2016-03-30 00:39:19 +00:00
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// Package agent provides a logical endpoint for Consul agents in the
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// network. agent data originates from Serf gossip and is primarily used to
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// communicate Consul server information. Gossiped information that ends up
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// in Server contains the necessary metadata required for servers.Manager to
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// select which server an RPC request should be routed to.
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2017-07-06 10:48:37 +00:00
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package metadata
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2016-02-20 01:26:45 +00:00
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import (
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"fmt"
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"net"
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2017-03-21 23:36:44 +00:00
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"regexp"
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2016-02-20 01:26:45 +00:00
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"strconv"
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2017-08-14 14:36:07 +00:00
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"strings"
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2016-02-20 01:26:45 +00:00
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2017-03-21 23:36:44 +00:00
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"github.com/hashicorp/go-version"
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2016-02-20 01:26:45 +00:00
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"github.com/hashicorp/serf/serf"
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)
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2016-03-27 00:58:12 +00:00
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// Key is used in maps and for equality tests. A key is based on endpoints.
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type Key struct {
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2016-03-28 19:53:19 +00:00
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name string
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2016-03-27 00:58:12 +00:00
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}
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// Equal compares two Key objects
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func (k *Key) Equal(x *Key) bool {
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2016-03-28 19:53:19 +00:00
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return k.name == x.name
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2016-03-27 00:58:12 +00:00
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}
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2016-03-30 00:39:19 +00:00
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// Server is used to return details of a consul server
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type Server struct {
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2017-08-14 14:36:07 +00:00
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Name string
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ID string
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Datacenter string
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Segment string
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Port int
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2017-08-30 01:27:47 +00:00
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SegmentAddrs map[string]string
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2017-08-14 14:36:07 +00:00
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SegmentPorts map[string]int
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WanJoinPort int
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Bootstrap bool
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Expect int
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Build version.Version
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Version int
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RaftVersion int
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NonVoter bool
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Addr net.Addr
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Status serf.MemberStatus
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2017-05-10 21:25:48 +00:00
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// If true, use TLS when connecting to this server
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UseTLS bool
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2016-02-20 01:26:45 +00:00
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}
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2016-03-27 00:58:12 +00:00
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// Key returns the corresponding Key
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2016-03-30 00:39:19 +00:00
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func (s *Server) Key() *Key {
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2016-03-27 00:58:12 +00:00
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return &Key{
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2016-03-28 19:53:19 +00:00
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name: s.Name,
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2016-03-27 00:58:12 +00:00
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}
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}
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2016-03-30 00:39:19 +00:00
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// String returns a string representation of Server
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func (s *Server) String() string {
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2016-03-27 08:32:04 +00:00
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var addrStr, networkStr string
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2016-03-27 02:30:04 +00:00
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if s.Addr != nil {
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2016-03-27 08:32:04 +00:00
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addrStr = s.Addr.String()
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networkStr = s.Addr.Network()
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2016-03-27 02:30:04 +00:00
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}
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2016-03-28 18:37:25 +00:00
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return fmt.Sprintf("%s (Addr: %s/%s) (DC: %s)", s.Name, networkStr, addrStr, s.Datacenter)
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2016-02-20 01:26:45 +00:00
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}
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2017-03-21 23:36:44 +00:00
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var versionFormat = regexp.MustCompile(`\d+\.\d+\.\d+`)
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2016-03-30 00:39:19 +00:00
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// IsConsulServer returns true if a serf member is a consul server
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// agent. Returns a bool and a pointer to the Server.
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func IsConsulServer(m serf.Member) (bool, *Server) {
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2016-02-20 01:26:45 +00:00
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if m.Tags["role"] != "consul" {
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return false, nil
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}
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datacenter := m.Tags["dc"]
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2017-08-14 14:36:07 +00:00
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segment := m.Tags["segment"]
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2016-02-20 01:26:45 +00:00
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_, bootstrap := m.Tags["bootstrap"]
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2017-05-10 21:25:48 +00:00
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_, useTLS := m.Tags["use_tls"]
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2016-02-20 01:26:45 +00:00
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expect := 0
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expect_str, ok := m.Tags["expect"]
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var err error
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if ok {
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expect, err = strconv.Atoi(expect_str)
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if err != nil {
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return false, nil
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}
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}
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port_str := m.Tags["port"]
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port, err := strconv.Atoi(port_str)
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if err != nil {
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return false, nil
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}
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2017-08-30 01:27:47 +00:00
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segment_addrs := make(map[string]string)
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2017-08-14 14:36:07 +00:00
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segment_ports := make(map[string]int)
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for name, value := range m.Tags {
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2017-09-01 00:39:46 +00:00
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if strings.HasPrefix(name, "sl_") {
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addr, port, err := net.SplitHostPort(value)
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if err != nil {
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return false, nil
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}
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segment_port, err := strconv.Atoi(port)
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2017-08-14 14:36:07 +00:00
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if err != nil {
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return false, nil
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}
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2017-09-01 00:39:46 +00:00
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segment_name := strings.TrimPrefix(name, "sl_")
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segment_addrs[segment_name] = addr
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segment_ports[segment_name] = segment_port
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2017-08-14 14:36:07 +00:00
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}
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}
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2017-03-21 23:36:44 +00:00
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build_version, err := version.NewVersion(versionFormat.FindString(m.Tags["build"]))
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if err != nil {
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return false, nil
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}
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2017-03-15 19:26:54 +00:00
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wan_join_port := 0
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wan_join_port_str, ok := m.Tags["wan_join_port"]
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if ok {
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wan_join_port, err = strconv.Atoi(wan_join_port_str)
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if err != nil {
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return false, nil
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}
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}
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2016-02-20 01:26:45 +00:00
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vsn_str := m.Tags["vsn"]
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vsn, err := strconv.Atoi(vsn_str)
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if err != nil {
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return false, nil
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}
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2017-03-14 17:43:43 +00:00
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raft_vsn := 0
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raft_vsn_str, ok := m.Tags["raft_vsn"]
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if ok {
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raft_vsn, err = strconv.Atoi(raft_vsn_str)
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if err != nil {
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return false, nil
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}
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2017-02-22 20:53:32 +00:00
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}
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2017-03-21 23:36:44 +00:00
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_, nonVoter := m.Tags["nonvoter"]
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2016-02-20 01:26:45 +00:00
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addr := &net.TCPAddr{IP: m.Addr, Port: port}
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2016-03-30 00:39:19 +00:00
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parts := &Server{
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2017-08-14 14:36:07 +00:00
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Name: m.Name,
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ID: m.Tags["id"],
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Datacenter: datacenter,
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Segment: segment,
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Port: port,
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2017-08-30 01:27:47 +00:00
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SegmentAddrs: segment_addrs,
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2017-08-14 14:36:07 +00:00
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SegmentPorts: segment_ports,
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WanJoinPort: wan_join_port,
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Bootstrap: bootstrap,
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Expect: expect,
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Addr: addr,
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Build: *build_version,
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Version: vsn,
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RaftVersion: raft_vsn,
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Status: m.Status,
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NonVoter: nonVoter,
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UseTLS: useTLS,
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2016-02-20 01:26:45 +00:00
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}
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return true, parts
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}
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