From 369d522fde073ab3a2ee05b4ab630873c471ea32 Mon Sep 17 00:00:00 2001 From: Benjamin Bengfort Date: Fri, 5 Jan 2024 11:35:01 -0600 Subject: [PATCH] Obervability with Prometheus (#14) --- go.mod | 14 ++++- go.sum | 36 +++++++++--- pkg/certs.go | 3 + pkg/o11y/o11y.go | 143 +++++++++++++++++++++++++++++++++++++++++++++++ pkg/server.go | 5 ++ 5 files changed, 191 insertions(+), 10 deletions(-) create mode 100644 pkg/o11y/o11y.go diff --git a/go.mod b/go.mod index 3a2f17d..5934e7c 100644 --- a/go.mod +++ b/go.mod @@ -8,6 +8,7 @@ require ( github.com/gin-gonic/gin v1.9.1 github.com/googleapis/gax-go v1.0.3 github.com/joho/godotenv v1.5.1 + github.com/prometheus/client_golang v1.18.0 github.com/rotationalio/confire v1.0.0 github.com/rs/zerolog v1.31.0 github.com/stretchr/testify v1.8.4 @@ -22,7 +23,9 @@ require ( cloud.google.com/go/compute/metadata v0.2.3 // indirect cloud.google.com/go/iam v1.1.1 // indirect github.com/BurntSushi/toml v1.3.2 // indirect + github.com/beorn7/perks v1.0.1 // indirect github.com/bytedance/sonic v1.9.1 // indirect + github.com/cespare/xxhash/v2 v2.2.0 // indirect github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect github.com/davecgh/go-spew v1.1.1 // indirect @@ -40,13 +43,18 @@ require ( github.com/googleapis/gax-go/v2 v2.12.0 // indirect github.com/json-iterator/go v1.1.12 // indirect github.com/klauspost/cpuid/v2 v2.2.4 // indirect + github.com/kr/text v0.2.0 // indirect github.com/leodido/go-urn v1.2.4 // indirect github.com/mattn/go-colorable v0.1.13 // indirect github.com/mattn/go-isatty v0.0.19 // indirect + github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect github.com/modern-go/reflect2 v1.0.2 // indirect github.com/pelletier/go-toml/v2 v2.0.8 // indirect github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/prometheus/client_model v0.5.0 // indirect + github.com/prometheus/common v0.45.0 // indirect + github.com/prometheus/procfs v0.12.0 // indirect github.com/russross/blackfriday/v2 v2.1.0 // indirect github.com/twitchyliquid64/golang-asm v0.15.1 // indirect github.com/ugorji/go/codec v1.2.11 // indirect @@ -58,9 +66,9 @@ require ( golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3 // indirect golang.org/x/mod v0.8.0 // indirect golang.org/x/net v0.17.0 // indirect - golang.org/x/oauth2 v0.8.0 // indirect - golang.org/x/sync v0.2.0 // indirect - golang.org/x/sys v0.13.0 // indirect + golang.org/x/oauth2 v0.12.0 // indirect + golang.org/x/sync v0.3.0 // indirect + golang.org/x/sys v0.15.0 // indirect golang.org/x/text v0.13.0 // indirect golang.org/x/tools v0.6.0 // indirect google.golang.org/appengine v1.6.7 // indirect diff --git a/go.sum b/go.sum index 527ab89..d0044b7 100644 --- a/go.sum +++ b/go.sum @@ -14,6 +14,8 @@ github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03 github.com/BurntSushi/toml v1.3.2 h1:o7IhLm0Msx3BaB+n3Ag7L8EVlByGnpq14C4YWiu/gL8= github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ= github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY= +github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM= +github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw= github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM= github.com/bytedance/sonic v1.9.1 h1:6iJ6NqdoxCDr6mbY8h18oSO+cShGSMRGCEo7F2h0x8s= github.com/bytedance/sonic v1.9.1/go.mod h1:i736AoUSYt75HyZLoJW9ERYxcy6eaN6h4BZXU064P/U= @@ -21,6 +23,8 @@ github.com/cenkalti/backoff/v4 v4.2.1 h1:y4OZtCnogmCPw98Zjyt5a6+QwPLGkiQsYW5oUqy github.com/cenkalti/backoff/v4 v4.2.1/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE= github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU= github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= +github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44= +github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= github.com/chenzhuoyu/base64x