in mesh traffic ● Summary #IstioCon Istio Architecture Connect, secure, control, and observe services. #IstioCon Security Architecture #IstioCon Bookinfo architecture without service mesh ● Reviews-v1 calls ratings, black stars ● Reviews-v3 ○ calls ratings, red stars Initializing services 1) Deploy bookinfo services with istio sidecar without reviews-v2 2) Deploy bookinfo gateway 3) Deploy reviews-v2 kubectl label namespace default istio-injection=disabled/enabled ） Initializing services 1) Deploy bookinfo services with istio sidecar without reviews-v2 2) Deploy bookinfo gateway 3) Deploy reviews-v2

Multi Deployments • Docker Compose • BOSH/Pivotal Tile • Helm Chart Label • Label in project and system scopes • Mark labels to image and chart Harbor Architecture API Routing API Routing Core Users (GUI/API) Container Schedulers/Runtimes Consumers LDAP/Active Directory Supporting services Harbor Packaging Docker Kubernetes Cloud Foundry Deep dive Harbor through panel discussion

apply K8S API Спецификация ClickHouse on Kubernetes – components Shard 1 Replica 1 Zookeeper Services Zookeeper-0 Zookeeper-2 Zookeeper-1 Replica Service Load Balancer Service Shard 1 Replica процесс может занять некоторое время (не мгновенно). Схема отношений Kubernetes Pods, Volumes, Services Replication – нужен Zookeeper Можно использовать любой имеющийся ZK cluster Install Zookeeper:

compose, yaml configure file ➔ One command to boot up and deploy ➔ 5 fixed EightFish services + 1 your customized app services How to Test and Deploy subnode subxt proxy http gate postgres redis app

data plane • Poor in scheduling algorithm • Iptables rules are difficult to debug IPVS mode • Services are organized in hash table • IPVS DNAT • conntrack/iptables SNAT • Pros • O(1) time complexity

© 2018 Percona. 38 Need Help ? Percona - MySQL, MariaDB, MongoDB, PostgreSQL Support and Services Will help you getting your MySQL log to Clickhouse Recommend Altinity for complete ClickHouse

Dates  Time Zones20 Clocks  Several clocks available in :  std::system_clock: wall clock time from system-wide real-time clock  std::steady_clock: guarantees it never goes backwards current time as a time_point. system_clock::time_point tpoint { system_clock::now() }; // Or: auto tpoint { system_clock::now() }; // Convert to a time_t. time_t tt { system_clock::to_time_t(tpoint) }; // aliases: template using sys_time = std::chrono::time_pointsystem_clock, Duration>; // Representation of number of seconds since epoch. using sys_seconds = sys_t

leap_seconds (https://youtu.be/WX3OmVu4lAs) • time_zone and time_zone_link (https://youtu.be/MODhhr7m-5s) • system_clock::now(), file_clock, leap second awareness (https://youtu.be/c7DT28TV0AY)9 Part II: Calendrical requirements.20 C++20’s chrono adds several new clocks ([time.clock]) Existing clocks (pre-C++20) • system_clock • (file_clock) New clocks (in C++20) • utc_clock • tai_clock • gps_clock • (file_clock)21 (file_clock)21 C++20’s chrono adds several new clocks ([time.clock]) Existing clocks (pre-C++20) • system_clock • (file_clock) New clocks (in C++20) • utc_clock • tai_clock • gps_clock • (file_clock)22 Why

said it?Frederick Brooks Jr. • Joined IBM in 1956 • Manager for the development of the IBM System/360 family of computers and the OS/360 software package • In 1975, published The Mythical Man-Month: designersRequirements refinement and rapid prototyping • The hardest single part of building a software system is deciding precisely what to build • The most important function that software builders do for present-day software acquisition procedures rests upon the assumption that one can specify a satisfactory system in advance, get bids for its construction, have it built, and install it • This assumption is fundamentally

and when work should happen … including some standard ones: an event loop, portable access to the system execution context, nursery for spawned work4 P2300: STD::EXECUTION Proposes: • A set of concepts ☹ the greatest keyboard ever made….82 The mission: Write a program that monitors the entire system for keyboard events and plays Model M clicky sounds.83 MODEL M SIMULATOR: STRATEGY 1. Model Profit!84 Step 1: Model key click as a sender85 MODEL KEYCLICK AS SENDER: STRATEGY 1. Assume system API for registering keyboard callback 2. Write a keyboard sender and op state such that: •