├── .codecov.yml ├── .github ├── FUNDING.yml └── workflows │ ├── codacy-analysis.yml │ ├── codeql-analysis.yml │ ├── coverage.yml │ └── release.yml ├── .gitignore ├── .goreleaser.yml ├── Dockerfile ├── LICENSE ├── README.md ├── cmd └── loki-auth-proxy.go ├── example ├── loki-auth-proxy.yaml └── loki-auth.yaml ├── go.mod ├── go.sum ├── internal ├── commands │ ├── listen │ │ └── listen.go │ ├── registry.go │ └── registry_test.go ├── config │ ├── config.go │ └── config_test.go └── log │ ├── level.go │ └── level_test.go └── pkg ├── authenticators ├── all │ └── all.go ├── authenticator.go ├── file │ └── file.go └── redis │ └── redis.go └── proxy ├── auth.go ├── header.go ├── options.go ├── proxy.go ├── request.go └── websocket.go /.codecov.yml: -------------------------------------------------------------------------------- 1 | coverage: 2 | range: 80..100 3 | round: down 4 | precision: 2 5 | 6 | status: 7 | project: 8 | default: 9 | enabled: yes 10 | target: auto 11 | if_not_found: success 12 | if_ci_failed: error -------------------------------------------------------------------------------- /.github/FUNDING.yml: -------------------------------------------------------------------------------- 1 | github: [jpbede] -------------------------------------------------------------------------------- /.github/workflows/codacy-analysis.yml: -------------------------------------------------------------------------------- 1 | name: Codacy Analysis CLI 2 | 3 | on: [ "push" ] 4 | 5 | jobs: 6 | codacy-analysis-cli: 7 | name: Codacy Analysis CLI 8 | runs-on: ubuntu-latest 9 | steps: 10 | - name: Checkout code 11 | uses: actions/checkout@main 12 | 13 | - name: Run Codacy Analysis CLI 14 | uses: codacy/codacy-analysis-cli-action@master 15 | with: 16 | project-token: ${{ secrets.CODACY_PROJECT_TOKEN }} 17 | upload: true 18 | max-allowed-issues: 2147483647 19 | run-gosec: "true" 20 | run-staticcheck: "true" 21 | run-docker-tools: "false" 22 | -------------------------------------------------------------------------------- /.github/workflows/codeql-analysis.yml: -------------------------------------------------------------------------------- 1 | # For most projects, this workflow file will not need changing; you simply need 2 | # to commit it to your repository. 3 | # 4 | # You may wish to alter this file to override the set of languages analyzed, 5 | # or to provide custom queries or build logic. 6 | # 7 | # ******** NOTE ******** 8 | # We have attempted to detect the languages in your repository. Please check 9 | # the `language` matrix defined below to confirm you have the correct set of 10 | # supported CodeQL languages. 11 | # 12 | name: "CodeQL" 13 | 14 | on: 15 | push: 16 | branches: [ main ] 17 | pull_request: 18 | # The branches below must be a subset of the branches above 19 | branches: [ main ] 20 | schedule: 21 | - cron: '19 9 * * 5' 22 | 23 | jobs: 24 | analyze: 25 | name: Analyze 26 | runs-on: ubuntu-latest 27 | permissions: 28 | actions: read 29 | contents: read 30 | security-events: write 31 | 32 | strategy: 33 | fail-fast: false 34 | matrix: 35 | language: [ 'go' ] 36 | # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ] 37 | # Learn more: 38 | # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed 39 | 40 | steps: 41 | - name: Checkout repository 42 | uses: actions/checkout@v2 43 | 44 | # Initializes the CodeQL tools for scanning. 45 | - name: Initialize CodeQL 46 | uses: github/codeql-action/init@v1 47 | with: 48 | languages: ${{ matrix.language }} 49 | # If you wish to specify custom queries, you can do so here or in a config file. 50 | # By default, queries listed here will override any specified in a config file. 51 | # Prefix the list here with "+" to use these queries and those in the config file. 52 | # queries: ./path/to/local/query, your-org/your-repo/queries@main 53 | 54 | # Autobuild attempts to build any compiled languages (C/C++, C#, or Java). 55 | # If this step fails, then you should remove it and run the build manually (see below) 56 | - name: Autobuild 57 | uses: github/codeql-action/autobuild@v1 58 | 59 | # ℹ️ Command-line programs to run using the OS shell. 60 | # 📚 https://git.io/JvXDl 61 | 62 | # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines 63 | # and modify them (or add more) to build your code if your project 64 | # uses a compiled language 65 | 66 | #- run: | 67 | # make bootstrap 68 | # make release 69 | 70 | - name: Perform CodeQL Analysis 71 | uses: github/codeql-action/analyze@v1 72 | -------------------------------------------------------------------------------- /.github/workflows/coverage.yml: -------------------------------------------------------------------------------- 1 | name: test 2 | 3 | on: 4 | push: 5 | branches: [ main ] 6 | pull_request: 7 | branches: [ main ] 8 | 9 | jobs: 10 | coverage: 11 | runs-on: ubuntu-18.04 12 | strategy: 13 | matrix: 14 | go: [ "1.15.x", "1.16.x" ] 15 | 16 | steps: 17 | - name: Set up Go 18 | uses: actions/setup-go@v2 19 | with: 20 | go-version: ${{ matrix.go }} 21 | 22 | - name: Check out code into the Go module directory 23 | uses: actions/checkout@v2 24 | 25 | - name: Load cached dependencies 26 | uses: actions/cache@v1 27 | with: 28 | path: ~/go/pkg/mod 29 | key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }} 30 | restore-keys: | 31 | ${{ runner.os }}-go- 32 | 33 | - name: Test build 34 | run: | 35 | go build