v0.0.0-20211019084208-fb5309c8db06/go.mod h1:DH46F32mSOjUmXrMHnKwZdA8wcEefY7UVqBKYGjpdQY= github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 h1:qSGYFH7+jGhDF8vLC+iwCD4WpbV1EBDSzWkJODFLams= github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311/go.mod h1:b583jCggY9gE99b6G5LEC39OIiVsWj+R97kbl5odCEk= @@ -34,6 +38,7 @@ github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1/go.mod h1:eXthEFrGJvWH github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc= github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w= github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o= +github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E= github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= @@ -112,6 +117,10 @@ github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+o github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg= github.com/klauspost/cpuid/v2 v2.2.4 h1:acbojRNwl3o09bUq+yDCtZFc1aiwaAAxtcn8YkZXnvk= github.com/klauspost/cpuid/v2 v2.2.4/go.mod h1:RVVoqg1df56z8g3pUjL/3lE5UfnlrJX8tyFgg4nqhuY= +github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE= +github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk= +github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY= +github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE= github.com/leodido/go-urn v1.2.4 h1:XlAE/cm/ms7TE/VMVoduSpNBoyc2dOxHs5MZSwAN63Q= github.com/leodido/go-urn v1.2.4/go.mod h1:7ZrI8mTSeBSHl/UaRyKQW1qZeMgak41ANeCNaVckg+4= github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA= @@ -119,6 +128,8 @@ github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovk github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM= github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APPA= github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y= +github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 h1:jWpvCLoY8Z/e3VKvlsiIGKtc+UG6U5vzxaoagmhXfyg= +github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0/go.mod h1:QUyp042oQthUoa9bqDv0ER0wrtXnBruoNd7aNjkbP+k= github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q= github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg= github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q= @@ -129,8 +140,18 @@ github.com/pelletier/go-toml/v2 v2.0.8/go.mod h1:vuYfssBdrU2XDZ9bYydBu6t+6a6PYNc github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0= github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= +github.com/prometheus/client_golang v1.18.0 h1:HzFfmkOzH5Q8L8G+kSJKUx5dtG87sewO+FoDDqP5Tbk= +github.com/prometheus/client_golang v1.18.0/go.mod h1:T+GXkCk5wSJyOqMIzVgvvjFDlkOQntgjkJWKrN5txjA= github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA= +github.com/prometheus/client_model v0.5.0 h1:VQw1hfvPvk3Uv6Qf29VrPF32JB6rtbgI6cYPYQjL0Qw= +github.com/prometheus/client_model v0.5.0/go.mod h1:dTiFglRmd66nLR9Pv9f0mZi7B7fk5Pm3gvsjB5tr+kI= +github.com/prometheus/common v0.45.0 h1:2BGz0eBc2hdMDLnO/8n0jeB3oPrt2D08CekT0lneoxM= +github.com/prometheus/common v0.45.0/go.mod h1:YJmSTw9BoKxJplESWWxlbyttQR4uaEcGyv9MZjVOJsY= +github.com/prometheus/procfs v0.12.0 h1:jluTpSng7V9hY0O2R9DzzJHYb2xULk9VTR1V1R/k6Bo= +github.com/prometheus/procfs v0.12.0/go.mod h1:pcuDEFsWDnvcgNzo4EEweacyhjeA9Zk3cnaOZAZEfOo= github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ= +github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ= +github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog= github.com/rotationalio/confire v1.0.0 h1:Ex1jtwVyvuMhFY0EXfgbMsvd9MPO5V9LvJZ0q740M9k= github.com/rotationalio/confire v1.0.0/go.mod h1:ug7pBDiZZl/4JjXJ2Effmj+L+0T2DBbG+Us1qQcRex0= github.com/rs/xid v1.5.