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mysql_replica.go
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mysql_replica.go
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package images
import (
"fmt"
"time"
g "github.com/onsi/ginkgo"
o "github.com/onsi/gomega"
exutil "github.com/openshift/origin/test/extended/util"
"github.com/openshift/origin/test/extended/util/db"
testutil "github.com/openshift/origin/test/util"
kapi "k8s.io/kubernetes/pkg/api"
kclient "k8s.io/kubernetes/pkg/client/unversioned"
)
type testCase struct {
Version string
TemplatePath string
SkipReplication bool
}
var (
testCases = []testCase{
{
"5.5",
"https://raw.githubusercontent.com/openshift/mysql/master/5.5/examples/replica/mysql_replica.json",
// TODO: Investigate why this is broken.
true,
},
{
"5.6",
"https://raw.githubusercontent.com/openshift/mysql/master/5.6/examples/replica/mysql_replica.json",
false,
},
}
helperTemplate = exutil.FixturePath("..", "..", "examples", "db-templates", "mysql-ephemeral-template.json")
helperName = "mysql-helper"
)
// CreateMySQLReplicationHelpers creates a set of MySQL helpers for master,
// slave and an extra helper that is used for remote login test.
func CreateMySQLReplicationHelpers(c kclient.PodInterface, masterDeployment, slaveDeployment, helperDeployment string, slaveCount int) (exutil.Database, []exutil.Database, exutil.Database) {
podNames, err := exutil.WaitForPods(c, exutil.ParseLabelsOrDie(fmt.Sprintf("deployment=%s", masterDeployment)), exutil.CheckPodIsRunningFn, 1, 1*time.Minute)
o.Expect(err).NotTo(o.HaveOccurred())
masterPod := podNames[0]
slavePods, err := exutil.WaitForPods(c, exutil.ParseLabelsOrDie(fmt.Sprintf("deployment=%s", slaveDeployment)), exutil.CheckPodIsRunningFn, slaveCount, 2*time.Minute)
o.Expect(err).NotTo(o.HaveOccurred())
// Create MySQL helper for master
master := db.NewMysql(masterPod, "")
// Create MySQL helpers for slaves
slaves := make([]exutil.Database, len(slavePods))
for i := range slavePods {
slave := db.NewMysql(slavePods[i], masterPod)
slaves[i] = slave
}
helperNames, err := exutil.WaitForPods(c, exutil.ParseLabelsOrDie(fmt.Sprintf("deployment=%s", helperDeployment)), exutil.CheckPodIsRunningFn, 1, 1*time.Minute)
o.Expect(err).NotTo(o.HaveOccurred())
helper := db.NewMysql(helperNames[0], masterPod)
return master, slaves, helper
}
func cleanup(oc *exutil.CLI) {
oc.AsAdmin().Run("delete").Args("all", "--all", "-n", oc.Namespace()).Execute()
oc.AsAdmin().Run("delete").Args("pvc", "--all", "-n", oc.Namespace()).Execute()
exutil.CleanupHostPathVolumes(oc.AdminKubeREST().PersistentVolumes(), oc.Namespace())
}
func replicationTestFactory(oc *exutil.CLI, tc testCase) func() {
return func() {
oc.SetOutputDir(exutil.TestContext.OutputDir)
defer cleanup(oc)
_, err := exutil.SetupHostPathVolumes(oc.AdminKubeREST().PersistentVolumes(), oc.Namespace(), "512Mi", 1)
o.Expect(err).NotTo(o.HaveOccurred())
err = testutil.WaitForPolicyUpdate(oc.REST(), oc.Namespace(), "create", "templates", true)
o.Expect(err).NotTo(o.HaveOccurred())
err = oc.Run("new-app").Args("-f", tc.TemplatePath).Execute()
o.Expect(err).NotTo(o.HaveOccurred())
err = oc.Run("new-app").Args("-f", helperTemplate, "-p", fmt.Sprintf("DATABASE_SERVICE_NAME=%s", helperName)).Execute()
o.Expect(err).NotTo(o.HaveOccurred())
err = oc.KubeFramework().WaitForAnEndpoint(helperName)
o.Expect(err).NotTo(o.HaveOccurred())
tableCounter := 0
assertReplicationIsWorking := func(masterDeployment, slaveDeployment string, slaveCount int) (exutil.Database, []exutil.Database, exutil.Database) {
tableCounter++
table := fmt.Sprintf("table_%0.2d", tableCounter)
