Troubleshooting Component & Cluster Health Observing Flows with Hubble Observing flows with Hubble Relay Connectivity Problems Policy Troubleshooting etcd (kvstore) Cluster Mesh Troubleshooting Symptom Library What services are communicating with each other? How frequently? What does the service dependency graph look like? What HTTP calls are being made? What Kafka topics does a service consume from or produce ConfigMap cilium-config to enable Hubble... ♻ Restarted Cilium pods � Generating certificates for Relay... 2021/04/13 17:11:23 [INFO] generate received request 2021/04/13 17:11:23 [INFO] received CSR 2021/04/13

Troubleshooting Component & Cluster Health Observing Flows with Hubble Observing flows with Hubble Relay Connectivity Problems Policy Troubleshooting etcd (kvstore) Cluster Mesh Troubleshooting Symptom Library What services are communicating with each other? How frequently? What does the service dependency graph look like? What HTTP calls are being made? What Kafka topics does a service consume from or produce ConfigMap cilium-config to enable Hubble... ♻ Restarted Cilium pods � Generating certificates for Relay... 2021/04/13 17:11:23 [INFO] generate received request 2021/04/13 17:11:23 [INFO] received CSR 2021/04/13

Troubleshooting Component & Cluster Health Observing Flows with Hubble Observing flows with Hubble Relay Connectivity Problems Policy Troubleshooting etcd (kvstore) Symptom Library Useful Scripts Reporting Compatibility Guarantees API Reference Hubble internals Hubble Architecture Hubble server Hubble Relay Reference Command Cheatsheet Command utilities: Command examples: Kubernetes examples: Command What services are communicating with each other? How frequently? What does the service dependency graph look like? What HTTP calls are being made? What Kafka topics does a service consume from or produce

Troubleshooting Component & Cluster Health Observing Flows with Hubble Observing flows with Hubble Relay Connectivity Problems Policy Troubleshooting etcd (kvstore) Symptom Library Useful Scripts Reporting Compatibility Guarantees API Reference Hubble internals Hubble Architecture Hubble server Hubble Relay Reference Command Cheatsheet Command utilities: Command examples: Kubernetes examples: Command What services are communicating with each other? How frequently? What does the service dependency graph look like? What HTTP calls are being made? What Kafka topics does a service consume from or produce

spring-expression module provides a powerful Expression Language for querying and manipulating an object graph at runtime. It is an extension of the unified expression language (unified EL) as specified in the presence information across cluster of servers (see broker relay config options). Resolve user destinations across cluster of servers (see broker relay config options). StompSubProtocolErrorHandler extension Otherwise, the bean is created only when it is requested. Creation of a bean potentially causes a graph of beans to be created, as the bean’s dependencies and its dependencies' dependencies (and so on)

spring-expression module provides a powerful Expression Language for querying and manipulating an object graph at runtime. It is an extension of the unified expression language (unified EL) as specified in the presence information across cluster of servers (see broker relay config options). Resolve user destinations across cluster of servers (see broker relay config options). StompSubProtocolErrorHandler extension Otherwise, the bean is created only when it is requested. Creation of a bean potentially causes a graph of beans to be created, as the bean’s dependencies and its dependencies' dependencies (and so on)

with maths and automation, we can plot and visualize the change in values over time on a simple 2D graph. What’s more, we can also draw lines and curves that show the computer how we want it to calculate the selected keyframe to a specific value, as well as buttons to help zoom and navigate the main graph view. 2. Settings – While all of the high-traffic controls are presented directly, the right end color and its visibility within the graph view can be toggled by clicking on the eyeball icon. 4. Graph View – Last but not least is the graph view, the big graph of values and times that we use to animate

nohup ./prometheus –config.file=prometheus.yml & 4. 查看流量信息（以流量监控信息为例）： a. http://localhost:9090/graph b. p2p_flow_in c. p2p_flow_out d. rpc_flow_in e. rpc_flow_out 使用 Grafana 查看监控 因为Prometheus的界 侧链/中继链模式是2014年BlockStream提出的一种跨链方案。其与公证人模式 最大的区别在于其验证是在目标链进行，通过双向锚定的方式实现资产在不 同链之间的转移。目标链的验证方式各不相同，比如BTC-Relay使用的是SPV 技术。 异步模式 以太坊上很多预言机类的DApp的实现方式采用的是异步模式。简单来说，是 指发起调用的是一个函数，处理调用结果的是另一个回调函数，如下图所 示： 异步调用场景 如下图是中继机制的整体结构，主要分为以下两个部分： 链上中继合约(XuperRelayer)：部署在原链上的一个智能合约，会保 存目标链的所有块头信息，并提供基于梅克尔证明的目标链交易存在 性验证。 中继同步进程(Relay Process)：在目标链和原链之间，会有一个或多 个中继进程，持续监听目标链的最新出块信息，并抽取出块头信息写 入 以一个典型的资产转移的场景为例，首先在B链上发起tx1交易，然后原链上 发

nohup ./prometheus –config.file=prometheus.yml & 4. 查看流量信息（以流量监控信息为例）： a. http://localhost:9090/graph b. p2p_flow_in c. p2p_flow_out d. rpc_flow_in e. rpc_flow_out 使用 Grafana 查看监控 因为Prometheus的界 侧链/中继链模式是2014年BlockStream提出的一种跨链方案。其与公证人模式 最大的区别在于其验证是在目标链进行，通过双向锚定的方式实现资产在不 同链之间的转移。目标链的验证方式各不相同，比如BTC-Relay使用的是SPV 技术。 异步模式 以太坊上很多预言机类的DApp的实现方式采用的是异步模式。简单来说，是 指发起调用的是一个函数，处理调用结果的是另一个回调函数，如下图所 示： 异步调用场景 如下图是中继机制的整体结构，主要分为以下两个部分： 链上中继合约(XuperRelayer)：部署在原链上的一个智能合约，会保 存目标链的所有块头信息，并提供基于梅克尔证明的目标链交易存在 性验证。 中继同步进程(Relay Process)：在目标链和原链之间，会有一个或多 个中继进程，持续监听目标链的最新出块信息，并抽取出块头信息写 入 以一个典型的资产转移的场景为例，首先在B链上发起tx1交易，然后原链上 发

nohup ./prometheus –config.file=prometheus.yml & 4. 查看流量信息（以流量监控信息为例）： a. http://localhost:9090/graph b. p2p_flow_in c. p2p_flow_out d. rpc_flow_in e. rpc_flow_out 使用 Grafana 查看监控 因为Prometheus的界 侧链/中继链模式是2014年BlockStream提出的一种跨链方案。其与公证人模式 最大的区别在于其验证是在目标链进行，通过双向锚定的方式实现资产在不 同链之间的转移。目标链的验证方式各不相同，比如BTC-Relay使用的是SPV 技术。 异步模式 以太坊上很多预言机类的DApp的实现方式采用的是异步模式。简单来说，是 指发起调用的是一个函数，处理调用结果的是另一个回调函数，如下图所 示： 异步调用场景 如下图是中继机制的整体结构，主要分为以下两个部分： 链上中继合约(XuperRelayer)：部署在原链上的一个智能合约，会保 存目标链的所有块头信息，并提供基于梅克尔证明的目标链交易存在 性验证。 中继同步进程(Relay Process)：在目标链和原链之间，会有一个或多 个中继进程，持续监听目标链的最新出块信息，并抽取出块头信息写 入 以一个典型的资产转移的场景为例，首先在B链上发起tx1交易，然后原链上 发