zones: introduce GenCephConfig()

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

pkg/zones/ceph.go

@@ -2,6 +2,7 @@ package zones
 
 import (
 	"bytes"
+	"net/netip"
 	"sort"
 
 	"darvaza.org/core"
@@ -30,6 +31,36 @@ func (m *Zones) GetCephConfig() (*ceph.Config, error) {
 	return ceph.NewConfigFromReader(r)
 }
 
+// GenCephConfig prepares a ceph.Config using the cluster information
+func (m *Zones) GenCephConfig() (*ceph.Config, error) {
+	fsid, err := m.GetCephFSID()
+	if err != nil {
+		return nil, err
+	}
+
+	cfg := &ceph.Config{
+		Global: ceph.GlobalConfig{
+			FSID: fsid,
+			ClusterNetwork: netip.PrefixFrom(
+				netip.AddrFrom4([4]byte{10, 0, 0, 0}),
+				8,
+			),
+		},
+	}
+
+	m.ForEachZone(func(z *Zone) bool {
+		for _, p := range z.GetCephMonitors() {
+			addr, _ := RingOneAddress(z.ID, p.ID)
+
+			cfg.Global.Monitors = append(cfg.Global.Monitors, p.Name)
+			cfg.Global.MonitorsAddr = append(cfg.Global.MonitorsAddr, addr)
+		}
+		return false
+	})
+
+	return cfg, nil
+}
+
 // GetCephMonitors returns the set of Ceph monitors on
 // the zone
 func (z *Zone) GetCephMonitors() Machines {