cmd/loki-auth-proxy.go 36 | 37 | - name: Generate coverage report 38 | run: | 39 | go test `go list ./... | grep -v examples` -coverprofile=coverage.txt -covermode=atomic 40 | 41 | - name: Upload coverage report 42 | uses: codecov/codecov-action@v1 -------------------------------------------------------------------------------- /.github/workflows/release.yml: -------------------------------------------------------------------------------- 1 | name: release 2 | 3 | on: 4 | push: 5 | tags: 6 | - '*' 7 | 8 | jobs: 9 | release: 10 | runs-on: ubuntu-latest 11 | steps: 12 | - name: Checkout 13 | uses: actions/checkout@v2 14 | with: 15 | fetch-depth: 0 16 | - name: Set up Go 17 | uses: actions/setup-go@v2 18 | with: 19 | go-version: 1.16 20 | - name: Docker Login 21 | uses: docker/login-action@v1 22 | with: 23 | registry: ghcr.io 24 | username: ${{ github.repository_owner }} 25 | password: ${{ secrets.HOMEBREW_TAP_GITHUB_TOKEN }} 26 | - name: Run GoReleaser 27 | uses: goreleaser/goreleaser-action@v2 28 | with: 29 | version: latest 30 | args: release --rm-dist 31 | env: 32 | GITHUB_TOKEN: ${{ secrets.HOMEBREW_TAP_GITHUB_TOKEN }} 33 | HOMEBREW_TAP_GITHUB_TOKEN: ${{ secrets.HOMEBREW_TAP_GITHUB_TOKEN }} 34 | - name: Clear 35 | if: always() 36 | run: rm -f ${HOME}/.docker/config.json -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Binaries for programs and plugins 2 | *.exe 3 | *.exe~ 4 | *.dll 5 | *.so 6 | *.dylib 7 | 8 | # Test binary, built with `go test -c` 9 | *.test 10 | 11 | # Output of the go coverage tool, specifically when used with LiteIDE 12 | *.out 13 | 14 | # Dependency directories (remove the comment below to include it) 15 | # vendor/ 16 | dist/ 17 | -------------------------------------------------------------------------------- /.goreleaser.yml: -------------------------------------------------------------------------------- 1 | before: 2 | hooks: 3 | - go mod tidy 4 | 5 | builds: 6 | - binary: loki-auth-proxy 7 | main: ./cmd/ 8 | env: 9 | - CGO_ENABLED=0 10 | ldflags: 11 | - -s -w -X main.version={{.Version}} -X main.commit={{.Commit}} 12 | goos: 13 | - linux 14 | - windows 15 | - darwin 16 | 17 | archives: 18 | - replacements: 19 | darwin: Darwin 20 | linux: Linux 21 | windows: Windows 22 | 386: i386 23 | amd64: x86_64 24 | 25 | checksum: 26 | name_template: 'checksums.txt' 27 | 28 | snapshot: 29 | name_template: "{{ .Tag }}-next" 30 | 31 | changelog: 32 | sort: asc 33 | filters: 34 | exclude: 35 | - '^docs:' 36 | - '^test:' 37 | 38 | gomod: 39 | proxy: true 40 | env: 41 | - GOPROXY=https://proxy.golang.org,direct 42 | - GOSUMDB=sum.golang.org 43 | 44 | dockers: 45 | - image_templates: 46 | - ghcr.io/jpbede/loki-auth-proxy:latest 47 | - ghcr.io/jpbede/loki-auth-proxy:{{ .Tag }} 48 | 49 | nfpms: 50 | - id: loki-auth-proxy 51 | vendor: Jan-Philipp Benecke 52 | maintainer: Jan-Philipp Benecke 53 | license: MIT License 54 | description: "Stateless Grafana Loki authentication proxy" 55 | formats: 56 | - apk 57 | - deb 58 | - rpm 59 | 60 | brews: 61 | - name: loki-auth-proxy 62 | goarm: 6 63 | tap: 64 | owner: jpbede 65 | name: homebrew-tap 66 | token: "{{ .Env.HOMEBREW_TAP_GITHUB_TOKEN }}" 67 | 68 | commit_author: 69 | name: goreleaserbot 70 | email: goreleaser@carlosbecker.com 71 | 72 | folder: Formula 73 | 74 | homepage: "https://github.com/jpbede/loki-auth-proxy" 75 | 76 | description: "Stateless Grafana Loki authentication proxy" 77 | 78 | install: | 79 | bin.install "loki-auth-proxy" 80 | test: | 81 | system "#{bin}/loki-auth-proxy" -------------------------------------------------------------------------------- /Dockerfile: -------------------------------------------------------------------------------- 1 | FROM alpine:3.13.5 2 | COPY loki-auth-proxy / 3 | EXPOSE 8081 4 | VOLUME ["/etc/loki-auth-proxy.yaml"] 5 | CMD ["/loki-auth-proxy", "-c", "/etc/loki-auth-proxy.yaml", "l"] 6 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2021 Jan-Philipp Benecke 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Grafana Loki - Stateless multi tenant authentication proxy 2 | [![PkgGoDev](https://pkg.go.dev/badge/go.bnck.me/loki-auth-proxy)](https://pkg.go.dev/go.bnck.me/loki-auth-proxy) 3 | [![Codacy Badge](https://app.codacy.com/project/badge/Grade/a7da697dfae94a39bb74394ccf472df7)](https://www.codacy.com/gh/jpbede/loki-auth-proxy/dashboard) 4 | [![codecov](https://codecov.io/gh/jpbede/loki-auth-proxy/branch/main/graph/badge.svg?token=g6JohOjiZm)](https://codecov.io/gh/jpbede/loki-auth-proxy) 5 | 6 | Stateless multi tenant authentication proxy, that handles authentication and setting `X-Scope-OrgID` for Grafana Loki. 7 | 8 | **Please be nice to me, the project is work in progress :)** 9 | 10 | ## Requirements 11 | To use this, Grafana Loki needs to be configured in multi tenant mode with `auth_enabled: true` as described in the [official docs](https://grafana.com/docs/loki/latest/operations/multi-tenancy/). 12 | 13 | ## Installing 14 | 15 | ### Binaries 16 | You will find pre-compiled binaries and packages for the most common OS under the [releases](https://github.com/jpbede/loki-auth-proxy/releases). 