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=1.23.3-00
  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     cat << EOF | sudo tee -a /etc/default/kubelet
  32     KUBELET_EXTRA_ARGS="--cgroup-driver=cgroupfs"
  33 EOF
  34     sudo apt-mark hold kubelet kubeadm kubectl
  35     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  36 }
  37
  38 #initializes kubernetes control plane
  39 function init_kubeadm() {
  40     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  41     sudo swapoff -a
  42     sudo sed -i.bak '/.*none.*swap/s/^\(.*\)$/#\1/g' /etc/fstab
  43     sudo kubeadm init --config $1
  44     sleep 5
  45     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  46 }
  47
  48 function kube_config_dir() {
  49     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  50     K8S_MANIFEST_DIR="/etc/kubernetes/manifests"
  51     [ ! -d $K8S_MANIFEST_DIR ] && FATAL "Cannot Install Kubernetes"
  52     mkdir -p $HOME/.kube
  53     sudo cp /etc/kubernetes/admin.conf $HOME/.kube/config
  54     sudo chown $(id -u):$(id -g) $HOME/.kube/config
  55     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  56 }
  57
  58 #deploys flannel as daemonsets
  59 function deploy_cni_provider() {
  60     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  61     CNI_DIR="$(mktemp -d -q --tmpdir "flannel.XXXXXX")"
  62     trap 'rm -rf "${CNI_DIR}"' EXIT
  63     wget -q https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml -P $CNI_DIR
  64     kubectl apply -f $CNI_DIR
  65     [ $? -ne 0 ] && FATAL "Cannot Install Flannel"
  66     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  67 }
  68
  69 #taints K8s master node
  70 function taint_master_node() {
  71     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  72     K8S_MASTER=$(kubectl get nodes | awk '$3~/master/'| awk '{print $1}')
  73     kubectl taint node $K8S_MASTER node-role.kubernetes.io/master:NoSchedule-
  74     sleep 5
  75     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  76 }
  77
  78 #Install Helm v3
  79 function install_helm() {
  80     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  81     helm > /dev/null 2>&1
  82     if [ $? != 0 ] ; then
  83         # Helm is not installed. Install helm
  84         echo "Helm is not installed, installing ..."
  85         curl https://get.helm.sh/helm-v3.6.3-linux-amd64.tar.gz --output helm-v3.6.3.tar.gz
  86         tar -zxvf helm-v3.6.3.tar.gz
  87         sudo mv linux-amd64/helm /usr/local/bin/helm
  88         rm -r linux-amd64
  89         rm helm-v3.6.3.tar.gz
  90         helm repo add stable https://charts.helm.sh/stable
  91         helm repo update
  92     fi
  93     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  94 }
  95
  96 function install_k8s_storageclass() {
  97     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  98     echo "Installing open-iscsi"
  99     sudo apt-get update
 100     sudo apt-get install open-iscsi
 101     sudo systemctl enable --now iscsid
 102     OPENEBS_VERSION="3.1.0"
 103     echo "Installing OpenEBS"
 104     helm repo add openebs https://openebs.github.io/charts
 105     helm repo update
 106     helm install --create-namespace --namespace openebs openebs openebs/openebs --version ${OPENEBS_VERSION}
 107     helm ls -n openebs
 108     local storageclass_timeout=400
 109     local counter=0
 110     local storageclass_ready=""
 111     echo "Waiting for storageclass"
 112     while (( counter < storageclass_timeout ))
 113     do
 114         kubectl get storageclass openebs-hostpath &> /dev/null
 115
 116         if [ $? -eq 0 ] ; then
 117             echo "Storageclass available"
 118             storageclass_ready="y"
 119             break
 120         else
