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Refactor loadbalancer config package. (#103)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package config | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "net/netip" | ||
| "slices" | ||
| "strings" | ||
|
|
||
| "github.com/metal-stack/metal-go/api/models" | ||
| "github.com/metal-stack/metal-lib/pkg/pointer" | ||
| ) | ||
|
|
||
| const ( | ||
| bgpProtocol = "bgp" | ||
| ) | ||
|
|
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| type addressPool struct { | ||
| Name string | ||
| Protocol string | ||
| AutoAssign *bool | ||
| CIDRs []string // It is assumed that only host addresses (/32 for ipv4 or /128 for ipv6) are used. | ||
| } | ||
|
|
||
| type addressPools []addressPool | ||
|
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| func newBGPAddressPool(name string) addressPool { | ||
| return addressPool{ | ||
| Name: name, | ||
| Protocol: bgpProtocol, | ||
| AutoAssign: pointer.Pointer(false), | ||
| } | ||
| } | ||
|
|
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| func (pool *addressPool) appendIP(ip *models.V1IPResponse) error { | ||
| if ip.Ipaddress == nil { | ||
| return errors.New("ip address is not set on ip") | ||
| } | ||
|
|
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| parsed, err := netip.ParseAddr(*ip.Ipaddress) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| cidr := fmt.Sprintf("%s/%d", parsed.String(), parsed.BitLen()) | ||
|
|
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| if slices.ContainsFunc(pool.CIDRs, func(elem string) bool { | ||
| return cidr == elem | ||
| }) { | ||
| return nil | ||
| } | ||
|
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| pool.CIDRs = append(pool.CIDRs, cidr) | ||
|
|
||
| return nil | ||
| } | ||
|
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| func (as addressPools) addPoolIP(poolName string, ip *models.V1IPResponse) (addressPools, error) { | ||
| idx := slices.IndexFunc(as, func(a addressPool) bool { | ||
| return a.Name == poolName | ||
| }) | ||
|
|
||
| if idx < 0 { | ||
| as = append(as, newBGPAddressPool(poolName)) | ||
| idx = 0 | ||
| } | ||
|
|
||
| err := as[idx].appendIP(ip) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| return as, nil | ||
| } | ||
|
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| func getPoolName(network string, ip *models.V1IPResponse) string { | ||
| poolType := models.V1IPBaseTypeEphemeral | ||
| if pointer.SafeDeref(ip.Type) == models.V1IPBaseTypeStatic { | ||
| poolType = models.V1IPBaseTypeStatic | ||
| } | ||
|
|
||
| return fmt.Sprintf("%s-%s", strings.ToLower(network), poolType) | ||
| } |
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