DevOps Flashcards by Christie Liu

Jenkins

Builds and tests code

Plugins for integration with version control systems and support for different languages

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Cloud Operations Suite (includes) (6)

Cloud Monitoring  (GCP and AWS)
Cloud Logging
Error Reporting
Cloud Debugger
Cloud Trace
Cloud Profiler

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SDLC 7 steps

Analysis
Design
Development
Testing
Deployment
Documentation
Maintenance

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Puppet and Chef

Configure software on servers

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Cloud Build

Build, test, deploy software
Create - image containers stored in Artifact Registry
Deploy - services to VMs, K8 clusters, serverless, Firebase
Scan - images for known vulnerabilities
Binary Authorization - verify trusted containers run

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Chaos Engineering

Introducing random failures to system to understand consequences and identify unanticipated failure modes

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4 components of business continuity plan

Disaster plan
Business Impact Analysis
Recovery plan
RTO

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HTTP error:

400

Bad request - server can’t understand request due to invalid syntax

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HTTP error:

401

Request not authenticated

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HTTP error:

403

Permission denied

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HTTP error:

404

Resource not found; invalid endpoint

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HTTP error:

500

Internal server error

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HTTP Error:

501

Method not implemented by the API

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HTTP Error:

503

Server unavailable

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HTTP Error:

429

Too many requests

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RPC APIs

APIs oriented around functions implemented using sockets

Designed for high efficiency

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API Keys

Authenticates users of API functions

String of alphanumeric characters that identify an app or device to a service

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Fuzzing

Testing framework - subject program to semi-random inputs for extended period of time

Used to find bugs and security vulnerabilities that may only show up at runtime

Uses tools called fuzzers

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CLI tools included with GCP SDK install

gcloud
gsutil
bq

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Bigtable CLI

cbt

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Pub/Sub Emulator CLI

pubsub emulator

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Where Cloud Logging can export logs (2)

How long logs retained

Cloud Storage
BQ
30 days

Prometheus

Monitoring tool that collects metrics data from targets by scrapping HTTP endpoints of target services

Continuous Delivery

Releasing code soon after code passes tests

Continuous Delivery - deployment strategies (4)

Complete deployment - monolith Rolling deployment Canary deployment Blue/Green deployment

Continuous Integration

Incorporating new code into established code base soon after written Continuously integrate new code into production using automated tools

RPC APIs

APIs oriented around functions implemented using sockets for high efficiency

Data driven testing

Uses structured data sets for testing For each condition defined or set of inputs, tests function for expected output values Good for testing APIs or functions from command line

Modularity Driven Testing

Small scripts to test limited functionality | Combined to test higher level abstractions

Keyword Driven Testing

Tests sequence of steps to execute Good for manual testing and UI

Model based testing

Simulation program used to generate test data Uses several methods to simulate system being tested

Test driven development

Requirements mapped to tests Once code is tested, integrated into baseline of code

JUnit

Unit test tool for code written in Java

Fuzzing

Automated testing tool that subjects a program to semi-random inputs for extended period to find bugs and security vulnerabilities that may only turn up at runtime

gsutil CLI utility

Recommended method for moving data from on prem | Supports parallel loading of chunks

Continuous Delivery deployment strategies (4)

Complete Rolling Canary Blue/Green

Continuous Integration - automation tools (3)

Version control / repo Test Build

Circuit Breaker pattern

Use object to monitor results of a function or service call If number of errors surpasses threshold, service stops making requests Slowly increase requests while monitoring errors

Artifact Registry

Next gen Container Registry Store, manage packages and Docker container images Integrates with Cloud Build and other GCP CI/CD tools

Cloud Build

CI/CD service that continuously takes source code, builds, tests, and deploys Turns source code into build artifacts

Cloud Source Repository

Hosted, private Git repo for version control and collaboration

Cloud Deploy

Creates delivery pipeline for apps via "releases" which define target environments and sequence to deploy to targets

Port 3306

MySQL

Port 22

SSH

Port 7

ICMP ping

Port 3389

RDP

Port 25

SMTP

Port 443

HTTPS

Port 21

FTP

HTTP 429

Too many requests

HTTP 301

URL of resource changed | New URL given in response

HTTP 408

Request time out

Cloud Tasks

Creates tasks outside of main app workflow to be processed async Scheduling, rate controls, deduplication