Liveness probe for RabbitMQ Client (Consumer)

I would like to know/get opinions on how to setup liveness probe for a RabbitMQ queue consumer. I am not sure how to verify if consumer is still processing messages from the queue. I have already tried searching for some clues over the internet but could not find any. So just asking a question here to see if anyone has got any idea.

The code block which I want to make sure working fine is

                var consumer = new EventingBasicConsumer(channel);

                consumer.Received += (model, ea) =>

                {

                    var body = ea.Body;

                    var message = Encoding.UTF8.GetString(body);

                    Console.WriteLine($"Message Received: {message}");

                };

Thank you.

edited Nov 19 '18 at 17:39

asked Nov 19 '18 at 14:01

Alpesh

35128

Are you trying to apply liveness probe in the yaml/json configuration file for RabbitMQ?

– Shudipta Sharma
Nov 19 '18 at 14:11

Also show your docker image used for RabbitMQ. Have you used the official docker image rabbitmq?

– Shudipta Sharma
Nov 19 '18 at 14:17

@ShudiptaSharma I have got rabbitmq container covered with both readiness and liveness probes. This question is about message consumer which is hosted in a different container.

– Alpesh
Nov 19 '18 at 17:35

add a comment |

The code block which I want to make sure working fine is

                var consumer = new EventingBasicConsumer(channel);

                consumer.Received += (model, ea) =>

                {

                    var body = ea.Body;

                    var message = Encoding.UTF8.GetString(body);

                    Console.WriteLine($"Message Received: {message}");

                };

Thank you.

edited Nov 19 '18 at 17:39

asked Nov 19 '18 at 14:01

Alpesh

35128

Are you trying to apply liveness probe in the yaml/json configuration file for RabbitMQ?

– Shudipta Sharma
Nov 19 '18 at 14:11

Also show your docker image used for RabbitMQ. Have you used the official docker image rabbitmq?

– Shudipta Sharma
Nov 19 '18 at 14:17

@ShudiptaSharma I have got rabbitmq container covered with both readiness and liveness probes. This question is about message consumer which is hosted in a different container.

– Alpesh
Nov 19 '18 at 17:35

add a comment |

The code block which I want to make sure working fine is

                var consumer = new EventingBasicConsumer(channel);

                consumer.Received += (model, ea) =>

                {

                    var body = ea.Body;

                    var message = Encoding.UTF8.GetString(body);

                    Console.WriteLine($"Message Received: {message}");

                };

Thank you.

edited Nov 19 '18 at 17:39

asked Nov 19 '18 at 14:01

Alpesh

35128

The code block which I want to make sure working fine is

                var consumer = new EventingBasicConsumer(channel);

                consumer.Received += (model, ea) =>

                {

                    var body = ea.Body;

                    var message = Encoding.UTF8.GetString(body);

                    Console.WriteLine($"Message Received: {message}");

                };

Thank you.

c# kubernetes rabbitmq azure-aks

edited Nov 19 '18 at 17:39

asked Nov 19 '18 at 14:01

Alpesh

35128

edited Nov 19 '18 at 17:39

asked Nov 19 '18 at 14:01

Alpesh

35128

edited Nov 19 '18 at 17:39

asked Nov 19 '18 at 14:01

Alpesh

35128

asked Nov 19 '18 at 14:01

Alpesh

35128

asked Nov 19 '18 at 14:01

Alpesh

35128

Are you trying to apply liveness probe in the yaml/json configuration file for RabbitMQ?

– Shudipta Sharma
Nov 19 '18 at 14:11

Also show your docker image used for RabbitMQ. Have you used the official docker image rabbitmq?

– Shudipta Sharma
Nov 19 '18 at 14:17

@ShudiptaSharma I have got rabbitmq container covered with both readiness and liveness probes. This question is about message consumer which is hosted in a different container.

– Alpesh
Nov 19 '18 at 17:35

add a comment |

Are you trying to apply liveness probe in the yaml/json configuration file for RabbitMQ?

