diff --git a/go.mod b/go.mod index 8ff2cac..456dbfd 100644 --- a/go.mod +++ b/go.mod @@ -95,7 +95,7 @@ require ( 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 v2.1.0 // indirect - github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect + github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 github.com/pressly/goose/v3 v3.15.0 // indirect github.com/prometheus/client_model v0.5.0 // indirect github.com/prometheus/common v0.45.0 // indirect diff --git a/go.sum b/go.sum index 37a301c..325ffa7 100644 --- a/go.sum +++ b/go.sum @@ -120,8 +120,6 @@ github.com/cncf/xds/go v0.0.0-20211001041855-01bcc9b48dfe/go.mod h1:eXthEFrGJvWH github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs= github.com/cockroachdb/apd v1.1.0 h1:3LFP3629v+1aKXU5Q37mxmRxX/pIu1nijXydLShEq5I= github.com/cockroachdb/apd v1.1.0/go.mod h1:8Sl8LxpKi29FqWXR16WEFZRNSz3SoPzUzeMeY4+DwBQ= -github.com/cockroachdb/cockroach-go/v2 v2.3.5 h1:Khtm8K6fTTz/ZCWPzU9Ne3aOW9VyAnj4qIPCJgKtwK0= -github.com/cockroachdb/cockroach-go/v2 v2.3.5/go.mod h1:1wNJ45eSXW9AnOc3skntW9ZUZz6gxrQK3cOj3rK+BC8= github.com/cockroachdb/cockroach-go/v2 v2.3.6 h1:Wlv9TzkrG9V7i6u8dEtmXPrBzvfFp+CgJNs696rAajM= github.com/cockroachdb/cockroach-go/v2 v2.3.6/go.mod h1:1wNJ45eSXW9AnOc3skntW9ZUZz6gxrQK3cOj3rK+BC8= github.com/coreos/go-oidc/v3 v3.9.0 h1:0J/ogVOd4y8P0f0xUh8l9t07xRP/d8tccvjHl2dcsSo= @@ -203,8 +201,6 @@ github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+ github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY= github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY= github.com/go-playground/validator/v10 v10.2.0/go.mod h1:uOYAAleCW8F/7oMFd6aG0GOhaH6EGOAJShg8Id5JGkI= -github.com/go-playground/validator/v10 v10.16.0 h1:x+plE831WK4vaKHO/jpgUGsvLKIqRRkz6M78GuJAfGE= -github.com/go-playground/validator/v10 v10.16.0/go.mod h1:9iXMNT7sEkjXb0I+enO7QXmzG6QCsPWY4zveKFVRSyU= github.com/go-playground/validator/v10 v10.17.0 h1:SmVVlfAOtlZncTxRuinDPomC2DkXJ4E5T9gDA0AIH74= github.com/go-playground/validator/v10 v10.17.0/go.mod h1:9iXMNT7sEkjXb0I+enO7QXmzG6QCsPWY4zveKFVRSyU= github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg= @@ -306,8 +302,6 @@ github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm4 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo= github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo= github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo= -github.com/google/uuid v1.5.0 h1:1p67kYwdtXjb0gL0BPiP1Av9wiZPo5A8z2cWkTZ+eyU= -github.com/google/uuid v1.5.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo= github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0= github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo= github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+vpHVxEJEs9eg= @@ -648,12 +642,9 @@ github.com/volatiletech/null/v8 v8.1.2 h1:kiTiX1PpwvuugKwfvUNX/SU/5A2KGZMXfGD0DU github.com/volatiletech/null/v8 v8.1.2/go.mod h1:98DbwNoKEpRrYtGjWFctievIfm4n4MxG0A6EBUcoS5g= github.com/volatiletech/randomize v0.0.1 h1:eE5yajattWqTB2/eN8df4dw+8jwAzBtbdo5sbWC4nMk= github.com/volatiletech/randomize v0.0.1/go.mod h1:GN3U0QYqfZ9FOJ67bzax1cqZ5q2xuj2mXrXBjWaRTlY= -github.com/volatiletech/sqlboiler/v4 v4.15.0 h1:+twm3mA34SaUF6wB9U6QkXxkK8AKkV5EfgMSvcKWeY4= -github.com/volatiletech/sqlboiler/v4 v4.15.0/go.mod h1:s643wqYyCQ7Ak2hMVxH7kTS0+lFPNlj+gHKUIukJ0YA= github.com/volatiletech/sqlboiler/v4 v4.16.1 h1:utSd0n+zoasYAGOwbeGzzLb3p9vdItRyYR6zm20SVP0= github.com/volatiletech/sqlboiler/v4 