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 #installs kubernetes packages
  19 function install_kube() {
  20     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  21     K8S_VERSION=1.20.11-00
  22     # To check other available versions, run the following command
  23     # curl -s https://packages.cloud.google.com/apt/dists/kubernetes-xenial/main/binary-amd64/Packages | grep Version | awk '{print $2}'
  24     sudo apt-get update && sudo apt-get install -y apt-transport-https
  25     sudo apt-get update && sudo apt-get install -y apt-transport-https
  26     curl -fsSL https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
  27     sudo add-apt-repository "deb https://apt.kubernetes.io/ kubernetes-xenial main"
  28     sudo apt-get update
  29     echo "Installing Kubernetes Packages ..."
  30     sudo apt-get install -y kubelet=${K8S_VERSION} kubeadm=${K8S_VERSION} kubectl=${K8S_VERSION}
  31     sudo apt-mark hold kubelet kubeadm kubectl
  32     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  33 }
  34
  35 #initializes kubernetes control plane
  36 function init_kubeadm() {
  37     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  38     sudo swapoff -a
  39     sudo sed -i.bak '/.*none.*swap/s/^\(.*\)$/#\1/g' /etc/fstab
  40     sudo kubeadm init --config $1
  41     sleep 5
  42     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  43 }
  44
  45 function kube_config_dir() {
  46     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  47     K8S_MANIFEST_DIR="/etc/kubernetes/manifests"
  48     [ ! -d $K8S_MANIFEST_DIR ] && FATAL "Cannot Install Kubernetes"
  49     mkdir -p $HOME/.kube
  50     sudo cp /etc/kubernetes/admin.conf $HOME/.kube/config
  51     sudo chown $(id -u):$(id -g) $HOME/.kube/config
  52     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  53 }
  54
  55 #deploys flannel as daemonsets
  56 function deploy_cni_provider() {
  57     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  58     CNI_DIR="$(mktemp -d -q --tmpdir "flannel.XXXXXX")"
  59     trap 'rm -rf "${CNI_DIR}"' EXIT
  60     wget -q https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml -P $CNI_DIR
  61     kubectl apply -f $CNI_DIR
  62     [ $? -ne 0 ] && FATAL "Cannot Install Flannel"
  63     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  64 }
  65
  66 #taints K8s master node
  67 function taint_master_node() {
  68     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  69     K8S_MASTER=$(kubectl get nodes | awk '$3~/master/'| awk '{print $1}')
  70     kubectl taint node $K8S_MASTER node-role.kubernetes.io/master:NoSchedule-
  71     sleep 5
  72     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  73 }
  74
  75 #Install Helm v3
  76 function install_helm() {
  77     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  78     helm > /dev/null 2>&1
  79     if [ $? != 0 ] ; then
  80         # Helm is not installed. Install helm
  81         echo "Helm is not installed, installing ..."
  82         curl https://get.helm.sh/helm-v3.6.3-linux-amd64.tar.gz --output helm-v3.6.3.tar.gz
  83         tar -zxvf helm-v3.6.3.tar.gz
  84         sudo mv linux-amd64/helm /usr/local/bin/helm
  85         rm -r linux-amd64
  86         rm helm-v3.6.3.tar.gz
  87         helm repo add stable https://charts.helm.sh/stable
  88         helm repo update
  89     fi
  90     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  91 }
  92
  93 function install_k8s_storageclass() {
  94     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  95     OPENEBS_VERSION="1.12.0"
  96     echo "Installing OpenEBS"
  97     helm repo add openebs https://openebs.github.io/charts
  98     helm repo update
  99     helm install --create-namespace --namespace openebs openebs openebs/openebs --version ${OPENEBS_VERSION}
 100     helm ls -n openebs
 101     local storageclass_timeout=400
 102     local counter=0
