forked from appstash/enforcer
/
serf.go
151 lines (130 loc) · 3.58 KB
/
serf.go
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package main
import (
"encoding/json"
"flag"
"fmt"
r "github.com/dancannon/gorethink"
"github.com/hashicorp/serf/client"
// "github.com/ryanuber/columnize"
"log"
"net"
"strings"
)
var (
debug bool
tableMembers = "network12"
)
// RPCAddrFlag returns a pointer to a string that will be populated
// when the given flagset is parsed with the RPC address of the Serf.
func RPCAddrFlag(f *flag.FlagSet) *string {
return f.String("rpc-addr", "127.0.0.1:7373",
"RPC address of the Serf agent")
}
// RPCClient returns a new Serf RPC client with the given address.
func RPCClient(addr string) (*client.RPCClient, error) {
return client.NewRPCClient(addr)
}
// Format some raw data for output. For better or worse, this currently forces
// the passed data object to implement fmt.Stringer, since it's pretty hard to
// implement a canonical *-to-string function.
func formatOutput(data interface{}) ([]byte, error) {
var out string
jsonout, err := json.MarshalIndent(data.(fmt.Stringer), "", " ")
if err != nil {
return nil, err
}
out = string(jsonout)
return []byte(prepareOutput(out)), nil
}
// Apply some final formatting to make sure we don't end up with extra newlines
func prepareOutput(in string) string {
return strings.TrimSpace(string(in))
}
// A container of member details. Maintaining a command-specific struct here
// makes sense so that the agent.Member struct can evolve without changing the
// keys in the output interface.
type Member struct {
Name string `json:"name"`
Addr string `json:"addr"`
Port uint16 `json:"port"`
Tags map[string]string `json:"tags"`
Status string `json:"status"`
Proto map[string]uint8 `json:"protocol"`
}
func listMembers(
Name string,
Addr string,
Status string,
) *Member {
return &Member{
Name: Name,
Addr: Addr,
Status: Status,
}
}
type MemberContainer struct {
Members []Member `json:"members"`
}
/*func (c MemberContainer) String() string {
var result []string
for _, member := range c.Members {
// Format the tags as tag1=v1,tag2=v2,...
var tagPairs []string
for name, value := range member.Tags {
tagPairs = append(tagPairs, fmt.Sprintf("%s=%s", name, value))
}
tags := strings.Join(tagPairs, ",")
line := fmt.Sprintf("%s|%s|%s|%s",
member.Name, member.Addr, member.Status, tags)
result = append(result, line)
}
output, _ := columnize.SimpleFormat(result)
return output
}
*/
func getAllMembers() {
addr := "127.0.0.1:7373"
client, err := RPCClient(addr)
//client, err := RPCClient(*rpcAddr)
if err != nil {
fmt.Sprintf("Error connecting to Serf agent: %s", err)
return
}
defer client.Close()
members, err := client.Members()
if err != nil {
if debug {
log.Println("Error retrieving members: %s", err)
}
return
}
//fmt.Println(members)
result := MemberContainer{}
for _, member := range members {
addr := net.TCPAddr{IP: member.Addr, Port: int(member.Port)}
result.Members = append(result.Members, Member{
Name: member.Name,
Addr: addr.String(),
Port: member.Port,
Tags: member.Tags,
Status: member.Status,
Proto: map[string]uint8{
"min": member.DelegateMin,
"max": member.DelegateMax,
"version": member.DelegateCur,
},
})
}
r.Db("enforcer_db").TableDrop(tableMembers).Run(session)
var tables []string
tables = append(tables, tableMembers)
createTable(tables, debug)
// Insert the new item into the database
_, err = r.Table(tableMembers).Insert(result.Members).RunWrite(session)
if err != nil {
if debug {
log.Println("Error inserting data in rethindkdb", err)
}
return
}
}