├── .github └── workflows │ └── go.yml ├── .gitignore ├── LICENSE ├── Makefile ├── README.md ├── go.mod ├── go.sum ├── hook.go ├── hook_test.go ├── options.go └── options_test.go /.github/workflows/go.yml: -------------------------------------------------------------------------------- 1 | name: Go 2 | 3 | on: 4 | push: 5 | branches: [ main ] 6 | pull_request: 7 | branches: [ main ] 8 | 9 | jobs: 10 | 11 | build: 12 | name: Build 13 | runs-on: ubuntu-latest 14 | steps: 15 | 16 | - name: Set up Go 1.x 17 | uses: actions/setup-go@v2 18 | with: 19 | go-version: ^1.14 20 | id: go 21 | 22 | - name: Check out code into the Go module directory 23 | uses: actions/checkout@v2 24 | 25 | - name: Get dependencies 26 | run: | 27 | go get -v -t -d ./... 28 | 29 | - name: Build 30 | run: go build -v . 31 | 32 | - name: Test 33 | run: make test 34 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | .idea/ 2 | .vscode/ 3 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2020 Globo.com 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 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | test: 2 | go test ./... 3 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # go-redis-prometheus 2 | 3 |

4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |

13 | 14 | [go-redis](https://github.com/go-redis/redis) hook that exports Prometheus metrics. 15 | 16 | Also check out our lib https://github.com/globocom/go-redis-opentracing. 17 | 18 | ## Installation 19 | 20 | go get github.com/globocom/go-redis-prometheus 21 | 22 | ## Usage 23 | 24 | ```golang 25 | package main 26 | 27 | import ( 28 | "github.com/go-redis/redis/v8" 29 | "github.com/globocom/go-redis-prometheus" 30 | ) 31 | 32 | func main() { 33 | hook := redisprom.NewHook( 34 | redisprom.WithInstanceName("cache"), 35 | redisprom.WithNamespace("my_namespace"), 36 | redisprom.WithDurationBuckets([]float64{.001, .005, .01}), 37 | ) 38 | 39 | client := redis.NewClient(&redis.Options{ 40 | Addr: "localhost:6379", 41 | Password: "", 42 | }) 43 | client.AddHook(hook) 44 | 45 | // run redis commands... 46 | } 47 | ``` 48 | 49 | ## Exported metrics 50 | 51 | The hook exports the following metrics: 52 | 53 | - Single commands (not pipelined): 54 | - Histogram of commands: `redis_single_commands_bucket{instance="main",command="get"}` 55 | - Counter of errors: `redis_single_errors{instance="main",command="get"}` 56 | - Pipelined commands: 57 | - Counter of commands: `redis_pipelined_commands{instance="main",command="get"}` 58 | - Counter of errors: `redis_pipelined_errors{instance="main",command="get"}` 59 | 60 | ## Note on pipelines 61 | 62 | It isn't possible to measure the duration of individual 63 | pipelined commands, but the duration of the pipeline itself is calculated and 64 | exported as a pseudo-command called "pipeline" under the single command metric. 65 | 66 | ## API stability 67 | 68 | The API is unstable at this point and it might change before `v1.0.0` is released. 69 | -------------------------------------------------------------------------------- /go.mod: -------------------------------------------------------------------------------- 1 | module github.com/globocom/go-redis-prometheus 2 | 3 | go 1.14 4 | 5 | require ( 6 | github.com/go-redis/redis/v8 v8.3.3 7 | github.com/prometheus/client_golang v1.8.0 8 | github.com/prometheus/client_model v0.2.0 9 | github.com/stretchr/testify v1.6.1 10 | ) 11 | -------------------------------------------------------------------------------- /go.sum: -------------------------------------------------------------------------------- 1 | cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= 2 | cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= 3 | github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= 4 | github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0= 5 | github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo= 6 | github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI= 7 | github.com/VividCortex/gohistogram 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github.com/nats-io/nats-server/v2 v2.1.2/go.mod h1:Afk+wRZqkMQs/p45uXdrVLuab3gwv3Z8C4HTBu8GD/k= 179 | github.com/nats-io/nats.go v1.9.1/go.mod h1:ZjDU1L/7fJ09jvUSRVBR2e7+RnLiiIQyqyzEE/Zbp4w= 180 | github.com/nats-io/nkeys v0.1.0/go.mod h1:xpnFELMwJABBLVhffcfd1MZx6VsNRFpEugbxziKVo7w= 181 | github.com/nats-io/nkeys v0.1.3/go.mod h1:xpnFELMwJABBLVhffcfd1MZx6VsNRFpEugbxziKVo7w= 182 | github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c= 