17 | 18 | ### Docker 19 | ```shell 20 | docker run -v $(pwd)/loki-auth-proxy.yml:/etc/loki-auth-proxy.yml -v $(pwd)/loki-auth.yml:/etc/loki-auth.yml -p 8081:8081 ghcr.io/jpbede/loki-auth-proxy:latest 21 | ``` 22 | 23 | or via `docker-compose.yml` 24 | 25 | ```yaml 26 | version: "3" 27 | services: 28 | auth-proxy: 29 | image: ghcr.io/jpbede/loki-auth-proxy:latest 30 | ports: 31 | - 8081:8081 32 | volumes: 33 | - "/etc/loki-auth-proxy.yml:/etc/loki-auth-proxy.yaml" 34 | - "/etc/loki-auth.yml:/etc/loki-auth.yml" 35 | ``` 36 | 37 | ### macOS 38 | Simply use `homebrew` (https://brew.sh/) 39 | 40 | To install `loki-auth-proxy` use following command `brew install jpbede/tap/loki-auth-proxy` 41 | 42 | ## Using it 43 | An example configuration you can find at [example/loki-auth-proxy.yaml](example/loki-auth-proxy.yaml). 44 | -------------------------------------------------------------------------------- /cmd/loki-auth-proxy.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "fmt" 5 | "github.com/urfave/cli/v2" 6 | "go.bnck.me/loki-auth-proxy/internal/commands" 7 | "log" 8 | "os" 9 | 10 | _ "go.bnck.me/loki-auth-proxy/internal/commands/listen" 11 | _ "go.bnck.me/loki-auth-proxy/pkg/authenticators/all" 12 | ) 13 | 14 | var ( 15 | version = "dev" 16 | commit = "none" 17 | ) 18 | 19 | func main() { 20 | app := &cli.App{ 21 | Name: "loki-auth-proxy", 22 | Usage: "Grafana Loki authentication proxy", 23 | Version: fmt.Sprintf("%s-%s", version, commit), 24 | Commands: commands.Get(), 25 | Flags: []cli.Flag{ 26 | &cli.StringFlag{ 27 | Name: "config", 28 | Aliases: []string{"c"}, 29 | DefaultText: "/etc/loki-auth-proxy.yaml", 30 | }, 31 | }, 32 | } 33 | 34 | // run app 35 | if err := app.Run(os.Args); err != nil { 36 | log.Fatal(err) 37 | } 38 | } 39 | -------------------------------------------------------------------------------- /example/loki-auth-proxy.yaml: -------------------------------------------------------------------------------- 1 | http: 2 | listen: :8081 3 | 4 | backend: 5 | distributor: distributor:3100 6 | query_frontend: query-frontend:3100 7 | querier: ws://querier:3100 8 | 9 | # disable prometheus endpoint, default is enabled 10 | prometheus: false 11 | 12 | log: 13 | level: debug 14 | 15 | authenticator: 16 | name: file 17 | config: 18 | path: example/loki-auth.yaml 19 | -------------------------------------------------------------------------------- /example/loki-auth.yaml: -------------------------------------------------------------------------------- 1 | test: 2 | password: thisisasupersupersecret 3 | org_id: test 4 | -------------------------------------------------------------------------------- /go.mod: -------------------------------------------------------------------------------- 1 | module go.bnck.me/loki-auth-proxy 2 | 3 | go 1.16 4 | 5 | require ( 6 | github.com/fasthttp/router v1.3.13 7 | github.com/fasthttp/websocket v1.4.3 8 | github.com/jinzhu/configor v1.2.1 9 | github.com/jpbede/fasthttp-prometheus-middleware v1.1.1 10 | github.com/prometheus/client_golang v1.10.0 11 | github.com/rs/zerolog v1.22.0 12 | github.com/stretchr/testify v1.7.0 13 | github.com/urfave/cli/v2 v2.3.0 14 | github.com/valyala/fasthttp v1.34.0 15 | gopkg.in/yaml.v2 v2.3.0 16 | ) 17 | -------------------------------------------------------------------------------- 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v0.0.0-20210520110740-c57c45b83e0a/go.mod h1:dmPawKuiAeG/aFYVs2i+Dyosoo7FNcm+Pi8iK6ZUrX8= 276 | github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg65j358z/aeFdxmN0P9QXhEzd20vsDc= 277 | github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo= 278 | github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc= 279 | github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo= 280 | github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE= 281 | github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88= 282 | github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc= 283 | github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA= 284 | github.com/soheilhy/cmux v0.1.4/go.mod 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github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI= 295 | github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4= 296 | github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY= 297 | github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= 298 | github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U= 299 | github.com/urfave/cli v1.20.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA= 300 | github.com/urfave/cli v1.22.1 h1:+mkCCcOFKPnCmVYVcURKps1Xe+3zP90gSYGNfRkjoIY= 301 | github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0= 302 | github.com/urfave/cli/v2 v2.3.0 h1:qph92Y649prgesehzOrQjdWyxFOp/QVM+6imKHad91M= 303 | github.com/urfave/cli/v2 v2.3.0/go.mod h1:LJmUH05zAU44vOAcrfzZQKsZbVcdbOG8rtL3/XcUArI= 304 | github.com/valyala/bytebufferpool v1.0.0 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github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74= 315 | go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU= 316 | go.etcd.io/etcd v0.0.0-20191023171146-3cf2f69b5738/go.mod h1:dnLIgRNXwCJa5e+c6mIZCrds/GIG4ncV9HhK5PX7jPg= 317 | go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk= 318 | go.opencensus.io v0.20.2/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk= 319 | go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw= 320 | go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE= 321 | go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ= 322 | go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0= 323 | go.uber.org/multierr v1.3.0/go.mod h1:VgVr7evmIr6uPjLBxg28wmKNXyqE9akIJ5XnfpiKl+4= 