141 lines
3 KiB
Go
141 lines
3 KiB
Go
// 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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package agent
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import (
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"fmt"
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"net"
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"regexp"
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"strconv"
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"github.com/hashicorp/go-version"
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"github.com/hashicorp/serf/serf"
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)
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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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name string
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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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return k.name == x.name
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}
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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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Name string
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ID string
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Datacenter string
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Port 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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}
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// Key returns the corresponding Key
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func (s *Server) Key() *Key {
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return &Key{
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name: s.Name,
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}
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}
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// String returns a string representation of Server
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func (s *Server) String() string {
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var addrStr, networkStr string
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if s.Addr != nil {
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addrStr = s.Addr.String()
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networkStr = s.Addr.Network()
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}
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return fmt.Sprintf("%s (Addr: %s/%s) (DC: %s)", s.Name, networkStr, addrStr, s.Datacenter)
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}
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var versionFormat = regexp.MustCompile(`\d+\.\d+\.\d+`)
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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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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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_, bootstrap := m.Tags["bootstrap"]
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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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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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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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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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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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}
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_, nonVoter := m.Tags["nonvoter"]
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addr := &net.TCPAddr{IP: m.Addr, Port: port}
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parts := &Server{
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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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Port: port,
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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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}
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return true, parts
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}
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