275 lines
8.1 KiB
Go
275 lines
8.1 KiB
Go
package consultemplate
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import (
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"fmt"
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"os"
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"strings"
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"time"
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capi "github.com/hashicorp/consul/api"
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e2e "github.com/hashicorp/nomad/e2e/e2eutil"
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"github.com/hashicorp/nomad/e2e/framework"
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"github.com/hashicorp/nomad/helper/uuid"
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"github.com/hashicorp/nomad/jobspec"
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"github.com/hashicorp/nomad/testutil"
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)
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const ns = ""
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type ConsulTemplateTest struct {
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framework.TC
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jobIDs []string
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consulKeys []string
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}
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func init() {
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framework.AddSuites(&framework.TestSuite{
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Component: "ConsulTemplate",
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CanRunLocal: true,
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Consul: true,
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Cases: []framework.TestCase{
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new(ConsulTemplateTest),
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},
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})
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}
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func (tc *ConsulTemplateTest) BeforeAll(f *framework.F) {
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e2e.WaitForLeader(f.T(), tc.Nomad())
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e2e.WaitForNodesReady(f.T(), tc.Nomad(), 1)
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}
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func (tc *ConsulTemplateTest) AfterEach(f *framework.F) {
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if os.Getenv("NOMAD_TEST_SKIPCLEANUP") == "1" {
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return
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}
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for _, id := range tc.jobIDs {
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_, err := e2e.Command("nomad", "job", "stop", "-purge", id)
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f.Assert().NoError(err, "could not clean up job", id)
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}
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tc.jobIDs = []string{}
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for _, key := range tc.consulKeys {
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_, err := tc.Consul().KV().Delete(key, nil)
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f.Assert().NoError(err, "could not clean up consul key", key)
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}
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tc.consulKeys = []string{}
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_, err := e2e.Command("nomad", "system", "gc")
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f.NoError(err)
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}
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// TestTemplateUpdateTriggers exercises consul-template integration, verifying that:
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// - missing keys block allocations from starting
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// - key updates trigger re-render
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// - service updates trigger re-render
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// - 'noop' vs ''restart' configuration
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func (tc *ConsulTemplateTest) TestTemplateUpdateTriggers(f *framework.F) {
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wc := &e2e.WaitConfig{}
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interval, retries := wc.OrDefault()
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key := "consultemplate-" + uuid.Generate()[:8]
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jobID := key
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replacement := fmt.Sprintf(`---
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key: {{ key "%s" }}
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job: {{ env "NOMAD_JOB_NAME" }}
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`, key)
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// Ensure consul key does not exist
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_, err := tc.Consul().KV().Delete(key, nil)
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f.NoError(err)
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// Parse job so we can replace the template stanza with isolated keys
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job, err := jobspec.ParseFile("consultemplate/input/templating.nomad")
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f.NoError(err)
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job.ID = &jobID
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job.TaskGroups[0].Tasks[0].Templates[1].EmbeddedTmpl = &replacement
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job.TaskGroups[1].Tasks[0].Templates[1].EmbeddedTmpl = &replacement
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tc.jobIDs = append(tc.jobIDs, jobID)
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_, _, err = tc.Nomad().Jobs().Register(job, nil)
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f.NoError(err, "could not register job")
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expected := map[string]string{
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"upstream": "running",
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"exec_downstream": "pending",
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"docker_downstream": "pending"}
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f.NoError(waitForAllocStatusByGroup(jobID, ns, expected, nil))
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// We won't reschedule any of these allocs, so we can cache these IDs for later
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downstreams := map[string]string{} // alloc ID -> group name
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allocs, err := e2e.AllocsForJob(jobID, ns)
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f.NoError(err)
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for _, alloc := range allocs {
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group := alloc["Task Group"]
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if group == "docker_downstream" || group == "exec_downstream" {
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downstreams[alloc["ID"]] = group
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}
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}
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// note: checking pending above doesn't tell us whether we've tried to render
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// the template yet, so we still need to poll for the template event
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for allocID, group := range downstreams {
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var checkErr error
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testutil.WaitForResultRetries(retries, func() (bool, error) {
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time.Sleep(interval)
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out, err := e2e.Command("nomad", "alloc", "status", allocID)
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f.NoError(err, "could not get allocation status")
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return strings.Contains(out, "Missing: kv.block"),
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fmt.Errorf("expected %q to be blocked on Consul key", group)
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}, func(e error) {
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checkErr = e
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})
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f.NoError(checkErr)
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}
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// Write our key to Consul
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_, err = tc.Consul().KV().Put(&capi.KVPair{Key: key, Value: []byte("foo")}, nil)
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f.NoError(err)
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tc.consulKeys = append(tc.consulKeys, key)
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// template will render, allowing downstream allocs to run
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expected = map[string]string{
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"upstream": "running",
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"exec_downstream": "running",
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"docker_downstream": "running"}
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f.NoError(waitForAllocStatusByGroup(jobID, ns, expected, nil))
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// verify we've rendered the templates
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for allocID := range downstreams {
