installers/install_kubeadm_cluster.sh

   1 #!/bin/bash
   2 #
   3 #   Licensed under the Apache License, Version 2.0 (the "License");
   4 #   you may not use this file except in compliance with the License.
   5 #   You may obtain a copy of the License at
   6 #
   7 #       http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 #   Unless required by applicable law or agreed to in writing, software
  10 #   distributed under the License is distributed on an "AS IS" BASIS,
  11 #   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 #   See the License for the specific language governing permissions and
  13 #   limitations under the License.
  14 #
  15
  16 set +eux
  17
  18 K8S_VERSION=1.30
  19 K8S_PACKAGE_VERSION="$K8S_VERSION".1-1.1
  20 K8S_METRICS_VERSION="v0.7.1"
  21
  22 # installs kubernetes packages
  23 function install_kube() {
  24     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  25     # Kubernetes releases can be found here: https://kubernetes.io/releases/
  26     # To check other available versions, run the following command
  27     # curl -s https://packages.cloud.google.com/apt/dists/kubernetes-xenial/main/binary-amd64/Packages | grep Version | awk '{print $2}'
  28     sudo apt-get -y update && sudo apt-get install -y apt-transport-https ca-certificates curl
  29     curl -fsSL https://pkgs.k8s.io/core:/stable:/v"$K8S_VERSION"/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
  30     echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v'$K8S_VERSION'/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list
  31     sudo apt-get -y update
  32     echo "Installing Kubernetes Packages ..."
  33     sudo apt-get install -y kubelet=${K8S_PACKAGE_VERSION} kubeadm=${K8S_PACKAGE_VERSION} kubectl=${K8S_PACKAGE_VERSION}
  34     sudo apt-mark hold kubelet kubeadm kubectl
  35     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  36 }
  37
  38 # check and track kube packages installation
  39 function check_and_track_kube_install() {
  40     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  41     kubelet_version=$(dpkg -s kubelet|grep Version|awk '{print $2}')
  42     [ -n "${kubelet_version}" ] || FATAL_TRACK k8scluster "Kubelet was not installed."
  43     kubeadm_version=$(dpkg -s kubeadm|grep Version|awk '{print $2}')
  44     [ -n "${kubeadm_version}" ] || FATAL_TRACK k8scluster "Kubeadm was not installed."
  45     kubectl_version=$(dpkg -s kubectl|grep Version|awk '{print $2}')
  46     [ -n "${kubectl_version}" ] || FATAL_TRACK k8scluster "Kubectl was not installed."
  47     track k8scluster install_k8s_ok none none none kubelet ${kubelet_version} none none kubeadm ${kubeadm_version} none none kubectl ${kubectl_version} none none
  48     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  49 }
  50
  51 # initializes kubernetes control plane
  52 function init_kubeadm() {
  53     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  54     sudo swapoff -a
  55     sudo sed -i.bak '/.*none.*swap/s/^\(.*\)$/#\1/g' /etc/fstab
  56     sudo kubeadm init --config $1 --dry-run || FATAL_TRACK k8scluster "kubeadm init dry-run failed"
  57     sudo kubeadm init --config $1
  58     sleep 5
  59     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  60 }
  61
  62 # Initializes kubeconfig file
  63 function kube_config_dir() {
  64     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  65     K8S_MANIFEST_DIR="/etc/kubernetes/manifests"
  66     [ ! -d $K8S_MANIFEST_DIR ] && FATAL_TRACK k8scluster "Kubernetes folder $K8S_MANIFEST_DIR was not found"
  67     mkdir -p $HOME/.kube
  68     sudo cp /etc/kubernetes/admin.conf $HOME/.kube/config
  69     sudo chown $(id -u):$(id -g) $HOME/.kube/config
  70     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  71 }
  72
  73 # test kubernetes installation
  74 function check_and_track_init_k8s() {
  75     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  76     echo "Reading existing namespaces"
  77     kubectl get ns || FATAL_TRACK k8scluster "Failed getting namespaces"
  78     track k8scluster init_k8s_ok
  79     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  80 }
  81
  82 # deploys flannel as daemonsets
  83 function deploy_cni_provider() {
  84     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  85     CNI_DIR="$(mktemp -d -q --tmpdir "flannel.XXXXXX")"
  86     trap 'rm -rf "${CNI_DIR}"' EXIT
