add prometheus exports for redis

go.mod

@@ -3,6 +3,7 @@ module backfeed
 go 1.18
 
 require (
+	github.com/globocom/go-redis-prometheus v0.4.0
 	github.com/go-redis/redis/v8 v8.11.4
 	github.com/gorilla/mux v1.8.0
 	github.com/prometheus/client_golang v1.12.1

go.sum

@@ -33,15 +33,32 @@ cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9
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@@ -104,6 +150,7 @@ github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw
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@@ -113,6 +160,7 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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@@ -128,23 +176,59 @@ github.com/google/pprof v0.0.0-20200229191704-1ebb73c60ed3/go.mod h1:ZgVRPoUq/hf
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@@ -258,8 +436,12 @@ golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
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@@ -270,6 +452,7 @@ golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLL
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@@ -285,6 +468,7 @@ golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/
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@@ -305,10 +489,14 @@ golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJ
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 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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@@ -318,11 +506,13 @@ golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/sys v0.0.0-20190904154756-749cb33beabd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191001151750-bb3f8db39f24/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200113162924-86b910548bc1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -336,11 +526,13 @@ golang.org/x/sys v0.0.0-20200331124033-c3d80250170d/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200501052902-10377860bb8e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200511232937-7e40ca221e25/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210112080510-489259a85091/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -356,15 +548,19 @@ golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
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 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
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 golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
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@@ -374,6 +570,8 @@ golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgw
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@@ -381,6 +579,7 @@ golang.org/x/tools v0.0.0-20191125144606-a911d9008d1f/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.0.0-20191130070609-6e064ea0cf2d/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191216173652-a0e659d51361/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20191227053925-7b8e75db28f4/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
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 golang.org/x/tools v0.0.0-20200117161641-43d50277825c/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200122220014-bf1340f18c4a/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
@@ -405,6 +604,7 @@ golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/api v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
 google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
 google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
 google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
@@ -422,6 +622,7 @@ google.golang.org/api v0.28.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0M
 google.golang.org/api v0.29.0/go.mod h1:Lcubydp8VUV7KeIHD9z2Bys/sm/vGKnG1UHuDBSrHWM=
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
+google.golang.org/appengine v1.2.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
@@ -432,6 +633,7 @@ google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRn
 google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190530194941-fb225487d101/go.mod h1:z3L6/3dTEVtUr6QSP8miRzeRqwQOioJ9I66odjN4I7s=
 google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
@@ -456,10 +658,15 @@ google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7Fc
 google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+google.golang.org/grpc v1.20.0/go.mod h1:chYK+tFQF0nDUGJgXMSgLCQk3phJEuONr2DCgLDdAQM=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
+google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
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+google.golang.org/grpc v1.22.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
+google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
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 google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
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@@ -485,10 +692,15 @@ gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLks
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/gcfg.v1 v1.2.3/go.mod h1:yesOnuUOFQAhST5vPY4nbZsb/huCgGGXlipJsBn0b3o=
+gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
+gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
@@ -496,6 +708,9 @@ gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
@@ -506,3 +721,5 @@ honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
+sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
+sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=

main.go

@@ -17,6 +17,7 @@ import (
 	"syscall"
 	"time"
 
+	redisprom "github.com/globocom/go-redis-prometheus"
 	"github.com/go-redis/redis/v8"
 	"github.com/gorilla/mux"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
@@ -470,6 +471,7 @@ func (that *GlobalBackfeedManager) HandleHealth(res http.ResponseWriter, req *ht
 		return
 	}
 	err = that.BackfeedRedis.ForEachShard(req.Context(), func(ctx context.Context, client *redis.Client) error {
+		client.ClientGetName(ctx)
 		return client.Ping(ctx).Err()
 	})
 	if err != nil {
@@ -517,12 +519,29 @@ func main() {
 		ReadTimeout: 15 * time.Minute,
 	})
 
+	legacyRedisMetricsHook := redisprom.NewHook(
+		redisprom.WithInstanceName("legacy"),
+	)
+	legacyRedisClient.AddHook(legacyRedisMetricsHook)
+	backfeedRedisMetricsHook := redisprom.NewHook(
+		redisprom.WithInstanceName("backfeed"),
+	)
+	backfeedRedisClient.AddHook(backfeedRedisMetricsHook)
+	trackerRedisMetricsHook := redisprom.NewHook(
+		redisprom.WithInstanceName("tracker"),
+	)
+	trackerRedisClient.AddHook(trackerRedisMetricsHook)
+
 	if err := trackerRedisClient.Ping(context.Background()).Err(); err != nil {
 		log.Panicf("unable to ping tracker redis: %s", err)
 	}
 	if err := backfeedRedisClient.Ping(context.Background()).Err(); err != nil {
 		log.Panicf("unable to ping backfeed redis: %s", err)
 	}
+	err = backfeedRedisClient.ForEachShard(context.Background(), func(ctx context.Context, client *redis.Client) error {
+		client.ClientGetName(ctx)
+		return client.Ping(ctx).Err()
+	})
 	if err := legacyRedisClient.Ping(context.Background()).Err(); err != nil {
 		log.Panicf("unable to ping legacy redis: %s", err)
 	}

vendor/github.com/globocom/go-redis-prometheus/.gitignore

@@ -0,0 +1,2 @@
+.idea/
+.vscode/

vendor/github.com/globocom/go-redis-prometheus/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Globo.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/globocom/go-redis-prometheus/Makefile