– Shudipta Sharma
Nov 19 '18 at 14:11

Also show your docker image used for RabbitMQ. Have you used the official docker image rabbitmq?

– Shudipta Sharma
Nov 19 '18 at 14:17

@ShudiptaSharma I have got rabbitmq container covered with both readiness and liveness probes. This question is about message consumer which is hosted in a different container.

– Alpesh
Nov 19 '18 at 17:35

Are you trying to apply liveness probe in the yaml/json configuration file for RabbitMQ?

– Shudipta Sharma
Nov 19 '18 at 14:11

Also show your docker image used for RabbitMQ. Have you used the official docker image rabbitmq?

– Shudipta Sharma
Nov 19 '18 at 14:17

@ShudiptaSharma I have got rabbitmq container covered with both readiness and liveness probes. This question is about message consumer which is hosted in a different container.

– Alpesh
Nov 19 '18 at 17:35

add a comment |

1 Answer
1

active

oldest

votes

First thing, you will need to expose an HTTP endpoint in your application code that checks whether the consumer is alive or not.

There are many ways to test the liveness of the consumer, for example, you can check the timestamp of the last message that was consumed. If it's too old, you could declare the consumer as dead by returning an HTTP 500 error, otherwise, return HTTP 200. It depends on your business logic, you might want to use what I proposed, or any other method that fits your needs.

Once you have an HTTP endpoint, you can define a liveness probe in your Kubernetes manifest.

livenessProbe:

      httpGet:

        path: /healthz

        port: 8080

        httpHeaders:

        - name: X-Custom-Header

          value: Awesome

      initialDelaySeconds: 3

      periodSeconds: 3

(Taken from https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-probes/)

answered Nov 19 '18 at 17:07

areller

1,53511628

thanks for your answer. I have used all three types of probes in other parts of my AKS. I can setup probe but not sure what the logic should be to check if consumer is still processing messages. I liked your idea of checking timestamp but I am looking for a solution which can more accurately confirm the liveness of message consumer. It looks like I have to go for some sort of indirect solution similar to one you have suggested.

– Alpesh
Nov 19 '18 at 17:32

@Alpesh depending on what language you're using, the RabbitMQ client might have a method that returns whether it's alive or not. A quick search of the Java client led me to this document: rabbitmq.github.io/rabbitmq-java-client/api/current/com/… You can subscribe to events that indicate the state of the consumer. If you want to be sure, you could combine the solution I suggested with listening to these events.

– areller
Nov 19 '18 at 17:39

Not sure if any of the methods on the page can help in my scenario. I am using C# client and can't find anything useful there as well. I will keep looking for something useful,

– Alpesh
Nov 19 '18 at 18:02

You have events that correspond to these methods github.com/rabbitmq/rabbitmq-dotnet-client/blob/master/projects/…. Note that there is a default heartbeat mechanism in the consumer stackoverflow.com/questions/33699165/… So I don't think that you would gain anything by handling these events. You could still use the method that I've proposed just to make sure.

– areller
Nov 19 '18 at 18:36

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

First thing, you will need to expose an HTTP endpoint in your application code that checks whether the consumer is alive or not.

Once you have an HTTP endpoint, you can define a liveness probe in your Kubernetes manifest.

livenessProbe:

      httpGet:

        path: /healthz

        port: 8080

        httpHeaders:

        - name: X-Custom-Header

          value: Awesome

      initialDelaySeconds: 3

      periodSeconds: 3

(Taken from https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-probes/)

answered Nov 19 '18 at 17:07

areller

1,53511628

thanks for your answer. I have used all three types of probes in other parts of my AKS. I can setup probe but not sure what the logic should be to check if consumer is still processing messages. I liked your idea of checking timestamp but I am looking for a solution which can more accurately confirm the liveness of message consumer. It looks like I have to go for some sort of indirect solution similar to one you have suggested.