 121             counter=$((counter + 15))
 122             sleep 15
 123         fi
 124     done
 125     [ -n "$storageclass_ready" ] || FATAL "Storageclass not ready after $storageclass_timeout seconds. Cannot install openebs"
 126     kubectl patch storageclass openebs-hostpath -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'
 127     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 128 }
 129
 130 #installs metallb from helm
 131 function install_helm_metallb() {
 132     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 133     echo "Installing MetalLB"
 134     METALLB_VERSION="0.11.0"
 135     METALLB_IP_RANGE="$DEFAULT_IP/32"
 136     echo "configInline:
 137   address-pools:
 138    - name: default
 139      protocol: layer2
 140      addresses:
 141      - $METALLB_IP_RANGE" | sudo tee -a ${OSM_DOCKER_WORK_DIR}/metallb-config.yaml
 142     helm repo add metallb https://metallb.github.io/metallb
 143     helm repo update
 144     helm install --create-namespace --namespace metallb-system metallb metallb/metallb --version ${METALLB_VERSION} -f ${OSM_DOCKER_WORK_DIR}/metallb-config.yaml
 145     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 146 }
 147
 148 #checks openebs and metallb readiness
 149 function check_for_readiness() {
 150     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 151     # Default input values
 152     sampling_period=2       # seconds
 153     time_for_readiness=20   # seconds ready
 154     time_for_failure=200    # seconds broken
 155     OPENEBS_NAMESPACE=openebs
 156     METALLB_NAMESPACE=metallb-system
 157     # STACK_NAME=osm          # By default, "osm"
 158
 159     # Equivalent number of samples
 160     oks_threshold=$((time_for_readiness/${sampling_period}))     # No. ok samples to declare the system ready
 161     failures_threshold=$((time_for_failure/${sampling_period}))  # No. nok samples to declare the system broken
 162     failures_in_a_row=0
 163     oks_in_a_row=0
 164
 165     ####################################################################################
 166     # Loop to check system readiness
 167     ####################################################################################
 168     while [[ (${failures_in_a_row} -lt ${failures_threshold}) && (${oks_in_a_row} -lt ${oks_threshold}) ]]
 169     do
 170         # State of OpenEBS
 171         OPENEBS_STATE=$(kubectl get pod -n ${OPENEBS_NAMESPACE} --no-headers 2>&1)
 172         OPENEBS_READY=$(echo "${OPENEBS_STATE}" | awk '$2=="1/1" || $2=="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 173         OPENEBS_NOT_READY=$(echo "${OPENEBS_STATE}" | awk '$2!="1/1" && $2!="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 174         COUNT_OPENEBS_READY=$(echo "${OPENEBS_READY}"| grep -v -e '^$' | wc -l)
 175         COUNT_OPENEBS_NOT_READY=$(echo "${OPENEBS_NOT_READY}" | grep -v -e '^$' | wc -l)
 176
 177         # State of MetalLB
 178         METALLB_STATE=$(kubectl get pod -n ${METALLB_NAMESPACE} --no-headers 2>&1)
 179         METALLB_READY=$(echo "${METALLB_STATE}" | awk '$2=="1/1" || $2=="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 180         METALLB_NOT_READY=$(echo "${METALLB_STATE}" | awk '$2!="1/1" && $2!="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 181         COUNT_METALLB_READY=$(echo "${METALLB_READY}" | grep -v -e '^$' | wc -l)
 182         COUNT_METALLB_NOT_READY=$(echo "${METALLB_NOT_READY}" | grep -v -e '^$' | wc -l)
 183
 184         # OK sample
 185         if [[ $((${COUNT_OPENEBS_NOT_READY}+${COUNT_METALLB_NOT_READY})) -eq 0 ]]
 186         then
 187             ((++oks_in_a_row))
 188             failures_in_a_row=0
 189             echo -ne ===\> Successful checks: "${oks_in_a_row}"/${oks_threshold}\\r