324 | go.uber.org/tools v0.0.0-20190618225709-2cfd321de3ee/go.mod h1:vJERXedbb3MVM5f9Ejo0C68/HhF8uaILCdgjnY+goOA= 325 | go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q= 326 | go.uber.org/zap v1.13.0/go.mod h1:zwrFLgMcdUuIBviXEYEH1YKNaOBnKXsx2IPda5bBwHM= 327 | golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4= 328 | golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4= 329 | golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= 330 | golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= 331 | golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= 332 | golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= 333 | golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto= 334 | golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8= 335 | golang.org/x/crypto v0.0.0-20220214200702-86341886e292/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4= 336 | golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA= 337 | golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE= 338 | golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU= 339 | golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE= 340 | golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc= 341 | golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc= 342 | golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc= 343 | golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg= 344 | golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA= 345 | golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= 346 | golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= 347 | golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= 348 | golang.org/x/net v0.0.0-20181023162649-9b4f9f5ad519/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= 349 | golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= 350 | golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= 351 | golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= 352 | golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= 353 | golang.org/x/net v0.0.0-20190125091013-d26f9f9a57f3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= 354 | golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= 355 | golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= 356 | golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= 357 | golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks= 358 | golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= 359 | golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= 360 | 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h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 478 | gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 479 | gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 480 | gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 481 | gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 482 | gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU= 483 | gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 484 | gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo= 485 | gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= 486 | honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= 487 | honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= 488 | honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= 489 | honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= 490 | sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o= 491 | sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU= 492 | -------------------------------------------------------------------------------- /internal/commands/listen/listen.go: -------------------------------------------------------------------------------- 1 | package listen 2 | 3 | import ( 4 | "errors" 5 | "github.com/rs/zerolog" 6 | "github.com/rs/zerolog/log" 7 | "github.com/urfave/cli/v2" 8 | "go.bnck.me/loki-auth-proxy/internal/commands" 9 | "go.bnck.me/loki-auth-proxy/internal/config" 10 | intLog "go.bnck.me/loki-auth-proxy/internal/log" 11 | "go.bnck.me/loki-auth-proxy/pkg/authenticators" 12 | "go.bnck.me/loki-auth-proxy/pkg/proxy" 13 | "os" 14 | ) 15 | 16 | func init() { 17 | commands.RegisterCommand(&cli.Command{ 18 | Name: "listen", 19 | Aliases: []string{"l"}, 20 | Usage: "Starts the loki auth proxy", 21 | Action: runListen, 22 | }) 23 | } 24 | 25 | func runListen(c *cli.Context) error { 26 | cfg := config.Get() 27 | if err := cfg.Load(c.String("config")); err != nil { 28 | return err 29 | } 30 | 31 | log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stderr}) 32 | zerolog.SetGlobalLevel(intLog.DecodeLogLevel(cfg.Log.Level)) 33 | 34 | if cfg.Backend.Distributor == "" { 35 | return errors.New("no distributor specified") 36 | } 37 | 38 | if cfg.Backend.QueryFrontend == "" { 39 | return errors.New("no query-frontend specified") 40 | } 41 | 42 | authenticator, err := authenticators.GetAuthenticator(cfg.Authenticator.Name, cfg.Authenticator.Config) 43 | if err != nil { 44 | return err 45 | } 46 | 47 | p := proxy.New(cfg.Backend.Distributor, cfg.Backend.QueryFrontend, cfg.Backend.Querier, authenticator) 48 | 49 | opts := []proxy.Option{proxy.WithLogger(&log.Logger)} 50 | if cfg.Prometheus { 51 | opts = append(opts, proxy.WithPrometheus()) 52 | } 53 | 54 | log.Info().Msgf("Listening on %s", cfg.HTTP.Listen) 55 | return p.Run(cfg.HTTP.Listen, opts...) 56 | } 57 | -------------------------------------------------------------------------------- /internal/commands/registry.go: -------------------------------------------------------------------------------- 1 | package commands 2 | 3 | import "github.com/urfave/cli/v2" 4 | 5 | var commands []*cli.Command 6 | 7 | // Get returns all registered commands for the cli 8 | func Get() []*cli.Command { 9 | return commands 10 | } 11 | 12 | // RegisterCommand adds a command to the registry 13 | func RegisterCommand(command *cli.Command) bool { 14 | commands = append(commands, command) 15 | return true 16 | } 17 | -------------------------------------------------------------------------------- /internal/commands/registry_test.go: -------------------------------------------------------------------------------- 1 | package commands_test 2 | 3 | import ( 4 | "github.com/stretchr/testify/assert" 5 | "github.com/urfave/cli/v2" 6 | "go.bnck.me/loki-auth-proxy/internal/commands" 7 | "testing" 8 | ) 9 | 10 | func TestGet(t *testing.T) { 11 | assert.Equal(t, 0, len(commands.Get())) 12 | } 13 | 14 | func TestRegisterCommand(t *testing.T) { 15 | beforeCnt := len(commands.Get()) 16 | commands.RegisterCommand(&cli.Command{ 17 | Name: "test", 18 | }) 19 | afterCnt := len(commands.Get()) 20 | 21 | assert.Greater(t, afterCnt, beforeCnt) 22 | } 23 | -------------------------------------------------------------------------------- /internal/config/config.go: -------------------------------------------------------------------------------- 1 | package config 2 | 3 | import "github.com/jinzhu/configor" 4 | 5 | // Config holds the application config 6 | type Config struct { 7 | HTTP struct { 8 | Listen string `default:":8080"` 9 | } 10 | 11 | Prometheus bool `default:"true"` 12 | 13 | Backend struct { 14 | Distributor string 15 | QueryFrontend string `yaml:"query_frontend"` 16 | Querier string 17 | } 18 | 19 | Authenticator struct { 20 | Name string 21 | Config map[string]string 22 | } 23 | 24 | Log struct { 25 | Level string `default:"info"` 26 | } 27 | } 28 | 29 | var config *Config 30 | 31 | // Get returns a existing config or creates a new 32 | func Get() *Config { 33 | if config == nil { 34 | config = &Config{} 35 | } 36 | return config 37 | } 38 | 39 | // Load loads a config from filesystem 40 | func (c *Config) Load(path string) error { 41 | return configor.New(&configor.Config{ENVPrefix: "LOKI_AUTH"}).Load(c, path) 42 | } 43 | -------------------------------------------------------------------------------- /internal/config/config_test.go: -------------------------------------------------------------------------------- 1 | package config_test 2 | 3 | import ( 4 | "github.com/stretchr/testify/assert" 5 | "go.bnck.me/loki-auth-proxy/internal/config" 6 | "testing" 7 | ) 8 | 9 | func TestGet(t *testing.T) { 10 | actualCfg := config.Get() 11 | 12 | assert.NotNil(t, actualCfg) 13 | 14 | expectedCfg := &config.Config{HTTP: struct { 15 | Listen string "default:\":8080\"" 16 | }{Listen: ""}, Prometheus: false, Authenticator: struct { 17 | Name string 18 | Config map[string]string 19 | }{Name: "", Config: map[string]string(nil)}, Log: struct { 20 | Level string "default:\"info\"" 21 | }{Level: ""}} 22 | 23 | assert.Equal(t, expectedCfg, actualCfg) 24 | } 25 | 26 | func TestConfig_Load(t *testing.T) { 27 | cfg := config.Get() 28 | assert.NotNil(t, cfg) 29 | 30 | assert.NoError(t, cfg.Load("../../example/loki-auth-proxy.yaml")) 31 | 32 | expectedCfg := &config.Config{HTTP: struct { 33 | Listen string "default:\":8080\"" 34 | }{Listen: ":8081"}, Prometheus: false, Backend: struct { 35 | Distributor string 36 | QueryFrontend string "yaml:\"query_frontend\"" 37 | Querier string 38 | }{Distributor: "distributor:3100", QueryFrontend: "query-frontend:3100", Querier: "querier:3100"}, Authenticator: struct { 39 | Name string 40 | Config map[string]string 41 | }{Name: "file", Config: map[string]string{"path": "example/loki-auth.yaml"}}, Log: struct { 42 | Level string "default:\"info\"" 43 | }{Level: "debug"}} 44 | 45 | assert.Equal(t, expectedCfg, cfg) 46 | } 47 | -------------------------------------------------------------------------------- /internal/log/level.go: -------------------------------------------------------------------------------- 1 | package log 2 | 3 | import ( 4 | "github.com/rs/zerolog" 5 | "strings" 6 | ) 7 | 8 | // DecodeLogLevel decodes a string loglevel to its constant 9 | func DecodeLogLevel(loglevel string) zerolog.Level { 10 | switch strings.ToLower(loglevel) { 11 | case "debug": 12 | return zerolog.DebugLevel 13 | case "info": 14 | return zerolog.InfoLevel 15 | case "warn": 16 | return zerolog.WarnLevel 17 | case "error": 18 | return zerolog.ErrorLevel 19 | case "fatal": 20 | return zerolog.FatalLevel 21 | default: 22 | return zerolog.InfoLevel 23 | } 24 | } 25 | -------------------------------------------------------------------------------- /internal/log/level_test.go: -------------------------------------------------------------------------------- 1 | package log_test 2 | 3 | import ( 4 | "github.com/rs/zerolog" 5 | "github.com/stretchr/testify/assert" 6 | "go.bnck.me/loki-auth-proxy/internal/log" 7 | "testing" 8 | ) 9 | 10 | func TestDecodeLogLevel(t *testing.T) { 11 | assert.Equal(t, zerolog.InfoLevel, log.DecodeLogLevel("bla"), "Unknown level should match InfoLevel") 12 | assert.Equal(t, zerolog.DebugLevel, log.DecodeLogLevel("debug"), "String debug