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package zones
import (
"bytes"
"fmt"
"io"
"strings"
)
// Env is a shell environment factory for this cluster
type Env struct {
ZoneIterator
export bool
}
// Env returns a shell environment factory
func (m *Zones) Env(export bool) *Env {
return &Env{
ZoneIterator: m,
export: export,
}
}
// Zones returns the list of Zone IDs
func (m *Env) Zones() []int {
var zones []int
m.ForEachZone(func(z *Zone) bool {
zones = append(zones, z.ID)
return false
})
return zones
}
// WriteTo generates environment variables for shell scripts
func (m *Env) WriteTo(w io.Writer) (int64, error) {
var buf bytes.Buffer
m.writeEnvVarInts(&buf, m.Zones(), "ZONES")
m.ForEachZone(func(z *Zone) bool {
m.writeEnvZone(&buf, z)
return false
})
return buf.WriteTo(w)
}
func (m *Env) writeEnvZone(w io.Writer, z *Zone) {
zoneID := z.ID
// ZONE{zoneID}
m.writeEnvVar(w, genEnvZoneNodes(z), "ZONE%v", zoneID)
// ZONE{zoneID}_NAME
m.writeEnvVar(w, z.Name, "ZONE%v_%s", zoneID, "NAME")
// ZONE{zoneID}_GW
gateways, _ := z.GatewayIDs()
m.writeEnvVarInts(w, gateways, "ZONE%v_%s", zoneID, "GW")
// Ceph
monitors := z.GetCephMonitors()
// MON{zoneID}_NAME
m.writeEnvVar(w, genEnvZoneCephMonNames(monitors), "MON%v_%s", zoneID, "NAME")
// MON{zoneID}_IP
m.writeEnvVar(w, genEnvZoneCephMonIPs(monitors), "MON%v_%s", zoneID, "IP")
// MON{zoneID}_ID
m.writeEnvVar(w, genEnvZoneCephMonIDs(monitors), "MON%v_%s", zoneID, "ID")
}
func (m *Env) writeEnvVarInts(w io.Writer, value []int, name string, args ...any) {
var s string
if n := len(value); n > 0 {
var buf bytes.Buffer
for i, v := range value {
if i != 0 {
_, _ = fmt.Fprint(&buf, " ")
}
_, _ = fmt.Fprintf(&buf, "%v", v)
}
s = buf.String()
}
m.writeEnvVar(w, s, name, args...)
}
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)
_, _ = fmt.Fprintf(w, "%s%s=%q\n", prefix, name, value)
}
}
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 strings.Join(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, _ := RingOneAddress(p.Zone(), p.ID)
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()
}