performance auditing [set to -1 to log every trace]")
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runCmd.Flags().IntVarP(&limit, "limit", "x", 1000, "The messages per second that each topic worker will be limited to [set to 0 or less for maximum throughput]")
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runCmd.Flags().BoolVar(&test, "test", false, "A flag indicating if service should enter into test mode")
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runCmd.Flags().BoolVar(&disableTls, "disable-tls", false, "A flag indicating if service should disable tls encryption")
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rootCmd.AddCommand(runCmd)
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}

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