mirror of https://github.com/hashicorp/consul
116 lines
3.2 KiB
Go
116 lines
3.2 KiB
Go
package metrics
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import (
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"context"
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"fmt"
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"io/ioutil"
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"net/http"
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"net/url"
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"strings"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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libcluster "github.com/hashicorp/consul/test/integration/consul-container/libs/cluster"
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"github.com/hashicorp/consul/test/integration/consul-container/libs/node"
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"github.com/hashicorp/consul/test/integration/consul-container/libs/utils"
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)
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// Given a 3-server cluster, when the leader is elected, then leader's isLeader is 1 and non-leader's 0
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func TestLeadershipMetrics(t *testing.T) {
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var configs []node.Config
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configs = append(configs,
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node.Config{
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HCL: `node_name="` + utils.RandName("consul-server") + `"
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log_level="DEBUG"
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server=true
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telemetry {
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statsite_address = "127.0.0.1:2180"
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}`,
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Cmd: []string{"agent", "-client=0.0.0.0"},
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Version: *utils.TargetVersion,
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Image: *utils.TargetImage,
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})
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numServer := 3
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for i := 1; i < numServer; i++ {
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configs = append(configs,
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node.Config{
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HCL: `node_name="` + utils.RandName("consul-server") + `"
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log_level="DEBUG"
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bootstrap_expect=3
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server=true`,
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Cmd: []string{"agent", "-client=0.0.0.0"},
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Version: *utils.TargetVersion,
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Image: *utils.TargetImage,
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})
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}
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cluster, err := libcluster.New(configs)
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require.NoError(t, err)
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defer terminate(t, cluster)
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svrCli := cluster.Nodes[0].GetClient()
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libcluster.WaitForLeader(t, cluster, svrCli)
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libcluster.WaitForMembers(t, svrCli, 3)
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retryWithBackoff := func(agentNode node.Node, expectedStr string) error {
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waiter := &utils.Waiter{
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MaxWait: 5 * time.Minute,
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}
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_, port := agentNode.GetAddr()
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ctx := context.Background()
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for {
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if waiter.Failures() > 5 {
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return fmt.Errorf("reach max failure: %d", waiter.Failures())
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}
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metricsStr, err := getMetrics(t, "127.0.0.1", port, "/v1/agent/metrics")
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if err != nil {
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return fmt.Errorf("error get metrics: %v", err)
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}
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if strings.Contains(metricsStr, expectedStr) {
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return nil
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}
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waiter.Wait(ctx)
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}
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}
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leaderNode, err := cluster.Leader()
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require.NoError(t, err)
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leadAddr, leaderPort := leaderNode.GetAddr()
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for i, n := range cluster.Nodes {
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addr, port := n.GetAddr()
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if addr == leadAddr && port == leaderPort {
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err = retryWithBackoff(leaderNode, ".server.isLeader\",\"Value\":1,")
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require.NoError(t, err, "%dth node(leader): could not find the metric %q in the /v1/agent/metrics response", i, ".server.isLeader\",\"Value\":1,")
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} else {
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err = retryWithBackoff(n, ".server.isLeader\",\"Value\":0,")
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require.NoError(t, err, "%dth node(non-leader): could not find the metric %q in the /v1/agent/metrics response", i, ".server.isLeader\",\"Value\":0,")
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}
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}
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}
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func getMetrics(t *testing.T, addr string, port int, path string) (string, error) {
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u, err := url.Parse(fmt.Sprintf("http://%s:%d", addr, port))
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require.NoError(t, err)
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u.Path = path
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resp, err := http.Get(u.String())
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if err != nil {
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return "", fmt.Errorf("error get metrics: %v", err)
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}
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return "nil", fmt.Errorf("error read metrics: %v", err)
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}
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return string(body), nil
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}
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func terminate(t *testing.T, cluster *libcluster.Cluster) {
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err := cluster.Terminate()
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require.NoError(t, err)
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}
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