remove docker installation from everywhere

cluster/addons/node-problem-detector/npd.yaml

@@ -51,7 +51,7 @@ spec:
         command:
         - "/bin/sh"
         - "-c"
-        - "exec /node-problem-detector --logtostderr --config.system-log-monitor=/config/kernel-monitor.json,/config/docker-monitor.json,/config/systemd-monitor.json --config.custom-plugin-monitor=/config/kernel-monitor-counter.json,/config/systemd-monitor-counter.json --config.system-stats-monitor=/config/system-stats-monitor.json >>/var/log/node-problem-detector.log 2>&1"
+        - "exec /node-problem-detector --logtostderr --config.system-log-monitor=/config/kernel-monitor.json,/config/systemd-monitor.json --config.custom-plugin-monitor=/config/kernel-monitor-counter.json,/config/systemd-monitor-counter.json --config.system-stats-monitor=/config/system-stats-monitor.json >>/var/log/node-problem-detector.log 2>&1"
         securityContext:
           privileged: true
         resources:

cluster/gce/gci/configure.sh

@@ -472,44 +472,6 @@ function load-docker-images {
   fi
 }
 
-# If we are on ubuntu we can try to install docker
-function install-docker {
-  # bailout if we are not on ubuntu
-  if ! command -v apt-get >/dev/null 2>&1; then
-    echo "Unable to automatically install docker. Bailing out..."
-    return
-  fi
-  # Install Docker deps, some of these are already installed in the image but
-  # that's fine since they won't re-install and we can reuse the code below
-  # for another image someday.
-  apt-get update
-  apt-get install -y --no-install-recommends \
-    apt-transport-https \
-    ca-certificates \
-    socat \
-    curl \
-    gnupg2 \
-    software-properties-common \
-    lsb-release
-
-  release=$(lsb_release -cs)
-
-  # Add the Docker apt-repository
-  # shellcheck disable=SC2086
-  curl ${CURL_FLAGS} \
-    --location \
-    "https://download.docker.com/${HOST_PLATFORM}/$(. /etc/os-release; echo "$ID")/gpg" \
-  | apt-key add -
-  add-apt-repository \
-    "deb [arch=${HOST_ARCH}] https://download.docker.com/${HOST_PLATFORM}/$(. /etc/os-release; echo "$ID") \
-    $release stable"
-
-  # Install Docker
-  apt-get update && \
-    apt-get install -y --no-install-recommends "${GCI_DOCKER_VERSION:-"docker-ce=5:19.03.*"}"
-  rm -rf /var/lib/apt/lists/*
-}
-
 # If we are on ubuntu we can try to install containerd
 function install-containerd-ubuntu {
   # bailout if we are not on ubuntu
@@ -591,7 +553,7 @@ function ensure-container-runtime {
   if [[ -e "/etc/profile.d/containerd_env.sh" ]]; then
    log-wrap 'SourceContainerdEnv' source "/etc/profile.d/containerd_env.sh"
   fi
-    
+
   # Verify presence and print versions of ctr, containerd, runc
   if ! command -v ctr >/dev/null 2>&1; then
     echo "ERROR ctr not found. Aborting."

cluster/gce/windows/k8s-node-setup.psm1

@@ -982,7 +982,7 @@ function Configure-GcePdTools {
   Import-Module -Name $modulePath'.replace('K8S_DIR', ${env:K8S_DIR})
 }
 
-# Setup cni network. This function supports both Docker and containerd.
+# Setup cni network for containerd.
 function Prepare-CniNetworking {
     Configure_Containerd_CniNetworking
 }
@@ -1213,8 +1213,7 @@ function Pull-InfraContainer {
   Log-Output "Infra/pause container:`n$inspect"
 }
 
-# Setup the container runtime on the node. It supports both
-# Docker and containerd.
+# Setup the containerd on the node.
 function Setup-ContainerRuntime {
   Install-Pigz
   Install_Containerd
@@ -1251,35 +1250,6 @@ function Enable-HyperVFeature {
   Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V-Management-PowerShell -All -NoRestart
 }
 
-function Test-DockerIsInstalled {
-  return ((Get-Package `
-               -ProviderName DockerMsftProvider `
-               -ErrorAction SilentlyContinue |
-           Where-Object Name -eq 'docker') -ne $null)
-}
-
-function Test-DockerIsRunning {
-  return ((Get-Service docker).Status -eq 'Running')
-}
-
-# Installs Docker EE via the DockerMsftProvider. Ensure that the Windows
-# Containers feature is installed before calling this function; otherwise,
-# a restart may be needed after this function returns.
-function Install-Docker {
-  Log-Output 'Installing NuGet module'
-  Install-PackageProvider -Name NuGet -MinimumVersion 2.8.5.201 -Force
-
-  Log-Output 'Installing DockerMsftProvider module'
-  Install-Module -Name DockerMsftProvider -Repository PSGallery -Force
-
-  Log-Output "Installing latest Docker EE version"
-  Install-Package `
-      -Name docker `
-      -ProviderName DockerMsftProvider `
-      -Force `
-      -Verbose
-}
-
 # Configures the TCP/IP parameters to be in sync with the GCP recommendation.
 # Not setting these values correctly can cause network issues for connections
 # that live longer than 10 minutes.
@@ -1518,7 +1488,7 @@ function Install-Pigz {
       Expand-Archive -Path "$PIGZ_ROOT\pigz-$PIGZ_VERSION.zip" `
         -DestinationPath $PIGZ_ROOT
       Remove-Item -Path "$PIGZ_ROOT\pigz-$PIGZ_VERSION.zip"
-      # Docker and Containerd search for unpigz.exe on the first container image
+      # Containerd search for unpigz.exe on the first container image
       # pull request after the service is started. If unpigz.exe is in the
       # Windows path it'll use it instead of the default unzipper.
       # See: https://github.com/containerd/containerd/issues/1896