c4a34602b6
* Allow forwarding of some status RPCs * Update docs * add comments about not using the regular forward
76 lines
2.1 KiB
Go
76 lines
2.1 KiB
Go
package consul
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import (
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"fmt"
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"strconv"
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"github.com/hashicorp/consul/agent/consul/autopilot"
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"github.com/hashicorp/consul/agent/structs"
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)
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// Status endpoint is used to check on server status
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type Status struct {
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server *Server
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}
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// Ping is used to just check for connectivity
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func (s *Status) Ping(args struct{}, reply *struct{}) error {
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return nil
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}
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// Leader is used to get the address of the leader
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func (s *Status) Leader(args *structs.DCSpecificRequest, reply *string) error {
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// not using the regular forward function as it does a bunch of stuff we
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// dont want like verifying consistency etc. We just want to enable DC
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// forwarding
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if args.Datacenter != "" && args.Datacenter != s.server.config.Datacenter {
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return s.server.forwardDC("Status.Leader", args.Datacenter, args, reply)
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}
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leader := string(s.server.raft.Leader())
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if leader != "" {
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*reply = leader
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} else {
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*reply = ""
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}
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return nil
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}
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// Peers is used to get all the Raft peers
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func (s *Status) Peers(args *structs.DCSpecificRequest, reply *[]string) error {
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// not using the regular forward function as it does a bunch of stuff we
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// dont want like verifying consistency etc. We just want to enable DC
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// forwarding
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if args.Datacenter != "" && args.Datacenter != s.server.config.Datacenter {
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return s.server.forwardDC("Status.Peers", args.Datacenter, args, reply)
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}
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future := s.server.raft.GetConfiguration()
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if err := future.Error(); err != nil {
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return err
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}
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for _, server := range future.Configuration().Servers {
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*reply = append(*reply, string(server.Address))
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}
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return nil
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}
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// Used by Autopilot to query the raft stats of the local server.
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func (s *Status) RaftStats(args struct{}, reply *autopilot.ServerStats) error {
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stats := s.server.raft.Stats()
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var err error
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reply.LastContact = stats["last_contact"]
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reply.LastIndex, err = strconv.ParseUint(stats["last_log_index"], 10, 64)
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if err != nil {
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return fmt.Errorf("error parsing server's last_log_index value: %s", err)
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}
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reply.LastTerm, err = strconv.ParseUint(stats["last_log_term"], 10, 64)
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if err != nil {
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return fmt.Errorf("error parsing server's last_log_term value: %s", err)
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}
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return nil
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}
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