@@ -0,0 +1,2 @@
+test:
+	go test ./...

vendor/github.com/globocom/go-redis-prometheus/README.md

@@ -0,0 +1,62 @@
+# go-redis-prometheus
+
+<p>
+  <img src="https://img.shields.io/github/workflow/status/globocom/go-redis-prometheus/Go?style=flat-square">
+  <a href="https://github.com/globocom/go-redis-prometheus/blob/master/LICENSE">
+    <img src="https://img.shields.io/github/license/globocom/go-buffer?color=blue&style=flat-square">
+  </a>
+  <img src="https://img.shields.io/github/go-mod/go-version/globocom/go-redis-prometheus?style=flat-square">
+  <a href="https://pkg.go.dev/github.com/globocom/go-redis-prometheus">
+    <img src="https://img.shields.io/badge/Go-reference-blue?style=flat-square">
+  </a>
+</p>
+
+[go-redis](https://github.com/go-redis/redis) hook that exports Prometheus metrics.
+
+## Installation
+
+    go get github.com/globocom/go-redis-prometheus
+
+## Usage
+
+```golang
+package main
+
+import (
+    "github.com/go-redis/redis/v8"
+    "github.com/globocom/go-redis-prometheus"
+)
+
+func main() {
+    hook := redisprom.NewHook(
+        redisprom.WithInstanceName("cache"),
+        redisprom.WithNamespace("my_namespace"),
+        redisprom.WithDurationBuckets([]float64{.001, .005, .01}),
+    )
+
+    client := redis.NewClient(&redis.Options{
+        Addr:     "localhost:6379",
+        Password: "",
+    })
+    client.AddHook(hook)
+
+    // run redis commands...
+}
+```
+
+## Exported metrics
+
+The hook exports the following metrics:
+
+- Single commands (not pipelined):
+  - Histogram of commands: `redis_single_commands_bucket{instance="main",command="get"}`
+  - Counter of errors: `redis_single_errors{instance="main",command="get"}`
+ - Pipelined commands:
+   - Counter of commands: `redis_pipelined_commands{instance="main",command="get"}`
+   - Counter of errors: `redis_pipelined_errors{instance="main",command="get"}`
+
+## Note on pipelines
+
+It isn't possible to measure the duration of individual
+pipelined commands, but the duration of the pipeline itself is calculated and 
+exported as a pseudo-command called "pipeline" under the single command metric.