183 | github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A= 184 | github.com/oklog/oklog v0.3.2/go.mod h1:FCV+B7mhrz4o+ueLpx+KqkyXRGMWOYEvfiXtdGtbWGs= 185 | github.com/oklog/run v1.0.0/go.mod h1:dlhp/R75TPv97u0XWUtDeV/lRKWPKSdTuV0TZvrmrQA= 186 | github.com/olekukonko/tablewriter v0.0.0-20170122224234-a0225b3f23b5/go.mod h1:vsDQFd/mU46D+Z4whnwzcISnGGzXWMclvtLoiIKAKIo= 187 | github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE= 188 | github.com/onsi/ginkgo 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h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= 294 | golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= 295 | golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto= 296 | golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA= 297 | golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE= 298 | golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU= 299 | golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE= 300 | golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc= 301 | golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc= 302 | golang.org/x/mod 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h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys= 410 | gopkg.in/gcfg.v1 v1.2.3/go.mod h1:yesOnuUOFQAhST5vPY4nbZsb/huCgGGXlipJsBn0b3o= 411 | gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo= 412 | gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw= 413 | gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI= 414 | gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74= 415 | gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 416 | gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 417 | gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 418 | gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 419 | gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 420 | gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo= 421 | gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= 422 | honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= 423 | honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= 424 | honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= 425 | honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= 426 | sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o= 427 | sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU= 428 | -------------------------------------------------------------------------------- /hook.go: -------------------------------------------------------------------------------- 1 | package redisprom 2 | 3 | import ( 4 | "context" 5 | "time" 6 | 7 | "github.com/go-redis/redis/v8" 8 | "github.com/prometheus/client_golang/prometheus" 9 | ) 10 | 11 | type ( 12 | // Hook represents a go-redis hook that exports metrics of commands and pipelines. 13 | // 14 | // The following metrics are exported: 15 | // 16 | // - Single commands (not-pipelined) 17 | // - Histogram of duration 18 | // - Counter of errors 19 | // 20 | // - Pipelined commands 21 | // - Counter of commands 22 | // - Counter of errors 23 | // 24 | // The duration of individual pipelined commands won't be collected, but the overall duration of the 25 | // pipeline will, with a pseudo-command called "pipeline". 26 | Hook struct { 27 | options *Options 28 | singleCommands *prometheus.HistogramVec 29 | pipelinedCommands *prometheus.CounterVec 30 | singleErrors *prometheus.CounterVec 31 | pipelinedErrors *prometheus.CounterVec 32 | } 33 | 34 | startKey struct{} 35 | ) 36 | 37 | var ( 38 | labelNames = []string{"instance", "command"} 39 | ) 40 | 41 | // NewHook creates a new go-redis hook instance and registers Prometheus collectors. 42 | func NewHook(opts ...Option) *Hook { 43 | options := DefaultOptions() 44 | options.Merge(opts...) 45 | 46 | singleCommands := register(prometheus.NewHistogramVec(prometheus.HistogramOpts{ 47 | Namespace: options.Namespace, 48 | Name: "redis_single_commands", 49 | Help: "Histogram of single Redis commands", 50 | Buckets: options.DurationBuckets, 51 | }, labelNames)).(*prometheus.HistogramVec) 52 | 53 | pipelinedCommands := register(prometheus.NewCounterVec(prometheus.CounterOpts{ 54 | Namespace: options.Namespace, 55 | Name: "redis_pipelined_commands", 56 | Help: "Number of pipelined Redis commands", 57 | }, labelNames)).(*prometheus.CounterVec) 58 | 59 | singleErrors := register(prometheus.NewCounterVec(prometheus.CounterOpts{ 60 | Namespace: options.Namespace, 61 | Name: "redis_single_errors", 62 | Help: "Number of single Redis commands that have failed", 63 | }, labelNames)).