Consul is a distributed, highly available, and data center aware solution to connect and configure applications across dynamic, distributed infrastructure.
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package command
import (
"fmt"
"github.com/hashicorp/consul/command/agent"
"github.com/hashicorp/consul/consul"
"io"
"io/ioutil"
"math/rand"
"net"
"os"
"sync/atomic"
"testing"
"time"
)
var offset uint64
func init() {
// Seed the random number generator
rand.Seed(time.Now().UnixNano())
}
type agentWrapper struct {
dir string
config *agent.Config
agent *agent.Agent
rpc *agent.AgentRPC
addr string
}
func (a *agentWrapper) Shutdown() {
a.rpc.Shutdown()
a.agent.Shutdown()
os.RemoveAll(a.dir)
}
func testAgent(t *testing.T) *agentWrapper {
l, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatalf("err: %s", err)
}
lw := agent.NewLogWriter(512)
mult := io.MultiWriter(os.Stderr, lw)
conf := nextConfig()
dir, err := ioutil.TempDir("", "agent")
if err != nil {
t.Fatalf(fmt.Sprintf("err: %v", err))
}
conf.DataDir = dir
a, err := agent.Create(conf, lw)
if err != nil {
os.RemoveAll(dir)
t.Fatalf(fmt.Sprintf("err: %v", err))
}
rpc := agent.NewAgentRPC(a, l, mult, lw)
return &agentWrapper{
dir: dir,
config: conf,
agent: a,
rpc: rpc,
addr: l.Addr().String(),
}
}
func nextConfig() *agent.Config {
idx := atomic.AddUint64(&offset, 1)
conf := agent.DefaultConfig()
conf.Bootstrap = true
conf.Datacenter = "dc1"
conf.NodeName = fmt.Sprintf("Node %d", idx)
conf.HTTPAddr = fmt.Sprintf("127.0.0.1:%d", 10000+10*idx)
conf.RPCAddr = fmt.Sprintf("127.0.0.1:%d", 10100+10*idx)
conf.SerfBindAddr = "127.0.0.1"
conf.SerfLanPort = int(10201 + 10*idx)
conf.SerfWanPort = int(10202 + 10*idx)
conf.Server = true
conf.ServerAddr = fmt.Sprintf("127.0.0.1:%d", 10300+10*idx)
cons := consul.DefaultConfig()
conf.ConsulConfig = cons
cons.SerfLANConfig.MemberlistConfig.ProbeTimeout = 100 * time.Millisecond
cons.SerfLANConfig.MemberlistConfig.ProbeInterval = 100 * time.Millisecond
cons.SerfLANConfig.MemberlistConfig.GossipInterval = 100 * time.Millisecond
cons.SerfWANConfig.MemberlistConfig.ProbeTimeout = 100 * time.Millisecond
cons.SerfWANConfig.MemberlistConfig.ProbeInterval = 100 * time.Millisecond
cons.SerfWANConfig.MemberlistConfig.GossipInterval = 100 * time.Millisecond
cons.RaftConfig.HeartbeatTimeout = 40 * time.Millisecond
cons.RaftConfig.ElectionTimeout = 40 * time.Millisecond
return conf
}