Vikube: Operate Kubernetes in Vim

Transcript

1. VIKUBE
   VIM & KUBERNETES OPERTATION
   

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2. VIKUBE
   @C9S
   ▸ Started open source development from the Perl
   community since 2007
   ▸ Maintained over 50 modules on CPAN. The largest Perl
   module platform.
   ▸ Found over 200 projects on GitHub from C, VimL, Perl,
   JavaScript, TypeScript and PHP.
   ▸ Contributed code to Facebook HHVM, PHP Zend Engine
   and the Google Go project.
   

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3. VIKUBE
   @C9S & KUBERNETRES
   ▸ Started using Kubernetes for the deep learning training
   platform since last year (Mid 2017)
   ▸ As a Developer, we heavily use Kubernetes API for
   integrating the applications.
   ▸ As a DevOps, we integrate CI/CD with Kubernetes, and
   use Vikube for debugging the Kubernetes deployments.
   

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4. KUBERNETES
   5 MINUTES
   

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5. KUBERNETES
   ARCHITECTUR
   E REVIEW
   

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6. Minion
   kubelet
   Pod
   Container
   Master
   API Server
   Replication Controller
   Scheduler
   Pod
   Container
   Minion
   kubelet
   Pod
   Container
   Pod
   Container
   Minion
   kubelet
   Pod
   Container
   Pod
   Container
   

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7. KUBERNETES
   RESOURCE
   REVIEW
   

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8. 5 MINUTES KUBERNETES
   POD
   ▸ A pod (as in a pod of whales or pea pod) is a group of
   one or more containers (such as Docker containers)
   ▸ with shared storage/network,
   ▸ and a specification for how to run the containers.
   

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9. 5 MINUTES KUBERNETES
   REPLICATION CONTROLLER
   ▸ A ReplicationController ensures that a specified number of
   pod replicas are running at any one time. In other words, a
   ReplicationController makes sure that a pod or a
   homogeneous set of pods is always up and available.with
   shared storage/network,
   

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10. 5 MINUTES KUBERNETES
    REPLICASET
    ▸ ReplicaSet is the next-generation Replication Controller.
    The only difference between a ReplicaSet and a
    Replication Controller right now is the selector support.
    ▸ Difference: ReplicaSet supports the new set-based
    selector requirements whereas a Replication Controller
    only supports equality-based selector requirements.
    

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11. 5 MINUTES KUBERNETES
    DEPLOYMENT
    ▸ A Deployment controller provides declarative updates for
    Pods and ReplicaSets.
    ▸ You describe a desired state in a Deployment object, and
    the Deployment controller changes the actual state to the
    desired state at a controlled rate.
    ▸ You can define Deployments to create new ReplicaSets, or
    to remove existing Deployments and adopt all their
    resources with new Deployments.
    

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12. OPERATION
    DEBUGGING
    KUBERNETES
    

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13. VIKUBE
    KUBERNETES VERBS
    ▸ kubectl create
    ▸ kubectl delete
    ▸ kubectl get
    ▸ kubectl edit
    ▸ kubectl replace
    ▸ kubectl patch
    

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14. kubectl get pods
    取得現在在預設名稱空間中正在運⾏行行的 Pods
    CHECK PODS
    

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15. kubectl get pvc
    檢查現在可使⽤用的 Persistent Volume Claim
    CHECK PERSISTENT
    VOLUME CLAIM
    

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16. kubectl get pods -o wide
    取得現在正在運⾏行行的 Pods 以及其 IP 與正在運⾏行行的 Node
    CHECK PODS WITH IP AND
    NODES
    

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17. kubectl get pods -o wide \
    --all-namespaces
    取得現在所有名稱空間中正在運⾏行行的 Pods 以及其 IP 與正在運⾏行行的 Node
    CHECK PODS FROM ALL
    NAMESPACES
    

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18. kubectl get pods -w
    監測 Pods 動態
    WATCH PODS
    

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19. kubectl logs -c webapp -f nginx-xxx
    調閱 Container 紀錄
    TAIL CONTAINER LOG
    

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20. kubectl exec -it nginx-xxx /bin/sh
    在⽬目前正在運⾏行行中的 Container 中執⾏行行命令
    EXECUTE COMMAND IN
    THE CONTAINER
    

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21. CRASHLOOPBACKOFF!
    

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22. VIKUBE
    SOP FOR FIXING CRASHLOOPBACKOFF
    ▸ Check the logs of the containers in the pod
    ▸ Describe the pod
    ▸ Check if the volume is available?
    ▸ Check the events of the pod
    ▸ Check the availability of the image
    ▸ Exec into the container and try to reproduce the problem
    ▸ Check the authentication to the image repository (usually happens
    to the images on ECS or GCR)
    

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23. VIKUBE
    TIME WASTED
    ▸ Copy the target pod name
    ▸ Enter the describe command and paste the pod name
    ▸ Enter the logs command and paste the pod name
    ▸ Enter the exec command and paste the pod name
    ▸ Get the events and then use the pod name to grep
    ▸ Or, get the related deployment, statefulset ...
    

