upgrade k8s vers, and add a script for future upgrades

scripts/change_k8s_version.sh

@@ -0,0 +1,117 @@
+#!/bin/bash
+
+# This file is part of Kargo.
+#
+#    Foobar is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    Foobar is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+
+#color variables
+txtbld=$(tput bold)             # Bold
+bldred=${txtbld}$(tput setaf 1) #  red
+bldgre=${txtbld}$(tput setaf 2) #  green
+bldylw=${txtbld}$(tput setaf 3) #  yellow
+txtrst=$(tput sgr0)             # Reset
+err=${bldred}ERROR${txtrst}
+info=${bldgre}INFO${txtrst}
+warn=${bldylw}WARNING${txtrst}
+
+usage()
+{
+    cat << EOF
+Update ansible playbook with a specific kubernetes version
+
+Usage : $(basename $0) -v <k8s version>
+      -h | --help         : Show this message
+      -i | --init         : Initial upgrade (download binaries)
+      -v | --version      : Kubernetes version
+               
+               ex : switch to kubernetes v1.2.4
+               $(basename $0) -v v1.2.4
+EOF
+}
+
+# Options parsing
+while (($#)); do
+    case "$1" in
+        -h | --help)   usage;   exit 0;;
+        -i | --init) INIT=1; shift;;
+        -v | --version) VERS=${2}; shift 2;;
+        *)
+            usage
+            echo "ERROR : Unknown option"
+            exit 3
+        ;;
+    esac
+done
+
+if [ -z ${VERS} ]; then
+    usage
+    echo -e "\n${err}: The option version must be defined"
+    exit 3
+else
+   if ! [[ ${VERS} =~ ^v[0-9]\.[0-9]\.[0-9]$ ]]; then
+       echo -e "\n${err}: Invalid version format (ex: v1.2.4)"
+       exit 1
+   fi
+fi
+
+UPLOAD_VARFILE="roles/uploads/defaults/main.yml"
+DOWNLOAD_VARFILE="roles/download/defaults/main.yml"
+K8S_BIN="kubelet kubectl kube-apiserver"
+
+if [[ ${INIT} -eq 1 ]]; then
+   DOWNLOAD_URL=https://storage.googleapis.com/kubernetes-release/release/${VERS}/bin/linux/amd64
+   TMP_DIR=$(mktemp -d --tmpdir kubernetes_tmpbin_XXXXXXX)
+   sed -i "s/^hyperkube_image_tag.*$/hyperkube_image_tag: \"${VERS}\"/" roles/kubernetes/node/defaults/main.yml
+   trap 'rm -rf "${tmpdir}"' EXIT
+   cd "${tmpdir}"
+
+   for BIN in ${K8S_BIN}; do
+       curl -s -o ${BIN} ${DOWNLOAD_URL}/${BIN}
+       if [ $? -ne 0 ]; then
+           echo -e "\n${err}: Downloading ${BIN} failed! Try again"
+           exit 1
+       else
+           echo -e "\n${info}: ${BIN} downloaded successfuly"
+       fi
+   done
+
+   for varfile in ${UPLOAD_VARFILE} ${DOWNLOAD_VARFILE}; do
+       sed -i "s/^kube_version.*$/kube_version: \"${VERS}\"/" ${varfile}
+   
+       for BIN in ${K8S_BIN}; do
+           CHECKSUM=$(sha256sum ${BIN} | cut -d' ' -f1)
+           BIN=$(echo ${BIN} | tr '-' '_')
+           sed  -i "s/^${BIN}_checksum.*$/${BIN}_checksum: \"${CHECKSUM}\"/" ${varfile}
+       done
+   done
+   
+   rm -rf "${tmpdir}"
+else
+   CHECKSUM_URL=https://storage.googleapis.com/kargo/${VERS}_k8s-sha256
+   sed -i "s/^hyperkube_image_tag.*$/hyperkube_image_tag: \"${VERS}\"/" roles/kubernetes/node/defaults/main.yml
+    for varfile in ${UPLOAD_VARFILE} ${DOWNLOAD_VARFILE}; do
+        sed -i "s/^kube_version.*$/kube_version: \"${VERS}\"/" ${varfile}
+        for BIN in ${K8S_BIN}; do
+            if [[ "${BIN}" =~ "apiserver" ]]; then
+                BIN="apiserver"
+            fi
+            line=$(curl -sk ${CHECKSUM_URL} | grep ${BIN})
+            CHECKSUM=$(echo ${line} | cut -d':' -f2)
+            if [[ "${BIN}" =~ "apiserver" ]]; then
+                BIN="kube_apiserver"
+            fi
+            sed  -i "s/^${BIN}_checksum.*$/${BIN}_checksum: \"${CHECKSUM}\"/" ${varfile}
+        done
+    done
+fi