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package cluster
import (
"bytes"
"fmt"
"io"
"strings"
"darvaza.org/core"
"git.jpi.io/amery/jpictl/pkg/rings"
)
// Env is a shell environment factory for this cluster
type Env struct {
ZoneIterator
RegionIterator
cephFSID string
export bool
}
// Env returns a shell environment factory
func (m *Cluster) Env(export bool) (*Env, error) {
fsid, err := m.GetCephFSID()
if err != nil {
return nil, err
}
env := &Env{
ZoneIterator: m,
RegionIterator: m,
cephFSID: fsid.String(),
export: export,
}
return env, nil
}
// Zones returns the list of Zone IDs of a region,
// or from all if none is specified.
func (m *Env) Zones(r *Region) []rings.ZoneID {
var zones []rings.ZoneID
iter := core.IIf[ZoneIterator](r != nil, r, m)
iter.ForEachZone(func(z *Zone) bool {
zones = append(zones, z.ID)
return false
})
core.SliceSortOrdered(zones)
return zones
}
// RegionsNames returns a sorted list of primary regions names
func (m *Env) RegionsNames() []string {
var regions []string
m.ForEachRegion(func(r *Region) bool {
if r.IsPrimary() {
regions = append(regions, r.Name)
}
return false
})
core.SliceSortOrdered(regions)
return regions
}
// Regions returns a sorted list of primary regions IDs
func (m *Env) Regions() (regions []rings.RegionID) {
m.ForEachRegion(func(r *Region) bool {
if r.IsPrimary() {
regions = append(regions, r.ID)
}
return false
})
core.SliceSortOrdered(regions)
return regions
}
// WriteTo generates environment variables for shell scripts
func (m *Env) WriteTo(w io.Writer) (int64, error) {
var buf bytes.Buffer
if m.cephFSID != "" {
m.writeEnvVar(&buf, m.cephFSID, "FSID")
}
regions := m.getRegions()
ids := core.SliceMap(regions, func(_ []rings.RegionID, r *Region) (out []rings.RegionID) {
return append(out, r.ID)
})
names := core.SliceMap(regions, func(_ []string, r *Region) (out []string) {
return append(out, r.Name)
})
m.writeEnvVar(&buf, genEnvInts(ids), "REGIONS")
m.writeEnvVar(&buf, genEnvStrings(names), "REGIONS_NAMES")
for _, r := range regions {
m.writeEnvRegion(&buf, r)
}
return buf.WriteTo(w)
}
func (m *Env) getRegions() (out []*Region) {
m.ForEachRegion(func(r *Region) bool {
if r.IsPrimary() {
out = append(out, r)
}
return false
})
core.SliceSortFn(out, func(a, b *Region) bool {
return a.ID < b.ID
})
return out
}
func (m *Env) writeEnvRegion(w io.Writer, r *Region) {
regionID := r.ID
// REGION{regionID}_NAME
m.writeEnvVar(w, r.Name, "REGION%v_%s", regionID, "NAME")
// REGION{regionID}_ZONES
m.writeEnvVar(w, genEnvInts(m.Zones(r)), "REGION%v_%s", regionID, "ZONES")
r.ForEachZone(func(z *Zone) bool {
m.writeEnvZone(w, r, z)
return false
})
}
func (m *Env) writeEnvZone(w io.Writer, r *Region, z *Zone) {
zonePrefix := fmt.Sprintf("REGION%v_ZONE%v", r.ID, z.ID)
monPrefix := zonePrefix + "_MON"
// REGION{regionID}_ZONE{zoneID}
m.writeEnvVar(w, genEnvZoneNodes(z), zonePrefix)
// REGION{regionID}_ZONE{zoneID}_NAME
m.writeEnvVar(w, z.Name, zonePrefix+"_NAME")
// REGION{regionID}_ZONE{zoneID}_GW
gateways, _ := z.GatewayIDs()
m.writeEnvVar(w, genEnvInts(gateways), zonePrefix+"_GW")
// Ceph
monitors := z.GetCephMonitors()
// REGION{regionID}_MON{zone_ID}
m.writeEnvVar(w, genEnvZoneCephMonNames(monitors), monPrefix)
// REGION{regionID}_MON{zone_ID}_IP
m.writeEnvVar(w, genEnvZoneCephMonIPs(monitors), monPrefix+"_IP")
// REGION{regionID}_MON{zone_ID}_ID
m.writeEnvVar(w, genEnvZoneCephMonIDs(monitors), monPrefix+"_ID")
}
func (m *Env) writeEnvVar(w io.Writer, value string, name string, args ...any) {
var prefix string
if m.export {
prefix = "export "
}
if len(args) > 0 {
name = fmt.Sprintf(name, args...)
}
if name != "" {
value = strings.TrimSpace(value)
if value == "" {
_, _ = fmt.Fprintf(w, "%s%s=\n", prefix, name)
} else {
_, _ = fmt.Fprintf(w, "%s%s=%q\n", prefix, name, value)
}
}
}
func genEnvInts[T core.Signed](values []T) string {
var buf bytes.Buffer
for _, v := range values {
if buf.Len() > 0 {
_, _ = buf.WriteRune(' ')
}
_, _ = buf.WriteString(fmt.Sprintf("%v", int64(v)))
}
return buf.String()
}
func genEnvStrings(values []string) string {
return strings.Join(values, " ")
}
func genEnvZoneNodes(z *Zone) string {
if n := z.Len(); n > 0 {
s := make([]string, 0, n)
z.ForEachMachine(func(p *Machine) bool {
s = append(s, p.Name)
return false
})
return genEnvStrings(s)
}
return ""
}
func genEnvZoneCephMonNames(m Machines) string {
var buf strings.Builder
m.ForEachMachine(func(p *Machine) bool {
if buf.Len() > 0 {
_, _ = buf.WriteRune(' ')
}
_, _ = buf.WriteString(p.Name)
return false
})
return buf.String()
}
func genEnvZoneCephMonIPs(m Machines) string {
var buf strings.Builder
m.ForEachMachine(func(p *Machine) bool {
addr := p.RingOneAddress()
if buf.Len() > 0 {
_, _ = buf.WriteRune(' ')
}
_, _ = buf.WriteString(addr.String())
return false
})
return buf.String()
}
func genEnvZoneCephMonIDs(m Machines) string {
var buf strings.Builder
m.ForEachMachine(func(p *Machine) bool {
if buf.Len() > 0 {
_, _ = buf.WriteRune(' ')
}
_, _ = fmt.Fprintf(&buf, "%v", p.ID)
return false
})
return buf.String()
}