zones: introduce Zones.CephFSID and Zones.GetCephFSID()

the accessor doesn't generate one if needed yet

Signed-off-by: Alejandro Mery <amery@jpi.io>

go.mod

@@ -8,6 +8,7 @@ require (
 	darvaza.org/sidecar v0.0.2
 	darvaza.org/slog v0.5.3
 	github.com/burntSushi/toml v0.3.1
+	github.com/gofrs/uuid/v5 v5.0.0
 	github.com/hack-pad/hackpadfs v0.2.1
 	github.com/mgechev/revive v1.3.3
 	github.com/spf13/cobra v1.7.0

go.sum

@@ -26,6 +26,8 @@ github.com/fatih/color v1.15.0/go.mod h1:0h5ZqXfHYED7Bhv2ZJamyIOUej9KtShiJESRwBD
 github.com/fatih/structtag v1.2.0 h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4=
 github.com/fatih/structtag v1.2.0/go.mod h1:mBJUNpUnHmRKrKlQQlmCrh5PuhftFbNv8Ys4/aAZl94=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
+github.com/gofrs/uuid/v5 v5.0.0 h1:p544++a97kEL+svbcFbCQVM9KFu0Yo25UoISXGNNH9M=
+github.com/gofrs/uuid/v5 v5.0.0/go.mod h1:CDOjlDMVAtN56jqyRUZh58JT31Tiw7/oQyEXZV+9bD8=
 github.com/hack-pad/hackpadfs v0.2.1 h1:FelFhIhv26gyjujoA/yeFO+6YGlqzmc9la/6iKMIxMw=
 github.com/hack-pad/hackpadfs v0.2.1/go.mod h1:khQBuCEwGXWakkmq8ZiFUvUZz84ZkJ2KNwKvChs4OrU=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=

pkg/zones/ceph.go

@@ -0,0 +1,15 @@
+package zones
+
+import (
+	"darvaza.org/core"
+	"github.com/gofrs/uuid/v5"
+)
+
+// GetCephFSID returns our Ceph's FSID
+func (m *Zones) GetCephFSID() (uuid.UUID, error) {
+	if core.IsZero(m.CephFSID) {
+		// TODO: generate one
+		return uuid.Nil, nil
+	}
+	return m.CephFSID, nil
+}

pkg/zones/zones.go

@@ -6,6 +6,7 @@ import (
 	"sort"
 
 	"darvaza.org/resolver"
+	"github.com/gofrs/uuid/v5"
 )
 
 var (
@@ -135,15 +136,21 @@ func (z *Zone) GatewayIDs() ([]int, int) {
 	return out, len(out)
 }
 
+// revive:disable:line-length-limit
+
 // Zones represents all zones in a cluster
 type Zones struct {
 	dir      fs.FS
 	resolver resolver.Resolver
 	domain   string
 
+	CephFSID uuid.UUID `toml:"ceph_fsid,omitempty" json:"ceph_fsid,omitempty" yaml:"ceph_fsid,omitempty"`
+
 	Zones []*Zone `toml:"zones"`
 }
 
+// revive:enable:line-length-limit
+
 // ForEachMachine calls a function for each Machine in the cluster
 // until instructed to terminate the loop
 func (m *Zones) ForEachMachine(fn func(*Machine) bool) {