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=1.29
  19 K8S_PACKAGE_VERSION="$K8S_VERSION".3-1.1
  20
  21 # installs kubernetes packages
  22 function install_kube() {
  23     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  24     # Kubernetes releases can be found here: https://kubernetes.io/releases/
  25     # To check other available versions, run the following command
  26     # curl -s https://packages.cloud.google.com/apt/dists/kubernetes-xenial/main/binary-amd64/Packages | grep Version | awk '{print $2}'
  27     sudo apt-get -y update && sudo apt-get install -y apt-transport-https ca-certificates curl
  28     curl -fsSL https://pkgs.k8s.io/core:/stable:/v"$K8S_VERSION"/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
  29     echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v'$K8S_VERSION'/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list
  30     sudo apt-get -y update
  31     echo "Installing Kubernetes Packages ..."
  32     sudo apt-get install -y kubelet=${K8S_PACKAGE_VERSION} kubeadm=${K8S_PACKAGE_VERSION} kubectl=${K8S_PACKAGE_VERSION}
  33     sudo apt-mark hold kubelet kubeadm kubectl
  34     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  35 }
  36
  37 # check and track kube packages installation
  38 function check_and_track_kube_install() {
  39     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  40     kubelet_version=$(dpkg -s kubelet|grep Version|awk '{print $2}')
  41     [ -n "${kubelet_version}" ] || FATAL_TRACK k8scluster "Kubelet was not installed."
  42     kubeadm_version=$(dpkg -s kubeadm|grep Version|awk '{print $2}')
  43     [ -n "${kubeadm_version}" ] || FATAL_TRACK k8scluster "Kubeadm was not installed."
  44     kubectl_version=$(dpkg -s kubectl|grep Version|awk '{print $2}')
  45     [ -n "${kubectl_version}" ] || FATAL_TRACK k8scluster "Kubectl was not installed."
  46     track k8scluster install_k8s_ok none none none kubelet ${kubelet_version} none none kubeadm ${kubeadm_version} none none kubectl ${kubectl_version} none none
  47     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  48 }
  49
  50 # initializes kubernetes control plane
  51 function init_kubeadm() {
  52     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  53     sudo swapoff -a
  54     sudo sed -i.bak '/.*none.*swap/s/^\(.*\)$/#\1/g' /etc/fstab
  55     sudo kubeadm init --config $1 --dry-run || FATAL_TRACK k8scluster "kubeadm init dry-run failed"
  56     sudo kubeadm init --config $1
  57     sleep 5
  58     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  59 }
  60
  61 # Initializes kubeconfig file
  62 function kube_config_dir() {
  63     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  64     K8S_MANIFEST_DIR="/etc/kubernetes/manifests"
  65     [ ! -d $K8S_MANIFEST_DIR ] && FATAL_TRACK k8scluster "Kubernetes folder $K8S_MANIFEST_DIR was not found"
  66     mkdir -p $HOME/.kube
  67     sudo cp /etc/kubernetes/admin.conf $HOME/.kube/config
  68     sudo chown $(id -u):$(id -g) $HOME/.kube/config
  69     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  70 }
  71
  72 # test kubernetes installation
  73 function check_and_track_init_k8s() {
  74     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  75     echo "Reading existing namespaces"
  76     kubectl get ns || FATAL_TRACK k8scluster "Failed getting namespaces"
  77     track k8scluster init_k8s_ok
  78     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  79 }
  80
  81 # deploys flannel as daemonsets
  82 function deploy_cni_provider() {
  83     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  84     CNI_DIR="$(mktemp -d -q --tmpdir "flannel.XXXXXX")"
  85     trap 'rm -rf "${CNI_DIR}"' EXIT
  86     KUBE_FLANNEL_FILE_URL="https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml"
  87     wget --retry-on-host-error --retry-on-http-error 404,429,503 --tries=5 "${KUBE_FLANNEL_FILE_URL}" -P $CNI_DIR
  88     [ ! -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"
  89     kubectl apply -f $CNI_DIR
  90     [ $? -ne 0 ] && FATAL_TRACK k8scluster "Cannot Install Flannel"
  91     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  92 }
  93
  94 # taints K8s master node
  95 function taint_master_node() {
  96     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  97     K8S_MASTER=$(kubectl get nodes | awk '$3~/control-plane/'| awk '{print $1; exit}')
  98     kubectl taint node $K8S_MASTER node-role.kubernetes.io/control-plane:NoSchedule-
  99     sleep 5
 100     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 101 }
 102
 103 # check and track kube packages installation
 104 function check_and_track_k8s_ready_before_helm() {
 105     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 106     kubectl get events || FATAL_TRACK k8scluster "Failed getting events"
 107     track k8scluster k8s_ready_before_helm
 108     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 109 }
 110
 111 # removes osm deployments and services
 112 function remove_k8s_namespace() {
 113     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 114     echo "Deleting existing namespace $1: kubectl delete ns $1"
 115     kubectl delete ns $1 2>/dev/null
 116     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 117 }
 118
 119 # main
 120 while getopts ":D:d:i:-: " o; do
 121     case "${o}" in
 122         i)
 123             DEFAULT_IP="${OPTARG}"
 124             ;;
 125         d)
 126             OSM_CLUSTER_WORK_DIR="${OPTARG}"
 127             ;;
 128         D)
 129             OSM_DEVOPS="${OPTARG}"
 130             ;;
 131         -)
 132             [ "${OPTARG}" == "debug" ] && DEBUG_INSTALL="y" && continue
 133             echo -e "Invalid option: '--$OPTARG'\n" >&2
 134             exit 1
 135             ;;
 136         :)
 137             echo "Option -$OPTARG requires an argument" >&2
 138             exit 1
 139             ;;
 140         \?)
 141             echo -e "Invalid option: '-$OPTARG'\n" >&2
 142             exit 1
 143             ;;
 144         *)
 145             exit 1
 146             ;;
 147     esac
 148 done
 149
 150 source $OSM_DEVOPS/common/logging
 151 source $OSM_DEVOPS/common/track
 152
 153 echo "DEBUG_INSTALL=$DEBUG_INSTALL"
 154 echo "OSM_DEVOPS=$OSM_DEVOPS"
 155 echo "OSM_CLUSTER_WORK_DIR=$OSM_CLUSTER_WORK_DIR"
 156 echo "HOME=$HOME"
 157
 158 echo "Creating folders for installation"
 159 [ ! -d "$OSM_CLUSTER_WORK_DIR" ] && sudo mkdir -p $OSM_CLUSTER_WORK_DIR
 160 echo "Copying kubeadm-config from $OSM_DEVOPS/installers/kubeadm-config.yaml to $OSM_CLUSTER_WORK_DIR/kubeadm-config.yaml"
 161 sudo cp -b $OSM_DEVOPS/installers/kubeadm-config.yaml $OSM_CLUSTER_WORK_DIR/kubeadm-config.yaml
 162
 163 install_kube
 164 check_and_track_kube_install
 165
 166 init_kubeadm $OSM_CLUSTER_WORK_DIR/kubeadm-config.yaml
 167 kube_config_dir
 168 check_and_track_init_k8s
 169
 170 deploy_cni_provider
 171 taint_master_node
 172 check_and_track_k8s_ready_before_helm
 173
 174 remove_k8s_namespace osm
 175
 176 # install_helm has been moved to install_helm_client.sh, run from full_install_osm.sh,
 177 # but tracking is still here because the installation analytics still expects it
 178 track k8scluster install_helm_ok
 179
 180 # Installation of storage class, metallb and cert-manager has been moved
 181 # to install_cluster_addons.sh, run from full_install_osm.sh