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg= @@ -202,15 +223,15 @@ golang.org/x/net v0.17.0 h1:pVaXccu2ozPjCXewfr1S7xza/zcXTity9cCdXQYSjIM= golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE= golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U= golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw= -golang.org/x/oauth2 v0.8.0 h1:6dkIjl3j3LtZ/O3sTgZTMsLKSftL/B8Zgq4huOIIUu8= -golang.org/x/oauth2 v0.8.0/go.mod h1:yr7u4HXZRm1R1kBWqr/xKNqewf0plRYoB7sla+BCIXE= +golang.org/x/oauth2 v0.12.0 h1:smVPGxink+n1ZI5pkQa8y6fZT0RW0MgCO5bFpepy4B4= +golang.org/x/oauth2 v0.12.0/go.mod h1:A74bZ3aGXgCY0qaIC9Ahg6Lglin4AMAco8cIv9baba4= golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= -golang.org/x/sync v0.2.0 h1:PUR+T4wwASmuSTYdKjYHI5TD22Wy5ogLU5qZCOLxBrI= -golang.org/x/sync v0.2.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= +golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E= +golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y= golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= @@ -225,8 +246,8 @@ golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBc golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= -golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE= -golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc= +golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo= golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8= golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= @@ -290,8 +311,9 @@ google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp0 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc= google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8= google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I= -gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM= gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk= +gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q= gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/pkg/certs.go b/pkg/certs.go index d68b3fd..0f9623e 100644 --- a/pkg/certs.go +++ b/pkg/certs.go @@ -7,6 +7,7 @@ import ( "github.com/gin-gonic/gin" "github.com/trisacrypto/courier/pkg/api/v1" + "github.com/trisacrypto/courier/pkg/o11y" "github.com/trisacrypto/courier/pkg/store" "github.com/trisacrypto/trisa/pkg/trust" ) @@ -78,6 +79,7 @@ func (s *Server) StoreCertificate(c *gin.Context) { } // Return 204 No Content + o11y.Certificates.Inc() c.Status(http.StatusNoContent) } @@ -109,5 +111,6 @@ func (s *Server) StoreCertificatePassword(c *gin.Context) { } // Return 204 No Content + o11y.Passwords.Inc() c.Status(http.StatusNoContent) } diff --git a/pkg/o11y/o11y.go b/pkg/o11y/o11y.go new file mode 100644 index 0000000..048b927 --- /dev/null +++ b/pkg/o11y/o11y.go @@ -0,0 +1,143 @@ +/* +Package metrics provides functions for exporting prometheus metrics. +*/ +package o11y + +import ( + "net/http" + "strconv" + "time" + + "github.com/gin-gonic/gin" + "github.com/prometheus/client_golang/prometheus" + "github.com/prometheus/client_golang/prometheus/promhttp" +) + +func init() { + prometheus.MustRegister( + Passwords, + Certificates, + Requests, + Durations, + RequestSizeBytes, + ReplySizeBytes, + ) +} + +const ( + Namespace = "trisa" + Subsystem = "courier" +) + +const ( + code = "code" + method = "method" + host = "host" + path = "path" +) + +var ( + // Passwords records the number of PKCS12 passwords posted to courier. + Passwords = prometheus.NewCounter(prometheus.CounterOpts{ + Namespace: Namespace, + Subsystem: Subsystem, + Name: "passwords", + Help: "counts the number of PCKS12 passwords