more pods will be pro-actively added - We can also get the number of messages vs the target per pod - After the queue is empty and the specified cooldown period (a property of the ​ScaledObject​ Metrics adapter, Scaler, Controller. RocketMQ operator deployment on Kubernetes also support Horizontal scale with Name server cluster scale, Broker Cluster Scale RocketMQ has Client SDK for Go, Java for event driven trigger from RocketMQ, implement - Get metrics spec for scaling for horizontal pod autoscaler - write test Key modules implementation architecture design Core component

of a larger cluster on which you can run your applications. Pod A co-located group of containers and their storage is called a pod. For example, it makes sense to have database processes and data data containers as close as possible - ideally they should be in same pod. Label Labels are names given to resources to classify them, and are always a key pair of name and value. The key-value pairs actions. Replication Controller Replication Controllers (RC) are an abstraction used to manage pod lifecycles. One of key uses of replication controllers is to maintain a certain number of pods. This

Facilitate our PaaS and micro-service product Kubernetes Capabilities/Advantages to Build DevOps Solution Pod Job CronJob • k8s itself is NOT a PaaS or DevOps platform，but … • k8s resources that can be used Affinity • And more … Kubernetes Capabilities/Advantages to Build DevOps Solution [] InitContainers Pod Spec [] Containers Affinity / SchedulerName [] Volumes Initialize the build environment Configure Capabilities/Advantages to Build DevOps Solution parallelism Job Spec activeDeadlineSeconds completions Pod Template Expected maximum number of parallel build tasks Expected number of completed build tasks

and status monitoring. 6 Table 2: CN2 Components Pod Name Where Description Configuration Plane1 contrail-k8s-apiserver Control Plane Node This pod is an aggregated API server that is the entry point er for handling. There is one contrail-k8s-apiserver pod per Kubernetes control plane node. contrail-k8s-controller Control Plane Node This pod performs the Kubernetes control loop function to reconcile intended state. There is one contrail-k8s-controller pod per Kubernetes control plane node. contrail-k8s- kubemanager Control Plane Node This pod is the interface between Kubernetes resources and Contrail

OPERATOR 条件 4.8. 允许非集群管理员安装 OPERATOR 4.9. 管理自定义目录 4.10. 在受限网络中使用 OPERATOR LIFECYCLE MANAGER 4.11. 目录源 POD 调度 4.12. 管理平台 OPERATOR （技术预览） 4.13. TROUBLESHOOTING OPERATOR 的问题 第 第 5 章 章 开 开发 发 OPERATOR 5.1. 关于 OPERATOR 5.5. 基于 HELM 的 OPERATOR 5.6. 基于 JAVA 的 OPERATOR 5.7. 定义集群服务版本（CSV） 5.8. 使用捆绑包镜像 5.9. 遵守 POD 安全准入 5.10. 云供应商上的 OPERATOR 的令牌身份验证 5.11. 使用 SCORECARD 工具验证 OPERATOR 5.12. 验证 OPERATOR 捆绑包 5.13. 6.2. 裸机事件中继 6.3. CLOUD CREDENTIAL OPERATOR 6.4. CLUSTER AUTHENTICATION OPERATOR 6.5. CLUSTER AUTOSCALER OPERATOR 6.6. CLUSTER CLOUD CONTROLLER MANAGER OPERATOR 6.7. CLUSTER CAPI OPERATOR 6.8. CLUSTER

functionality requires a private IP to be provided when registering the custom nodes. When setting the default_pod_security_policy_template_id: to restricted Rancher creates RoleBindings and ClusterRoleBindings on specific service account is assigned to the pod. Where access to the Kubernetes API from a pod is required, a specific service account should be created for that pod, and rights granted to that service account 9-rancher1-1" enable_network_policy: true default_pod_security_policy_template_id: "restricted" services: etcd: uid: 52034 gid: 52034 kube-api: pod_security_policy: true secrets_encryption_config:

specific service account is assigned to the pod. Where access to the Kubernetes API from a pod is required, a specific service account should be created for that pod, and rights granted to that service account 9-rancher1-1" enable_network_policy: true default_pod_security_policy_template_id: "restricted" services: etcd: uid: 52034 gid: 52034 kube-api: pod_security_policy: true secrets_encryption_config: decar: "" kubedns: "" dnsmasq: "" kubedns_sidecar: "" kubedns_autoscaler: "" coredns: "" coredns_autoscaler: "" kubernetes: "" flannel: "" flannel_cni: "" calico_node: ""

transparently insert security visibility + enforcement, but does so in a way that is based on service / pod / container identity (in contrast to IP address identification in traditional systems) and can filter Restarted unmanaged pod kube-system/event-exporter-gke-564fb97f9- rv8hg ♻ Restarted unmanaged pod kube-system/kube-dns-6465f78586-hlcrz ♻ Restarted unmanaged pod kube-system/kube-dns-autoscaler- 7f89fb6b79-fsmsg Restarted unmanaged pod kube-system/l7-default-backend-7fd66b8b88- qqhh5 ♻ Restarted unmanaged pod kube-system/metrics-server-v0.3.6- 7b5cdbcbb8-kjl65 ♻ Restarted unmanaged pod kube-system/stackdr

Istio Pod App container Sidecar container All incoming traffic must flow through the sidecar first when entering the pod All outgoing traffic must flow through the sidecar before leaving the pod 12 not ready? Stabilizing Istio Pod App container Sidecar container (not running) The incoming traffic is sank into the void The outgoing traffic cannot leave the pod 13 What happens when the sidecar During pod creation ○ During pod deletion ● To prevent it, we need to make sure that: 1. Envoy is started before any other container in a pod 2. Envoy is stopped after any other container in a pod 14

transparently insert security visibility + enforcement, but does so in a way that is based on service / pod / container identity (in contrast to IP address identification in traditional systems) and can filter paths include with and without service load- balancing and various network policy combinations. The pod name indicates the connectivity variant and the readiness and liveness gate indicates success or failure 65s pod-to-a-79546bc469-rl2qq 1/1 Running 0 66s pod-to-a-allowed-cnp-58b7f7fb8f-lkq7p 1/1 Running 0 66s pod-to-a-de