From ac086496e65f46f40e2b1c7af75d515a77a4796d Mon Sep 17 00:00:00 2001 From: Matt Dowdell Date: Sat, 28 Mar 2026 12:46:17 +0000 Subject: [PATCH] feat: Add k8smount provider Add a provider for [Kubernetes volume mounts]. This allows a process running in a Pod to read in configuration form ConfigMaps and Secrets, and watch for updates thereafter. This is intended as an upgrade to reading Pod configuration in as environment variables, allowing values to be updated in place instead of requiring a Pod restart. It is not intended to replace reading of structured data in a ConfigMap or Secret, such as JSON or YAML. In such cases, it is recommended to use the existing file provider. The following features are provided in this change: - Support for loading configuration from the symlink structure used by volume mounts of ConfigMap and Secrets in Kubernetes Pods. - Support for watching for configuration changes on said volume mounts. This feature is based on the existing file provider. - Support for transforming keys and values after the initial load. This feature is based on the existing environment variable provider. This change also upgrades the Go version in the workspace to 1.25. The provider uses [`os.Root`] to prevent access to files outside the intended mount. Go 1.25 is needed to use [`io/fs.ReadLinkFS`] which extends `os.Root` with methods that are useful for working with symlink-based structure of volume mounts. Without these methods, we'd be forced to use the equivalent functions in `os`, and so abandon the protection provided by `os.Root`. [Kubernetes volume mounts]: https://kubernetes.io/docs/concepts/storage/volumes/ [`os.Root`]: https://pkg.go.dev/os#Root [`io/fs.ReadLinkFS`]: https://pkg.go.dev/io/fs#ReadLinkFS --- examples/read-k8smount/main.go | 49 ++++ go.work | 5 +- go.work.sum | 72 ++++- .../database_host | 1 + .../database_port | 1 + mock/mount/..data | 1 + mock/mount/database_host | 1 + mock/mount/database_port | 1 + providers/k8smount/go.mod | 20 ++ providers/k8smount/go.sum | 24 ++ providers/k8smount/helper_test.go | 105 +++++++ providers/k8smount/provider.go | 246 ++++++++++++++++ providers/k8smount/provider_test.go | 265 ++++++++++++++++++ 13 files changed, 785 insertions(+), 6 deletions(-) create mode 100644 examples/read-k8smount/main.go create mode 100644 mock/mount/..2006_01_02_15_04_05.0000000000/database_host create mode 100644 mock/mount/..2006_01_02_15_04_05.0000000000/database_port create mode 120000 mock/mount/..data create mode 120000 mock/mount/database_host create mode 120000 mock/mount/database_port create mode 100644 providers/k8smount/go.mod create mode 100644 providers/k8smount/go.sum create mode 100644 providers/k8smount/helper_test.go create mode 100644 providers/k8smount/provider.go create mode 100644 providers/k8smount/provider_test.go diff --git a/examples/read-k8smount/main.go b/examples/read-k8smount/main.go new file mode 100644 index 0000000..7dc34a3 --- /dev/null +++ b/examples/read-k8smount/main.go @@ -0,0 +1,49 @@ +package main + +import ( + "context" + "fmt" + "log" + "os" + "os/signal" + "strings" + + "github.com/knadh/koanf/providers/k8smount" + "github.com/knadh/koanf/v2" +) + +var k = koanf.New(".") + +func main() { + p := k8smount.Provider("mock/mount", ".", k8smount.Opt{ + TransformFunc: func(k, v string) (string, any) { + return strings.ToLower(strings.ReplaceAll(k, "_", ".")), strings.TrimSpace(v) + }, + }) + + if err := k.Load(p, nil); err != nil { + log.Fatalf("error loading config: %v", err) + } + + fmt.Println("database's host is = ", k.String("database.host")) + fmt.Println("database's port is = ", k.Int("database.port")) + + ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt) + defer stop() + + if err := p.Watch(func(_ any, err error) { + if err != nil { + log.Printf("watch error: %v", err) + return + } + + log.Println("config changed. Reloading ...") + k.Load(p, nil) + k.Print() + }); err != nil { + log.Fatalf("error watching config: %v", err) + } + + log.Println("waiting forever. Try making a change under mock/mount/ to live reload") + <-ctx.Done() +} diff --git a/go.work b/go.work index e5aa5de..f9e7541 100644 --- a/go.work +++ b/go.work @@ -1,6 +1,6 @@ -go 1.24.4 +go 1.25 -toolchain go1.24.5 +toolchain go1.25 use ( . @@ -26,6 +26,7 @@ use ( ./providers/etcd ./providers/file ./providers/fs + ./providers/k8smount ./providers/nats ./providers/parameterstore ./providers/posflag diff --git a/go.work.sum b/go.work.sum index f770a0f..7655d33 100644 --- a/go.work.sum +++ b/go.work.sum @@ -1,5 +1,7 @@ cel.dev/expr v0.19.1 h1:NciYrtDRIR0lNCnH1LFJegdjspNx9fI59O7TWcua/W4= cel.dev/expr v0.19.1/go.mod h1:MrpN08Q+lEBs+bGYdLxxHkZoUSsCp0nSKTs0nTymJgw= +cel.dev/expr v0.25.1 h1:1KrZg61W6TWSxuNZ37Xy49ps13NUovb66QLprthtwi4= +cel.dev/expr v0.25.1/go.mod h1:hrXvqGP6G6gyx8UAHSHJ5RGk//1Oj5nXQ2NI02Nrsg4= cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= cloud.google.com/go v0.110.0/go.mod h1:SJnCLqQ0FCFGSZMUNUf84MV3Aia54kn7pi8st7tMzaY= cloud.google.com/go v0.110.7 h1:rJyC7nWRg2jWGZ4wSJ5nY65GTdYJkg0cd/uXb+ACI6o= @@ -84,6 +86,8 @@ cloud.google.com/go/compute v1.23.0/go.mod h1:4tCnrn48xsqlwSAiLf1HXMQk8CONslYbdi cloud.google.com/go/compute/metadata v0.2.3/go.mod h1:VAV5nSsACxMJvgaAuX6Pk2AawlZn8kiOGuCv6gTkwuA= cloud.google.com/go/compute/metadata v0.6.0 h1:A6hENjEsCDtC1k8byVsgwvVcioamEHvZ4j01OwKxG9I= cloud.google.com/go/compute/metadata v0.6.0/go.mod