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24. VIKUBE
    SOLUTIONS TO THESE REPEATED COMMANDS
    ▸ kube-shell
    ▸ kube-prompt
    ▸ kubesh
    

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25. All of them requires you
    to type subcommands
    

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26. I have Vim
    

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27. I have
    Kubernetes
    

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29. WHAT'S
    VIKUBE?
    

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30. USE VIM AS
    THE USER
    INTERFACE
    

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31. vim -c ":Vikube"
    All you need is VIM
    ENTERING VIKUBE
    

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36. Live Demo
    

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37. WHY USE
    VIM?
    

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38. 跨平台
    

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39. 可遠端執⾏
    

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40. 超快
    

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41. 超⽅便
    

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43. Why can't you
    Get out of vim?
    

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45. Why Is It So
    Hard?
    

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47. 嚇你的
    

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49. HOW DOES
    IT WORK?
    

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51. VIKUBE
    VIEWPORTS AND BUFFERS
    

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52. VIKUBE
    TAB VIEWPORTS AND BUFFERS
    

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54. LEARN VIM
    IN 5 MINUTES
    

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55. Scope
    

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56. b:
    g:
    s:
    w:
    t:
    Buffer Scope
    Global Scope
    Script Scope
    Window Scope
    Tab Scope
    

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57. b:
    g:
    s:
    w:
    t:
    let foo = 1
    let
    let
    let
    let
    foo = 1
    foo = 1
    foo = 1
    foo = 1
    

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58. Function
    

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59. function! Add(x, y)
    return a:x + a:y
    endfunction
    let y = Add(1,2)
    

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60. function! Foo()
    let x = 0
    function! Bar() closure
    let x += 1
    return x
    endfunction
    return funcref('Bar')
    endfunction
    let F = Foo()
    echo F()
    

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61. :function {arguments}
    {name} ( ) range
    abort
    closure
    dict
    :endfunction
    When the [abort] argument is added, the
    function will abort as soon as an error is
    detected.
    When the [closure] argument is added, the function
    can access variables and arguments from the outer
    scope. This is usually called a closure.
    When the [dict] argument is added, the function must be
    invoked through an entry in a |Dictionary|.
    The local variable "self" will then be set to the dictionary.
    When the [closure] argument is added, the function
    can access variables and arguments from the outer
    scope.
    

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62. Command
    

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63. :w
    :q
    :buffers
    :split
    :vsplit
    

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64. -buffer
    -range
    command! {name} {command}
    -range=%
    -range=N
    -bar
    -count=N
    -bang
    -register The first arguments to the command can be an optional register name
    The command will only be available in the current buffer
    {options}
    Range allowed, the default is the current line
    Range allowed, the default is the whole file
    A default N which is specified in the line number position
    A count (default N) which is specified either in
    the line number position, or as an initial
    argument
    The command can be followed by a "|" and
    another command. A "|" inside the command
    argument is not allowed then.
    The command can take a ! modifier (like :q or :w)
    

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65. Define The
    Source
    

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66. fun! s:source()
    let cmd = s:cmdbase()
    let cmd = cmd . " get " . b:resource_type
    if b:wide
    let cmd = cmd . " -o wide"
    endif
    if b:all_namespace
    let cmd = cmd . " --all-namespaces"
    endif
    if b:show_all
    let cmd = cmd . " --show-all"
    endif
    redraw | echomsg cmd
    return system(cmd . "| awk 'NR == 1; NR > 1 {print $0 | \"sort -b -k1\"}'")
    endf
    

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67. Render The
    Screen
    

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68. :tabnew
    

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69. :setlocal noswapfile nonumber
    :setlocal nobuflisted buftype=nofile bufhidden=wipe
    

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70. :setlocal updatetime=2000
    

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71. cal s:render()
    Script Scope
    

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72. fun! s:render()
    let save_cursor = getcurpos()
    if b:source_changed || !exists('b:source_cache')
    let b:source_cache = s:source()
    let b:source_changed = 0
    endif
    setlocal modifiable
    " clear the buffer
    redraw
    normal ggdG
    " draw the result
    redraw
    put=out
    " remove the first empty line
    redraw
    normal ggdd
    endf
    Data Source
    Clear the screen and redraw
    Render the screen
    Unlock buffer
    

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73. Now, Get Your
    DevOps Done in Vim
    

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74. github.com/c9s/
    vikube.vim
    

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75. THANK
    YOU
    

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