does not match DebugLevel") 13 | assert.Equal(t, zerolog.InfoLevel, log.DecodeLogLevel("info"), "String info does not match InfoLevel") 14 | assert.Equal(t, zerolog.WarnLevel, log.DecodeLogLevel("warn"), "String warn does not match WarnLevel") 15 | assert.Equal(t, zerolog.ErrorLevel, log.DecodeLogLevel("error"), "String error does not match ErrorLevel") 16 | assert.Equal(t, zerolog.FatalLevel, log.DecodeLogLevel("fatal"), "String fatal does not match FatalLevel") 17 | } 18 | -------------------------------------------------------------------------------- /pkg/authenticators/all/all.go: -------------------------------------------------------------------------------- 1 | package all 2 | 3 | import ( 4 | // import all existing authenticators 5 | _ "go.bnck.me/loki-auth-proxy/pkg/authenticators/file" 6 | _ "go.bnck.me/loki-auth-proxy/pkg/authenticators/redis" 7 | ) 8 | -------------------------------------------------------------------------------- /pkg/authenticators/authenticator.go: -------------------------------------------------------------------------------- 1 | package authenticators 2 | 3 | import ( 4 | "fmt" 5 | "log" 6 | ) 7 | 8 | // Authenticator performs authentication 9 | type Authenticator interface { 10 | // Authenticate checks given credentials 11 | Authenticate(username, password string) bool 12 | // GetTenantID returns the ID for the X-Scope-OrgID 13 | GetTenantID(username string) string 14 | } 15 | 16 | // InitializerFunc is a function to create a new authenticator 17 | type InitializerFunc func(map[string]string) (Authenticator, error) 18 | 19 | var authenticators = map[string]InitializerFunc{} 20 | 21 | // RegisterAuthenticator add a authenticator to the registry 22 | func RegisterAuthenticator(name string, initializerFunc InitializerFunc) { 23 | if _, ok := authenticators[name]; ok { 24 | log.Fatalf("Cannot register authenticator %s multiple times", name) 25 | } 26 | authenticators[name] = initializerFunc 27 | } 28 | 29 | // GetAuthenticator returns a authenticator by name 30 | func GetAuthenticator(name string, config map[string]string) (Authenticator, error) { 31 | if initializerFunc, ok := authenticators[name]; ok { 32 | return initializerFunc(config) 33 | } 34 | return nil, fmt.Errorf("Authenticator %s not found", name) 35 | } 36 | -------------------------------------------------------------------------------- /pkg/authenticators/file/file.go: -------------------------------------------------------------------------------- 1 | package file 2 | 3 | import ( 4 | "errors" 5 | "go.bnck.me/loki-auth-proxy/pkg/authenticators" 6 | "gopkg.in/yaml.v2" 7 | "io/ioutil" 8 | ) 9 | 10 | type user struct { 11 | Password string 12 | OrgID string `yaml:"org_id"` 13 | } 14 | 15 | // File represents the file authenticator 16 | type File struct { 17 | Path string 18 | 19 | credentials map[string]user 20 | } 21 | 22 | func init() { 23 | authenticators.RegisterAuthenticator("file", New) 24 | } 25 | 26 | // New creates a new File authenticator 27 | func New(config map[string]string) (authenticators.Authenticator, error) { 28 | fileAuth := File{} 29 | 30 | // check if path is given 31 | path, ok := config["path"] 32 | if !ok { 33 | return nil, errors.New("FileAuthenticator: no file path given") 34 | } 35 | 36 | fileAuth.Path = path 37 | fileBytes, err := ioutil.ReadFile(path) 38 | if err != nil { 39 | return nil, err 40 | } 41 | if err := yaml.Unmarshal(fileBytes, &fileAuth.credentials); err != nil { 42 | return nil, err 43 | } 44 | 45 | return &fileAuth, nil 46 | } 47 | 48 | // Authenticate checks given credentials 49 | func (f *File) Authenticate(username, password string) bool { 50 | if user, ok := f.credentials[username]; ok { 51 | return password == user.Password 52 | } 53 | return false 54 | } 55 | 56 | // GetTenantID returns the ID for the X-Scope-OrgID 57 | func (f *File) GetTenantID(username string) string { 58 | if user, ok := f.credentials[username]; ok { 59 | return user.OrgID 60 | } 61 | return "" 62 | } 63 | -------------------------------------------------------------------------------- /pkg/authenticators/redis/redis.go: -------------------------------------------------------------------------------- 1 | package redis 2 | 3 | import ( 4 | "errors" 5 | "go.bnck.me/loki-auth-proxy/pkg/authenticators" 6 | ) 7 | 8 | // Redis represents the redis authenticator 9 | type Redis struct { 10 | Host string 11 | DB string 12 | } 13 | 14 | func init() { 15 | authenticators.RegisterAuthenticator("redis", New) 16 | } 17 | 18 | // New creates a new Redis authenticator 19 | func New(config map[string]string) (authenticators.Authenticator, error) { 20 | redisAuth := Redis{} 21 | 22 | // check if path is given 23 | host, ok := config["host"] 24 | if !ok { 25 | return nil, errors.New("RedisAuthenticator: no host given") 26 | } 27 | redisAuth.Host = host 28 | 29 | if db, ok := config["db"]; ok { 30 | redisAuth.DB = db 31 | } else { 32 | redisAuth.DB = "0" 33 | } 34 | 35 | return &redisAuth, nil 36 | } 37 | 38 | // Authenticate checks given credentials 39 | func (r *Redis) Authenticate(username, password string) bool { 40 | return false 41 | } 42 | 43 | // GetTenantID returns the ID for the X-Scope-OrgID 44 | func (r *Redis) GetTenantID(username string) string { 45 | return username 46 | } 47 | -------------------------------------------------------------------------------- /pkg/proxy/auth.go: -------------------------------------------------------------------------------- 1 | package proxy 2 | 3 | import ( 4 | "bytes" 5 | "encoding/base64" 6 | "github.com/prometheus/client_golang/prometheus/promhttp" 7 | "github.com/valyala/fasthttp" 8 | "github.com/valyala/fasthttp/fasthttpadaptor" 9 | ) 10 | 11 | // AuthHandler return handler func for fasthttp that performs authentication and then calls a sub handler passing the username 12 | func (p *Proxy) AuthHandler(subHandler func(ctx *fasthttp.RequestCtx, username string)) fasthttp.RequestHandler { 13 | return func(ctx *fasthttp.RequestCtx) { 14 | if p.logger != nil { 15 | p.logger.Debug(). 