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=1.23.3-00
  19
  20 # installs kubernetes packages
  21 function install_kube() {
  22     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  23     # Kubernetes releases can be found here: https://kubernetes.io/releases/
  24     # To check other available versions, run the following command
  25     # curl -s https://packages.cloud.google.com/apt/dists/kubernetes-xenial/main/binary-amd64/Packages | grep Version | awk '{print $2}'
  26     sudo apt-get update && sudo apt-get install -y apt-transport-https
  27     sudo apt-get update && sudo apt-get install -y apt-transport-https
  28     curl -fsSL https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
  29     sudo add-apt-repository "deb https://apt.kubernetes.io/ kubernetes-xenial main"
  30     sudo apt-get update
  31     echo "Installing Kubernetes Packages ..."
  32     sudo apt-get install -y kubelet=${K8S_VERSION} kubeadm=${K8S_VERSION} kubectl=${K8S_VERSION}
  33     cat << EOF | sudo tee -a /etc/default/kubelet
  34 KUBELET_EXTRA_ARGS="--cgroup-driver=cgroupfs"
  35 EOF
  36     sudo apt-mark hold kubelet kubeadm kubectl
  37     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  38 }
  39
  40 # check and track kube packages installation
  41 function check_and_track_kube_install() {
  42     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  43     kubelet_version=$(dpkg -s kubelet|grep Version|awk '{print $2}')
  44     [ -n "${kubelet_version}" ] || FATAL_TRACK k8scluster "Kubelet was not installed."
  45     kubeadm_version=$(dpkg -s kubeadm|grep Version|awk '{print $2}')
  46     [ -n "${kubeadm_version}" ] || FATAL_TRACK k8scluster "Kubeadm was not installed."
  47     kubectl_version=$(dpkg -s kubectl|grep Version|awk '{print $2}')
  48     [ -n "${kubectl_version}" ] || FATAL_TRACK k8scluster "Kubectl was not installed."
  49     track k8scluster install_k8s_ok kubelet ${kubelet_version} none none kubeadm ${kubeadm_version} none none kubectl ${kubectl_version} none none
  50     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  51 }
  52
  53 # initializes kubernetes control plane
  54 function init_kubeadm() {
  55     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  56     sudo swapoff -a
  57     sudo sed -i.bak '/.*none.*swap/s/^\(.*\)$/#\1/g' /etc/fstab
  58     sudo kubeadm init --dry-run || FATAL_TRACK k8scluster "kubeadm init dry-run failed"
  59     sudo kubeadm init --config $1
  60     sleep 5
  61     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  62 }
  63
  64 # Initializes kubeconfig file
  65 function kube_config_dir() {
  66     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  67     K8S_MANIFEST_DIR="/etc/kubernetes/manifests"
  68     [ ! -d $K8S_MANIFEST_DIR ] && FATAL_TRACK k8scluster "Kubernetes folder $K8S_MANIFEST_DIR was not found"
  69     mkdir -p $HOME/.kube
  70     sudo cp /etc/kubernetes/admin.conf $HOME/.kube/config
  71     sudo chown $(id -u):$(id -g) $HOME/.kube/config
  72     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  73 }
  74
  75 # test kubernetes installation
  76 function check_and_track_init_k8s() {
  77     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  78     kubectl get ns || FATAL_TRACK k8scluster "Failed getting namespaces"
  79     track k8scluster init_k8s_ok
  80     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  81 }
  82
  83 # deploys flannel as daemonsets
  84 function deploy_cni_provider() {
  85     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  86     CNI_DIR="$(mktemp -d -q --tmpdir "flannel.XXXXXX")"
  87     trap 'rm -rf "${CNI_DIR}"' EXIT
  88     KUBE_FLANNEL_FILE_URL="https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml"
  89     wget --retry-on-host-error --retry-on-http-error 404,429,503 --tries=5 "${KUBE_FLANNEL_FILE_URL}" -P $CNI_DIR
  90     [ ! -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"
  91     kubectl apply -f $CNI_DIR
  92     [ $? -ne 0 ] && FATAL_TRACK k8scluster "Cannot Install Flannel"
  93     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  94 }
  95
  96 # taints K8s master node
  97 function taint_master_node() {
  98     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  99     K8S_MASTER=$(kubectl get nodes | awk '$3~/master/'| awk '{print $1}')
 100     kubectl taint node $K8S_MASTER node-role.kubernetes.io/master:NoSchedule-
 101     sleep 5
 102     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 103 }
 104
 105 # check and track kube packages installation
 106 function check_and_track_k8s_ready_before_helm() {
 107     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 108     kubectl get events || FATAL_TRACK k8scluster "Failed getting events"
 109     track k8scluster k8s_ready_before_helm
 110     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 111 }
 112
 113 #Install Helm v3
 114 #Helm releases can be found here: https://github.com/helm/helm/releases
 115 function install_helm() {
 116     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 117     HELM_VERSION="v3.7.2"
 118     if ! [[ "$(helm version --short 2>/dev/null)" =~ ^v3.* ]]; then
 119         # Helm is not installed. Install helm
 120         echo "Helm3 is not installed, installing ..."