 103     local storageclass_ready=""
 104     echo "Waiting for storageclass"
 105     while (( counter < storageclass_timeout ))
 106     do
 107         kubectl get storageclass openebs-hostpath &> /dev/null
 108
 109         if [ $? -eq 0 ] ; then
 110             echo "Storageclass available"
 111             storageclass_ready="y"
 112             break
 113         else
 114             counter=$((counter + 15))
 115             sleep 15
 116         fi
 117     done
 118     [ -n "$storageclass_ready" ] || FATAL "Storageclass not ready after $storageclass_timeout seconds. Cannot install openebs"
 119     kubectl patch storageclass openebs-hostpath -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'
 120     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 121 }
 122
 123 #installs metallb from helm
 124 function install_helm_metallb() {
 125     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 126     echo "Installing MetalLB"
 127     METALLB_VERSION="0.11.0"
 128     METALLB_IP_RANGE="$DEFAULT_IP/32"
 129     echo "configInline:
 130   address-pools:
 131    - name: default
 132      protocol: layer2
 133      addresses:
 134      - $METALLB_IP_RANGE" | sudo tee -a ${OSM_DOCKER_WORK_DIR}/metallb-config.yaml
 135     helm repo add metallb https://metallb.github.io/metallb
 136     helm repo update
 137     helm install --create-namespace --namespace metallb-system metallb metallb/metallb --version ${METALLB_VERSION} -f ${OSM_DOCKER_WORK_DIR}/metallb-config.yaml
 138     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 139 }
 140
 141 #checks openebs and metallb readiness
 142 function check_for_readiness() {
 143     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 144     # Default input values
 145     sampling_period=2       # seconds
 146     time_for_readiness=20   # seconds ready
 147     time_for_failure=200    # seconds broken
 148     OPENEBS_NAMESPACE=openebs
 149     METALLB_NAMESPACE=metallb-system
 150     # STACK_NAME=osm          # By default, "osm"
 151
 152     # Equivalent number of samples
 153     oks_threshold=$((time_for_readiness/${sampling_period}))     # No. ok samples to declare the system ready
 154     failures_threshold=$((time_for_failure/${sampling_period}))  # No. nok samples to declare the system broken
 155     failures_in_a_row=0
 156     oks_in_a_row=0
 157
 158     ####################################################################################
 159     # Loop to check system readiness
 160     ####################################################################################
 161     while [[ (${failures_in_a_row} -lt ${failures_threshold}) && (${oks_in_a_row} -lt ${oks_threshold}) ]]
 162     do
 163         # State of OpenEBS
 164         OPENEBS_STATE=$(kubectl get pod -n ${OPENEBS_NAMESPACE} --no-headers 2>&1)
 165         OPENEBS_READY=$(echo "${OPENEBS_STATE}" | awk '$2=="1/1" || $2=="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 166         OPENEBS_NOT_READY=$(echo "${OPENEBS_STATE}" | awk '$2!="1/1" && $2!="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 167         COUNT_OPENEBS_READY=$(echo "${OPENEBS_READY}"| grep -v -e '^$' | wc -l)
 168         COUNT_OPENEBS_NOT_READY=$(echo "${OPENEBS_NOT_READY}" | grep -v -e '^$' | wc -l)
 169
 170         # State of MetalLB
 171         METALLB_STATE=$(kubectl get pod -n ${METALLB_NAMESPACE} --no-headers 2>&1)
 172         METALLB_READY=$(echo "${METALLB_STATE}" | awk '$2=="1/1" || $2=="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 173         METALLB_NOT_READY=$(echo "${METALLB_STATE}" | awk '$2!="1/1" && $2!="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 174         COUNT_METALLB_READY=$(echo "${METALLB_READY}" | grep -v -e '^$' | wc -l)
 175         COUNT_METALLB_NOT_READY=$(echo "${METALLB_NOT_READY}" | grep -v -e '^$' | wc -l)
 176
 177         # OK sample
 178         if [[ $((${COUNT_OPENEBS_NOT_READY}+${COUNT_METALLB_NOT_READY})) -eq 0 ]]
