Kubernetes support

* Total CPU and Memory usage for the entire cluster
* Total CPU and Memory usage for kubernetes pods
* Service discovery via annotations on ingress
* No storage stats yet
* No network stats yet

src/widgets/kubernetes/component.jsx

@@ -0,0 +1,54 @@
+import useSWR from "swr";
+import { useTranslation } from "next-i18next";
+
+import Container from "components/services/widget/container";
+import Block from "components/services/widget/block";
+
+export default function Component({ service }) {
+  const { t } = useTranslation();
+
+  const { widget } = service;
+
+  const { data: statusData, error: statusError } = useSWR(
+    `/api/kubernetes/status/${widget.namespace}/${widget.app}`);
+
+  const { data: statsData, error: statsError } = useSWR(
+    `/api/kubernetes/stats/${widget.namespace}/${widget.app}`);
+
+  if (statsError || statusError) {
+    return <Container error={t("widget.api_error")} />;
+  }
+
+  if (statusData && statusData.status !== "running") {
+    return (
+      <Container>
+        <Block label={t("widget.status")} value={t("docker.offline")} />
+      </Container>
+    );
+  }
+
+  if (!statsData || !statusData) {
+    return (
+      <Container service={service}>
+        <Block label="docker.cpu" />
+        <Block label="docker.mem" />
+        <Block label="docker.rx" />
+        <Block label="docker.tx" />
+      </Container>
+    );
+  }
+
+  const network = statsData.stats?.networks?.eth0 || statsData.stats?.networks?.network;
+  return (
+    <Container service={service}>
+      <Block label="docker.cpu" value={t("common.percent", { value: statsData.stats.cpuUsage })} />
+      <Block label="docker.mem" value={t("common.bytes", { value: statsData.stats.mem })} />
+      {network && (
+        <>
+          <Block label="docker.rx" value={t("common.bytes", { value: network.rx_bytes })} />
+          <Block label="docker.tx" value={t("common.bytes", { value: network.tx_bytes })} />
+        </>
+      )}
+    </Container>
+  );
+}