 121         curl https://get.helm.sh/helm-${HELM_VERSION}-linux-amd64.tar.gz --output helm-${HELM_VERSION}.tar.gz
 122         tar -zxvf helm-${HELM_VERSION}.tar.gz
 123         sudo mv linux-amd64/helm /usr/local/bin/helm
 124         rm -r linux-amd64
 125         rm helm-${HELM_VERSION}.tar.gz
 126     else
 127         echo "Helm3 is already installed. Skipping installation..."
 128     fi
 129     helm version || FATAL_TRACK k8scluster "Could not obtain helm version. Maybe helm client was not installed"
 130     helm repo add stable https://charts.helm.sh/stable || FATAL_TRACK k8scluster "Helm repo stable could not be added"
 131     helm repo update || FATAL_TRACK k8scluster "Helm repo stable could not be updated"
 132     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 133 }
 134
 135 function install_k8s_storageclass() {
 136     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 137     echo "Installing open-iscsi"
 138     sudo apt-get update
 139     sudo apt-get install open-iscsi
 140     sudo systemctl enable --now iscsid
 141     OPENEBS_VERSION="3.1.0"
 142     echo "Installing OpenEBS"
 143     helm repo add openebs https://openebs.github.io/charts
 144     helm repo update
 145     helm install --create-namespace --namespace openebs openebs openebs/openebs --version ${OPENEBS_VERSION}
 146     helm ls -n openebs
 147     local storageclass_timeout=400
 148     local counter=0
 149     local storageclass_ready=""
 150     echo "Waiting for storageclass"
 151     while (( counter < storageclass_timeout ))
 152     do
 153         kubectl get storageclass openebs-hostpath &> /dev/null
 154
 155         if [ $? -eq 0 ] ; then
 156             echo "Storageclass available"
 157             storageclass_ready="y"
 158             break
 159         else
 160             counter=$((counter + 15))
 161             sleep 15
 162         fi
 163     done
 164     [ -n "$storageclass_ready" ] || FATAL_TRACK k8scluster "Storageclass not ready after $storageclass_timeout seconds. Cannot install openebs"
 165     kubectl patch storageclass openebs-hostpath -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'
 166     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 167 }
 168
 169 #installs metallb from helm
 170 function install_helm_metallb() {
 171     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 172     echo "Installing MetalLB"
 173     METALLB_VERSION="0.11.0"
 174     METALLB_IP_RANGE="$DEFAULT_IP/32"
 175     echo "configInline:
 176   address-pools:
 177    - name: default
 178      protocol: layer2
 179      addresses:
 180      - $METALLB_IP_RANGE" | sudo tee -a ${OSM_DOCKER_WORK_DIR}/metallb-config.yaml
 181     helm repo add metallb https://metallb.github.io/metallb
 182     helm repo update
 183     helm install --create-namespace --namespace metallb-system metallb metallb/metallb --version ${METALLB_VERSION} -f ${OSM_DOCKER_WORK_DIR}/metallb-config.yaml
 184     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 185 }
 186
 187 #checks openebs and metallb readiness
 188 function check_for_readiness() {
 189     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 190     # Default input values
 191     sampling_period=2       # seconds
 192     time_for_readiness=20   # seconds ready
 193     time_for_failure=200    # seconds broken
 194     OPENEBS_NAMESPACE=openebs
 195     METALLB_NAMESPACE=metallb-system
 196     # STACK_NAME=osm          # By default, "osm"
 197
 198     # Equivalent number of samples
 199     oks_threshold=$((time_for_readiness/${sampling_period}))     # No. ok samples to declare the system ready
 200     failures_threshold=$((time_for_failure/${sampling_period}))  # No. nok samples to declare the system broken
 201     failures_in_a_row=0
 202     oks_in_a_row=0
 203
 204     ####################################################################################
 205     # Loop to check system readiness
 206     ####################################################################################
 207     while [[ (${failures_in_a_row} -lt ${failures_threshold}) && (${oks_in_a_row} -lt ${oks_threshold}) ]]
 208     do
 209         # State of OpenEBS
 210         OPENEBS_STATE=$(kubectl get pod -n ${OPENEBS_NAMESPACE} --no-headers 2>&1)
 211         OPENEBS_READY=$(echo "${OPENEBS_STATE}" | awk '$2=="1/1" || $2=="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 212         OPENEBS_NOT_READY=$(echo "${OPENEBS_STATE}" | awk '$2!="1/1" && $2!="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 213         COUNT_OPENEBS_READY=$(echo "${OPENEBS_READY}"| grep -v -e '^$' | wc -l)
 214         COUNT_OPENEBS_NOT_READY=$(echo "${OPENEBS_NOT_READY}" | grep -v -e '^$' | wc -l)