master, slaves, helper := CreateMySQLReplicationHelpers(oc.KubeREST().Pods(oc.Namespace()), masterDeployment, slaveDeployment, fmt.Sprintf("%s-1", helperName), slaveCount)
o.Expect(exutil.WaitUntilAllHelpersAreUp(oc, []exutil.Database{master, helper})).NotTo(o.HaveOccurred())
o.Expect(exutil.WaitUntilAllHelpersAreUp(oc, slaves)).NotTo(o.HaveOccurred())
// Test if we can query as root
oc.KubeFramework().WaitForAnEndpoint("mysql-master")
err := helper.TestRemoteLogin(oc, "mysql-master")
o.Expect(err).NotTo(o.HaveOccurred())
// Create a new table with random name
_, err = master.Query(oc, fmt.Sprintf("CREATE TABLE %s (col1 VARCHAR(20), col2 VARCHAR(20));", table))
o.Expect(err).NotTo(o.HaveOccurred())
// Write new data to the table through master
_, err = master.Query(oc, fmt.Sprintf("INSERT INTO %s (col1, col2) VALUES ('val1', 'val2');", table))
o.Expect(err).NotTo(o.HaveOccurred())
// Make sure data is present on master
err = exutil.WaitForQueryOutput(oc, master, 10*time.Second, false, fmt.Sprintf("SELECT * FROM %s\\G;", table), "col1: val1\ncol2: val2")
o.Expect(err).NotTo(o.HaveOccurred())
// Make sure data was replicated to all slaves
for _, slave := range slaves {
err = exutil.WaitForQueryOutput(oc, slave, 90*time.Second, false, fmt.Sprintf("SELECT * FROM %s\\G;", table), "col1: val1\ncol2: val2")
o.Expect(err).NotTo(o.HaveOccurred())
}
return master, slaves, helper
}
g.By("after initial deployment")
master, _, _ := assertReplicationIsWorking("mysql-master-1", "mysql-slave-1", 1)
if tc.SkipReplication {
return
}
g.By("after master is restarted by changing the Deployment Config")
err = oc.Run("env").Args("dc", "mysql-master", "MYSQL_ROOT_PASSWORD=newpass").Execute()
o.Expect(err).NotTo(o.HaveOccurred())
err = exutil.WaitUntilPodIsGone(oc.KubeREST().Pods(oc.Namespace()), master.PodName(), 1*time.Minute)
master, _, _ = assertReplicationIsWorking("mysql-master-2", "mysql-slave-1", 1)
g.By("after master is restarted by deleting the pod")
err = oc.Run("delete").Args("pod", "-l", "deployment=mysql-master-2").Execute()
o.Expect(err).NotTo(o.HaveOccurred())
err = exutil.WaitUntilPodIsGone(oc.KubeREST().Pods(oc.Namespace()), master.PodName(), 1*time.Minute)
o.Expect(err).NotTo(o.HaveOccurred())
_, slaves, _ := assertReplicationIsWorking("mysql-master-2", "mysql-slave-1", 1)
g.By("after slave is restarted by deleting the pod")
err = oc.Run("delete").Args("pod", "-l", "deployment=mysql-slave-1").Execute()
o.Expect(err).NotTo(o.HaveOccurred())
err = exutil.WaitUntilPodIsGone(oc.KubeREST().Pods(oc.Namespace()), slaves[0].PodName(), 1*time.Minute)
o.Expect(err).NotTo(o.HaveOccurred())
assertReplicationIsWorking("mysql-master-2", "mysql-slave-1", 1)
pods, err := oc.KubeREST().Pods(oc.Namespace()).List(kapi.ListOptions{LabelSelector: exutil.ParseLabelsOrDie("deployment=mysql-slave-1")})
o.Expect(err).NotTo(o.HaveOccurred())
o.Expect(len(pods.Items)).To(o.Equal(1))
g.By("after slave is scaled to 0 and then back to 4 replicas")
err = oc.Run("scale").Args("dc", "mysql-slave", "--replicas=0").Execute()
o.Expect(err).NotTo(o.HaveOccurred())
err = exutil.WaitUntilPodIsGone(oc.KubeREST().Pods(oc.Namespace()), pods.Items[0].Name, 1*time.Minute)
o.Expect(err).NotTo(o.HaveOccurred())
err = oc.Run("scale").Args("dc", "mysql-slave", "--replicas=4").Execute()
o.Expect(err).NotTo(o.HaveOccurred())
assertReplicationIsWorking("mysql-master-2", "mysql-slave-1", 4)
}
}
var _ = g.Describe("[images][mysql][Slow] openshift mysql replication", func() {
defer g.GinkgoRecover()
ocs := make([]*exutil.CLI, len(testCases))
for i, tc := range testCases {
ocs[i] = exutil.NewCLI(fmt.Sprintf("mysql-replication-%d", i), exutil.KubeConfigPath())
g.It(fmt.Sprintf("MySQL replication template for %s: %s", tc.Version, tc.TemplatePath), replicationTestFactory(ocs[i], tc))
}
})