h1:FjyFAW1MW0C203CEOMDTu3Dk1FlqW3Rga40jzHL4hfg= +cloud.google.com/go/compute/metadata v0.9.0 h1:pDUj4QMoPejqq20dK0Pg2N4yG9zIkYGdBtwLoEkH9Zs= +cloud.google.com/go/compute/metadata v0.9.0/go.mod h1:E0bWwX5wTnLPedCKqk3pJmVgCBSM6qQI1yTBdEb3C10= cloud.google.com/go/contactcenterinsights v1.6.0/go.mod h1:IIDlT6CLcDoyv79kDv8iWxMSTZhLxSCofVV5W6YFM/w= cloud.google.com/go/contactcenterinsights v1.10.0 h1:YR2aPedGVQPpFBZXJnPkqRj8M//8veIZZH5ZvICoXnI= cloud.google.com/go/contactcenterinsights v1.10.0/go.mod h1:bsg/R7zGLYMVxFFzfh9ooLTruLRCG9fnzhH9KznHhbM= @@ -365,6 +369,14 @@ cloud.google.com/go/websecurityscanner v1.6.1/go.mod h1:Njgaw3rttgRHXzwCB8kgCYqv cloud.google.com/go/workflows v1.10.0/go.mod h1:fZ8LmRmZQWacon9UCX1r/g/DfAXx5VcPALq2CxzdePw= cloud.google.com/go/workflows v1.11.1 h1:2akeQ/PgtRhrNuD/n1WvJd5zb7YyuDZrlOanBj2ihPg= cloud.google.com/go/workflows v1.11.1/go.mod h1:Z+t10G1wF7h8LgdY/EmRcQY8ptBD/nvofaL6FqlET6g= +codeberg.org/go-fonts/liberation v0.5.0 h1:SsKoMO1v1OZmzkG2DY+7ZkCL9U+rrWI09niOLfQ5Bo0= +codeberg.org/go-fonts/liberation v0.5.0/go.mod h1:zS/2e1354/mJ4pGzIIaEtm/59VFCFnYC7YV6YdGl5GU= +codeberg.org/go-latex/latex v0.1.0 h1:hoGO86rIbWVyjtlDLzCqZPjNykpWQ9YuTZqAzPcfL3c= +codeberg.org/go-latex/latex v0.1.0/go.mod h1:LA0q/AyWIYrqVd+A9Upkgsb+IqPcmSTKc9Dny04MHMw= +codeberg.org/go-pdf/fpdf v0.10.0 h1:u+w669foDDx5Ds43mpiiayp40Ov6sZalgcPMDBcZRd4= +codeberg.org/go-pdf/fpdf v0.10.0/go.mod h1:Y0DGRAdZ0OmnZPvjbMp/1bYxmIPxm0ws4tfoPOc4LjU= +git.sr.ht/~sbinet/gg v0.6.0 h1:RIzgkizAk+9r7uPzf/VfbJHBMKUr0F5hRFxTUGMnt38= +git.sr.ht/~sbinet/gg v0.6.0/go.mod h1:uucygbfC9wVPQIfrmwM2et0imr8L7KQWywX0xpFMm94= github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.0/go.mod h1:j2chePtV91HrC22tGoRX3sGY42uF13WzmmV80/OdVAA= github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= github.com/BurntSushi/toml v1.4.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho= @@ -373,14 +385,20 @@ github.com/DataDog/zstd v1.5.2 h1:vUG4lAyuPCXO0TLbXvPv7EB7cNK1QV/luu55UHLrrn8= github.com/DataDog/zstd v1.5.2/go.mod h1:g4AWEaM3yOg3HYfnJ3YIawPnVdXJh9QME85blwSAmyw= github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.25.0 h1:3c8yed4lgqTt+oTQ+JNMDo+F4xprBf+O/il4ZC0nRLw= github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.25.0/go.mod h1:obipzmGjfSjam60XLwGfqUkJsfiheAl+TUjG+4yzyPM= +github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.30.0 h1:sBEjpZlNHzK1voKq9695PJSX2o5NEXl7/OL3coiIY0c= +github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp 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h1:JwrycNnC8+sZPDyzM3MQ86LvaGzSpfxg885KOOwFRW4= +github.com/ajstarks/svgo v0.0.0-20211024235047-1546f124cd8b h1:slYM766cy2nI3BwyRiyQj/Ud48djTMtMebDqepE95rw= +github.com/ajstarks/svgo v0.0.0-20211024235047-1546f124cd8b/go.mod h1:1KcenG0jGWcpt8ov532z81sp/kMMUG485J2InIOyADM= github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 h1:JYp7IbQjafoB+tBA3gMyHYHrpOtNuDiK/uB5uXxq5wM= github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d h1:UQZhZ2O0vMHr2cI+DC1Mbh0TJxzA3RcLoMsFw+aXw7E= github.com/andybalholm/brotli v1.0.4 h1:V7DdXeJtZscaqfNuAdSRuRFzuiKlHSC/Zh3zl9qY3JY= @@ -396,6 +414,8 @@ github.com/armon/go-radix v1.0.0 h1:F4z6KzEeeQIMeLFa97iZU6vupzoecKdU5TX24SNppXI= github.com/aws/smithy-go v1.22.2/go.mod h1:irrKGvNn1InZwb2d7fkIRNucdfwR8R+Ts3wxYa/cJHg= github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM= github.com/bgentry/speakeasy v0.1.0 h1:ByYyxL9InA1OWqxJqqp2A5pYHUrCiAL6K3J+LKSsQkY= +github.com/campoy/embedmd v1.0.0 h1:V4kI2qTJJLf4J29RzI/MAt2c3Bl4dQSYPuflzwFH2hY= +github.com/campoy/embedmd v1.0.0/go.mod h1:oxyr9RCiSXg0M3VJ3ks0UGfp98BpSSGr0kpiX3MzVl8= github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU= github.com/census-instrumentation/opencensus-proto v0.4.1 h1:iKLQ0xPNFxR/2hzXZMrBo8f1j86j5WHzznCCQxV/b8g= github.com/census-instrumentation/opencensus-proto v0.4.1/go.mod h1:4T9NM4+4Vw91VeyqjLS6ao50K5bOcLKN6Q42XnYaRYw= @@ -410,6 +430,8 @@ github.com/cncf/udpa/go v0.0.0-20220112060539-c52dc94e7fbe/go.mod h1:6pvJx4me5XP github.com/cncf/xds/go v0.0.0-20230607035331-e9ce68804cb4/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs= github.com/cncf/xds/go v0.0.0-20241223141626-cff3c89139a3 h1:boJj011Hh+874zpIySeApCX4GeOjPl9qhRF3QuIZq+Q= github.com/cncf/xds/go v0.0.0-20241223141626-cff3c89139a3/go.mod h1:W+zGtBO5Y1IgJhy4+A9GOqVhqLpfZi+vwmdNXUehLA8= +github.com/cncf/xds/go v0.0.0-20251210132809-ee656c7534f5 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h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k= github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q= github.com/golang/glog v1.1.0/go.mod h1:pfYeQZ3JWZoXTV5sFc986z3HTpwQs9At6P4ImfuP3NQ= github.com/golang/glog v1.2.4 h1:CNNw5U8lSiiBk7druxtSHHTsRWcxKoac6kZKm2peBBc= github.com/golang/glog v1.2.4/go.mod h1:6AhwSGph0fcJtXVM/PEHPqZlFeoLxhs7/t5UDAwmO+w= +github.com/golang/glog v1.2.5 h1:DrW6hGnjIhtvhOIiAKT6Psh/Kd/ldepEa81DKeiRJ5I= +github.com/golang/glog v1.2.5/go.mod h1:6AhwSGph0fcJtXVM/PEHPqZlFeoLxhs7/t5UDAwmO+w= github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da h1:oI5xCqsCo564l8iNU+DwB5epxmsaqB+rhGL0m5jtYqE= github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc= github.com/golang/mock v1.1.1 h1:G5FRp8JnTd7RQH5kemVNlMeyXQAztQ3mOWV95KxsXH8= @@ -463,6 +499,7 @@ github.com/google/btree v1.0.1/go.mod h1:xXMiIv4Fb/0kKde4SpL7qlzvu5cMJDRkFDxJfI9 github.com/google/flatbuffers v2.0.8+incompatible h1:ivUb1cGomAB101ZM1T0nOiWz9pSrTMoa9+EiY7igmkM= github.com/google/flatbuffers