kola/tests/kubeadm: Add a helper script for getting checksums

Invoke the script to get checksums for all the tested k8s versions,
call with -N to get only for the first N listed k8s versions (so
currently calling it with -1 will get checksums for k8s 1.25.0).

kola/tests/kubeadm/checksums.sh

@@ -0,0 +1,113 @@
+#!/bin/bash
+
+set -euo pipefail
+
+fail() {
+    IFS=' ' echo "$*" >&2
+    exit 1
+}
+
+# no limit by default
+limit=''
+for arg; do
+    case "${arg}" in
+        -h|--help)
+            echo 'Prints various checksums of binaries used in kubeadm tests.
+
+Parameters:
+  -h --help                 Print this help.
+  -N, where N is a number   Print checksums only for the first N entries
+                            in the testConfig map in kubeadm.go.
+
+Workflow when updating a version of Kubernetes or other binaries:
+- update versions in a chosen entry in the testConfig map in kubeadm.go
+- run the script
+- paste the checksums into appriopriate places in the modified entry in kubeadm.go
+
+Workflow when adding a new Kubernetes version to test:
+- copy the first entry in testConfig in kubeadm.go
+- update the versions in the new entry
+- leave the checksums as they are
+- run the script
+- paste the checksums into appriopriate places in the new entry in kubeadm.go
+'
+            exit 0
+            ;;
+        -*)
+            if [[ ! "${1}" =~ ^-[0-9]+$ ]]; then
+                fail 'Invalid flag to limit k8s versions, must be in form of -<number>.'
+            fi
+            limit="${1//-/}"
+            ;;
+        *)
+            fail "Unknown argument '${arg}', call the script with -h to see the synopsis."
+            ;;
+    esac
+done
+
+tuples=(
+    "KubeadmSum^https://storage.googleapis.com/kubernetes-release/release/%K8S_VER%/bin/linux/%ARCH%/kubeadm"
+    "KubeletSum^https://storage.googleapis.com/kubernetes-release/release/%K8S_VER%/bin/linux/%ARCH%/kubelet"
+    "CRIctlSum^https://github.com/kubernetes-sigs/cri-tools/releases/download/%CRICTL_VER%/crictl-%CRICTL_VER%-linux-%ARCH%.tar.gz"
+    "CNISum^https://github.com/containernetworking/plugins/releases/download/%CNI_VER%/cni-plugins-linux-%ARCH%-%CNI_VER%.tgz"
+    "KubectlSum^https://storage.googleapis.com/kubernetes-release/release/%K8S_VER%/bin/linux/%ARCH%/kubectl"
+)
+
+this_dir=$(dirname "${0}")
+kubeadm_go="${this_dir}/kubeadm.go"
+version_pattern='v[0-9]\+\.[0-9]\+\.[0-9]\+'
+
+get_full_pattern() {
+    string_type="\[string\]"
+    if [[ "${1}" = '-F' ]]; then
+        string_type="[string]"
+        shift
+    fi
+    local version_part="${1}"; shift
+    echo "\"${version_part}\": map${string_type}interface{}{"
+}
+
+full_pattern=$(get_full_pattern "${version_pattern}")
+
+k8s_releases=( $(grep -e "${full_pattern}" "${kubeadm_go}" | grep -oe "${version_pattern}") )
+
+do_subs() {
+    local template="${1}"; shift
+    local key
+    local value
+    local -a kva
+    local result="${template}"
+
+    for kv; do
+        kva=( ${kv//:/ } )
+        key="%${kva[0]}%"
+        value="${kva[1]}"
+        result="${result//${key}/${value}}"
+    done
+
+    echo "${result}"
+}
+
+counter=0
+for k8s_release in "${k8s_releases[@]}"; do
+    if [[ -n "${limit}" ]] && [[ ! ${counter} -lt ${limit} ]]; then
+        break
+    fi
+    ((++counter))
+    fixed_pattern=$(get_full_pattern -F "${k8s_release}")
+    output=$(grep -F -A 14 -e "${fixed_pattern}" "${kubeadm_go}")
+    cni_version=$(grep -F CNIVersion <<<"${output}" | sed -e 's/.*":\s\+"\([^"]\+\)".*/\1/')
+    crictl_version=$(grep -F CRIctlVersion <<<"${output}" | sed -e 's/.*":\s\+"\([^"]\+\)".*/\1/')
+    for arch in arm64 amd64; do
+        echo "K8s ${k8s_release}, arch ${arch}"
+        for tuple in "${tuples[@]}"; do
+            tuple=( ${tuple//^/ } )
+            key="${tuple[0]}"
+            url_template="${tuple[1]}"
+            url=$(do_subs "${url_template}" "K8S_VER:${k8s_release}" "ARCH:${arch}" "CNI_VER:${cni_version}" "CRICTL_VER:${crictl_version}")
+            sum=$(curl -s -S -f -L "${url}" | sha512sum | cut -f1 -d' ')
+            echo "\"${key}\": \"${sum}\","
+        done
+        echo
+    done
+done