Please enable JavaScript.

Coggle requires JavaScript to display documents.

Kubernetes Intro Naeem, Helm Pkg manager, Helm Advanced topics - Coggle…

- - - - Pending
        
        Waiting for node allocation
      - ContainerCreation
        
        Node has been alloted
      - Running
    - - PodScheduled? T/F
      - Initialized?T/F
      - ContainerReady?
        
        All containers hv started running
      - Ready
  - - - kind: Deployment
      - spec:
        replicas: 3
        selector : <Defn for Selector>
        template: <Defn Of ReplicaSet>
  - - - Properties
        
        kind: Service
        
        spec:
        type: NodePort
        -ports:
        targetPort:<PortNo>
        port: <PortNo>
        nodePort: <PortNo>
    - - NodePort
        
        Valid Port Range:
        30000-32767
      - ClustetIP
      - LoadBalancer: 8008
  - - - Ingress Controller
      - Ingress Resources
  - - - Job that runs periodically.
- - - - Consists Pods
      - Node Components
        
        kubelet: An agent that runs on each node in the cluster.
        It makes sure that containers are running in a Pod.
        
        kube-proxy : Network proxy that runs on
        each node in your cluster, implementing part
        of the Kubernetes Service concept.
  - - - a. kube-apiserver
        
        exposes the Kubernetes API
      - b. etcd
        
        Consistent and highly-available
        key value store
      - c. kube-scheduler
        
        watches for newly created Pods
        with no assigned node,
        and selects a node for them to run on.
      - d. kube-controller-manager
        
        Runs controller processes.
        
        Node controller
        
        Replication controller
        
        Endpoints controller
        
        Service Account &
        Token controllers
      - e. cloud-controller-manager
        
        Embeds cloud-specific control logic.
- - - - Docker Images:
        Template of application
      - Docker Contaier:
        Running Instance of App
      - Sample File
        
        This is a sample Image
        FROM ubuntu
        MAINTAINER demousr@gmail.com
        RUN apt-get update
        RUN apt-get install –y nginx
        CMD [“echo”,”Image created”]
- - - - chart Dir
        hello-world /
        
        Chart.yaml
        
        main file that contains the description of our chart
        
        values.yaml
        
        file that contains the default values for our chart
        
        templates /
        
        directory where Kubernetes resources
        are defined as templates
        
        Sample k8s templates
        deployment.yaml,
        service.yaml, ingress.yaml
        
        charts /
        
        optional directory that may
        contain sub-charts
        
        .helmignore
        
        define patterns to ignore when packaging
        (similar in concept to .gitignore)
- - - - eg: helm template ./hello-world
  - - - eg: helm install --name hello-world ./hello-world
- - - - Collection of templates,
        packaged into versioned archives
        for deployment
    - - Provide useful utilities or functions
        for the chart developer. Used by app charts