prometheus query helpers (uses curl and jq)

prom-helpers.sh

prom-query () { 
    local tmp=$(mktemp -t prom-query.XXXXXX)
    curl -Ggs cakepile.local:8001/api/v1/namespaces/monitoring/services/prometheus-k8s:web/proxy/api/v1/query --data-urlencode query="$1" >$tmp
    if jq -e '.status=="error"' <$tmp >/dev/null; then
        jq <$tmp >&2 -r .error
        rm -f $tmp
        return 1
    fi
    jq <$tmp '.data.result[]'
    rm -f $tmp
}

prom-drop-labels () { 
    local jlabels=$(printf '%s\0' "$@" | jq -Rc 'split("\u0000") | [.[] | {key: ., value: 1}] | from_entries');
    jq --argjson labels "$jlabels" '.metric |= ([to_entries[] | select(.key | in($labels) | not)] | from_entries)'
}

prom-keep () { 
    local jlabels=$(printf '%s\0' "$@" | jq -Rc 'split("\u0000") | [.[] | {key: ., value: 1}] | from_entries');
    jq --argjson labels "$jlabels" '.metric |= ([to_entries[] | select(.key | in($labels))] | from_entries)'
}

prom-list () { 
    jq -r '"\(.metric | "\(.__name__//""){\(del(.__name__) | [to_entries[] | "\(.key)=\(.value | @json)"] | join(","))}")\t\(.value[0] | todate)\t\(.value[1])"'
}

prom-list-labels () { 
    jq -r '.metric | "\(.__name__//""){\(del(.__name__) | [to_entries[] | "\(.key)=\(.value | @json)"] | join(","))}"' | sort -u
}

prom-list-names () { 
    jq -r '.metric.__name__' | sort -u
}