Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS
Mirrored from https://github.com/Slazee/caddy.git
Synced Nov 14, 05:15 UTC
caddy: Add InstanceID() method
Caddy can now generate and persist its own instance ID, a UUID that is stored in the data directory. This makes it possible to differentiate it from other instances in a cluster.
Matthew Holt committed
Mar 30, 2021 at 14:15 UTC
aac1ccf12d0076ce7ae2b67ed9cbdf55dc99e14e
3 files changed
+24
-1
caddy.go
+21
@@ -33,6 +33,7 @@ import (
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"time"
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"github.com/caddyserver/certmagic"
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+ "github.com/google/uuid"
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"go.uber.org/zap"
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)
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@@ -662,6 +663,26 @@ func ParseDuration(s string) (time.Duration, error) {
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return time.ParseDuration(s)
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}
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+// InstanceID returns the UUID for this instance, and generates one if it
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+// does not already exist. The UUID is stored in the local data directory,
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+// regardless of storage configuration, since each instance is intended to
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+// have its own unique ID.
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+func InstanceID() (uuid.UUID, error) {
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+ uuidFilePath := filepath.Join(AppDataDir(), "instance.uuid")
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+ uuidFileBytes, err := os.ReadFile(uuidFilePath)
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+ if os.IsNotExist(err) {
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+ uuid, err := uuid.NewRandom()
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+ if err != nil {
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+ return uuid, err
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+ }
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+ err = ioutil.WriteFile(uuidFilePath, []byte(uuid.String()), 0644)
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+ return uuid, err
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+ } else if err != nil {
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+ return [16]byte{}, err
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+ }
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+ return uuid.ParseBytes(uuidFileBytes)
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+}
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+
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// GoModule returns the build info of this Caddy
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// build from debug.BuildInfo (requires Go modules).
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// If no version information is available, a non-nil
go.mod
+1
@@ -10,6 +10,7 @@ require (
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github.com/dustin/go-humanize v1.0.1-0.20200219035652-afde56e7acac
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github.com/go-chi/chi v4.1.2+incompatible
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github.com/google/cel-go v0.6.0
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+ github.com/google/uuid v1.2.0
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github.com/klauspost/compress v1.11.3
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github.com/klauspost/cpuid/v2 v2.0.1
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github.com/lucas-clemente/quic-go v0.19.3
go.sum
+2
-1
@@ -304,8 +304,9 @@ github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm4
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github.com/google/trillian v1.2.2-0.20190612132142-05461f4df60a/go.mod h1:YPmUVn5NGwgnDUgqlVyFGMTgaWlnSvH7W5p+NdOG8UA=
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github.com/google/trillian-examples v0.0.0-20190603134952-4e75ba15216c/go.mod h1:WgL3XZ3pA8/9cm7yxqWrZE6iZkESB2ItGxy5Fo6k2lk=
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github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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-github.com/google/uuid v1.1.1 h1:Gkbcsh/GbpXz7lPftLA3P6TYMwjCLYm83jiFQZF/3gY=
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github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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+github.com/google/uuid v1.2.0 h1:qJYtXnJRWmpe7m/3XlyhrsLrEURqHRM2kxzoxXqyUDs=
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+github.com/google/uuid v1.2.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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github.com/googleapis/gax-go v2.0.0+incompatible h1:j0GKcs05QVmm7yesiZq2+9cxHkNK9YM6zKx4D2qucQU=
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github.com/googleapis/gax-go v2.0.0+incompatible/go.mod h1:SFVmujtThgffbyetf+mdk2eWhX2bMyUtNHzFKcPA9HY=
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github.com/googleapis/gax-go/v2 v2.0.3/go.mod h1:LLvjysVCY1JZeum8Z6l8qUty8fiNwE08qbEPm1M08qg=