successfully posted to courier", + }) + + // Certificates records the number of x509 certs posted to courier. + Certificates = prometheus.NewCounter(prometheus.CounterOpts{ + Namespace: Namespace, + Subsystem: Subsystem, + Name: "certificates", + Help: "counts the number of certificates successfully delivered to courier", + }) + + // Standard HTTP Request Metrics + Requests = prometheus.NewCounterVec(prometheus.CounterOpts{ + Namespace: Namespace, + Subsystem: Subsystem, + Name: "requests", + Help: "the number of HTTP requests processed, partitioned by status code and method", + }, []string{code, method, host, path}) + + Durations = prometheus.NewHistogramVec(prometheus.HistogramOpts{ + Namespace: Namespace, + Subsystem: Subsystem, + Name: "request_duration_seconds", + Help: "request latencies in seconds", + }, []string{code, method, host, path}) + + RequestSizeBytes = prometheus.NewSummaryVec(prometheus.SummaryOpts{ + Namespace: Namespace, + Subsystem: Subsystem, + Name: "request_size_bytes", + Help: "the number of bytes sent in requests", + }, []string{code, method, host, path}) + + ReplySizeBytes = prometheus.NewSummaryVec(prometheus.SummaryOpts{ + Namespace: Namespace, + Subsystem: Subsystem, + Name: "reply_size_bytes", + Help: "the number of bytes sent in response to requests", + }, []string{code, method, host, path}) +) + +// Prometheus returns the collector endpoint to add to the gin router. +func Prometheus() gin.HandlerFunc { + return gin.WrapH(promhttp.Handler()) +} + +// Metrics returns a middleware that can record o11y metrics for all reqeusts. +func Metrics() gin.HandlerFunc { + return func(c *gin.Context) { + start := time.Now() + reqSize := computeApproximateRequestSize(c.Request) + + path := c.Request.URL.Path + if c.Request.URL.RawQuery != "" { + path = path + "?" + c.Request.URL.RawQuery + } + + labels := []string{ + "", c.Request.Method, c.Request.Host, path, + } + + c.Next() + + labels[0] = strconv.Itoa(c.Writer.Status()) + + repSize := float64(c.Writer.Size()) + dur := float64(time.Since(start)) / float64(time.Second) + + Requests.WithLabelValues(labels...).Inc() + Durations.WithLabelValues(labels...).Observe(dur) + RequestSizeBytes.WithLabelValues(labels...).Observe(reqSize) + ReplySizeBytes.WithLabelValues(labels...).Observe(repSize) + } +} + +// From https://github.com/DanielHeckrath/gin-prometheus/blob/master/gin_prometheus.go +func computeApproximateRequestSize(r *http.Request) float64 { + s := 0 + if r.URL != nil { + s = len(r.URL.Path) + } + + s += len(r.Method) + s += len(r.Proto) + for name, values := range r.Header { + s += len(name) + for _, value := range values { + s += len(value) + } + } + s += len(r.Host) + + // N.B. r.Form and r.MultipartForm are assumed to be included in r.URL. + + if r.ContentLength != -1 { + s += int(r.ContentLength) + } + return float64(s) +} diff --git a/pkg/server.go b/pkg/server.go index 394d32a..8aef5a6 100644 --- a/pkg/server.go +++ b/pkg/server.go @@ -16,6 +16,7 @@ import ( "github.com/trisacrypto/courier/pkg/api/v1" "github.com/trisacrypto/courier/pkg/config" "github.com/trisacrypto/courier/pkg/logger" + "github.com/trisacrypto/courier/pkg/o11y" "github.com/trisacrypto/courier/pkg/store" "github.com/trisacrypto/courier/pkg/store/gcloud" "github.com/trisacrypto/courier/pkg/store/local" @@ -192,8 +193,12 @@ func (s *Server) setupRoutes() (err error) { s.router.GET("/livez", s.Healthz) s.router.GET("/readyz", s.Readyz) + // Add prometheus metrics collector endpoint before middleware is added + s.router.GET("/metrics", o11y.Prometheus()) + middlewares := []gin.HandlerFunc{ logger.GinLogger("courier", Version()), + o11y.Metrics(), gin.Recovery(), s.Available(), }