v4.16.1/go.mod h1:B14BPBGTrJ2X6l7lwnvV/iXgYR48+ozGSlzHI3frl6U= github.com/volatiletech/strmangle v0.0.1/go.mod h1:F6RA6IkB5vq0yTG4GQ0UsbbRcl3ni9P76i+JrTBKFFg= -github.com/volatiletech/strmangle v0.0.5/go.mod h1:ycDvbDkjDvhC0NUU8w3fWwl5JEMTV56vTKXzR3GeR+0= github.com/volatiletech/strmangle v0.0.6 h1:AdOYE3B2ygRDq4rXDij/MMwq6KVK/pWAYxpC7CLrkKQ= github.com/volatiletech/strmangle v0.0.6/go.mod h1:ycDvbDkjDvhC0NUU8w3fWwl5JEMTV56vTKXzR3GeR+0= github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74= @@ -680,16 +671,10 @@ go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw= go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw= go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk= go.opencensus.io v0.23.0/go.mod h1:XItmlyltB5F7CS4xOC1DcqMoFqwtC6OG2xF7mCv7P7E= -go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin v0.45.0 h1:0KYeVr81ogcVRLXVcXFuPQMNZngplnP8MqrE8CqvHeg= -go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin v0.45.0/go.mod h1:ro3eEFOynMu0p59YVUFFbkOeaPREbqc5yDR2HnGpFc0= -go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin v0.46.1 h1:mMv2jG58h6ZI5t5S9QCVGdzCmAsTakMa3oxVgpSD44g= -go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin v0.46.1/go.mod h1:oqRuNKG0upTaDPbLVCG8AD0G2ETrfDtmh7jViy7ox6M= go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin v0.48.0 h1:9fRyGkm/rbLuNNJsk9YY2c7Tpjf9tRjm1BAa48L3ypU= go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin v0.48.0/go.mod h1:7eRxLMX2ua+Pwtw1lkj8L0i0aykVQ/CafXhARYY056k= -go.opentelemetry.io/contrib/propagators/b3 v1.20.0 h1:Yty9Vs4F3D6/liF1o6FNt0PvN85h/BJJ6DQKJ3nrcM0= -go.opentelemetry.io/contrib/propagators/b3 v1.20.0/go.mod h1:On4VgbkqYL18kbJlWsa18+cMNe6rYpBnPi1ARI/BrsU= -go.opentelemetry.io/otel v1.21.0 h1:hzLeKBZEL7Okw2mGzZ0cc4k/A7Fta0uoPgaJCr8fsFc= -go.opentelemetry.io/otel v1.21.0/go.mod h1:QZzNPQPm1zLX4gZK4cMi+71eaorMSGT3A4znnUvNNEo= +go.opentelemetry.io/contrib/propagators/b3 v1.23.0 h1:aaIGWc5JdfRGpCafLRxMJbD65MfTa206AwSKkvGS0Hg= +go.opentelemetry.io/contrib/propagators/b3 v1.23.0/go.mod h1:Gyz7V7XghvwTq+mIhLFlTgcc03UDroOg8vezs4NLhwU= go.opentelemetry.io/otel v1.23.1 h1:Za4UzOqJYS+MUczKI320AtqZHZb7EqxO00jAHE0jmQY= go.opentelemetry.io/otel v1.23.1/go.mod h1:Td0134eafDLcTS4y+zQ26GE8u3dEuRBiBCTUIRHaikA= go.opentelemetry.io/otel/exporters/jaeger v1.17.0 h1:D7UpUy2Xc2wsi1Ras6V40q806WM07rqoCWzXu7Sqy+4= @@ -702,16 +687,12 @@ go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.21.0 h1:digkE go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.21.0/go.mod h1:/OpE/y70qVkndM0TrxT4KBoN3RsFZP0QaofcfYrj76I= go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.21.0 h1:VhlEQAPp9R1ktYfrPk5SOryw1e9LDDTZCbIPFrho0ec= go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.21.0/go.mod h1:kB3ufRbfU+CQ4MlUcqtW8Z7YEOBeK2DJ6CmR5rYYF3E= -go.opentelemetry.io/otel/metric v1.21.0 h1:tlYWfeo+Bocx5kLEloTjbcDwBuELRrIFxwdQ36PlJu4= -go.opentelemetry.io/otel/metric v1.21.0/go.mod h1:o1p3CA8nNHW8j5yuQLdc1eeqEaPfzug24uvsyIEJRWM= go.opentelemetry.io/otel/metric v1.23.1 h1:PQJmqJ9u2QaJLBOELl1cxIdPcpbwzbkjfEyelTl2rlo= go.opentelemetry.io/otel/metric v1.23.1/go.mod h1:mpG2QPlAfnK8yNhNJAxDZruU9Y1/HubbC+KyH8FaCWI= go.opentelemetry.io/otel/sdk v1.21.0 h1:FTt8qirL1EysG6sTQRZ5TokkU8d0ugCj8htOgThZXQ8= go.opentelemetry.io/otel/sdk v1.21.0/go.mod h1:Nna6Yv7PWTdgJHVRD9hIYywQBRx7pbox6nwBnZIxl/E= go.opentelemetry.io/otel/sdk/metric v0.39.0 h1:Kun8i1eYf48kHH83RucG93ffz0zGV1sh46FAScOTuDI= go.opentelemetry.io/otel/sdk/metric