 215
 216         # State of MetalLB
 217         METALLB_STATE=$(kubectl get pod -n ${METALLB_NAMESPACE} --no-headers 2>&1)
 218         METALLB_READY=$(echo "${METALLB_STATE}" | awk '$2=="1/1" || $2=="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 219         METALLB_NOT_READY=$(echo "${METALLB_STATE}" | awk '$2!="1/1" && $2!="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 220         COUNT_METALLB_READY=$(echo "${METALLB_READY}" | grep -v -e '^$' | wc -l)
 221         COUNT_METALLB_NOT_READY=$(echo "${METALLB_NOT_READY}" | grep -v -e '^$' | wc -l)
 222
 223         # OK sample
 224         if [[ $((${COUNT_OPENEBS_NOT_READY}+${COUNT_METALLB_NOT_READY})) -eq 0 ]]
 225         then
 226             ((++oks_in_a_row))
 227             failures_in_a_row=0
 228             echo -ne ===\> Successful checks: "${oks_in_a_row}"/${oks_threshold}\\r
 229         # NOK sample
 230         else
 231             ((++failures_in_a_row))
 232             oks_in_a_row=0
 233             echo
 234             echo Bootstraping... "${failures_in_a_row}" checks of ${failures_threshold}
 235
 236             # Reports failed pods in OpenEBS
 237             if [[ "${COUNT_OPENEBS_NOT_READY}" -ne 0 ]]
 238             then
 239                 echo "OpenEBS: Waiting for ${COUNT_OPENEBS_NOT_READY} of $((${COUNT_OPENEBS_NOT_READY}+${COUNT_OPENEBS_READY})) pods to be ready:"
 240                 echo "${OPENEBS_NOT_READY}"
 241                 echo
 242             fi
 243
 244             # Reports failed statefulsets
 245             if [[ "${COUNT_METALLB_NOT_READY}" -ne 0 ]]
 246             then
 247                 echo "MetalLB: Waiting for ${COUNT_METALLB_NOT_READY} of $((${COUNT_METALLB_NOT_READY}+${COUNT_METALLB_READY})) pods to be ready:"
 248                 echo "${METALLB_NOT_READY}"
 249                 echo
 250             fi
 251         fi
 252
 253         #------------ NEXT SAMPLE
 254         sleep ${sampling_period}
 255     done
 256
 257     ####################################################################################
 258     # OUTCOME
 259     ####################################################################################
 260     if [[ (${failures_in_a_row} -ge ${failures_threshold}) ]]
 261     then
 262         echo
 263         FATAL_TRACK k8scluster "K8S CLUSTER IS BROKEN"
 264     else
 265         echo
 266         echo "K8S CLUSTER IS READY"
 267     fi
 268     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 269 }
 270
 271 #removes osm deployments and services
 272 function remove_k8s_namespace() {
 273     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 274     kubectl delete ns $1 2>&1 >/dev/null
 275     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 276 }
 277
 278 # main
 279 while getopts ":D:d:i:-: " o; do
 280     case "${o}" in
 281         i)
 282             DEFAULT_IP="${OPTARG}"
 283             ;;
 284         d)
 285             OSM_DOCKER_WORK_DIR="${OPTARG}"
 286             ;;
 287         D)
 288             OSM_DEVOPS="${OPTARG}"
 289             ;;
 290         -)
 291             [ "${OPTARG}" == "debug" ] && DEBUG_INSTALL="y" && continue
 292             echo -e "Invalid option: '--$OPTARG'\n" >&2
 293             exit 1
 294             ;;
 295         :)
 296             echo "Option -$OPTARG requires an argument" >&2
 297             exit 1
 298             ;;
 299         \?)
 300             echo -e "Invalid option: '-$OPTARG'\n" >&2
 301             exit 1
 302             ;;
 303         *)
 304             exit 1
 305             ;;
 306     esac
 307 done
 308
 309 source $OSM_DEVOPS/common/logging
 310 source $OSM_DEVOPS/common/track
 311
 312 echo "DEBUG_INSTALL=$DEBUG_INSTALL"
 313 echo "DEFAULT_IP=$DEFAULT_IP"
 314 echo "OSM_DEVOPS=$OSM_DEVOPS"
 315 echo "OSM_DOCKER_WORK_DIR=$OSM_DOCKER_WORK_DIR"
 316 echo "INSTALL_K8S_MONITOR=$INSTALL_K8S_MONITOR"
 317 echo "HOME=$HOME"
 318
 319
 320 install_kube
 321 check_and_track_kube_install
 322
 323 init_kubeadm $OSM_DOCKER_WORK_DIR/cluster-config.yaml
 324 kube_config_dir
 325 check_and_track_init_k8s
 326
 327 if [ -n "$INSTALL_K8S_MONITOR" ]; then
 328     # uninstall OSM MONITORING
 329     uninstall_k8s_monitoring
 330     track k8scluster uninstall_k8s_monitoring_ok
 331 fi
 332
 333 remove_k8s_namespace osm
 334 deploy_cni_provider
 335 taint_master_node
 336 check_and_track_k8s_ready_before_helm
 337
 338 install_helm
 339 track k8scluster install_helm_ok
 340
 341 install_k8s_storageclass
 342 track k8scluster k8s_storageclass_ok
 343 install_helm_metallb
 344 track k8scluster k8s_metallb_ok
 345 check_for_readiness
 346 track k8scluster k8s_ready_ok
 347