 179         then
 180             ((++oks_in_a_row))
 181             failures_in_a_row=0
 182             echo -ne ===\> Successful checks: "${oks_in_a_row}"/${oks_threshold}\\r
 183         # NOK sample
 184         else
 185             ((++failures_in_a_row))
 186             oks_in_a_row=0
 187             echo
 188             echo Bootstraping... "${failures_in_a_row}" checks of ${failures_threshold}
 189
 190             # Reports failed pods in OpenEBS
 191             if [[ "${COUNT_OPENEBS_NOT_READY}" -ne 0 ]]
 192             then
 193                 echo "OpenEBS: Waiting for ${COUNT_OPENEBS_NOT_READY} of $((${COUNT_OPENEBS_NOT_READY}+${COUNT_OPENEBS_READY})) pods to be ready:"
 194                 echo "${OPENEBS_NOT_READY}"
 195                 echo
 196             fi
 197
 198             # Reports failed statefulsets
 199             if [[ "${COUNT_METALLB_NOT_READY}" -ne 0 ]]
 200             then
 201                 echo "MetalLB: Waiting for ${COUNT_METALLB_NOT_READY} of $((${COUNT_METALLB_NOT_READY}+${COUNT_METALLB_READY})) pods to be ready:"
 202                 echo "${METALLB_NOT_READY}"
 203                 echo
 204             fi
 205         fi
 206
 207         #------------ NEXT SAMPLE
 208         sleep ${sampling_period}
 209     done
 210
 211     ####################################################################################
 212     # OUTCOME
 213     ####################################################################################
 214     if [[ (${failures_in_a_row} -ge ${failures_threshold}) ]]
 215     then
 216         echo
 217         FATAL "K8S CLUSTER IS BROKEN"
 218     else
 219         echo
 220         echo "K8S CLUSTER IS READY"
 221     fi
 222     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 223 }
 224
 225 #removes osm deployments and services
 226 function remove_k8s_namespace() {
 227     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 228     kubectl delete ns $1
 229     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 230 }
 231
 232 # main
 233 while getopts ":D:d:i:-: " o; do
 234     case "${o}" in
 235         i)
 236             DEFAULT_IP="${OPTARG}"
 237             ;;
 238         d)
 239             OSM_DOCKER_WORK_DIR="${OPTARG}"
 240             ;;
 241         D)
 242             OSM_DEVOPS="${OPTARG}"
 243             ;;
 244         -)
 245             [ "${OPTARG}" == "debug" ] && DEBUG_INSTALL="y" && continue
 246             echo -e "Invalid option: '--$OPTARG'\n" >&2
 247             exit 1
 248             ;;
 249         :)
 250             echo "Option -$OPTARG requires an argument" >&2
 251             exit 1
 252             ;;
 253         \?)
 254             echo -e "Invalid option: '-$OPTARG'\n" >&2
 255             exit 1
 256             ;;
 257         *)
 258             exit 1
 259             ;;
 260     esac
 261 done
 262
 263 source $OSM_DEVOPS/common/logging
 264 source $OSM_DEVOPS/common/track
 265
 266 echo "DEBUG_INSTALL=$DEBUG_INSTALL"
 267 echo "DEFAULT_IP=$DEFAULT_IP"
 268 echo "OSM_DEVOPS=$OSM_DEVOPS"
 269 echo "OSM_DOCKER_WORK_DIR=$OSM_DOCKER_WORK_DIR"
 270 echo "INSTALL_K8S_MONITOR=$INSTALL_K8S_MONITOR"
 271 echo "HOME=$HOME"
 272
 273
 274 install_kube
 275 track k8scluster install_k8s_ok
 276 init_kubeadm $OSM_DOCKER_WORK_DIR/cluster-config.yaml
 277 kube_config_dir
 278 track k8scluster init_k8s_ok
 279 if [ -n "$INSTALL_K8S_MONITOR" ]; then
 280     # uninstall OSM MONITORING
 281     uninstall_k8s_monitoring
 282     track k8scluster uninstall_k8s_monitoring_ok
 283 fi
 284 #remove old namespace
 285 remove_k8s_namespace osm
 286 deploy_cni_provider
 287 taint_master_node
 288 install_helm
 289 track k8scluster install_helm_ok
 290 install_k8s_storageclass
 291 track k8scluster k8s_storageclass_ok
 292 install_helm_metallb
 293 track k8scluster k8s_metallb_ok
 294 check_for_readiness
 295 track k8scluster k8s_ready_ok
 296