(*prometheus.CounterVec) 64 | 65 | pipelinedErrors := register(prometheus.NewCounterVec(prometheus.CounterOpts{ 66 | Namespace: options.Namespace, 67 | Name: "redis_pipelined_errors", 68 | Help: "Number of pipelined Redis commands that have failed", 69 | }, labelNames)).(*prometheus.CounterVec) 70 | 71 | return &Hook{ 72 | options: options, 73 | singleCommands: singleCommands, 74 | pipelinedCommands: pipelinedCommands, 75 | singleErrors: singleErrors, 76 | pipelinedErrors: pipelinedErrors, 77 | } 78 | } 79 | 80 | func (hook *Hook) BeforeProcess(ctx context.Context, cmd redis.Cmder) (context.Context, error) { 81 | return context.WithValue(ctx, startKey{}, time.Now()), nil 82 | } 83 | 84 | func (hook *Hook) AfterProcess(ctx context.Context, cmd redis.Cmder) error { 85 | if start, ok := ctx.Value(startKey{}).(time.Time); ok { 86 | duration := time.Since(start).Seconds() 87 | hook.singleCommands.WithLabelValues(hook.options.InstanceName, cmd.Name()).Observe(duration) 88 | } 89 | 90 | if isActualErr(cmd.Err()) { 91 | hook.singleErrors.WithLabelValues(hook.options.InstanceName, cmd.Name()).Inc() 92 | } 93 | 94 | return nil 95 | } 96 | 97 | func (hook *Hook) BeforeProcessPipeline(ctx context.Context, cmds []redis.Cmder) (context.Context, error) { 98 | return context.WithValue(ctx, startKey{}, time.Now()), nil 99 | } 100 | 101 | func (hook *Hook) AfterProcessPipeline(ctx context.Context, cmds []redis.Cmder) error { 102 | if err := hook.AfterProcess(ctx, redis.NewCmd(ctx, "pipeline")); err != nil { 103 | return err 104 | } 105 | 106 | for _, cmd := range cmds { 107 | hook.pipelinedCommands.WithLabelValues(hook.options.InstanceName, cmd.Name()).Inc() 108 | 109 | if isActualErr(cmd.Err()) { 110 | hook.pipelinedErrors.WithLabelValues(hook.options.InstanceName, cmd.Name()).Inc() 111 | } 112 | } 113 | 114 | return nil 115 | } 116 | 117 | func register(collector prometheus.Collector) prometheus.Collector { 118 | err := prometheus.DefaultRegisterer.Register(collector) 119 | if err == nil { 120 | return collector 121 | } 122 | 123 | if arErr, ok := err.(prometheus.AlreadyRegisteredError); ok { 124 | return arErr.ExistingCollector 125 | } 126 | 127 | panic(err) 128 | } 129 | 130 | func isActualErr(err error) bool { 131 | return err != nil && err != redis.Nil 132 | } 133 | -------------------------------------------------------------------------------- /hook_test.go: -------------------------------------------------------------------------------- 1 | package redisprom_test 2 | 3 | import ( 4 | "context" 5 | "errors" 6 | "strings" 7 | "testing" 8 | 9 | "github.com/go-redis/redis/v8" 10 | "github.com/prometheus/client_golang/prometheus" 11 | dto "github.com/prometheus/client_model/go" 12 | "github.com/stretchr/testify/assert" 13 | 14 | "github.com/globocom/go-redis-prometheus" 15 | ) 16 | 17 | func TestHook(t *testing.T) { 18 | assert := assert.New(t) 19 | 20 | t.Run("create a new hook", func(t *testing.T) { 21 | // act 22 | sut := redisprom.NewHook() 23 | 24 | // assert 25 | assert.NotNil(sut) 26 | }) 27 | 28 | t.Run("do not panic if metrics are already registered", func(t *testing.T) { 29 | // arrange 30 | _ = redisprom.NewHook() 31 | 32 | // act/assert 33 | assert.NotPanics(func() { 34 | _ = redisprom.NewHook() 35 | }) 36 | }) 37 | 38 | t.Run("export metrics after a command is processed", func(t *testing.T) { 39 | // arrange 40 | sut := redisprom.NewHook( 41 | redisprom.WithNamespace("namespace1"), 42 | redisprom.WithDurationBuckets([]float64{0.1, 0.2}), 43 | ) 44 | 45 | cmd := redis.NewStringCmd(context.TODO(), "get") 46 | cmd.SetErr(errors.New("some error")) 47 | 48 | // act 49 | ctx, err1 := sut.BeforeProcess(context.TODO(), cmd) 50 | err2 := sut.AfterProcess(ctx, cmd) 51 | 52 | // assert 53 | assert.Nil(err1) 54 | assert.Nil(err2) 55 | 56 | metrics, err := prometheus.DefaultGatherer.Gather() 57 | assert.Nil(err) 58 | 59 | assert.ElementsMatch([]string{ 60 | "namespace1_redis_single_commands", 61 | "namespace1_redis_single_errors", 62 | }, filter(metrics, "namespace1")) 63 | }) 64 | 65 | t.Run("export metrics after a pipeline is processed", func(t *testing.T) { 66 | // arrange 67 | sut := redisprom.NewHook( 68 | redisprom.WithNamespace("namespace2"), 69 | redisprom.WithDurationBuckets([]float64{0.1, 0.2}), 70 | ) 71 | 72 | cmd := redis.NewStringCmd(context.TODO(), "get") 73 | cmd.SetErr(errors.New("some error")) 74 | 75 | // act 76 | ctx, err1 := sut.BeforeProcessPipeline(context.TODO(), []redis.Cmder{cmd}) 77 | err2 := sut.AfterProcessPipeline(ctx, []redis.Cmder{cmd}) 78 | 79 | // assert 80 | assert.Nil(err1) 81 | assert.Nil(err2) 82 | 83 | metrics, err := prometheus.DefaultGatherer.Gather() 84 | assert.Nil(err) 85 | 86 | assert.ElementsMatch([]string{ 87 | "namespace2_redis_single_commands", 88 | "namespace2_redis_pipelined_commands", 89 | "namespace2_redis_pipelined_errors", 90 | }, filter(metrics, "namespace2")) 91 | }) 92 | } 93 | 94 | func filter(metrics []*dto.MetricFamily, namespace string) []string { 95 | var result []string 96 | for _, metric := range metrics { 97 | if strings.HasPrefix(*metric.Name, namespace) { 98 | result = append(result, *metric.Name) 99 | } 100 | } 101 | return result 102 | } 103 | -------------------------------------------------------------------------------- /options.go: -------------------------------------------------------------------------------- 1 | package redisprom 2 | 3 | type ( 4 | // Options represents options to customize the exported metrics. 5 | Options struct { 6 | InstanceName string 7 | Namespace string 8 | DurationBuckets []float64 9 | } 10 | 11 | Option func(*Options) 12 | ) 13 | 14 | // DefaultOptions returns the default options. 15 | func DefaultOptions() *Options { 16 | return &Options{ 17 | InstanceName: "unnamed", 18 | Namespace: "", 19 | DurationBuckets: []float64{.001, .005, .01, .025, .05, .1, .25, .5, 1}, 20 | } 21 | } 22 | 23 | func (options *Options) Merge(opts ...Option) { 24 | for _, opt := range opts { 25 | opt(options) 26 | } 27 | } 28 | 29 | // WithInstanceName sets the name of the Redis instance. 30 | func WithInstanceName(name string) Option { 31 | return func(options *Options) { 32 | options.InstanceName = name 33 | } 34 | } 35 | 36 | // WithNamespace sets the namespace of all metrics. 37 | func WithNamespace(namespace string) Option { 38 | return func(options *Options) { 39 | options.Namespace = namespace 40 | } 41 | } 42 | 43 | // WithDurationBuckets sets the duration buckets of single commands metrics. 44 | func WithDurationBuckets(buckets []float64) Option { 45 | return func(options *Options) { 46 | options.DurationBuckets = buckets 47 | } 48 | } 49 | -------------------------------------------------------------------------------- /options_test.go: -------------------------------------------------------------------------------- 1 | package redisprom_test 2 | 3 | import ( 4 | "testing" 5 | 6 | "github.com/stretchr/testify/assert" 7 | 8 | "github.com/globocom/go-redis-prometheus" 9 | ) 10 | 11 | func TestOptions(t *testing.T) { 12 | assert := assert.New(t) 13 | 14 | t.Run("return default options", func(t *testing.T) { 15 | assert.Equal(&redisprom.Options{ 16 | InstanceName: "unnamed", 17 | Namespace: "", 18 | DurationBuckets: []float64{.001, .005, .01, .025, .05, .1, .25, .5, 1}, 19 | }, redisprom.DefaultOptions()) 20 | }) 21 | 22 | t.Run("merge default options with custom values", func(t *testing.T) { 23 | // arrange 24 | custom1 := func(options *redisprom.Options) { options.InstanceName = "cache" } 25 | custom2 := func(options *redisprom.Options) { options.Namespace = "custom" } 26 | custom3 := func(options *redisprom.Options) { options.DurationBuckets = []float64{0.1} } 27 | 28 | options := redisprom.DefaultOptions() 29 | 30 | // act 31 | options.Merge(custom1, custom2, custom3) 32 | 33 | // assert 34 | assert.Equal(&redisprom.Options{ 35 | InstanceName: "cache", 36 | Namespace: "custom", 37 | DurationBuckets: []float64{0.1}, 38 | }, options) 39 | }) 40 | 41 | t.Run("customize the name of the Redis instance", func(t *testing.T) { 42 | // arrange 43 | options := redisprom.DefaultOptions() 44 | 45 | // act 46 | redisprom.WithInstanceName("cache")(options) 47 | 48 | // assert 49 | assert.Equal("cache", options.InstanceName) 50 | }) 51 | 52 | t.Run("customize metrics namespace", func(t *testing.T) { 53 | // arrange 54 | options := redisprom.DefaultOptions() 55 | 56 | // act 57 | redisprom.WithNamespace("custom")(options) 58 | 59 | // assert 60 | assert.Equal("custom", options.Namespace) 61 | }) 62 | 63 | t.Run("customize metrics duration buckets", func(t *testing.T) { 64 | // arrange 65 | options := redisprom.DefaultOptions() 66 | 67 | // act 68 | redisprom.WithDurationBuckets([]float64{0.01})(options) 69 | 70 | // assert 71 | assert.Equal([]float64{0.01}, options.DurationBuckets) 72 | }) 73 | } 74 | --------------------------------------------------------------------------------