Kubernetes helm & helmc

Helm is package management tool for Kubernetes.
This slide describe how to use helm!

Transcript

1. 1
   k8s helm & helmc
   Kubernetes meetup Tokyo #2
   

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2. 2
   ABOUT ME
   Software Engineer
   I’m developing cloud services.
   AYA IGARASHI
   NTT Communications
   @Ladicle
   

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3. 3
   AGENDA
   INTRODUCTION
   01
   02
   03
   ࠓ·Ͱͷ؅ཧํ๏
   04
   HOW TO MANAGE MANIFESTS?
   ABOUT K8S HELM & HELMC
   WHICH IS BETTER?
   HAPPY HELMING
   ͲΜͳ΋ͷ͔ɺҧ͍͸Կ͔
   ͲͪΒΛͲͷΑ͏ͳߏ੒Ͱ࢖͏΂͖͔
   ·ͱΊ
   

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4. 4
   How to mange
   Manifests?
   

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5. 5
   BASH
   MANAGEMENT of MANIFEST
   1 source env.sh
   2 printf "cat <<++EOS\n%s\n++EOS\n" "$(cat *service.yaml *deployment.yaml)" \
   3 | sh > all-in-one.yaml
   ؀ڥ͝ͱʹมߋ͍ͨ͠஋Λbashม਺ͱͯ͠ManifestʹຒΊࠐΈɺ
   ࣮ߦ͍ͨ͠؀ڥͷઃఆϑΝΠϧΛಡΈࠐΜͰ͔ΒγΣϧܳΛ͍ͯͨ͠
   ࠓ·Ͱ
   1 apiVersion: extensions/v1beta1
   2 kind: Deployment
   3 metadata:
   4 name: rabbitmq${SUFFIX}
   5 spec:
   6 replicas: ${REPLICA_NUMBER}
   7 template:
   8 metadata:
   9 labels:
   04
   02
   rabbitmq-deployment.yaml
   labelsҎ߱͸লུ͍ͯ͠Δ
   install-service-and-deployment.sh
   env.shͷதͰม਺Λexport
   

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6. 6
   PROBLEMS
   MANAGEMENT of MANIFEST
   01 DUPLICATE DEFINITIONS
   containersͷenvϑΟʔϧυʹෳ਺ͷϑΝΠϧʹڞ
   ௨ͷ؀ڥม਺͕ఆٛ͞Ε͍ͯΔͨΊɺमਖ਼࿙Ε͕
   ൃੜ͢Δɻ(࿈૝഑ྻ͕࢖͍͍ͨ….)
   02 HARD TO READ
   γϯϓϧʹߏ଄తͳม਺ΛఆٛͰ͖ͳ͍ͨΊઃఆ
   ϑΝΠϧ͕ಡΈͮΒ͍ɻ
   03 YAML LINT IS NOT ENOUGH
   ৺ͷฏԺͷͨΊmanifestΛk8s΁Πϯετʔϧ͢Δલ
   ʹࢼݧΛ࣮ࢪ͔͕ͨͬͨ͠ɺYAML lintͰ͸݁Ռ͕
   PASSEDͰ͋ͬͯ΋k8sͰಈ͔ͳ͍͜ͱ͕ଟʑ͋ͬͨɻ
   PROBLEM
   BASH
   

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7. 7
   By
   Helm
   

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8. 8
   What is Helm?
   ABOUT K8S HELM & HELMC
   GolangͷTemplate֦ுϥΠϒϥϦͰ͋ΔSprigͷه๏Λ࢖ͬͯManifestϑΝΠϧΛ
   ఆٛ͢Δ͜ͱ͕Ͱ͖Δɻ·ͨɺαϒίϚϯυͱͯ͠จ๏νΣοΫΛߦ͏
   lintίϚϯυ͕ఏڙ͞Ε͍ͯΔɻ
   K8SͷύοέʔδϚωʔδϟ
   1 # Githubb্Ͱެ։͞Ε͍ͯΔnginxύοέʔδΛݕࡧ
   2 $ helmc search nginx
   3 example-nginx - An example nginx + git-sync application
   4 nginx - Nginx http service
   5 nginx-alpine - Nginx http service
   6
   7 # Kubernetes΁nginxΛΠϯετʔϧ͢Δ
   8 $ helmc install nginx
   9 ---> No chart named "nginx" in your workspace. Fetching now.
   10 ---> Running `kubectl create -f` ...
   11 service "nginx" created
   12 replicationcontroller "nginx" created
   13 ---> Done
   

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9. 9
   Diff
   Helm Helmc
   

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10. 10
    ALL
    Different
    HELM CLASSIC
    KUBERNETES HELM
    Oct 18, 2015ʹDEISʹΑͬͯ࡞ΒΕͨ
    CLIͰChartͷ࡞੒/࡟আ/ߋ৽͕Ͱ͖Δɻ
    Chartͷόʔδϣϯ͸GitͷSHAsͰ൑ఆ
    ͞Ε͍ͯΔɻ
    Nov 1, 2015ʹk8s΁औΓࠐ·ΕͨΫϥΠΞ
    ϯταʔόܕͷπʔϧɻ12FactorAppͷࢥ
    ૝Λ΋ͱʹChart + Config = Release ͱ͍͏
    ߏ੒Λͱ͍ͬͯΔɻ
    What is Chart?
    k8sͷΠϯελϯεΛ࡞੒͢ΔͨΊʹඞཁͳ
    ςϯϓϨʔτ/஋ͷू߹ମ
    