16 | Str("host", string(ctx.Request.Host())). 17 | Msg("Got request to proxy, checking auth first") 18 | } 19 | 20 | if auth := ctx.Request.Header.Peek("Authorization"); auth != nil { 21 | if bytes.HasPrefix(auth, basicAuthPrefix) { 22 | payload, err := base64.StdEncoding.DecodeString(string(auth[len(basicAuthPrefix):])) 23 | if err == nil { 24 | pair := bytes.SplitN(payload, []byte(":"), 2) 25 | if len(pair) == 2 && p.Authenticator.Authenticate(string(pair[0]), string(pair[1])) { 26 | subHandler(ctx, string(pair[0])) 27 | return 28 | } 29 | if p.logger != nil { 30 | p.logger.Debug(). 31 | Str("host", string(ctx.Request.Host())). 32 | Str("username", string(pair[0])). 33 | Msg("Auth invalid, rejecting") 34 | } 35 | } else if p.logger != nil { 36 | p.logger.Error(). 37 | Str("host", string(ctx.Request.Host())). 38 | Err(err). 39 | Msg("A error occurred while checking auth") 40 | } 41 | } 42 | } 43 | 44 | hdl := fasthttpadaptor.NewFastHTTPHandler(promhttp.Handler()) 45 | hdl(ctx) 46 | 47 | // Request Basic Authentication otherwise 48 | ctx.Error(fasthttp.StatusMessage(fasthttp.StatusUnauthorized), fasthttp.StatusUnauthorized) 49 | } 50 | } 51 | -------------------------------------------------------------------------------- /pkg/proxy/header.go: -------------------------------------------------------------------------------- 1 | package proxy 2 | 3 | import ( 4 | "github.com/valyala/fasthttp" 5 | "net" 6 | ) 7 | 8 | // ref to: https://golang.org/src/net/http/httputil/reverseproxy.go#L169 9 | var hopByHopHeaders = []string{ 10 | "Connection", 11 | "Proxy-Connection", 12 | "Keep-Alive", 13 | "Proxy-Authenticate", 14 | "Proxy-Authorization", 15 | "Te", 16 | "Trailer", 17 | "Transfer-Encoding", 18 | "Upgrade", 19 | } 20 | 21 | func (p *Proxy) removeHopByHopHeaders(req *fasthttp.Request, resp *fasthttp.Response) { 22 | for _, h := range hopByHopHeaders { 23 | if req != nil { 24 | req.Header.Del(h) 25 | } 26 | if resp != nil { 27 | resp.Header.Del(h) 28 | } 29 | } 30 | } 31 | 32 | func (p *Proxy) addXForwardedHeader(ctx *fasthttp.RequestCtx) { 33 | if ip, _, err := net.SplitHostPort(ctx.RemoteAddr().String()); err == nil { 34 | ctx.Request.Header.Add("X-Forwarded-For", ip) 35 | } 36 | 37 | ctx.Request.Header.Add("X-Forwarded-Host", string(ctx.Request.Host())) 38 | } 39 | -------------------------------------------------------------------------------- /pkg/proxy/options.go: -------------------------------------------------------------------------------- 1 | package proxy 2 | 3 | import "github.com/rs/zerolog" 4 | 5 | // Option function that enables a feature on Proxy 6 | type Option func(proxy *Proxy) 7 | 8 | // WithPrometheus enables prometheus metric endpoint 9 | func WithPrometheus() Option { 10 | return func(proxy *Proxy) { 11 | proxy.Prometheus = true 12 | } 13 | } 14 | 15 | // WithLogger adds a logger to log requests 16 | func WithLogger(logger *zerolog.Logger) Option { 17 | return func(proxy *Proxy) { 18 | proxy.logger = logger 19 | } 20 | } 21 | -------------------------------------------------------------------------------- /pkg/proxy/proxy.go: -------------------------------------------------------------------------------- 1 | package proxy 2 | 3 | import ( 4 | "github.com/fasthttp/router" 5 | fasthttpprom "github.com/jpbede/fasthttp-prometheus-middleware" 6 | "github.com/rs/zerolog" 7 | "github.com/valyala/fasthttp" 8 | "go.bnck.me/loki-auth-proxy/pkg/authenticators" 9 | ) 10 | 11 | // Proxy represents the loki proxy 12 | type Proxy struct { 13 | Distributor string 14 | QueryFrontend string 15 | Querier string 16 | Authenticator authenticators.Authenticator 17 | Prometheus bool 18 | 19 | logger *zerolog.Logger 20 | distributorClient *fasthttp.HostClient 21 | queryFrontendClient *fasthttp.HostClient 22 | querierClient *fasthttp.HostClient 23 | } 24 | 25 | var basicAuthPrefix = []byte("Basic ") 26 | var clientName = "loki-auth-proxy" 27 | 28 | func New(distributor, queryFrontend, querier string, authenticator authenticators.Authenticator) *Proxy { 29 | return &Proxy{ 30 | Distributor: distributor, 31 | QueryFrontend: queryFrontend, 32 | Querier: querier, 33 | Authenticator: authenticator, 34 | 35 | distributorClient: &fasthttp.HostClient{ 36 | Addr: distributor, 37 | Name: clientName, 38 | }, 39 | queryFrontendClient: &fasthttp.HostClient{ 40 | Addr: queryFrontend, 41 | Name: clientName, 42 | }, 43 | } 44 | } 45 | 46 | // ProxyRequest proxies the request to the backend servers 47 | func (p *Proxy) ProxyRequest(proxyClient *fasthttp.HostClient) func(ctx *fasthttp.RequestCtx, username string) { 48 | return func(ctx *fasthttp.RequestCtx, username string) { 49 | if p.logger != nil { 50 | p.logger.Debug(). 51 | Str("for-host", string(ctx.Request.Host())). 52 | Str("backend", proxyClient.Addr). 