– Alpesh
Nov 19 '18 at 17:32

@Alpesh depending on what language you're using, the RabbitMQ client might have a method that returns whether it's alive or not. A quick search of the Java client led me to this document: rabbitmq.github.io/rabbitmq-java-client/api/current/com/… You can subscribe to events that indicate the state of the consumer. If you want to be sure, you could combine the solution I suggested with listening to these events.

– areller
Nov 19 '18 at 17:39

Not sure if any of the methods on the page can help in my scenario. I am using C# client and can't find anything useful there as well. I will keep looking for something useful,

– Alpesh
Nov 19 '18 at 18:02

You have events that correspond to these methods github.com/rabbitmq/rabbitmq-dotnet-client/blob/master/projects/…. Note that there is a default heartbeat mechanism in the consumer stackoverflow.com/questions/33699165/… So I don't think that you would gain anything by handling these events. You could still use the method that I've proposed just to make sure.

– areller
Nov 19 '18 at 18:36

add a comment |

First thing, you will need to expose an HTTP endpoint in your application code that checks whether the consumer is alive or not.

Once you have an HTTP endpoint, you can define a liveness probe in your Kubernetes manifest.

livenessProbe:

      httpGet:

        path: /healthz

        port: 8080

        httpHeaders:

        - name: X-Custom-Header

          value: Awesome

      initialDelaySeconds: 3

      periodSeconds: 3

(Taken from https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-probes/)

answered Nov 19 '18 at 17:07

areller

1,53511628

thanks for your answer. I have used all three types of probes in other parts of my AKS. I can setup probe but not sure what the logic should be to check if consumer is still processing messages. I liked your idea of checking timestamp but I am looking for a solution which can more accurately confirm the liveness of message consumer. It looks like I have to go for some sort of indirect solution similar to one you have suggested.

– Alpesh
Nov 19 '18 at 17:32

@Alpesh depending on what language you're using, the RabbitMQ client might have a method that returns whether it's alive or not. A quick search of the Java client led me to this document: rabbitmq.github.io/rabbitmq-java-client/api/current/com/… You can subscribe to events that indicate the state of the consumer. If you want to be sure, you could combine the solution I suggested with listening to these events.

– areller
Nov 19 '18 at 17:39

Not sure if any of the methods on the page can help in my scenario. I am using C# client and can't find anything useful there as well. I will keep looking for something useful,

– Alpesh
Nov 19 '18 at 18:02

You have events that correspond to these methods github.com/rabbitmq/rabbitmq-dotnet-client/blob/master/projects/…. Note that there is a default heartbeat mechanism in the consumer stackoverflow.com/questions/33699165/… So I don't think that you would gain anything by handling these events. You could still use the method that I've proposed just to make sure.

– areller
Nov 19 '18 at 18:36

add a comment |

First thing, you will need to expose an HTTP endpoint in your application code that checks whether the consumer is alive or not.

Once you have an HTTP endpoint, you can define a liveness probe in your Kubernetes manifest.

livenessProbe:

      httpGet:

        path: /healthz

        port: 8080

        httpHeaders:

        - name: X-Custom-Header

          value: Awesome

      initialDelaySeconds: 3

      periodSeconds: 3

(Taken from https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-probes/)

answered Nov 19 '18 at 17:07

areller

1,53511628

First thing, you will need to expose an HTTP endpoint in your application code that checks whether the consumer is alive or not.

Once you have an HTTP endpoint, you can define a liveness probe in your Kubernetes manifest.

livenessProbe:

      httpGet:

        path: /healthz

        port: 8080

        httpHeaders:

        - name: X-Custom-Header

          value: Awesome

      initialDelaySeconds: 3

      periodSeconds: 3

(Taken from https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-probes/)

answered Nov 19 '18 at 17:07

areller

1,53511628

answered Nov 19 '18 at 17:07

areller

1,53511628

answered Nov 19 '18 at 17:07

areller

1,53511628

answered Nov 19 '18 at 17:07

areller

1,53511628

thanks for your answer. I have used all three types of probes in other parts of my AKS. I can setup probe but not sure what the logic should be to check if consumer is still processing messages. I liked your idea of checking timestamp but I am looking for a solution which can more accurately confirm the liveness of message consumer. It looks like I have to go for some sort of indirect solution similar to one you have suggested.

