access to EC2 (for developers) Agenda – introduction – EC2 in native environment – 3-tier architecture intro – alternative methods of resource connection: – Bastion host – SSM – EC2 Instance Connect DDoS attacks A regular virtual machineIt's a VM. Classic EC2 instance in de‐ fault setting. Resources: EC2SecurityGroup: Type: AWS:: EC2:: SecurityGroup Properties: GroupName: Launch-wizard-13 Launch-wizard-13 GroupDescription: Allow traffic to EC2 SecurityGroupIngress: - CidrIp: 0.0.0.0/0 IpProtocol: -1 SecurityGroupEgress: - CidrIp: 0.0.0.0/0

your host. – USB device support. VirtualBox implements a virtual USB controller and allows you to connect arbitrary USB devices to your virtual machines without having to install device-specific drivers screens attached to the host system. – Built-in iSCSI support. This unique feature allows you to connect a virtual machine directly to an iSCSI storage server without going through the host system. The 112 for details. – USB over RDP. Via RDP virtual channel support, VirtualBox also allows you to connect arbitrary USB devices locally to a virtual machine which is running remotely on a VirtualBox RDP

your host. – USB device support. VirtualBox implements a virtual USB controller and allows you to connect arbitrary USB devices to your virtual machines without having to install device-specific drivers screens attached to the host system. – Built-in iSCSI support. This unique feature allows you to connect a virtual machine directly to an iSCSI storage server without going through the host system. The 112 for details. – USB over RDP. Via RDP virtual channel support, VirtualBox also allows you to connect arbitrary USB devices locally to a virtual machine which is running remotely on a VirtualBox RDP

then testing to ensure they operate as expected iv. Great Amazon Reboot of 2014 – 10% of Amazon EC2 servers had to reboot for Xen emergency security patch. At Netflix, zero downtime, no one actively

已 经 存 在 2003年Docker兴起，但云原生架构依然 没有出现，Docker公司还差点死了 1 9 9 6 年 戴 尔 提 出 云 计 算 理 念 2006年亚马逊率先推出 了弹性计算云（EC2） 分水岭 云原生 Docker： 抽象云资源，使 得更容易使用 微服务： 加快业务迭代更新 从支持应用不同维度发展，最终走在了一起 2010年WSO2提出 类云原生的概念 云原生应用相比传统应用的优势

first-generation Trainium…[and offers] 30-40% better price performance than the current generation of GPU-based EC2 P5e and P5en instances. - Amazon AWS Trainium Overview, Accessed 5/25 Estimated Annual Sales, $B

load templates from a non-filesystem location, subclass tornado.template.BaseLoader and pass an instance as the template_loader application setting. Compiled templates are cached by default; to turn off child process will have its own IOLoop, so it is important that nothing touches the global IOLoop instance (even indirectly) before the fork. Second, it is difficult to do zero-downtime updates in this model more information). When we receive requests, we iterate over the list in order and instantiate an instance of the first request class whose regexp matches the request path. The request class can be specified

load templates from a non-filesystem location, subclass tornado.template.BaseLoader and pass an instance as the template_loader application setting. Compiled templates are cached by default; to turn off child process will have its own IOLoop, so it is important that nothing touches the global IOLoop instance (even indirectly) before the fork. Second, it is difficult to do zero-downtime updates in this model WebSocketHandler.ping() WebSocketHandler.on_pong() WebSocketClosedError Client-side support websocket_connect() WebSocketClientConnection WebSocketClientConnection.close() WebSocketClientConnection.write_message()

285 7.2.1 Request header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285 7.2.2 Connect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286 7.2.3 Disconnect . . . Once you start this executable (which acts as a HTTP server on a specific TCP/IP port), clients can connect to the web service and thus control a VirtualBox installa- tion. 2. VirtualBox also comes with WSDL anything useful, two objects need to be created, as can be seen in the clienttest constructor: 1. An instance of IWebsessionManager, which is an interface provided by the web service to manage “web sessions”

315 7.2.1 Request header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315 7.2.2 Connect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316 7.2.3 Disconnect . . . Once you start this executable (which acts as a HTTP server on a specific TCP/IP port), clients can connect to the web service and thus control a VirtualBox installa- tion. 2. VirtualBox also comes with WSDL anything useful, two objects need to be created, as can be seen in the clienttest constructor: 1. An instance of IWebsessionManager, which is an interface provided by the web service to manage “web sessions”