v2.0.8+incompatible/go.mod h1:1AeVuKshWv4vARoZatz6mlQ0JxURH0Kv5+zNeJKJCa8= github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M= +github.com/google/go-tpm-tools v0.3.13-0.20230620182252-4639ecce2aba h1:qJEJcuLzH5KDR0gKc0zcktin6KSAwL7+jWKBYceddTc= github.com/google/go-tpm-tools v0.3.13-0.20230620182252-4639ecce2aba/go.mod h1:EFYHy8/1y2KfgTAsx7Luu7NGhoxtuVHnNo8jE7FikKc= github.com/google/gofuzz v1.0.0 h1:A8PeW59pxE9IoFRqBp37U+mSNaQoZ46F1f0f863XSXw= github.com/google/martian/v3 v3.3.2 h1:IqNFLAmvJOgVlpdEBiQbDc2EwKW77amAycfTuWKdfvw= @@ -551,6 +588,8 @@ github.com/prometheus/client_golang v1.11.1 h1:+4eQaD7vAZ6DsfsxB15hbE0odUjGI5ARs github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA= github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E= github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY= +github.com/prometheus/client_model v0.6.2 h1:oBsgwpGs7iVziMvrGhE53c/GrLUsZdHnqNwqPLxwZyk= +github.com/prometheus/client_model v0.6.2/go.mod h1:y3m2F6Gdpfy6Ut/GBsUqTWZqCUvMVzSfMLjcu6wAwpE= github.com/prometheus/common v0.26.0 h1:iMAkS2TDoNWnKM+Kopnx/8tnEStIfpYA0ur0xQzzhMQ= github.com/prometheus/procfs v0.6.0 h1:mxy4L2jP6qMonqmq+aTtOx1ifVWUgG/TAmntgbh3xv4= github.com/rogpeppe/fastuuid v1.2.0 h1:Ppwyp6VYCF1nvBTXL3trRso7mXMlRrw9ooo375wvi2s= @@ -558,6 +597,8 @@ github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6L github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs= github.com/rogpeppe/go-internal v1.13.1 h1:KvO1DLK/DRN07sQ1LQKScxyZJuNnedQ5/wKSR38lUII= github.com/rogpeppe/go-internal v1.13.1/go.mod h1:uMEvuHeurkdAXX61udpOXGD/AzZDWNMNyH2VO9fmH0o= +github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ= +github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc= github.com/rs/zerolog v1.34.0 h1:k43nTLIwcTVQAncfCw4KZ2VY6ukYoZaBPNOE8txlOeY= github.com/rs/zerolog v1.34.0/go.mod h1:bJsvje4Z08ROH4Nhs5iH600c3IkWhwp44iRc54W6wYQ= github.com/ryanuber/columnize v2.1.2+incompatible h1:C89EOx/XBWwIXl8wm8OPJBd7kPF25UfsK2X7Ph/zCAk= @@ -569,12 +610,16 @@ github.com/spf13/afero v1.10.0 h1:EaGW2JJh15aKOejeuJ+wpFSHnbd7GE6Wvp3TsNhb6LY= github.com/spf13/afero v1.10.0/go.mod h1:UBogFpq8E9Hx+xc5CNTTEpTnuHVmXDwZcZcE1eb/UhQ= github.com/spf13/cast v1.3.1 h1:nFm6S0SMdyzrzcmThSipiEubIDy8WEXKNZ0UOgiRpng= github.com/spf13/cast v1.3.1/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE= +github.com/spiffe/go-spiffe/v2 v2.6.0 h1:l+DolpxNWYgruGQVV0xsfeya3CsC7m8iBzDnMpsbLuo= +github.com/spiffe/go-spiffe/v2 v2.6.0/go.mod h1:gm2SeUoMZEtpnzPNs2Csc0D/gX33k1xIx7lEzqblHEs= github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY= github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA= github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA= github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4= github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4= +github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U= +github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U= github.com/tinylib/msgp v1.1.8 h1:FCXC1xanKO4I8plpHGH2P7koL/RzZs12l/+r7vakfm0= github.com/tinylib/msgp v1.1.8/go.mod h1:qkpG+2ldGg4xRFmx+jfTvZPxfGFhi64BcnL9vkCm/Tw= github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926 h1:G3dpKMzFDjgEh2q1Z7zUUtKa8ViPtH+ocF0bE0g00O8= @@ -586,8 +631,12 @@ go.opencensus.io v0.24.0 h1:y73uSU6J157QMP2kn2r30vwW1A2W2WFwSCGnAVxeaD0= go.opencensus.io v0.24.0/go.mod h1:vNK8G9p7aAivkbmorf4v+7Hgx+Zs0yY+0fOtgBfjQKo= go.opentelemetry.io/contrib/detectors/gcp v1.34.0 h1:JRxssobiPg23otYU5SbWtQC//snGVIM3Tx6QRzlQBao= go.opentelemetry.io/contrib/detectors/gcp v1.34.0/go.mod h1:cV4BMFcscUR/ckqLkbfQmF0PRsq8w/lMGzdbCSveBHo= +go.opentelemetry.io/contrib/detectors/gcp v1.39.0 h1:kWRNZMsfBHZ+uHjiH4y7Etn2FK26LAGkNFw7RHv1DhE= +go.opentelemetry.io/contrib/detectors/gcp v1.39.0/go.mod h1:t/OGqzHBa5v6RHZwrDBJ2OirWc+4q/w2fTbLZwAKjTk= go.opentelemetry.io/proto/otlp v1.0.0 h1:T0TX0tmXU8a3CbNXzEKGeU5mIVOdf0oykP+u2lIVU/I= go.opentelemetry.io/proto/otlp v1.0.0/go.mod h1:Sy6pihPLfYHkr3NkUbEhGHFhINUSI/v80hjKIs5JXpM= +go.opentelemetry.io/proto/otlp v1.7.1 h1:gTOMpGDb0WTBOP8JaO72iL3auEZhVmAQg4ipjOVAtj4= +go.opentelemetry.io/proto/otlp v1.7.1/go.mod h1:b2rVh6rfI/s2pHWNlB7ILJcRALpcNDzKhACevjI+ZnE= go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc= go.uber.org/automaxprocs v1.5.3/go.mod h1:eRbA25aqJrxAbsLO0xy5jVwPt7FQnRgjW+efnwa1WM0= go.uber.org/automaxprocs v1.6.0 h1:O3y2/QNTOdbF+e/dpXNNW7Rx2hZ4sTIPyybbxyNqTUs= @@ -607,6 +656,8 @@ golang.org/x/crypto v0.44.0/go.mod h1:013i+Nw79BMiQiMsOPcVCB5ZIJbYkerPrGnOa00tvm golang.org/x/crypto v0.46.0/go.mod h1:Evb/oLKmMraqjZ2iQTwDwvCtJkczlDuTmdJXoZVzqU0= golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA= golang.org/x/exp v0.0.0-20250106191152-7588d65b2ba8/go.mod h1:tujkw807nyEEAamNbDrEGzRav+ilXA7PCRAd6xsmwiU= +golang.org/x/image v0.25.0 h1:Y6uW6rH1y5y/LK1J8BPWZtr6yZ7hrsy6hFrXjgsc2fQ= +golang.org/x/image v0.25.0/go.mod h1:tCAmOEGthTtkalusGp1g3xa2gke8J6c2N565dTyl9Rs= golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE= golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU= golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3 h1:XQyxROzUlZH+WIQwySDgnISgOivlhjIEwaQaJEJrrN0= @@ -619,9 +670,11 @@ golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs= golang.org/x/mod v0.13.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c= golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c= golang.org/x/mod v0.18.