– Alpesh
Nov 19 '18 at 17:32

@Alpesh depending on what language you're using, the RabbitMQ client might have a method that returns whether it's alive or not. A quick search of the Java client led me to this document: rabbitmq.github.io/rabbitmq-java-client/api/current/com/… You can subscribe to events that indicate the state of the consumer. If you want to be sure, you could combine the solution I suggested with listening to these events.

– areller
Nov 19 '18 at 17:39

Not sure if any of the methods on the page can help in my scenario. I am using C# client and can't find anything useful there as well. I will keep looking for something useful,

– Alpesh
Nov 19 '18 at 18:02

You have events that correspond to these methods github.com/rabbitmq/rabbitmq-dotnet-client/blob/master/projects/…. Note that there is a default heartbeat mechanism in the consumer stackoverflow.com/questions/33699165/… So I don't think that you would gain anything by handling these events. You could still use the method that I've proposed just to make sure.

– areller
Nov 19 '18 at 18:36

add a comment |

thanks for your answer. I have used all three types of probes in other parts of my AKS. I can setup probe but not sure what the logic should be to check if consumer is still processing messages. I liked your idea of checking timestamp but I am looking for a solution which can more accurately confirm the liveness of message consumer. It looks like I have to go for some sort of indirect solution similar to one you have suggested.

– Alpesh
Nov 19 '18 at 17:32

@Alpesh depending on what language you're using, the RabbitMQ client might have a method that returns whether it's alive or not. A quick search of the Java client led me to this document: rabbitmq.github.io/rabbitmq-java-client/api/current/com/… You can subscribe to events that indicate the state of the consumer. If you want to be sure, you could combine the solution I suggested with listening to these events.

– areller
Nov 19 '18 at 17:39

Not sure if any of the methods on the page can help in my scenario. I am using C# client and can't find anything useful there as well. I will keep looking for something useful,

– Alpesh
Nov 19 '18 at 18:02

You have events that correspond to these methods github.com/rabbitmq/rabbitmq-dotnet-client/blob/master/projects/…. Note that there is a default heartbeat mechanism in the consumer stackoverflow.com/questions/33699165/… So I don't think that you would gain anything by handling these events. You could still use the method that I've proposed just to make sure.

– areller
Nov 19 '18 at 18:36

thanks for your answer. I have used all three types of probes in other parts of my AKS. I can setup probe but not sure what the logic should be to check if consumer is still processing messages. I liked your idea of checking timestamp but I am looking for a solution which can more accurately confirm the liveness of message consumer. It looks like I have to go for some sort of indirect solution similar to one you have suggested.

– Alpesh
Nov 19 '18 at 17:32

@Alpesh depending on what language you're using, the RabbitMQ client might have a method that returns whether it's alive or not. A quick search of the Java client led me to this document: rabbitmq.github.io/rabbitmq-java-client/api/current/com/… You can subscribe to events that indicate the state of the consumer. If you want to be sure, you could combine the solution I suggested with listening to these events.

– areller
Nov 19 '18 at 17:39

Not sure if any of the methods on the page can help in my scenario. I am using C# client and can't find anything useful there as well. I will keep looking for something useful,

– Alpesh
Nov 19 '18 at 18:02

You have events that correspond to these methods github.com/rabbitmq/rabbitmq-dotnet-client/blob/master/projects/…. Note that there is a default heartbeat mechanism in the consumer stackoverflow.com/questions/33699165/… So I don't think that you would gain anything by handling these events. You could still use the method that I've proposed just to make sure.

– areller
Nov 19 '18 at 18:36

add a comment |

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