Add grafana tempo

tempo.rb

@@ -0,0 +1,121 @@
+class Tempo < Formula
+    desc "Grafana Tempo is a high volume, minimal dependency distributed tracing backend"
+    homepage "https://grafana.com/docs/tempo/latest"
+    url "https://github.com/grafana/tempo/archive/refs/tags/v2.4.2.tar.gz"
+    sha256 "f31403772040c219b80893e6951c4613c94945937ab2b07f610dce44820d34e5"
+    license "Apache-2.0"
+
+    depends_on "go" => :build
+    #depends_on "node" => :build
+    #depends_on "yarn" => :build
+
+    on_linux do
+      depends_on "systemd" => :build
+    end
+
+    def install
+      # ldflags = %W[
+      #   -s -w
+      #   -X github.com/grafana/tempo/internal/build.Branch=HEAD
+      #   -X github.com/grafana/tempo/internal/build.Version=v#{version}
+      #   -X github.com/grafana/tempo/internal/build.BuildUser=#{tap.user}
+      #   -X github.com/grafana/tempo/internal/build.BuildDate=#{time.iso8601}
+      # ]
+      # args = std_go_args(ldflags: ldflags) + %w[-tags=builtinassets,noebpf]
+
+      #GO111MODULE=on CGO_ENABLED=0 go build $(GO_OPT) -o ./bin/$(GOOS)/tempo-$(GOARCH) $(BUILD_INFO) ./cmd/tempo
+      #system "GO111MODULE=on", "go", "build", *args, "-o", bin/"tempo", "./cmd/tempo"
+      system "go", "build","-o", bin/"tempo", "./cmd/tempo"
+    	# GO111MODULE=on CGO_ENABLED=0 go build $(GO_OPT) -o ./bin/$(GOOS)/tempo-query-$(GOARCH) $(BUILD_INFO) ./cmd/tempo-query
+      #system "go", "build", "-o", bin/"tempo-query", "./cmd/tempo-query"
+  	  # GO111MODULE=on CGO_ENABLED=0 go build $(GO_OPT) -o ./bin/$(GOOS)/tempo-cli-$(GOARCH) $(BUILD_INFO) ./cmd/tempo-cli
+      system "go", "build", "-o", bin/"tempo-cli", "./cmd/tempo-cli"
+	    # GO111MODULE=on CGO_ENABLED=0 go build $(GO_OPT) -o ./bin/$(GOOS)/tempo-vulture-$(GOARCH) $(BUILD_INFO) ./cmd/tempo-vulture
+      #system "go", "build", "-o", bin/"tempo-vulture", "./cmd/tempo-vulture"
+
+      (buildpath/"config.tempo").write <<~EOS
+      stream_over_http_enabled: true
+      server:
+        http_listen_port: 3200
+        log_level: info
+
+      query_frontend:
+        search:
+          duration_slo: 5s
+          throughput_bytes_slo: 1.073741824e+09
+        trace_by_id:
+          duration_slo: 5s
+
+      distributor:
+        receivers:                           # this configuration will listen on all ports and protocols that tempo is capable of.
+          jaeger:                            # the receives all come from the OpenTelemetry collector.  more configuration information can
+            protocols:                       # be found there: https://github.com/open-telemetry/opentelemetry-collector/tree/main/receiver
+              thrift_http:                   #
+              grpc:                          # for a production deployment you should only enable the receivers you need!
+              thrift_binary:
+              thrift_compact:
+          zipkin:
+          otlp:
+            protocols:
+              http:
+              grpc:
+          opencensus:
+
+      ingester:
+        max_block_duration: 5m               # cut the headblock when this much time passes. this is being set for demo purposes and should probably be left alone normally
+
+      compactor:
+        compaction:
+          block_retention: 1h                # overall Tempo trace retention. set for demo purposes
+
+      metrics_generator:
+        registry:
+          external_labels:
+            source: tempo
+            cluster: docker-compose
+        storage:
+          path: /opt/homebrew/var/tempo/generator/wal
+          remote_write:
+            - url: http://prometheus:9090/api/v1/write
+              send_exemplars: true
+        traces_storage:
+          path: /opt/homebrew/var/tempo/generator/traces
+
+      storage:
+        trace:
+          backend: local                     # backend configuration to use
+          wal:
+            path: /opt/homebrew/var/tempo/wal             # where to store the wal locally
+          local:
+            path: /opt/homebrew/var/tempo/blocks
+
+      overrides:
+        defaults:
+          metrics_generator:
+            processors: [service-graphs, span-metrics, local-blocks] # enables metrics generator
+      EOS
+
+      (etc/"tempo").install "config.tempo"
+      mkdir_p (var/"tempo")
+    end
+
+    def caveats
+      <<~EOS
+        Tempo uses a configuration file that you can customize before running:
+          #{etc}/tempo/config.tempo
+      EOS
+    end
+
+    service do
+      run [
+        opt_bin/"tempo", "-config.file", etc/"tempo/config.tempo",
+      ]
+      keep_alive true
+      log_path var/"log/tempo.log"
+      error_log_path var/"log/tempo.err.log"
+    end
+
+    test do
+      assert_match version.to_s, shell_output("#{bin}/tempo --version")
+    end
+  end