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c= +golang.org/x/mod v0.21.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY= golang.org/x/mod v0.25.0 h1:n7a+ZbQKQA/Ysbyb0/6IbB1H/X41mKgbhfv7AfG/44w= golang.org/x/mod v0.25.0/go.mod h1:IXM97Txy2VM4PJ3gI61r1YEk/gAj6zAHN3AdZt6S9Ww= golang.org/x/mod v0.29.0/go.mod h1:NyhrlYXJ2H4eJiRy/WDBO6HMqZQ6q9nk4JzS3NuCK+w= +golang.org/x/mod v0.31.0 h1:HaW9xtz0+kOcWKwli0ZXy79Ix+UW/vOfmWI5QVd2tgI= golang.org/x/mod v0.31.0/go.mod h1:43JraMp9cGx1Rx3AqioxrbrhNsLl2l/iNAvuBkrezpg= golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= @@ -641,13 +694,13 @@ golang.org/x/net v0.37.0/go.mod h1:ivrbrMbzFq5J41QOQh0siUuly180yBYtLp+CKbEaFx8= golang.org/x/net v0.46.0/go.mod h1:Q9BGdFy1y4nkUwiLvT5qtyhAnEHgnQ/zd8PfU6nc210= golang.org/x/net v0.47.0 h1:Mx+4dIFzqraBXUugkia1OOvlD6LemFo1ALMHjrXDOhY= golang.org/x/net v0.47.0/go.mod h1:/jNxtkgq5yWUGYkaZGqo27cfGZ1c5Nen03aYrrKpVRU= -golang.org/x/net v0.48.0 h1:zyQRTTrjc33Lhh0fBgT/H3oZq9WuvRR5gPC70xpDiQU= -golang.org/x/net v0.48.0/go.mod h1:+ndRgGjkh8FGtu1w1FGbEC31if4VrNVMuKTgcAAnQRY= 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 v0.7.0/go.mod h1:hPLQkd9LyjfXTiRohC/41GhcFqxisoUQ99sCUOHO9x4= golang.org/x/oauth2 v0.25.0 h1:CY4y7XT9v0cRI9oupztF8AgiIu99L/ksR/Xp/6jrZ70= golang.org/x/oauth2 v0.25.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI= +golang.org/x/oauth2 v0.34.0 h1:hqK/t4AKgbqWkdkcAeI8XLmbK+4m4G5YeQRrmiotGlw= +golang.org/x/oauth2 v0.34.0/go.mod h1:lzm5WQJQwKZ3nwavOZ3IS5Aulzxi68dUSgRHujetwEA= golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/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 v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= @@ -661,6 +714,7 @@ golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw= golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA= golang.org/x/sync v0.17.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI= golang.org/x/sync v0.18.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI= +golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4= golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI= golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= @@ -678,15 +732,16 @@ golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= +golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= golang.org/x/sys v0.31.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k= golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k= golang.org/x/sys v0.37.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks= -golang.org/x/sys v0.39.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks= golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE= golang.org/x/telemetry v0.0.0-20240521205824-bda55230c457 h1:zf5N6UOrA487eEFacMePxjXAJctxKmyjKUsjA11Uzuk= golang.org/x/telemetry v0.0.0-20240521205824-bda55230c457/go.mod h1:pRgIJT+bRLFKnoM1ldnzKoxTIn14Yxz928LQRYYgIN0= golang.org/x/telemetry v0.0.0-20251008203120-078029d740a8/go.mod h1:Pi4ztBfryZoJEkyFTI5/Ocsu2jXyDr6iSdgJiYE/uwE= +golang.org/x/telemetry v0.0.0-20251203150158-8fff8a5912fc h1:bH6xUXay0AIFMElXG2rQ4uiE+7ncwtiOdPfYK1NK2XA= golang.org/x/telemetry v0.0.0-20251203150158-8fff8a5912fc/go.mod h1:hKdjCMrbv9skySur+Nek8Hd0uJ0GuxJIoIX2payrIdQ= golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8= golang.org/x/term v0.3.0/go.mod h1:q750SLmJuPmVoN1blW3UFBPREJfb1KmY3vwxfr+nFDA= @@ -709,7 +764,6 @@ golang.org/x/text v0.23.0/go.mod h1:/BLNzu4aZCJ1+kcD0DNRotWKage4q2rGVAg4o22unh4= golang.org/x/text v0.26.0/go.mod h1:QK15LZJUUQVJxhz7wXgxSy/CJaTFjd0G+YLonydOVQA= golang.org/x/text v0.31.0 h1:aC8ghyu4JhP8VojJ2lEHBnochRno1sgL6nEi9WGFGMM= golang.org/x/text v0.31.0/go.mod h1:tKRAlv61yKIjGGHX/4tP1LTbc13YSec1pxVEWXzfoeM= -golang.org/x/text v0.32.0/go.mod h1:o/rUWzghvpD5TXrTIBuJU77MTaN0ljMWE47kxGJQ7jY= golang.org/x/text v0.33.0 h1:B3njUFyqtHDUI5jMn1YIr5B0IE2U0qck04r6d4KPAxE= golang.org/x/text v0.33.0/go.mod h1:LuMebE6+rBincTi9+xWTY8TztLzKHc/9C1uBCG27+q8= golang.org/x/time v0.0.0-20200416051211-89c76fbcd5d1/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= @@ -724,14 +778,18 @@ golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58 golang.org/x/tools v0.14.0/go.mod h1:uYBEerGOWcJyEORxN+Ek8+TT266gXkNlHdJBwexUsBg= golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk= golang.org/x/tools v0.22.0/go.mod h1:aCwcsjqvq7Yqt6TNyX7QMU2enbQ/Gt0bo6krSeEri+c= +golang.org/x/tools v0.26.0/go.mod h1:TPVVj70c7JJ3WCazhD8OdXcZg/og+b9+tH/KxylGwH0= golang.org/x/tools v0.34.0 h1:qIpSLOxeCYGg9TrcJokLBG4KFA6d795g0xkBkiESGlo= golang.org/x/tools v0.34.0/go.mod h1:pAP9OwEaY1CAW3HOmg3hLZC5Z0CCmzjAF2UQMSqNARg= golang.org/x/tools v0.37.0/go.mod h1:MBN5QPQtLMHVdvsbtarmTNukZDdgwdwlO5qGacAzF0w= golang.org/x/tools v0.38.0/go.mod h1:yEsQ/d/YK8cjh0L6rZlY8tgtlKiBNTL14pGDJPJpYQs= golang.org/x/tools v0.39.0/go.mod h1:JnefbkDPyD8UU2kI5fuf8ZX4/yUeh9W877ZeBONxUqQ= +golang.org/x/tools v0.40.0 h1:yLkxfA+Qnul4cs9QA3KnlFu0lVmd8JJfoq+E41uSutA= golang.org/x/tools v0.40.0/go.mod h1:Ik/tzLRlbscWpqqMRjyWYDisX8bG13FrdXp3o4Sr9lc= golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 h1:H2TDz8ibqkAF6YGhCdN3jS9O0/s90v0rJh3X/OLHEUk= golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2/go.mod h1:K8+ghG5WaK9qNqU5K3HdILfMLy1f3aNYFI/wnl100a8= +gonum.org/v1/plot v0.15.2 h1:Tlfh/jBk2tqjLZ4/P8ZIwGrLEWQSPDLRm/SNWKNXiGI= +gonum.org/v1/plot v0.15.2/go.mod h1:DX+x+DWso3LTha+AdkJEv5Txvi+Tql3KAGkehP0/Ubg= google.golang.org/api v0.126.0 h1:q4GJq+cAdMAC7XP7njvQ4tvohGLiSlytuL4BQxbIZ+o= google.golang.org/api v0.126.0/go.mod