ceph: zones.Zones.WriteCephConfig() and ceph.Config.WriteTo() [WIP]

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

pkg/ceph/config.go

@@ -1,6 +1,7 @@
 package ceph
 
 import (
+	"bytes"
 	"io"
 	"net/netip"
 
@@ -14,6 +15,13 @@ type Config struct {
 	Global GlobalConfig `ini:"global"`
 }
 
+// WriteTo writes a Wireguard [Config] onto the provided [io.Writer]
+func (*Config) WriteTo(w io.Writer) (int64, error) {
+	var buf bytes.Buffer
+
+	return buf.WriteTo(w)
+}
+
 // GlobalConfig represents the [global] section of a ceph.conf file
 type GlobalConfig struct {
 	FSID           uuid.UUID    `ini:"fsid"`

pkg/zones/ceph.go

@@ -18,6 +18,18 @@ func (m *Zones) GetCephConfig() (*ceph.Config, error) {
 	return ceph.NewConfigFromReader(r)
 }
 
+// WriteCephConfig writes the ceph.conf file
+func (m *Zones) WriteCephConfig(cfg *ceph.Config) error {
+	f, err := m.CreateTruncFile("ceph.conf")
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	_, err = cfg.WriteTo(f)
+	return err
+}
+
 // GetCephMonitors returns the set of Ceph monitors on
 // the zone
 func (z *Zone) GetCephMonitors() Machines {