v0.39.0/go.mod h1:piDIRgjcK7u0HCL5pCA4e74qpK/jk3NiUoAHATVAmiI= -go.opentelemetry.io/otel/trace v1.21.0 h1:WD9i5gzvoUPuXIXH24ZNBudiarZDKuekPqi/E8fpfLc= -go.opentelemetry.io/otel/trace v1.21.0/go.mod h1:LGbsEB0f9LGjN+OZaQQ26sohbOmiMR+BaslueVtS/qQ= go.opentelemetry.io/otel/trace v1.23.1 h1:4LrmmEd8AU2rFvU1zegmvqW7+kWarxtNOPyeL6HmYY8= go.opentelemetry.io/otel/trace v1.23.1/go.mod h1:4IpnpJFwr1mo/6HL8XIPJaE9y0+u1KcVmuW7dwFSVrI= go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI= @@ -764,8 +745,6 @@ golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4/go.mod h1:IxCIyHEi3zRg3s0 golang.org/x/crypto v0.0.0-20220511200225-c6db032c6c88/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4= golang.org/x/crypto v0.0.0-20220826181053-bd7e27e6170d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4= golang.org/x/crypto v0.6.0/go.mod h1:OFC/31mSvZgRz0V1QTNCzfAI1aIRzbiufJtkMIlEp58= -golang.org/x/crypto v0.17.0 h1:r8bRNjWL3GshPW3gkd+RpvzWrZAwPS49OmTGZ/uhM4k= -golang.org/x/crypto v0.17.0/go.mod h1:gCAAfMLgwOJRpTjQ2zCCt2OcSfYMTeZVSRtQlPC7Nq4= golang.org/x/crypto v0.19.0 h1:ENy+Az/9Y1vSrlrvBSyna3PITt4tiZLf7sgCjZBX7Wo= golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU= golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA= @@ -859,8 +838,6 @@ golang.org/x/net v0.0.0-20220425223048-2871e0cb64e4/go.mod h1:CfG3xpIq0wQ8r1q4Su golang.org/x/net v0.0.0-20220520000938-2e3eb7b945c2/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk= golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c= golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs= -golang.org/x/net v0.19.0 h1:zTwKpTd2XuCqf8huc7Fo2iSy+4RHPd10s4KzeTnVr1c= -golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U= golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4= golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44= golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U= @@ -883,8 +860,6 @@ golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8/go.mod h1:KelEdhl1UZF7XfJ golang.org/x/oauth2 v0.0.0-20220223155221-ee480838109b/go.mod h1:DAh4E804XQdzx2j+YRIaUnCqCV2RuMz24cGBJ5QYIrc= golang.org/x/oauth2 v0.0.0-20220309155454-6242fa91716a/go.mod h1:DAh4E804XQdzx2j+YRIaUnCqCV2RuMz24cGBJ5QYIrc= golang.org/x/oauth2 v0.0.0-20220411215720-9780585627b5/go.mod h1:DAh4E804XQdzx2j+YRIaUnCqCV2RuMz24cGBJ5QYIrc= -golang.org/x/oauth2 v0.15.0 h1:s8pnnxNVzjWyrvYdFUQq5llS1PX2zhPXmccZv99h7uQ= -golang.org/x/oauth2 v0.15.0/go.mod h1:q48ptWNTY5XWf+JNten23lcvHpLJ0ZSxF5ttTHKVCAM= golang.org/x/oauth2 v0.17.0 h1:6m3ZPmLEFdVxKKWnKq4VqZ60gutO35zm+zrAHVmHyDQ= golang.org/x/oauth2 v0.17.0/go.mod h1:OzPDGQiuQMguemayvdylqddI7qcD9lnSDb+1FiwQ5HA= golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= @@ -988,8 +963,6 @@ golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBc golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.6.0/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/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y= golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw= @@ -1266,8 +1239,6 @@ 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 v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc= google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I= -google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8= -google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I= google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I= google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos= gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw= diff --git a/pkg/api/v1/router_instance_metadata.go b/pkg/api/v1/router_instance_metadata.go index 9d8ecdd..2320358 100644 --- a/pkg/api/v1/router_instance_metadata.go +++ b/pkg/api/v1/router_instance_metadata.go @@ -5,12 +5,16 @@ import ( "database/sql" "encoding/json" "errors" + "fmt" + "log" "math/rand" "net/http" + "reflect" "strconv" "time" "github.com/gin-gonic/gin" + "github.com/pmezard/go-difflib/difflib" "github.com/spf13/viper" "github.com/volatiletech/null/v8" "github.com/volatiletech/sqlboiler/v4/types" @@ -267,6 +271,9 @@ func (r *Router) instanceMetadataSet(c *gin.Context) { Metadata: types.JSON(params.Metadata), } + // Log the difference between the metadata we're about to upsert and the metadata we have in the database + instanceMetadataLogDiffs(r, c, newInstanceMetadata) + err := upserter.UpsertMetadata(c, r.DB, r.Logger, params.ID, params.getIPAddresses(), newInstanceMetadata) if err != nil { dbErrorResponse(r.Logger, c, err) @@ -275,6 +282,69 @@ func (r *Router) instanceMetadataSet(c *gin.Context) { c.Status(http.StatusOK) } +// Log the difference between the metadata we're about to upsert and the metadata we have in the database +func instanceMetadataLogDiffs(r *Router, c *gin.Context, newInstanceMetadata *models.InstanceMetadatum) { + instanceID := newInstanceMetadata.ID + + existingMetadata, err := models.FindInstanceMetadatum(c.Request.Context(), r.DB, instanceID) + if err != nil && !errors.Is(err, sql.ErrNoRows) { + r.Logger.Sugar().Info("Upsert metadata diff for instance ", instanceID, ": this is the first metadata for this instance (sql.ErrNoRows)") + return + } + + if existingMetadata == nil { + r.Logger.Sugar().Info("Upsert metadata diff for instance ", instanceID, ": this is the first metadata for this instance") + return + } + + if existingMetadata != nil { + r.Logger.Sugar().Info("Upsert metadata diff for instance ", instanceID, ": ", diffJSON(r, instanceID, existingMetadata.Metadata, newInstanceMetadata.Metadata)) + } +} + +// diffJSON returns a string representation of the difference between two JSON objects +func diffJSON(r *Router, instanceID string, existingJSON, newJSON types.JSON) string { + var existingMap, newMap map[string]interface{} + + err := existingJSON.Unmarshal(&existingMap) + if err != nil { + return "Error unmarshalling existing JSON" + } + + r.Logger.Sugar().Info("Existing metadata for instance ", instanceID, "has ", len(existingMap), " keys") + + err = newJSON.Unmarshal(&newMap) + if err != nil { + return "Error unmarshalling new JSON" + } + + r.Logger.Sugar().Info("New metadata for instance ", instanceID, "has ", len(newMap), " keys") + + return diffMap(existingMap, newMap) +} + +// diffMap returns a string representation of the difference between two maps +func diffMap(existingMap, newMap map[string]interface{}) string { + var diff difflib.UnifiedDiff + + if reflect.DeepEqual(existingMap, newMap) { + return "No difference" + } + + // Generate a unified diff between the two maps + diff = difflib.UnifiedDiff{ + A: difflib.SplitLines(fmt.Sprintf("%#v", existingMap)), + B: difflib.SplitLines(fmt.Sprintf("%#v", newMap)), + } + + diffText, err := difflib.GetUnifiedDiffString(diff) + if err != nil { + log.Fatal(err) + } + + return diffText +} + func (r *Router) instanceUserdataSet(c *gin.Context) { params := UpsertUserdataRequest{}