h1:mBwVAtz+87bEN6CbA1GtZPDOqY2R5ONPqJeIlvyo4Aw= google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM= @@ -749,6 +807,7 @@ google.golang.org/genproto/googleapis/rpc v0.0.0-20230803162519-f966b187b2e5/go. google.golang.org/genproto/googleapis/rpc v0.0.0-20230822172742-b8732ec3820d/go.mod h1:+Bk1OCOj40wS2hwAMA+aCW9ypzm63QTBBHp6lQ3p+9M= google.golang.org/genproto/googleapis/rpc v0.0.0-20250115164207-1a7da9e5054f/go.mod h1:+2Yz8+CLJbIfL9z73EW45avw8Lmge3xVElCP9zEKi50= google.golang.org/genproto/googleapis/rpc v0.0.0-20250409194420-de1ac958c67a/go.mod h1:qQ0YXyHHx3XkvlzUtpXDkS29lDSafHMZBAZDc03LQ3A= +google.golang.org/genproto/googleapis/rpc v0.0.0-20251124214823-79d6a2a48846/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg= google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY= @@ -757,9 +816,12 @@ google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTp google.golang.org/grpc v1.57.0/go.mod h1:Sd+9RMTACXwmub0zcNY2c4arhtrbBYD1AUHI/dt16Mo= google.golang.org/grpc v1.59.0/go.mod h1:aUPDwccQo6OTjy7Hct4AfBPD1GptF4fyUjIkQ9YtF98= google.golang.org/grpc v1.71.0/go.mod h1:H0GRtasmQOh9LkFoCPDu3ZrwUtD1YGE+b2vYBYd/8Ec= +google.golang.org/grpc/examples v0.0.0-20250407062114-b368379ef8f6 h1:ExN12ndbJ608cboPYflpTny6mXSzPrDLh0iTaVrRrds= +google.golang.org/grpc/examples v0.0.0-20250407062114-b368379ef8f6/go.mod h1:6ytKWczdvnpnO+m+JiG9NjEDzR1FJfsnmJdG7B8QVZ8= google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I= google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I= google.golang.org/protobuf v1.36.4/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE= +google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY= gopkg.in/alecthomas/kingpin.v2 v2.2.6 h1:jMFz6MfLP0/4fUyZle81rXUoxOBFi19VUFKVDOQfozc= gopkg.in/mgo.v2 v2.0.0-20190816093944-a6b53ec6cb22 h1:VpOs+IwYnYBaFnrNAeB8UUWtL3vEUnzSCL1nVjPhqrw= gopkg.in/mgo.v2 v2.0.0-20190816093944-a6b53ec6cb22/go.mod h1:yeKp02qBN3iKW1OzL3MGk2IdtZzaj7SFntXj72NppTA= @@ -770,5 +832,7 @@ gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc h1:/hemPrYIhOhy8zYrNj+069zDB68us2sMGsfkFJO0iZs= honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +rsc.io/pdf v0.1.1 h1:k1MczvYDUvJBe93bYd7wrZLLUEcLZAuF824/I4e5Xr4= +rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4= sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q= sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc= diff --git a/mock/mount/..2006_01_02_15_04_05.0000000000/database_host b/mock/mount/..2006_01_02_15_04_05.0000000000/database_host new file mode 100644 index 0000000..2fbb50c --- /dev/null +++ b/mock/mount/..2006_01_02_15_04_05.0000000000/database_host @@ -0,0 +1 @@ +localhost diff --git a/mock/mount/..2006_01_02_15_04_05.0000000000/database_port b/mock/mount/..2006_01_02_15_04_05.0000000000/database_port new file mode 100644 index 0000000..38627a6 --- /dev/null +++ b/mock/mount/..2006_01_02_15_04_05.0000000000/database_port @@ -0,0 +1 @@ +5432 diff --git a/mock/mount/..data b/mock/mount/..data new file mode 120000 index 0000000..c6e0574 --- /dev/null +++ b/mock/mount/..data @@ -0,0 +1 @@ +..2006_01_02_15_04_05.0000000000 \ No newline at end of file diff --git a/mock/mount/database_host b/mock/mount/database_host new file mode 120000 index 0000000..d226959 --- /dev/null +++ b/mock/mount/database_host @@ -0,0 +1 @@ +..data/database_host \ No newline at end of file diff --git a/mock/mount/database_port b/mock/mount/database_port new file mode 120000 index 0000000..3aba9bf --- /dev/null +++ b/mock/mount/database_port @@ -0,0 +1 @@ +..data/database_port \ No newline at end of file diff --git a/providers/k8smount/go.mod b/providers/k8smount/go.mod new file mode 100644 index 0000000..a6db145 --- /dev/null +++ b/providers/k8smount/go.mod @@ -0,0 +1,20 @@ +module github.com/knadh/koanf/providers/k8smount + +go 1.25 + +require ( + github.com/fsnotify/fsnotify v1.9.0 + github.com/knadh/koanf/maps v0.1.2 + github.com/knadh/koanf/v2 v2.3.4 + github.com/stretchr/testify v1.11.1 +) + +require ( + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/go-viper/mapstructure/v2 v2.4.0 // indirect + github.com/mitchellh/copystructure v1.2.0 // indirect + github.com/mitchellh/reflectwalk v1.0.2 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + golang.org/x/sys v0.13.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/providers/k8smount/go.sum b/providers/k8smount/go.sum new file mode 100644 index 0000000..7248a87 --- /dev/null +++ b/providers/k8smount/go.sum @@ -0,0 +1,24 @@ +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= +github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k= +github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0= +github.com/go-viper/mapstructure/v2 v2.4.0 h1:EBsztssimR/CONLSZZ04E8qAkxNYq4Qp9LvH92wZUgs= +github.com/go-viper/mapstructure/v2 v2.4.