Distro 算法是集 Gossip 以及 Eureka 协议的优点并加以优化而出 来的，对于原生的 Gossip，由于随机选取发送消息的节点，也就不可避免的存在消息重复发送给同 ⼀节点的情况，增加了网络的传输的压力，也给消息节点带来额外的处理负载，而 Distro 算法引入 了权威 Server 的概念，每个节点负责⼀部分数据以及将自己的数据同步给其他节点，有效的降低 了消息冗余的问题。 早期的 的每台机器上都维护了当前的所有注册上来的非持久化实例数 据。 数据校验 在 Distro 集群启动之后，各台机器之间会定期的发送心跳。心跳信息主要为各个机器上的所有数据 的元信息（之所以使用元信息，是因为需要保证网络中数据传输的量级维持在⼀个较低水平）。这 种数据校验会以心跳的形式进行，即每台机器在固定时间间隔会向其他机器发起⼀次数据校验请求。 ⼀旦在数据校验过程中，某台机器发现其他机器上的数据与本地数据不⼀致，则会发起⼀次全量拉 ro 机器会直接从本地拉取数据。 快速响应。 41 > Nacos 架构 这种机制保证了 Distro 协议可以作为⼀种 AP 协议，对于读操作都进行及时的响应。在网络分区 的情况下，对于所有的读操作也能够正常返回；当网络恢复时，各个 Distro 节点会把各数据分片的 数据进行合并恢复。 小结 Distro 协议是 Nacos 对于临时实例数据开发的⼀致性协议。其数据存储在缓存中，并且会在启动

Dynatrace operator is running, enrich metrics with additional metadata (e.g. about the host, process or pod). • Default dimensions: specify key-value pairs that are added to all exported metrics. If tags with traffic can be routed to a pod that has also begun its shutdown processing. You can configure a sleep execution in a preStop handler to avoid requests being routed to a pod that has already begun shutting requests to stop being routed to the pod and its duration will vary from deployment to deployment. The preStop handler can be configured via the PodSpec in the pod’s configuration file as follows: spec:

is running, enrich 351 metrics with additional metadata (for example, about the host, process, or pod). • Default dimensions: Specify key-value pairs that are added to all exported metrics. If tags with traffic can be routed to a pod that has also begun its shutdown processing. You can configure a sleep execution in a preStop handler to avoid requests being routed to a pod that has already begun shutting requests to stop being routed to the pod and its duration will vary from deployment to deployment. The preStop handler can be configured by using the PodSpec in the pod’s configuration file as follows:

is running, enrich 346 metrics with additional metadata (for example, about the host, process, or pod). • Default dimensions: Specify key-value pairs that are added to all exported metrics. If tags with traffic can be routed to a pod that has also begun its shutdown processing. You can configure a sleep execution in a preStop handler to avoid requests being routed to a pod that has already begun shutting requests to stop being routed to the pod and its duration will vary from deployment to deployment. The preStop handler can be configured by using the PodSpec in the pod’s configuration file as follows:

is running, enrich 350 metrics with additional metadata (for example, about the host, process, or pod). • Default dimensions: Specify key-value pairs that are added to all exported metrics. If tags with traffic can be routed to a pod that has also begun its shutdown processing. You can configure a sleep execution in a preStop handler to avoid requests being routed to a pod that has already begun shutting requests to stop being routed to the pod and its duration will vary from deployment to deployment. The preStop handler can be configured by using the PodSpec in the pod’s configuration file as follows:

operator is running, enrich metrics with additional metadata (for example, about the host, process, or pod). • Default dimensions: Specify key-value pairs that are added to all exported metrics. If tags with traffic can be routed to a pod that has also begun its shutdown processing. You can configure a sleep execution in a preStop handler to avoid requests being routed to a pod that has already begun shutting requests to stop being routed to the pod and its duration will vary from deployment to deployment. The preStop handler can be configured by using the PodSpec in the pod’s configuration file as follows:

operator is running, enrich metrics with additional metadata (for example, about the host, process, or pod). • Default dimensions: Specify key-value pairs that are added to all exported metrics. If tags with traffic can be routed to a pod that has also begun its shutdown processing. You can configure a sleep execution in a preStop handler to avoid requests being routed to a pod that has already begun shutting requests to stop being routed to the pod and its duration will vary from deployment to deployment. The preStop handler can be configured by using the PodSpec in the pod’s configuration file as follows:

operator is running, enrich metrics with additional metadata (for example, about the host, process, or pod). • Default dimensions: Specify key-value pairs that are added to all exported metrics. If tags with traffic can be routed to a pod that has also begun its shutdown processing. You can configure a sleep execution in a preStop handler to avoid requests being routed to a pod that has already begun shutting requests to stop being routed to the pod and its duration will vary from deployment to deployment. The preStop handler can be configured by using the PodSpec in the pod’s configuration file as follows:

operator is running, enrich metrics with additional metadata (for example, about the host, process, or pod). • Default dimensions: Specify key-value pairs that are added to all exported metrics. If tags with traffic can be routed to a pod that has also begun its shutdown processing. You can configure a sleep execution in a preStop handler to avoid requests being routed to a pod that has already begun shutting requests to stop being routed to the pod and its duration will vary from deployment to deployment. The preStop handler can be configured by using the PodSpec in the pod’s configuration file as follows:

traffic can be routed to a pod that has also begun its shutdown processing. You can configure a sleep execution in a preStop handler to avoid requests being routed to a pod that has already begun shutting requests to stop being routed to the pod and its duration will vary from deployment to deployment. The preStop handler can be configured via the PodSpec in the pod’s configuration file as follows: spec: any remaining in-flight requests to complete. NOTE When Kubernetes sends a SIGTERM signal to the pod, it waits for a specified time called the termination grace period (the default for which is 30 seconds)