vendor/github.com/globocom/go-redis-prometheus/hook.go

@@ -0,0 +1,132 @@
+package redisprom
+
+import (
+	"context"
+	"time"
+
+	"github.com/go-redis/redis/v8"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type (
+	// Hook represents a go-redis hook that exports metrics of commands and pipelines.
+	//
+	// The following metrics are exported:
+	//
+	// - Single commands (not-pipelined)
+	//   - Histogram of duration
+	//   - Counter of errors
+	//
+	// - Pipelined commands
+	//   - Counter of commands
+	//   - Counter of errors
+	//
+	// The duration of individual pipelined commands won't be collected, but the overall duration of the
+	// pipeline will, with a pseudo-command called "pipeline".
+	Hook struct {
+		options           *Options
+		singleCommands    *prometheus.HistogramVec
+		pipelinedCommands *prometheus.CounterVec
+		singleErrors      *prometheus.CounterVec
+		pipelinedErrors   *prometheus.CounterVec
+	}
+
+	startKey struct{}
+)
+
+var (
+	labelNames = []string{"instance", "command"}
+)
+
+// NewHook creates a new go-redis hook instance and registers Prometheus collectors.
+func NewHook(opts ...Option) *Hook {
+	options := DefaultOptions()
+	options.Merge(opts...)
+
+	singleCommands := register(prometheus.NewHistogramVec(prometheus.HistogramOpts{
+		Namespace: options.Namespace,
+		Name:      "redis_single_commands",
+		Help:      "Histogram of single Redis commands",
+		Buckets:   options.DurationBuckets,
+	}, labelNames)).(*prometheus.HistogramVec)
+
+	pipelinedCommands := register(prometheus.NewCounterVec(prometheus.CounterOpts{
+		Namespace: options.Namespace,
+		Name:      "redis_pipelined_commands",
+		Help:      "Number of pipelined Redis commands",
+	}, labelNames)).(*prometheus.CounterVec)
+
+	singleErrors := register(prometheus.NewCounterVec(prometheus.CounterOpts{
+		Namespace: options.Namespace,
+		Name:      "redis_single_errors",
+		Help:      "Number of single Redis commands that have failed",
+	}, labelNames)).(*prometheus.CounterVec)
+
+	pipelinedErrors := register(prometheus.NewCounterVec(prometheus.CounterOpts{
+		Namespace: options.Namespace,
+		Name:      "redis_pipelined_errors",
+		Help:      "Number of pipelined Redis commands that have failed",
+	}, labelNames)).(*prometheus.CounterVec)
+
+	return &Hook{
+		options:           options,
+		singleCommands:    singleCommands,
+		pipelinedCommands: pipelinedCommands,
+		singleErrors:      singleErrors,
+		pipelinedErrors:   pipelinedErrors,
+	}
+}
+
+func (hook *Hook) BeforeProcess(ctx context.Context, cmd redis.Cmder) (context.Context, error) {
+	return context.WithValue(ctx, startKey{}, time.Now()), nil
+}
+
+func (hook *Hook) AfterProcess(ctx context.Context, cmd redis.Cmder) error {
+	if start, ok := ctx.Value(startKey{}).(time.Time); ok {
+		duration := time.Since(start).Seconds()
+		hook.singleCommands.WithLabelValues(hook.options.InstanceName, cmd.Name()).Observe(duration)
+	}
+
+	if isActualErr(cmd.Err()) {
+		hook.singleErrors.WithLabelValues(hook.options.InstanceName, cmd.Name()).Inc()
+	}
+
+	return nil
+}
+
+func (hook *Hook) BeforeProcessPipeline(ctx context.Context, cmds []redis.Cmder) (context.Context, error) {
+	return context.WithValue(ctx, startKey{}, time.Now()), nil
+}
+
+func (hook *Hook) AfterProcessPipeline(ctx context.Context, cmds []redis.Cmder) error {
+	if err := hook.AfterProcess(ctx, redis.NewCmd(ctx, "pipeline")); err != nil {
+		return err
+	}
+
+	for _, cmd := range cmds {
+		hook.pipelinedCommands.WithLabelValues(hook.options.InstanceName, cmd.Name()).Inc()
+
+		if isActualErr(cmd.Err()) {
+			hook.pipelinedErrors.WithLabelValues(hook.options.InstanceName, cmd.Name()).Inc()
+		}
+	}
+
+	return nil
+}
+
+func register(collector prometheus.Collector) prometheus.Collector {
+	err := prometheus.DefaultRegisterer.Register(collector)
+	if err == nil {
+		return collector
+	}
+
+	if arErr, ok := err.(prometheus.AlreadyRegisteredError); ok {
+		return arErr.ExistingCollector
+	}
+
+	panic(err)
+}
+
+func isActualErr(err error) bool {
+	return err != nil && err != redis.Nil
+}

vendor/github.com/globocom/go-redis-prometheus/options.go

@@ -0,0 +1,48 @@
+package redisprom
+
+type (
+	// Options represents options to customize the exported metrics.
+	Options struct {
+		InstanceName    string
+		Namespace       string
+		DurationBuckets []float64
+	}
+
+	Option func(*Options)
+)
+
+// DefaultOptions returns the default options.
+func DefaultOptions() *Options {
+	return &Options{
+		InstanceName:    "unnamed",
+		Namespace:       "",
+		DurationBuckets: []float64{.001, .005, .01, .025, .05, .1, .25, .5, 1},
+	}
+}
+
+func (options *Options) Merge(opts ...Option) {
+	for _, opt := range opts {
+		opt(options)
+	}
+}
+
+// WithInstanceName sets the name of the Redis instance.
+func WithInstanceName(name string) Option {
+	return func(options *Options) {
+		options.InstanceName = name
+	}
+}
+
+// WithNamespace sets the namespace of all metrics.
+func WithNamespace(namespace string) Option {
+	return func(options *Options) {
+		options.Namespace = namespace
+	}
+}
+
+// WithDurationBuckets sets the duration buckets of single commands metrics.
+func WithDurationBuckets(buckets []float64) Option {
+	return func(options *Options) {
+		options.DurationBuckets = buckets
+	}
+}

vendor/modules.txt

@@ -7,6 +7,9 @@ github.com/cespare/xxhash/v2
 # github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f
 ## explicit
 github.com/dgryski/go-rendezvous
+# github.com/globocom/go-redis-prometheus v0.4.0
+## explicit; go 1.14
+github.com/globocom/go-redis-prometheus
 # github.com/go-redis/redis/v8 v8.11.4
 ## explicit; go 1.13
 github.com/go-redis/redis/v8