 190         # NOK sample
 191         else
 192             ((++failures_in_a_row))
 193             oks_in_a_row=0
 194             echo
 195             echo Bootstraping... "${failures_in_a_row}" checks of ${failures_threshold}
 196
 197             # Reports failed pods in OpenEBS
 198             if [[ "${COUNT_OPENEBS_NOT_READY}" -ne 0 ]]
 199             then
 200                 echo "OpenEBS: Waiting for ${COUNT_OPENEBS_NOT_READY} of $((${COUNT_OPENEBS_NOT_READY}+${COUNT_OPENEBS_READY})) pods to be ready:"
 201                 echo "${OPENEBS_NOT_READY}"
 202                 echo
 203             fi
 204
 205             # Reports failed statefulsets
 206             if [[ "${COUNT_METALLB_NOT_READY}" -ne 0 ]]
 207             then
 208                 echo "MetalLB: Waiting for ${COUNT_METALLB_NOT_READY} of $((${COUNT_METALLB_NOT_READY}+${COUNT_METALLB_READY})) pods to be ready:"
 209                 echo "${METALLB_NOT_READY}"
 210                 echo
 211             fi
 212         fi
 213
 214         #------------ NEXT SAMPLE
 215         sleep ${sampling_period}
 216     done
 217
 218     ####################################################################################
 219     # OUTCOME
 220     ####################################################################################
 221     if [[ (${failures_in_a_row} -ge ${failures_threshold}) ]]
 222     then
 223         echo
 224         FATAL "K8S CLUSTER IS BROKEN"
 225     else
 226         echo
 227         echo "K8S CLUSTER IS READY"
 228     fi
 229     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 230 }
 231
 232 #removes osm deployments and services
 233 function remove_k8s_namespace() {
 234     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 235     kubectl delete ns $1
 236     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 237 }
 238
 239 # main
 240 while getopts ":D:d:i:-: " o; do
 241     case "${o}" in
 242         i)
 243             DEFAULT_IP="${OPTARG}"
 244             ;;
 245         d)
 246             OSM_DOCKER_WORK_DIR="${OPTARG}"
 247             ;;
 248         D)
 249             OSM_DEVOPS="${OPTARG}"
 250             ;;
 251         -)
 252             [ "${OPTARG}" == "debug" ] && DEBUG_INSTALL="y" && continue
 253             echo -e "Invalid option: '--$OPTARG'\n" >&2
 254             exit 1
 255             ;;
 256         :)
 257             echo "Option -$OPTARG requires an argument" >&2
 258             exit 1
 259             ;;
 260         \?)
 261             echo -e "Invalid option: '-$OPTARG'\n" >&2
 262             exit 1
 263             ;;
 264         *)
 265             exit 1
 266             ;;
 267     esac
 268 done
 269
 270 source $OSM_DEVOPS/common/logging
 271 source $OSM_DEVOPS/common/track
 272
 273 echo "DEBUG_INSTALL=$DEBUG_INSTALL"
 274 echo "DEFAULT_IP=$DEFAULT_IP"
 275 echo "OSM_DEVOPS=$OSM_DEVOPS"
 276 echo "OSM_DOCKER_WORK_DIR=$OSM_DOCKER_WORK_DIR"
 277 echo "INSTALL_K8S_MONITOR=$INSTALL_K8S_MONITOR"
 278 echo "HOME=$HOME"
 279
 280
 281 install_kube
 282 track k8scluster install_k8s_ok
 283 init_kubeadm $OSM_DOCKER_WORK_DIR/cluster-config.yaml
 284 kube_config_dir
 285 track k8scluster init_k8s_ok
 286 if [ -n "$INSTALL_K8S_MONITOR" ]; then
 287     # uninstall OSM MONITORING
 288     uninstall_k8s_monitoring
 289     track k8scluster uninstall_k8s_monitoring_ok
 290 fi
 291 #remove old namespace
 292 remove_k8s_namespace osm
 293 deploy_cni_provider
 294 taint_master_node
 295 install_helm
 296 track k8scluster install_helm_ok
 297 install_k8s_storageclass
 298 track k8scluster k8s_storageclass_ok
 299 install_helm_metallb
 300 track k8scluster k8s_metallb_ok
 301 check_for_readiness
 302 track k8scluster k8s_ready_ok
 303