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM= +github.com/knadh/koanf/maps v0.1.2 h1:RBfmAW5CnZT+PJ1CVc1QSJKf4Xu9kxfQgYVQSu8hpbo= +github.com/knadh/koanf/maps v0.1.2/go.mod h1:npD/QZY3V6ghQDdcQzl1W4ICNVTkohC8E73eI2xW4yI= +github.com/knadh/koanf/v2 v2.3.4 h1:fnynNSDlujWE+v83hAp8wKr/cdoxHLO0629SN+U8Urc= +github.com/knadh/koanf/v2 v2.3.4/go.mod h1:gRb40VRAbd4iJMYYD5IxZ6hfuopFcXBpc9bbQpZwo28= +github.com/mitchellh/copystructure v1.2.0 h1:vpKXTN4ewci03Vljg/q9QvCGUDttBOGBIa15WveJJGw= +github.com/mitchellh/copystructure v1.2.0/go.mod h1:qLl+cE2AmVv+CoeAwDPye/v+N2HKCj9FbZEVFJRxO9s= +github.com/mitchellh/reflectwalk v1.0.2 h1:G2LzWKi524PWgd3mLHV8Y5k7s6XUvT0Gef6zxSIeXaQ= +github.com/mitchellh/reflectwalk v1.0.2/go.mod h1:mSTlrgnPZtwu0c4WaC2kGObEpuNDbx0jmZXqmk4esnw= +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/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U= +github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U= +golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE= +golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= +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/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/providers/k8smount/helper_test.go b/providers/k8smount/helper_test.go new file mode 100644 index 0000000..d3e441f --- /dev/null +++ b/providers/k8smount/helper_test.go @@ -0,0 +1,105 @@ +package k8smount_test + +import ( + "fmt" + "os" + "path/filepath" + "testing" + "time" +) + +const ( + mountTimeFmt = "..2006_01_02_15_04_05.0000000000" + dataDir = "..data" +) + +// writeVolumeMount creates a file structure that matches how a ConfigMap or Secret will be mounted +// in a Kubernetes Pod. +// +// First, files are created for each data field. These exist within a timestamp-based directory, +// likely when the ConfigMap or Secret was last modified. +// +// ..2025_06_28_09_28_32.3151791122/ +// ├── database_hostname +// ├── database_name +// └── database_port +// +// A symlink is then created for "..data" to the directory containing the data: +// +// ..data -> ..2025_06_28_09_28_32.3151791122 +// +// Finally, symlinks are created for the data files, via the "..data" symlink: +// +// database_hostname -> ..data/database_hostname +// database_name -> ..data/database_name +// database_port -> ..data/database_port +func writeVolumeMount(tb testing.TB, mount string, data map[string]string) error { + tb.Helper() + + return writeVolumeMountAt(tb, time.Now(), mount, data) +} + +// writeVolumeMountAtTime creates a file structure that matches how a ConfigMap or Secret will be +// mounted in a Kubernetes Pod, using the given time. See writeVolumeMount for a detailed +// description of the resulting file structure. +// +// This function can be called multiple times with different times, with the most recent call taking +// precedence if any conflicts occur. +func writeVolumeMountAt(tb testing.TB, t time.Time, mount string, data map[string]string) error { + tb.Helper() + + dir := t.UTC().Format(mountTimeFmt) + dirPath := filepath.Join(mount, dir) + + for key, value := range data { + if err := writeFile(tb, filepath.Join(dirPath, key), value); err != nil { + return err + } + } + + tb.Chdir(mount) + + if err := os.Remove(dataDir); err != nil && !os.IsNotExist(err) { + return fmt.Errorf("failed to cleanup existing symlink %s: %w", dataDir, err) + } + + if err := os.Symlink(dir, dataDir); err != nil { + return fmt.Errorf("failed to create %s symlink to %q: %w", "..data", dir, err) + } + + tb.Log("created symlink: ..data ->", dir) + + for key := range data { + target := filepath.Join(dataDir, key) + + if err := os.Remove(key); err != nil && !os.IsNotExist(err) { + return fmt.Errorf("failed to cleanup existing symlink %s: %w", key, err) + } + + if err := os.Symlink(target, key); err != nil { + return fmt.Errorf("failed to create %q symlink to %q: %w", key, target, err) + } + + tb.Log("created symlink:", key, "->", target) + } + + return nil +} + +func writeFile(tb testing.TB, path, content string) error { + tb.Helper() + + dir := filepath.Dir(path) + + if err := os.MkdirAll(dir, 0o755); err != nil { + return fmt.Errorf("failed to create directory %q: %w", dir, err) + } + + if err := os.WriteFile(path, []byte(content), 0o600); err != nil { + return fmt.Errorf("failed to create file %q: %w", path, err) + } + + tb.Log("wrote:", path) + + return nil +} diff --git a/providers/k8smount/provider.go b/providers/k8smount/provider.go new file mode 100644 index 0000000..823868b --- /dev/null +++ b/providers/k8smount/provider.go @@ -0,0 +1,246 @@ +// Package k8smount contains a [koanf.Provider] for loading configuration from Kubernetes volume +// mounts, i.e. Secrets or ConfigMaps mounted into a Pod. +// +// This is most appropriate for key-value data, such as the following example ConfigMap. +// +// apiVersion: v1 +// kind: ConfigMap +// metadata: +// name: example +// data: +// foo: "true" +// bar: "1" +// baz: "value" +// +// If values contains structured data, such as JSON or YAML, the [file.File] provider is recommended +// instead, along with the appropriate parser. +// +// [koanf.Provider]: https://pkg.go.dev/github.com/knadh/koanf/v2#Provider +// [file.File]: https://pkg.go.dev/github.com/knadh/koanf/providers/file#File +package k8smount + +import ( + "errors" + "fmt" + "io/fs" + "os" + "path/filepath" + "strings" + "sync/atomic" + "syscall" + "time" + + "github.com/fsnotify/fsnotify" + "github.com/knadh/koanf/maps" + "github.com/knadh/koanf/v2" +) + +// Errors returned by the provider. +var ErrAlreadyWatched = errors.New("mount is already being watched") + +// Non-allocating compile-time check for interface implementation. +var _ koanf.Provider = (*K8SMount)(nil) + +// Opt represents optional configuration passed to the provider. +type Opt struct { + // TransformFunc is an optional callback that takes a volume mount field's name and value, runs + // arbitrary transformations on them and returns a transformed string key and value of any type. + // Common usecase are lowercasing keys, replacing _ with . etc. For example, DB_HOST -> db.host. + // If the returned key is an empty string (""), it is ignored altogether. + TransformFunc func(k, v string) (string, any) +} + +// K8SMount implements a koanf.Provider for Kubernetes volume mounts. +type K8SMount struct { + mount string + delim string + transformFunc func(k, v string) (string, any) + watching atomic.Bool + watcher *fsnotify.Watcher +} + +// Provider creates a new K8SMount provider capable of reading in mounted secrets and configmaps in +// a Kubernetes pod. +// +// The given mount should be the mount point of the configmap or secret. The delimiter is used to +// create a hierarchy of keys based on the mounted filename. For example, a configmap mounted at +// "/mnt/config/" with a key of "log_level" set to "INFO" and a delimiter of "_" would result in +// {"log":{"level":"INFO"}} being read as configuration. +// +// Keys mounted in directories are always split. For example, if the above key was mounted at +// "log/level" instead, it will always produce {"log":{"level":"INFO"}} as the result. +func Provider(mount, delim string, o Opt) *K8SMount { + return &K8SMount{ + mount: filepath.Clean(mount), + delim: delim, + transformFunc: o.TransformFunc, + } +} + +// ReadBytes is not supported by the provider. +func (*K8SMount) ReadBytes() ([]byte, error) { + return nil, errors.New("k8smount provider does not support this method") +} + +// Read collects the contents of all files under the mount point and returns them as a map. +func (k *K8SMount) Read() (map[string]any, error) { + root, err := os.OpenRoot(k.mount) + if err != nil { + return nil, fmt.Errorf("failed to open mount: %w", err) + } + + data := map[string]any{} + mountFS := root.FS() + + if err := fs.WalkDir(mountFS, ".", func(path string, d fs.DirEntry, err error) error { + key, value, err := k.walkDir(mountFS, path, d, err) + if err != nil { + return err + } + + var val any + + key = strings.ReplaceAll(key, string(filepath.Separator), k.delim) + if k.transformFunc != nil { + key, val = k.transformFunc(key, value) + } else { + val = value + } + + if key != "" { + data[key] = val + } + + return nil + }); err != nil { + return nil, fmt.Errorf("failed to read configuration from mount: %q: %w", k.mount, err) + } + + return maps.Unflatten(data, k.delim), nil +} + +func (k *K8SMount) walkDir(mountFS fs.FS, path string, d fs.DirEntry, err error) (string, string, error) { + if err != nil { + return "", "", err + } + + if path == "." && d.IsDir() { + return "", "", nil + } + + resolved := path + + for d.Type()&os.ModeSymlink != 0 { + p, err := fs.ReadLink(mountFS, resolved) + // If a value is deleted from a configmap, the symlink for the value remains, but the + // underlying file is removed. If this occurs, ignore it, and let the caller either provide + // a default or fail due to the missing value. + if err != nil { + if errors.Is(err, syscall.ENOENT) { + return "", "", nil + } + + return "", "", err + } + + info, err := fs.Lstat(mountFS, p) + if err != nil { + if errors.Is(err, syscall.ENOENT) { + return "", "", nil + } + + return "", "", err + } + + d = fs.FileInfoToDirEntry(info) + resolved = p + } + + if d.IsDir() { + // don't skip ..data as it causes the symlinks we want to look at to be skipped + // instead, just skip the timestamp based directories + if strings.HasPrefix(path, "..") && path != "..data" { + return "", "", fs.SkipDir + } + + return "", "", nil + } + + content, err := fs.ReadFile(mountFS, path) + if err != nil { + return "", "", fmt.Errorf("failed to read file: %w", err) + } + + key := strings.TrimPrefix(path, k.mount) + return key, string(content), nil +} + +// Watch starts a watcher in a goroutine for the files under the mount point and calls the given +// function when changes occur. +// +// Only one watcher may be started at a time. +// +// If an error occurs, the function is called with the error before the watch is stopped. If the +// function is called with a nil error value, a change was detected successfully and watching will +// continue. +func (k *K8SMount) Watch(fn func(any, error)) error { + if k.watching.Swap(true) { + return ErrAlreadyWatched + } + + watcher, err := fsnotify.NewWatcher() + if err != nil { + return err + } + + k.watcher = watcher + go k.watchDir(fn) + + return watcher.Add(k.mount) +} + +func (k *K8SMount) watchDir(fn func(any, error)) { + defer k.watching.Store(false) + + var ( + lastEvent string + lastEventTime time.Time + ) + + for { + select { + case event, ok := <-k.watcher.Events: + if !ok { + return + } + + // Use a simple timer to buffer events as certain events fire + // multiple times on some platforms. + if event.String() == lastEvent && time.Since(lastEventTime) < time.Millisecond*5 { + continue + } + + lastEvent = event.String() + lastEventTime = time.Now() + + fn(nil, nil) + + case err, ok := <-k.watcher.Errors: + if !ok { + return + } + + fn(nil, err) + return + } + } +} + +// Unwatch stops a previously started Watch. +func (k *K8SMount) Unwatch() error { + if k.watcher != nil { + return k.watcher.Close() + } + + return nil +} diff --git a/providers/k8smount/provider_test.go b/providers/k8smount/provider_test.go new file mode 100644 index 0000000..e2d6a7b --- /dev/null +++ b/providers/k8smount/provider_test.go @@ -0,0 +1,265 @@ +package k8smount_test + +import ( + "os" + "path/filepath" + "strings" + "sync/atomic" + "testing" + "time" + + "github.com/knadh/koanf/providers/k8smount" + "github.com/stretchr/testify/assert" + "github.com/stretchr/testify/require" +) + +const testDelim = "." + +func Test_New(t *testing.T) { + // arrange + dir := t.TempDir() + + // act + provider := k8smount.Provider(dir, testDelim, k8smount.Opt{}) + + // assert + assert.NotNil(t, provider) +} + +func Test_K8SMount_ReadBytes(t *testing.T) { + // arrange + dir := t.TempDir() + provider := k8smount.Provider(dir, testDelim, k8smount.Opt{}) + + // act + content, err := provider.ReadBytes() + + // assert + assert.Empty(t, content) + assert.EqualError(t, err, "k8smount provider does not support this method") +} + +func Test_K8SMount_Read_Empty(t *testing.T) { + // arrange + dir := t.TempDir() + provider := k8smount.Provider(dir, testDelim, k8smount.Opt{}) + + // act + values, err := provider.Read() + + // assert + assert.Empty(t, values) + assert.NoError(t, err) +} + +func Test_K8SMount_Read_WithFiles(t *testing.T) { + // arrange + dir := t.TempDir() + + require.NoError(t, writeFile(t, filepath.Join(dir, "a"), "a")) + require.NoError(t, writeFile(t, filepath.Join(dir, "b.c"), "c")) + require.NoError(t, writeFile(t, filepath.Join(dir, "d.e.f"), "f")) + require.NoError(t, writeFile(t, filepath.Join(dir, "g", "h"), "h")) + + provider := k8smount.Provider(dir, testDelim, k8smount.Opt{}) + + // act + got, err := provider.Read() + + // assert + want := map[string]any{ + "a": "a", + "b": map[string]any{ + "c": "c", + }, + "d": map[string]any{ + "e": map[string]any{ + "f": "f", + }, + }, + "g": map[string]any{ + "h": "h", + }, + } + + assert.Equal(t, want, got) + assert.NoError(t, err) +} + +func Test_K8SMount_Read_WithVolumeMount(t *testing.T) { + tests := map[string]struct { + have map[string]string + transformFunc func(k, v string) (string, any) + want map[string]any + }{ + "no transform func": { + have: map[string]string{ + "a_foo": "foo-value", + "b_bar": "bar-value", + "b_baz": "baz-value", + }, + want: map[string]any{ + "a_foo": "foo-value", + "b_bar": "bar-value", + "b_baz": "baz-value", + }, + }, + "with transform func replace+lowercase": { + have: map[string]string{ + "a_foo": "foo-value", + "b_bar": "bar-value", + "b_baz": "baz-value", + }, + transformFunc: func(k, v string) (string, any) { + return strings.ToLower(strings.ReplaceAll(k, "_", testDelim)), v + }, + want: map[string]any{ + "a": map[string]any{ + "foo": "foo-value", + }, + "b": map[string]any{ + "bar": "bar-value", + "baz": "baz-value", + }, + }, + }, + "with transform func empty string": { + have: map[string]string{ + "a_foo": "foo-value", + "b_bar": "bar-value", + "b_baz": "baz-value", + }, + transformFunc: func(_, v string) (string, any) { + return "", v + }, + want: map[string]any{}, + }, + } + + for name, tt := range tests { + t.Run(name, func(t *testing.T) { + // arrange + dir := t.TempDir() + require.NoError(t, writeVolumeMount(t, dir, tt.have)) + + provider := k8smount.Provider(dir, "." /*delim*/, k8smount.Opt{ + TransformFunc: tt.transformFunc, + }) + + // act + got, err := provider.Read() + + // assert + assert.Equal(t, tt.want, got) + assert.NoError(t, err) + }) + } +} + +func Test_K8SMount_Read_MissingLink(t *testing.T) { + // arrange + now := time.Now() + + dir := t.TempDir() + require.NoError(t, writeVolumeMountAt(t, now, dir, map[string]string{ + "foo": "foo-value", + })) + + name := now.UTC().Format(mountTimeFmt) + file := filepath.Join(dir, name, "foo") + require.NoError(t, os.Remove(file)) + + provider := k8smount.Provider(dir, "." /*delim*/, k8smount.Opt{}) + + // act + got, err := provider.Read() + + // assert + assert.Empty(t, got) + assert.NoError(t, err) +} + +func Test_K8SMount_Read_MissingDir(t *testing.T) { + // arrange + provider := k8smount.Provider("/does/not/exist" /*dir*/, "." /*delim*/, k8smount.Opt{}) + + // act + values, err := provider.Read() + + // assert + assert.Empty(t, values) + assert.EqualError( + t, + err, + `failed to open mount: open /does/not/exist: no such file or directory`, + ) +} + +func Test_K8SMount_Watch_Success(t *testing.T) { + // arrange + dir := t.TempDir() + + require.NoError(t, writeFile(t, filepath.Join(dir, "a"), "a")) + + provider := k8smount.Provider(dir, "." /*delim*/, k8smount.Opt{}) + + _, err := provider.Read() + require.NoError(t, err) + + var watched atomic.Bool + + // act + require.NoError(t, provider.Watch(func(_ any, err error) { + assert.NoError(t, err) + watched.Store(true) + })) + + for !watched.Load() { + require.NoError(t, writeFile(t, filepath.Join(dir, "a"), "b")) + } + + // assert + require.NoError(t, provider.Unwatch()) + + got, err := provider.Read() + + want := map[string]any{ + "a": "b", + } + + assert.Equal(t, want, got) + assert.NoError(t, err) +} + +func Test_K8SMount_Watch_AlreadyWatching(t *testing.T) { + // arrange + dir := t.TempDir() + provider := k8smount.Provider(dir, "." /*delim*/, k8smount.Opt{}) + + require.NoError(t, provider.Watch(func(_ any, err error) { + assert.NoError(t, err) + })) + defer func() { + assert.NoError(t, provider.Unwatch()) + }() + + // act + err := provider.Watch(func(_ any, err error) { + assert.NoError(t, err) + }) + + // assert + assert.ErrorIs(t, err, k8smount.ErrAlreadyWatched) +} + +func Test_K8SMount_Unwatch(t *testing.T) { + // arrange + dir := t.TempDir() + provider := k8smount.Provider(dir, "." /*delim*/, k8smount.Opt{}) + + // act + err := provider.Unwatch() + + // assert + assert.NoError(t, err) +}