53 | Msg("Proxying request to backend") 54 | } 55 | 56 | // prepare fasthttp context 57 | p.prepareContext(ctx, proxyClient) 58 | 59 | // get org id form authenticator for username 60 | ctx.Request.Header.Add("X-Scope-OrgID", p.Authenticator.GetTenantID(username)) 61 | 62 | // run request against backend 63 | if err := proxyClient.Do(&ctx.Request, &ctx.Response); err != nil { 64 | if p.logger != nil { 65 | p.logger.Error(). 66 | Err(err). 67 | Msg("Errored while getting response from backend") 68 | } 69 | 70 | ctx.Response.SetStatusCode(fasthttp.StatusInternalServerError) 71 | ctx.Response.SetBody([]byte(err.Error())) 72 | } else if p.logger != nil { 73 | p.logger.Debug(). 74 | Str("header", ctx.Response.Header.String()). 75 | Msg("Got response from backend") 76 | } 77 | 78 | // postprocess fasthttp context 79 | p.postProcessContext(ctx) 80 | } 81 | } 82 | 83 | // Run starts listening on given address 84 | func (p *Proxy) Run(listenAddress string, opts ...Option) error { 85 | // run options on proxy object 86 | for _, opt := range opts { 87 | opt(p) 88 | } 89 | 90 | // create router 91 | r := router.New() 92 | // distributor 93 | r.POST("/loki/api/v1/push", p.AuthHandler(p.ProxyRequest(p.distributorClient))) 94 | r.POST("/api/prom/push", p.AuthHandler(p.ProxyRequest(p.distributorClient))) 95 | // querier 96 | r.ANY("/loki/api/v1/tail", p.AuthHandler(p.WebsocketProxy())) 97 | r.ANY("/api/prom/tail ", p.AuthHandler(p.WebsocketProxy())) 98 | // query-frontend 99 | r.ANY("/loki/{path:*}", p.AuthHandler(p.ProxyRequest(p.queryFrontendClient))) 100 | r.ANY("/api/{path:*}", p.AuthHandler(p.ProxyRequest(p.queryFrontendClient))) 101 | handler := r.Handler 102 | 103 | // add prometheus endpoint when enabled 104 | if p.Prometheus { 105 | prom := fasthttpprom.NewPrometheus("loki_auth_proxy") 106 | prom.Use(r) 107 | handler = prom.Handler 108 | } 109 | 110 | // now listen and serve 111 | return fasthttp.ListenAndServe(listenAddress, handler) 112 | } 113 | -------------------------------------------------------------------------------- /pkg/proxy/request.go: -------------------------------------------------------------------------------- 1 | package proxy 2 | 3 | import "github.com/valyala/fasthttp" 4 | 5 | func (p *Proxy) prepareContext(ctx *fasthttp.RequestCtx, proxyClient *fasthttp.HostClient) { 6 | // add X-Forwarded header to the request 7 | p.addXForwardedHeader(ctx) 8 | 9 | // Remove hop-by-hop headers from request 10 | p.removeHopByHopHeaders(&ctx.Request, nil) 11 | 12 | // set Host header to configured one so we can support virtual hosts 13 | // and not only IP addresses 14 | ctx.Request.SetHost(proxyClient.Addr) 15 | } 16 | 17 | func (p *Proxy) postProcessContext(ctx *fasthttp.RequestCtx) { 18 | // Remove hop-by-hop headers from response 19 | p.removeHopByHopHeaders(nil, &ctx.Response) 20 | } 21 | -------------------------------------------------------------------------------- /pkg/proxy/websocket.go: -------------------------------------------------------------------------------- 1 | package proxy 2 | 3 | import ( 4 | "github.com/fasthttp/websocket" 5 | "github.com/valyala/fasthttp" 6 | ) 7 | 8 | // lot of this code based on https://github.com/yeqown/fasthttp-reverse-proxy 9 | 10 | // WebsocketProxy return a fasthttp handler for proxying websockets 11 | func (p *Proxy) WebsocketProxy() func(ctx *fasthttp.RequestCtx, username string) { 12 | return func(ctx *fasthttp.RequestCtx, username string) { 13 | if success := websocket.FastHTTPIsWebSocketUpgrade(ctx); success { 14 | p.logger.Debug().Msg("Clients requests a upgrade to WebSocket") 15 | } 16 | 17 | dialer := websocket.DefaultDialer 18 | upgrader := &websocket.FastHTTPUpgrader{ 19 | ReadBufferSize: 1024, 20 | WriteBufferSize: 1024, 21 | } 22 | 23 | connBackend, _, err := dialer.Dial(p.Querier, nil) 24 | if err != nil { 25 | ctx.Error(err.Error(), fasthttp.StatusServiceUnavailable) 26 | } 27 | 28 | err = upgrader.Upgrade(ctx, func(connPub *websocket.Conn) { 29 | defer connPub.Close() 30 | 31 | var ( 32 | errClient = make(chan error, 1) 33 | errBackend = make(chan error, 1) 34 | message string 35 | ) 36 | 37 | go replicateWebsocketMessage(connPub, connBackend, errClient) // response 38 | go replicateWebsocketMessage(connBackend, connPub, errBackend) // request 39 | 40 | for { 41 | select { 42 | case err = <-errClient: 43 | message = "websocketproxy: Error when copying response: %v" 44 | case err = <-errBackend: 45 | message = "websocketproxy: Error when copying request: %v" 46 | } 47 | 48 | // log error except '*websocket.CloseError' 49 | if _, ok := err.(*websocket.CloseError); !ok { 50 | p.logger.Error().Msgf(message, err) 51 | } 52 | } 53 | }) 54 | 55 | } 56 | } 57 | 58 | func replicateWebsocketMessage(src, dst *websocket.Conn, errChan chan error) { 59 | for { 60 | msgType, msg, err := src.ReadMessage() 61 | if err != nil { 62 | if ce, ok := err.(*websocket.CloseError); ok { 63 | msg = websocket.FormatCloseMessage(ce.Code, ce.Text) 64 | } else { 65 | msg = websocket.FormatCloseMessage(websocket.CloseAbnormalClosure, err.Error()) 66 | } 67 | 68 | errChan <- err 69 | if err = dst.WriteMessage(websocket.CloseMessage, msg); err != nil { 70 | } 71 | break 72 | } 73 | 74 | err = dst.WriteMessage(msgType, msg) 75 | if err != nil { 76 | errChan <- err 77 | break 78 | } 79 | } 80 | } 81 | --------------------------------------------------------------------------------