public void close() {
        this.closed = true;
        closeables.forEach(c -> {
            try {
                c.close();
            } catch (Exception e) {
                log.warn("Failed to close the cilium node", e);
            }
        });
    }
CiliumNode represents a node in the Cilium cluster.
Usually it's aware by the Cilium Peer Service.
oap-server/server-fetcher-plugin/cilium-fetcher-plugin/src/main/java/org/apache/skywalking/oap/server/fetcher/cilium/nodes/CiliumNode.java