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 save_kubeconfig() {
  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 $K8S_MANIFEST_DIR was not found"
  67     KUBEDIR="${HOME}/.kube"
  68     KUBEFILE="$KUBEDIR/config"
  69     mkdir -p "${KUBEDIR}"
  70     KUBEADM_KUBECONFIG="/etc/kubernetes/admin.conf"
  71     sudo cp "${KUBEADM_KUBECONFIG}" "${KUBEFILE}"
  72     sudo chown $(id -u):$(id -g) "${KUBEFILE}"
  73     echo
  74     echo "Credentials saved at ${KUBEFILE}"
  75     echo
  76     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  77 }
  78
  79 # test kubernetes installation
  80 function check_and_track_init_k8s() {
  81     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  82     echo "Reading existing namespaces"
  83     kubectl get ns || FATAL_TRACK k8scluster "Failed getting namespaces"
  84     track k8scluster init_k8s_ok
  85     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  86 }
  87
  88 # deploys flannel as daemonsets
  89 function deploy_cni_provider() {
  90     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  91     CNI_DIR="$(mktemp -d -q --tmpdir "flannel.XXXXXX")"
  92     trap 'rm -rf "${CNI_DIR}"' EXIT
  93     KUBE_FLANNEL_FILE_URL="https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml"
  94     wget --retry-on-host-error --retry-on-http-error 404,429,503 --tries=5 "${KUBE_FLANNEL_FILE_URL}" -P $CNI_DIR
  95     [ ! -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"
  96     kubectl apply -f $CNI_DIR
  97     [ $? -ne 0 ] && FATAL_TRACK k8scluster "Cannot Install Flannel"
  98     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  99 }
 100
 101 # taints K8s master node
 102 function taint_master_node() {
 103     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 104     K8S_MASTER=$(kubectl get nodes | awk '$3~/control-plane/'| awk '{print $1; exit}')
 105     kubectl taint node $K8S_MASTER node-role.kubernetes.io/control-plane:NoSchedule-
 106     sleep 5
 107     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 108 }
 109
 110 # check and track kube packages installation
 111 function check_and_track_k8s_ready_before_helm() {
 112     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 113     kubectl get events || FATAL_TRACK k8scluster "Failed getting events"
 114     track k8scluster k8s_ready_before_helm
 115     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 116 }
 117
 118 # removes osm deployments and services
 119 function install_k8s_metrics() {
 120     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 121     echo "Installing Kubernetes metrics"
 122     kubectl apply -f "https://github.com/kubernetes-sigs/metrics-server/releases/download/${K8S_METRICS_VERSION}/components.yaml"
 123     kubectl -n kube-system patch deployment metrics-server --type=json -p '[{"op":"add","path":"/spec/template/spec/containers/0/args/-","value":"--kubelet-insecure-tls"}]'
 124     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 125 }
 126
 127 # removes osm deployments and services
 128 function remove_k8s_namespace() {
 129     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 130     echo "Deleting existing namespace $1: kubectl delete ns $1"
 131     kubectl delete ns $1 2>/dev/null
 132     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 133 }
 134 # main
 135 OSM_CLUSTER_WORK_DIR="/etc/osm"
 136 OSM_DEVOPS="/usr/share/osm-devops"
 137 DEBUG_INSTALL=""
 138
 139 while getopts ":D:d:-: " o; do
 140     case "${o}" in
 141         d)
 142             OSM_CLUSTER_WORK_DIR="${OPTARG}"
 143             ;;
 144         D)
 145             OSM_DEVOPS="${OPTARG}"
 146             ;;
 147         -)
 148             [ "${OPTARG}" == "debug" ] && DEBUG_INSTALL="y" && continue
 149             echo -e "Invalid option: '--$OPTARG'\n" >&2
 150             exit 1
 151             ;;
 152         :)
 153             echo "Option -$OPTARG requires an argument" >&2
 154             exit 1
 155             ;;
 156         \?)
 157             echo -e "Invalid option: '-$OPTARG'\n" >&2
 158             exit 1
 159             ;;
 160         *)
 161             exit 1
 162             ;;
 163     esac
 164 done
 165
 166 source $OSM_DEVOPS/common/logging
 167 source $OSM_DEVOPS/common/track
 168
 169 echo "DEBUG_INSTALL=$DEBUG_INSTALL"
 170 echo "OSM_DEVOPS=$OSM_DEVOPS"
 171 echo "OSM_CLUSTER_WORK_DIR=$OSM_CLUSTER_WORK_DIR"
 172 echo "HOME=$HOME"
 173
 174 echo "Creating folders for installation"
 175 [ ! -d "$OSM_CLUSTER_WORK_DIR" ] && sudo mkdir -p $OSM_CLUSTER_WORK_DIR
 176 echo "Copying kubeadm-config from $OSM_DEVOPS/installers/kubeadm-config.yaml to $OSM_CLUSTER_WORK_DIR/kubeadm-config.yaml"
 177 sudo cp -b $OSM_DEVOPS/installers/kubeadm-config.yaml $OSM_CLUSTER_WORK_DIR/kubeadm-config.yaml
 178
 179 install_kube
 180 check_and_track_kube_install
 181
 182 init_kubeadm $OSM_CLUSTER_WORK_DIR/kubeadm-config.yaml
 183 save_kubeconfig
 184 check_and_track_init_k8s
 185
 186 deploy_cni_provider
 187 taint_master_node
 188 check_and_track_k8s_ready_before_helm
 189
 190 install_k8s_metrics
 191
 192 remove_k8s_namespace osm
 193
 194 # install_helm has been moved to install_helm_client.sh, run from full_install_osm.sh,
 195 # but tracking is still here because the installation analytics still expects it
 196 track k8scluster install_helm_ok
 197
 198 # Installation of storage class, metallb and cert-manager has been moved
 199 # to install_cluster_addons.sh, run from full_install_osm.sh