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f.NoError(waitForTemplateRender(allocID, "task/local/kv.yml",
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func(out string) bool {
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return strings.TrimSpace(out) == "---\nkey: foo\njob: templating"
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}, nil), "expected consul key to be rendered")
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f.NoError(waitForTemplateRender(allocID, "task/local/services.conf",
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func(out string) bool {
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confLines := strings.Split(strings.TrimSpace(out), "\n")
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servers := 0
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for _, line := range confLines {
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if strings.HasPrefix(line, "server upstream-service ") {
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servers++
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}
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}
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return servers == 2
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}, nil), "expected 2 upstream servers")
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}
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// Update our key in Consul
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_, err = tc.Consul().KV().Put(&capi.KVPair{Key: key, Value: []byte("bar")}, nil)
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f.NoError(err)
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// Wait for restart
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for allocID, group := range downstreams {
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var checkErr error
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testutil.WaitForResultRetries(retries, func() (bool, error) {
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time.Sleep(interval)
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out, err := e2e.Command("nomad", "alloc", "status", allocID)
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f.NoError(err, "could not get allocation status")
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section, err := e2e.GetSection(out, "Task Events:")
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f.NoError(err, out)
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restarts, err := e2e.GetField(section, "Total Restarts")
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f.NoError(err)
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return restarts == "1",
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fmt.Errorf("expected 1 restart for %q but found %s", group, restarts)
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}, func(e error) {
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checkErr = e
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})
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f.NoError(checkErr)
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// verify we've re-rendered the template
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f.NoError(waitForTemplateRender(allocID, "task/local/kv.yml",
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func(out string) bool {
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return strings.TrimSpace(out) == "---\nkey: bar\njob: templating"
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}, nil), "expected updated consul key")
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}
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// increase the count for upstreams
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count := 3
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job.TaskGroups[2].Count = &count
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_, _, err = tc.Nomad().Jobs().Register(job, nil)
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f.NoError(err, "could not register job")
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// wait for re-rendering
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for allocID := range downstreams {
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f.NoError(waitForTemplateRender(allocID, "task/local/services.conf",
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func(out string) bool {
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confLines := strings.Split(strings.TrimSpace(out), "\n")
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servers := 0
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for _, line := range confLines {
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if strings.HasPrefix(line, "server upstream-service ") {
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servers++
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}
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}
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return servers == 3
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}, nil), "expected 3 upstream servers")
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// verify noop was honored: no additional restarts
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out, err := e2e.Command("nomad", "alloc", "status", allocID)
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f.NoError(err, "could not get allocation status")
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section, err := e2e.GetSection(out, "Task Events:")
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f.NoError(err, out)
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restarts, err := e2e.GetField(section, "Total Restarts")
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f.NoError(err)
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f.Equal("1", restarts, "expected no new restarts for group")
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}
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}
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// waitForTemplateRender is a helper that grabs a file via alloc fs
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// and tests it for
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func waitForTemplateRender(allocID, path string, test func(string) bool, wc *e2e.WaitConfig) error {
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var err error
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var out string
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interval, retries := wc.OrDefault()
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testutil.WaitForResultRetries(retries, func() (bool, error) {
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time.Sleep(interval)
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out, err = e2e.Command("nomad", "alloc", "fs", allocID, path)
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if err != nil {
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return false, fmt.Errorf("could not get file %q from allocation %q: %v",
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path, allocID, err)
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}
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return test(out), nil
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}, func(e error) {
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err = fmt.Errorf("test for file content failed: got %#v\nerror: %v", out, e)
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})
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return err
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}
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// waitForAllocStatusByGroup is similar to WaitForAllocStatus but maps
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// specific task group names to statuses without having to deal with specific counts
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func waitForAllocStatusByGroup(jobID, ns string, expected map[string]string, wc *e2e.WaitConfig) error {
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var got []map[string]string
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var err error
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interval, retries := wc.OrDefault()
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testutil.WaitForResultRetries(retries, func() (bool, error) {
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time.Sleep(interval)
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got, err = e2e.AllocsForJob(jobID, ns)
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if err != nil {
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return false, err
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}
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for _, row := range got {
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group := row["Task Group"]
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expectedStatus := expected[group]
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gotStatus := row["Status"]
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if expectedStatus != gotStatus {
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return false, fmt.Errorf("expected %q to be %q, got %q",
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group, expectedStatus, gotStatus)
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}
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}
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err = nil
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return true, nil
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}, func(e error) {
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err = fmt.Errorf("alloc status check failed: got %#v\nerror: %v", got, e)
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})
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return err
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}
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