forked from mirror/redis
95 lines
2.6 KiB
Go
95 lines
2.6 KiB
Go
package redis_test
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import (
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"github.com/go-redis/redis/v8"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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var _ = Describe("Sentinel", func() {
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var client *redis.Client
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BeforeEach(func() {
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client = redis.NewFailoverClient(&redis.FailoverOptions{
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MasterName: sentinelName,
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SentinelAddrs: sentinelAddrs,
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})
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Expect(client.FlushDB(ctx).Err()).NotTo(HaveOccurred())
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})
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AfterEach(func() {
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Expect(client.Close()).NotTo(HaveOccurred())
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})
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It("should facilitate failover", func() {
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// Set value on master.
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err := client.Set(ctx, "foo", "master", 0).Err()
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Expect(err).NotTo(HaveOccurred())
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// Verify.
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val, err := sentinelMaster.Get(ctx, "foo").Result()
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Expect(err).NotTo(HaveOccurred())
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Expect(val).To(Equal("master"))
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// Create subscription.
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ch := client.Subscribe(ctx, "foo").Channel()
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// Wait until replicated.
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Eventually(func() string {
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return sentinelSlave1.Get(ctx, "foo").Val()
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}, "15s", "100ms").Should(Equal("master"))
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Eventually(func() string {
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return sentinelSlave2.Get(ctx, "foo").Val()
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}, "15s", "100ms").Should(Equal("master"))
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// Wait until slaves are picked up by sentinel.
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Eventually(func() string {
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return sentinel1.Info(ctx).Val()
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}, "10s", "100ms").Should(ContainSubstring("slaves=2"))
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Eventually(func() string {
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return sentinel2.Info(ctx).Val()
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}, "10s", "100ms").Should(ContainSubstring("slaves=2"))
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Eventually(func() string {
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return sentinel3.Info(ctx).Val()
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}, "10s", "100ms").Should(ContainSubstring("slaves=2"))
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// Kill master.
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sentinelMaster.Shutdown(ctx)
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Eventually(func() error {
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return sentinelMaster.Ping(ctx).Err()
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}, "15s", "100ms").Should(HaveOccurred())
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// Wait for Redis sentinel to elect new master.
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Eventually(func() string {
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return sentinelSlave1.Info(ctx).Val() + sentinelSlave2.Info(ctx).Val()
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}, "30s", "100ms").Should(ContainSubstring("role:master"))
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// Check that client picked up new master.
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Eventually(func() error {
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return client.Get(ctx, "foo").Err()
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}, "15s", "100ms").ShouldNot(HaveOccurred())
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// Publish message to check if subscription is renewed.
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err = client.Publish(ctx, "foo", "hello").Err()
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Expect(err).NotTo(HaveOccurred())
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var msg *redis.Message
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Eventually(ch, "15s").Should(Receive(&msg))
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Expect(msg.Channel).To(Equal("foo"))
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Expect(msg.Payload).To(Equal("hello"))
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})
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It("supports DB selection", func() {
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Expect(client.Close()).NotTo(HaveOccurred())
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client = redis.NewFailoverClient(&redis.FailoverOptions{
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MasterName: sentinelName,
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SentinelAddrs: sentinelAddrs,
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DB: 1,
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})
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err := client.Ping(ctx).Err()
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Expect(err).NotTo(HaveOccurred())
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})
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})
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