def METHOD_NAME(self):
    # Start day2 nodes installation
    log.info(f"Start installing all known nodes in the cluster {self.id}")
    hosts = self.api_client.get_cluster_hosts(self.id)
    for host in hosts:
        if host["status"] == "known":
            self.api_client.install_day2_host(self._infra_env_config.infra_env_id, host["id"])
    log.info(
        f"Waiting until all nodes of cluster {self.id} have been installed (reached " "added-to-existing-cluster)",
    )
    wait_till_all_hosts_are_in_status(
        client=self.api_client,
        cluster_id=self.id,
        nodes_count=self._config.day2_workers_count + self._config.day2_masters_count,
        statuses=[consts.NodesStatus.DAY2_INSTALLED],
        interval=30,
    )