Início / coding / Perguntas / 79303978
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Sal-laS
Asked: 2024-12-24 02:59:33 +0800 CST

Como configurar `kubectl krew` dentro do Docker Container?

  • 772

Estou tentando usar kubectldentro krewde um contêiner Docker. Aqui está meu Dockerfile:

FROM alpine:latest
ENV KUBECTL_VERSION=v1.30.5 KREW_VERSION=v0.4.4
RUN apk update && apk add --no-cache curl bash git \
    && curl -LO "https://dl.k8s.io/release/${KUBECTL_VERSION}/bin/linux/amd64/kubectl" \
    && chmod +x kubectl && mv kubectl /usr/local/bin/ \
    && curl -fsSL "https://github.com/kubernetes-sigs/krew/releases/download/${KREW_VERSION}/krew-linux_amd64.tar.gz" | tar xz -C /tmp \
    && mv /tmp/krew-* /usr/local/bin/krew \
    && /usr/local/bin/krew install konfig
ENV PATH="/root/.krew/bin:${PATH}"
CMD ["tail", "-f", "/dev/null"]

Passos que segui:

  1. Construiu a imagem:docker build -t kubectl-krew .
  2. Executei o contêiner:docker run -it kubectl-krew
  3. Dentro do recipiente:
    • kubectl versionobras e shows: 
      Client Version: v1.30.5
Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3
The connection to the server localhost:8080 was refused - did you specify the right host or port?
    • krew versionmostra: 
      OPTION            VALUE
GitTag            v0.4.4
GitCommit         343e657
IndexURI          https://github.com/kubernetes-sigs/krew-index.git
BasePath          /root/.krew
IndexPath         /root/.krew/index/default
InstallPath       /root/.krew/store
BinPath           /root/.krew/bin
DetectedPlatform  linux/amd64
    • Mas kubectl krew updatefalha com:
      error: unknown command "krew" for "kubectl"

A variável de ambiente $PATHé:
/root/.krew/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin.

Por que não é kubectl krewreconhecido? Como posso consertar isso?

docker

1 respostas

  1. Best Answer

    HAHA!!! Resolvi o problema.

    Se você olhar a página de instalação do krew, você encontrará as instruções para instalar krewno Linux. Então, eu preciso executar

    (
  set -x; cd "$(mktemp -d)" &&
  OS="$(uname | tr '[:upper:]' '[:lower:]')" &&
  ARCH="$(uname -m | sed -e 's/x86_64/amd64/' -e 's/\(arm\)\(64\)\?.*/\1\2/' -e 's/aarch64$/arm64/')" &&
  KREW="krew-${OS}_${ARCH}" &&
  curl -fsSLO "https://github.com/kubernetes-sigs/krew/releases/latest/download/${KREW}.tar.gz" &&
  tar zxvf "${KREW}.tar.gz" &&
  ./"${KREW}" install krew
)

    e então finalmente:

    export PATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH"

    Então, incluí as alterações acima no meu Dockerfileabaixo:

    # Base image
FROM ubuntu:20.04

# Set non-interactive mode for APT
ENV DEBIAN_FRONTEND=noninteractive

# Install dependencies
RUN apt-get update && apt-get install -y \
    curl \
    tar \
    git \
    ca-certificates \
    && apt-get clean

# Install kubectl
RUN curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl" && \
    chmod +x kubectl && \
    mv kubectl /usr/local/bin/

# Install krew
RUN set -x; \
    cd "$(mktemp -d)" && \
    OS="$(uname | tr '[:upper:]' '[:lower:]')" && \
    ARCH="$(uname -m | sed -e 's/x86_64/amd64/' -e 's/\(arm\)\(64\)\?.*/\1\2/' -e 's/aarch64$/arm64/')" && \
    KREW="krew-${OS}_${ARCH}" && \
    curl -fsSLO "https://github.com/kubernetes-sigs/krew/releases/latest/download/${KREW}.tar.gz" && \
    tar zxvf "${KREW}.tar.gz" && \
    ./"${KREW}" install krew && \
    rm -rf "${KREW}.tar.gz" ./"${KREW}"

# Set up PATH for krew
ENV PATH="${KREW_ROOT:-/root/.krew}/bin:$PATH"

# Verify installation
RUN kubectl krew version && kubectl version --client

# Set the entrypoint to keep the container alive
CMD ["tail", "-f", "/dev/null"]

    e agora quando eu corro kubectl krew version, eu recebo:

    OPTION            VALUE
GitTag            v0.4.4
GitCommit         343e657
IndexURI          https://github.com/kubernetes-sigs/krew-index.git
BasePath          /root/.krew
IndexPath         /root/.krew/index/default
InstallPath       /root/.krew/store
BinPath           /root/.krew/bin
DetectedPlatform  linux/amd64
    • 0

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