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Obervability with Prometheus #14

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Jan 5, 2024
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Obervability with Prometheus #14

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14 changes: 11 additions & 3 deletions go.mod
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Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand All @@ -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
Expand All @@ -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
Expand All @@ -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
Expand Down
36 changes: 29 additions & 7 deletions go.sum
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Original file line number Diff line number Diff line change
Expand Up @@ -14,13 +14,17 @@ 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=
github.com/cenkalti/backoff/v4 v4.2.1 h1:y4OZtCnogmCPw98Zjyt5a6+QwPLGkiQsYW5oUqylYbM=
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=
Expand All @@ -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=
Expand Down Expand Up @@ -112,13 +117,19 @@ 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=
github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
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=
Expand All @@ -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=
Expand Down Expand Up @@ -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=
Expand All @@ -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=
Expand Down Expand Up @@ -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=
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3 changes: 3 additions & 0 deletions pkg/certs.go
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Original file line number Diff line number Diff line change
Expand Up @@ -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"
)
Expand Down Expand Up @@ -78,6 +79,7 @@ func (s *Server) StoreCertificate(c *gin.Context) {
}

// Return 204 No Content
o11y.Certificates.Inc()
c.Status(http.StatusNoContent)
}

Expand Down Expand Up @@ -109,5 +111,6 @@ func (s *Server) StoreCertificatePassword(c *gin.Context) {
}

// Return 204 No Content
o11y.Passwords.Inc()
c.Status(http.StatusNoContent)
}
143 changes: 143 additions & 0 deletions pkg/o11y/o11y.go
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@@ -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)
}
5 changes: 5 additions & 0 deletions pkg/server.go
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Original file line number Diff line number Diff line change
Expand Up @@ -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"
Expand Down Expand Up @@ -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(),
}
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