Generate config map for Sloth SLO definitions using Customise

generate-slo-configmap.sh

sloth_version="0.8.0"

# get the name of the operating system
platform='unknown'
unamestr=`uname`
if [[ "$unamestr" == 'Linux' ]]; then
    platform='linux'
    elif [[ "$unamestr" == 'FreeBSD' ]]; then
    platform='freebsd'
    elif [[ "$unamestr" == 'Darwin' ]]; then
    platform='darwin'
    elif [[ "$unamestr" == 'WindowsNT' ]]; then
    platform='darwin'
fi

# get the cpu type
arch='unknown'
unamepstr=`uname -m`
if [[ "$unamepstr" == 'armv7l' ]]; then
    arch='arm64'
    elif [[ "$unamepstr" == 'x86_64' ]]; then
    arch='amd64'
    elif [[ "$unamepstr" == 'aarch64' ]]; then
    arch='amd64'
fi


download_url="https://github.com/slok/sloth/releases/download/v${sloth_version}/sloth-${platform}-${arch}"

# Download the bundled Sloth from Github
if [[ -f ./sloth ]]; then
    echo "Sloth binary found."
else
    echo "Fetching Sloth from ${download_url}..."
    wget -O sloth $download_url

    chmod +x ./sloth
fi;

{
    printf "generatorOptions:\n"
    printf "  disableNameSuffixHash: true\n\n"
    printf "commonAnnotations:\n"
    printf "  argocd.argoproj.io/sync-options: Replace=true\n"

    printf "configMapgenerator:\n"
    printf "  - name: thanos-ruler-slos-config-provider\n"
    printf "    files:\n"
    for entry in "./service-level-objectives"/*.yml
    do
        SLO_FILENAME=`basename $entry`
        SLO_FILE_PATH="./service-level-objectives/_generated/$SLO_FILENAME"
        ./sloth generate -i $entry -o ./service-level-objectives/_generated/$SLO_FILENAME --no-log
        SLO_OUTPUT=`./sloth generate -i $entry --no-log`
        echo "      - ./_generated/$SLO_FILENAME"
    done
} >service-level-objectives/kustomization.yaml

kustomize build service-level-objectives --load-restrictor LoadRestrictionsNone > slo-cm.yaml

rm service-level-objectives/kustomization.yaml