151 lines
3.6 KiB
Go
151 lines
3.6 KiB
Go
package proxycfg
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import (
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"strings"
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"github.com/hashicorp/consul/acl"
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"github.com/hashicorp/consul/agent/structs"
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)
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type UpstreamID struct {
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Type string
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Name string
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Datacenter string
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acl.EnterpriseMeta
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}
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func NewUpstreamID(u *structs.Upstream) UpstreamID {
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id := UpstreamID{
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Type: u.DestinationType,
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Name: u.DestinationName,
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Datacenter: u.Datacenter,
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EnterpriseMeta: acl.NewEnterpriseMetaWithPartition(
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u.DestinationPartition,
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u.DestinationNamespace,
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),
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}
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id.normalize()
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return id
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}
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func NewUpstreamIDFromServiceName(sn structs.ServiceName) UpstreamID {
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id := UpstreamID{
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Name: sn.Name,
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EnterpriseMeta: sn.EnterpriseMeta,
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}
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id.normalize()
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return id
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}
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func NewUpstreamIDFromServiceID(sid structs.ServiceID) UpstreamID {
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id := UpstreamID{
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Name: sid.ID,
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EnterpriseMeta: sid.EnterpriseMeta,
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}
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id.normalize()
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return id
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}
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func NewUpstreamIDFromTargetID(tid string) UpstreamID {
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// Drop the leading subset if one is present in the target ID.
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separators := strings.Count(tid, ".")
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if separators > 3 {
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prefix := tid[:strings.Index(tid, ".")+1]
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tid = strings.TrimPrefix(tid, prefix)
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}
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split := strings.SplitN(tid, ".", 4)
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id := UpstreamID{
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Name: split[0],
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EnterpriseMeta: acl.NewEnterpriseMetaWithPartition(split[2], split[1]),
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Datacenter: split[3],
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}
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id.normalize()
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return id
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}
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func (u *UpstreamID) normalize() {
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if u.Type == structs.UpstreamDestTypeService {
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u.Type = ""
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}
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u.EnterpriseMeta.Normalize()
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}
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// String encodes the UpstreamID into a string for use in agent cache keys.
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// You can decode it back again using UpstreamIDFromString.
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func (u UpstreamID) String() string {
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return UpstreamIDString(u.Type, u.Datacenter, u.Name, &u.EnterpriseMeta)
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}
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func (u UpstreamID) GoString() string {
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return u.String()
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}
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func UpstreamIDFromString(input string) UpstreamID {
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typ, dc, name, entMeta := ParseUpstreamIDString(input)
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id := UpstreamID{
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Type: typ,
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Datacenter: dc,
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Name: name,
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EnterpriseMeta: *entMeta,
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}
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id.normalize()
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return id
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}
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const upstreamTypePreparedQueryPrefix = structs.UpstreamDestTypePreparedQuery + ":"
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func ParseUpstreamIDString(input string) (typ, dc, name string, meta *acl.EnterpriseMeta) {
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if strings.HasPrefix(input, upstreamTypePreparedQueryPrefix) {
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typ = structs.UpstreamDestTypePreparedQuery
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input = strings.TrimPrefix(input, upstreamTypePreparedQueryPrefix)
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}
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idx := strings.LastIndex(input, "?dc=")
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if idx != -1 {
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dc = input[idx+4:]
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input = input[0:idx]
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}
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name, meta = parseInnerUpstreamIDString(input)
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return typ, dc, name, meta
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}
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// EnvoyID returns a string representation that uniquely identifies the
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// upstream in a canonical but human readable way.
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//
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// This should be used for any situation where we generate identifiers in Envoy
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// xDS structures for this upstream.
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//
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// This will ensure that generated identifiers for the same thing in OSS and
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// Enterprise render the same and omit default namespaces and partitions.
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func (u UpstreamID) EnvoyID() string {
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name := u.enterpriseIdentifierPrefix() + u.Name
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typ := u.Type
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if u.Datacenter != "" {
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name += "?dc=" + u.Datacenter
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}
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// Service is default type so never prefix it. This is more readable and long
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// term it is the only type that matters so we can drop the prefix and have
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// nicer naming in metrics etc.
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if typ == "" || typ == structs.UpstreamDestTypeService {
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return name
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}
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return typ + ":" + name
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}
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func UpstreamsToMap(us structs.Upstreams) map[UpstreamID]*structs.Upstream {
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upstreamMap := make(map[UpstreamID]*structs.Upstream)
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for i := range us {
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u := us[i]
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upstreamMap[NewUpstreamID(&u)] = &u
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}
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return upstreamMap
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}
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