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11. 11
    02
    KUBERNETES
    GITHUB
    install
    uninstall
    NGINX
    WORD
    PRESS
    MYSQL
    HELMC
    CHART FILES
    publish, fetch
    Create
    using kubectl
    Helm Classic
    ABOUT K8S HELM & HELMC
    

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12. 12
    02
    KUBERNETES
    install chart
    delete Release
    TILLER
    CHART FILES
    Kubernetes Helm
    ABOUT K8S HELM & HELMC
    HELM
    REST/JSON
    gRPC
    STORAGE
    NGINX
    WORD
    PRESS
    MYSQL
    Create
    Chart files
    contain
    Chart packages
    Package
    Chart files
    NGINX
    CHART PACKAGE
    get/update Release
    TarBall
    

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13. 13
    Which is
    Better?
    

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14. 14
    Which is better?
    Kubernetes Helm͸·ͩόʔδϣϯAlpha-1͕ϦϦʔε͞Ε
    ͨ͹͔ΓͰಈ͔ͳ͍΋ͷ͕ଟ͍ͨΊɻ
    Which is better?
    Now HELM CLASSIC
    Helm Classic͸ϝϯςφϯε͞Εͳ͘ͳΔͨΊɺ͋Δఔ౓҆ఆ͔ͯ͠
    Β͸Ҡͬͨํ͕Α͍ɻϩʔυϚοϓʹΑΔͱBeta1ʹ͸Chart.yamlͷ
    ϑΥʔϚοτΛFix͢ΔΒ͍͠ͷͰͦͷࠒʹ͸Ҡಈͯ͠΋Αͦ͞͏
    ROAD MAP: https://github.com/kubernetes/helm/issues/694
    Feature KUBERNETES HELM
    

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15. 15
    How to use
    Helmc
    

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16. 16
    How to use Helmc?
    WHICH IS BETTER?
    ςϯϓϨʔτͱม਺͸ݟ௨͕͠Α͍Α͏ʹσΟϨΫτϦΛ৽ͨʹ੾͍ͬͯΔɻ
    ·ͨɺม਺͸؀ڥ͝ͱʹϑΝΠϧΛ෼ׂ͠ڞ௨ͷσϑΥϧτ஋͸௚઀templateʹఆ͍ٛͯ͠Δɻ
    FILE STRUCTURE
    Variable file format
    HelmcͰ͸ม਺ϑΝΠϧͷϑΥʔϚοτ͸JSON/
    YAML/TOMLͷத͔Βબ୒Ͱ͖Δ͕ɺk8s Helm͸TOML
    ͷΈͷͨΊɺҠߦͷ͠΍͔͢͞ΒTOML͕͓͢͢Ί
    deployments-generator.sh
    ࣍ϖʔδͰઆ໌͢ΔCustomize generator͔Βݺͼͩ
    ͍ͯ͠ΔManifestͷੜ੒εΫϦϓτ
    └── rabbitmq
    ├── Chart.yaml
    ├── README.md
    ├── deployemnts-generator.sh
    ├── manifests
    ├── templates
    │ ├── service.yaml
    │ └── deployment.yaml
    └── variables
    └── lab1.toml.tpl
    └── lab2.toml.tpl
    

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17. 17
    Custom Generator
    WHICH IS BETTER?
    deployments-generator.sh (ൈਮ)
    (
    1 # helm:generate $HELM_GENERATE_DIR/deployemnts-generator.sh
    2 apiVersion: extensions/v1beta1
    3 kind: Deployment
    1 echo "deploymentType = \"${type}\"" > $tempdir/values.toml
    2
    3 for type in "age" "hoge"; do
    4 helmc template -d $tempdir/values.toml \
    5 -o manifests/${type}-deployment.yaml $HELM_GENERATE_FILE
    6 done
    deployment.yaml (ൈਮ)
    templateίϚϯυΛ࢖ͬͯManifestΛੜ੒͢Δͱ֤ϑΝΠϧຖʹ࣮ߦ͠ͳ͚Ε͹ͳΒͳ͍͕ɺgenerateί
    ϚϯυΛ࢖༻͢ΔͱҎԼͷdeployment.yamlͷΑ͏ʹҰߦ໨ʹgenerator͕ࢦఆ͞Ε͍ͯΔ΋ͷΛChartσΟ
    ϨΫτϦͷத͔Βऩू͠ɺҰׅͯ͠ManifestΛੜ੒͢Δ͜ͱ͕Ͱ͖Δɻ(Jenkinsͱͷ૬ੑΑ͠ʂ)
    

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18. 18
    More
    Information
    

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19. 19
    More Information
    HAPPY HELMING
    01
    02
    03
    http://slack.kubernetes.io/
    KUBERNETES SLACK #HELM CHANNEL
    MEETING ON ZOOM
    JAPANESE DOCUMENT
    Contribution
    ·ͩ·ͩ࢝·ͬͨ͹͔Γͷ໘ന͍ϓϩδΣΫτ
    খ͞ͳόάFIX͹਺೔ͰRV, MG͞ΕΔ
    खॱ͸ଞͷk8sϓϩδΣΫτͱಉ͡Ͱ͢
    https://engineyard.zoom.us/j/
    https://github.com/Ladicle/kubernetes-helm-jp-doc
    

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20. 20
    HAPPY HELMING!
    Thanks for watching
    @ladicle
    

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