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Service:

Sumit Rawal answered on February 16, 2023 Popularity 10/10 Helpfulness 1/10

Contents


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  • What is Service?

  • Service:

    0

    1. When using RC,RS,deployement, pods are terminated and created during scaling or replication operations

    When using deployment , while updating the image version the pods are terminated and new pods take the

    place of other pods.

    2.

    Pods are very dynamic i.e. they come & go on the k8s cluster and on any of the available nodes & it would

    be difficult to access the pods as the pods IP changes its recreated.

    3.

    4. Service objects is an logical bridge between pods and end user, which provide virtual IP

    5. Service allow client to reliably connect to the the containers running in the pod using the VIP

    The VIP is not a actual IP connected to a network interface, but its purpose is purely forward traffic to one or

    more pods

    6.

    kube proxy is the one which keeps the mapping between the VIP and pods up to date, which queries the API

    server to learn about new services in the cluster

    7.

    8. Although each pod having unique IP address, but those are not accessible outside the cluster.

    9. Services help to expose the VIP mapped to the pod & allow application to receive traffic

    10. Label are used to select which are the pods to be put under the service

    11. Creating a service will create an endpoint to access the pods/application in it.

    Service can be expose in 3 different way be specifying a type in the service spec

    a. Cluster IP

    b. Node Port

    c. Load Balancer

    12.

    13. By default service can run only between ports 30,000 - 32767.

    14. The set of pods targeted by a service usually determined by a selector  

    Popularity 10/10 Helpfulness 1/10 Language whatever
    Source: Grepper
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    Contributed on May 06 2023
    Sumit Rawal
    0 Answers  Avg Quality 2/10

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    Popularity 10/10 Helpfulness 1/10 Language java
    Source: Grepper
    Tags: java
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    Contributed on Feb 16 2023
    Pragya Keshap
    0 Answers  Avg Quality 2/10


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