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