Adding checksum verification kubectl (#9971)

pipeline.Dockerfile

 # Use imutable image tags rather than mutable tags (like ubuntu:20.04)
 FROM ubuntu:focal-20220531
-
-ARG ARCH=amd64
-
 # Some tools like yamllint need this
 # Pip needs this as well at the moment to install ansible
 # (and potentially other packages)
 # See: https://github.com/pypa/pip/issues/10219
 ENV VAGRANT_VERSION=2.3.4 \
     VAGRANT_DEFAULT_PROVIDER=libvirt \
-    VAGRANT_ANSIBLE_TAGS=facts \ 
+    VAGRANT_ANSIBLE_TAGS=facts \
     LANG=C.UTF-8 \
-    DEBIAN_FRONTEND=noninteractive
-	
-RUN apt update && apt install -y \
-    libssl-dev python3-dev python3-pip sshpass apt-transport-https jq moreutils libvirt-dev openssh-client rsync git \
-    ca-certificates curl gnupg2 software-properties-common unzip \
+    DEBIAN_FRONTEND=noninteractive \
+    PYTHONDONTWRITEBYTECODE=1
+
+RUN apt update -q \
+    && apt install -yq \
+         libssl-dev \
+         python3-dev \
+         python3-pip \
+         sshpass \
+         apt-transport-https \
+         jq \
+         moreutils \
+         libvirt-dev \
+         openssh-client \
+         rsync \
+         git \
+         ca-certificates \
+         curl \
+         gnupg2 \
+         software-properties-common \
+         unzip \
     && curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add - \
-    && add-apt-repository "deb [arch=$ARCH] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" \
-    && apt update && apt install --no-install-recommends -y docker-ce \
-    && apt autoremove -yqq --purge && apt clean && rm -rf /var/lib/apt/lists/*
+    && add-apt-repository "deb [arch=$(dpkg --print-architecture)] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" \
+    && apt update -q \
+    && apt install --no-install-recommends -yq docker-ce \
+    && apt autoremove -yqq --purge && apt clean && rm -rf /var/lib/apt/lists/* /var/log/*
 
 WORKDIR /kubespray
-
 COPY . .
 
 RUN update-alternatives --install /usr/bin/python python /usr/bin/python3 1 \
-    && pip install --no-cache-dir pip -U \
-    && pip install --no-cache-dir -r tests/requirements.txt -r requirements.txt \
+    && pip install --no-compile --no-cache-dir pip -U \
+    && pip install --no-compile --no-cache-dir -r tests/requirements.txt -r requirements.txt \
     && KUBE_VERSION=$(sed -n 's/^kube_version: //p' roles/kubespray-defaults/defaults/main.yaml) \
-    && curl -L https://storage.googleapis.com/kubernetes-release/release/$KUBE_VERSION/bin/linux/$ARCH/kubectl -o /usr/local/bin/kubectl\
+    && curl -L https://storage.googleapis.com/kubernetes-release/release/$KUBE_VERSION/bin/linux/$(dpkg --print-architecture)/kubectl -o /usr/local/bin/kubectl \
+    && echo $(curl -L https://storage.googleapis.com/kubernetes-release/release/$KUBE_VERSION/bin/linux/$(dpkg --print-architecture)/kubectl.sha256) /usr/local/bin/kubectl | sha256sum --check \
     && chmod a+x /usr/local/bin/kubectl \
     # Install Vagrant
-    && curl -LO https://releases.hashicorp.com/vagrant/${VAGRANT_VERSION}/vagrant_${VAGRANT_VERSION}-1_amd64.deb \
-    && dpkg -i vagrant_${VAGRANT_VERSION}-1_amd64.deb \
-    && rm vagrant_${VAGRANT_VERSION}-1_amd64.deb \
+    && curl -LO https://releases.hashicorp.com/vagrant/${VAGRANT_VERSION}/vagrant_${VAGRANT_VERSION}-1_$(dpkg --print-architecture).deb \
+    && dpkg -i vagrant_${VAGRANT_VERSION}-1_$(dpkg --print-architecture).deb \
+    && rm vagrant_${VAGRANT_VERSION}-1_$(dpkg --print-architecture).deb \
     && vagrant plugin install vagrant-libvirt \
     # Install Kubernetes collections
-    && pip install --no-cache-dir kubernetes \
+    && pip install --no-compile --no-cache-dir kubernetes \
     && ansible-galaxy collection install kubernetes.core \
     # Clean cache python
     && find / -type d -name '*__pycache__' -prune -exec rm -rf {} \;