  87     KUBE_FLANNEL_FILE_URL="https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml"
  88     wget --retry-on-host-error --retry-on-http-error 404,429,503 --tries=5 "${KUBE_FLANNEL_FILE_URL}" -P $CNI_DIR
  89     [ ! -f $CNI_DIR/kube-flannel.yml ] && FATAL_TRACK k8scluster "Cannot Install Flannel because $CNI_DIR/kube-flannel.yml was not found. Maybe the file ${KUBE_FLANNEL_FILE_URL} is temporarily not accessible"
  90     kubectl apply -f $CNI_DIR
  91     [ $? -ne 0 ] && FATAL_TRACK k8scluster "Cannot Install Flannel"
  92     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  93 }
  94
  95 # taints K8s master node
  96 function taint_master_node() {
  97     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  98     K8S_MASTER=$(kubectl get nodes | awk '$3~/control-plane/'| awk '{print $1; exit}')
  99     kubectl taint node $K8S_MASTER node-role.kubernetes.io/control-plane:NoSchedule-
 100     sleep 5
 101     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 102 }
 103
 104 # check and track kube packages installation
 105 function check_and_track_k8s_ready_before_helm() {
 106     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 107     kubectl get events || FATAL_TRACK k8scluster "Failed getting events"
 108     track k8scluster k8s_ready_before_helm
 109     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 110 }
 111
 112 # removes osm deployments and services
 113 function install_k8s_metrics() {
 114     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 115     echo "Installing Kubernetes metrics"
 116     kubectl apply -f "https://github.com/kubernetes-sigs/metrics-server/releases/download/${K8S_METRICS_VERSION}/components.yaml"
 117     kubectl -n kube-system patch deployment metrics-server --type=json -p '[{"op":"add","path":"/spec/template/spec/containers/0/args/-","value":"--kubelet-insecure-tls"}]'
 118     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 119 }
 120
 121 # removes osm deployments and services
 122 function remove_k8s_namespace() {
 123     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 124     echo "Deleting existing namespace $1: kubectl delete ns $1"
 125     kubectl delete ns $1 2>/dev/null
 126     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 127 }
 128 # main
 129 while getopts ":D:d:i:-: " o; do
 130     case "${o}" in
 131         i)
 132             DEFAULT_IP="${OPTARG}"
 133             ;;
 134         d)
 135             OSM_CLUSTER_WORK_DIR="${OPTARG}"
 136             ;;
 137         D)
 138             OSM_DEVOPS="${OPTARG}"
 139             ;;
 140         -)
 141             [ "${OPTARG}" == "debug" ] && DEBUG_INSTALL="y" && continue
 142             echo -e "Invalid option: '--$OPTARG'\n" >&2
 143             exit 1
 144             ;;
 145         :)
 146             echo "Option -$OPTARG requires an argument" >&2
 147             exit 1
 148             ;;
 149         \?)
 150             echo -e "Invalid option: '-$OPTARG'\n" >&2
 151             exit 1
 152             ;;
 153         *)
 154             exit 1
 155             ;;
 156     esac
 157 done
 158
 159 source $OSM_DEVOPS/common/logging
 160 source $OSM_DEVOPS/common/track
 161
 162 echo "DEBUG_INSTALL=$DEBUG_INSTALL"
 163 echo "OSM_DEVOPS=$OSM_DEVOPS"
 164 echo "OSM_CLUSTER_WORK_DIR=$OSM_CLUSTER_WORK_DIR"
 165 echo "HOME=$HOME"
 166
 167 echo "Creating folders for installation"
 168 [ ! -d "$OSM_CLUSTER_WORK_DIR" ] && sudo mkdir -p $OSM_CLUSTER_WORK_DIR
 169 echo "Copying kubeadm-config from $OSM_DEVOPS/installers/kubeadm-config.yaml to $OSM_CLUSTER_WORK_DIR/kubeadm-config.yaml"
 170 sudo cp -b $OSM_DEVOPS/installers/kubeadm-config.yaml $OSM_CLUSTER_WORK_DIR/kubeadm-config.yaml
 171
 172 install_kube
 173 check_and_track_kube_install
 174
 175 init_kubeadm $OSM_CLUSTER_WORK_DIR/kubeadm-config.yaml
 176 kube_config_dir
 177 check_and_track_init_k8s
 178
 179 deploy_cni_provider
 180 taint_master_node
 181 check_and_track_k8s_ready_before_helm
 182
 183 install_k8s_metrics
 184
 185 remove_k8s_namespace osm
 186
 187 # install_helm has been moved to install_helm_client.sh, run from full_install_osm.sh,
 188 # but tracking is still here because the installation analytics still expects it
 189 track k8scluster install_helm_ok
 190
 191 # Installation of storage class, metallb and cert-manager has been moved
 192 # to install_cluster_addons.sh, run from full_install_osm.sh