jahe

# Create a serverless project for Node.js within AWS Lambda
serverless create --template aws-nodejs

# Create AWS credentials file in ~/.aws
serverless config credentials --provider aws --key <access-key-id> --secret <secret> --profile <profilename>

# Deploy functions from serverless.yml to AWS Lambda
sls deploy

# Invoke function

jahe

Glossar

• Sidecar - Process that encapsulates required technologies (e.g. logging, monitoring, service discovery, etc.) in the microservices environment and makes them available to microservices that are not able to use those technologies natively
• Immutable Server -

Configuration + Coordination

• Zookeeper - https://zookeeper.apache.org/ - Provides configs in a hierarchical key-value store that is replicated and synchronized across large distributed systems.
• etcd - https://github.com/coreos/etcd - Like Zookeeper. Distributed reliable key-value store for the most critical data of a distributed system. Provides a REST API. It is possible to do locking in a distributed system with it.
• Spring Cloud Config - Provides a REST API. Config files can be based in a Git repo. The config data can be encrypted (e.g. for passwords in config files)

Service Discovery

jahe

User Space vs. Kernel Space

• User Space = User + Prozesse + Libraries
• Kernel Space = Kernel + Driver + Hardware
• API through System Calls and Signals provided by glibc (C Library)

System Call vs. Signal

• System Call = API call from a program to the kernel
• Signal = An Event like SIGTERM or SIGKILL that interrupts the programs control flow

Static linked vs. Dynamically linked

jahe

DockerEE Basic - 80 Euro pro Maschine

Storage Driver

• Debian (Default): AUFS
• CentOS (Default): Device Mapper

Docker Datacenter

• Build Pipeline
• Zugriffskontrolle

jahe

Innerhalb von Docker ist man root --> Hat aber nur noch 4-5 Rechte --> Capabilites

• 47 Capabilities sind dabei deaktiviert

Limitierung

• Capabilties - Limitierung von Kernel Zugriffen
• CGroups - Limitierung von Ressourcen
• ACL - Limitierung von Dateizugriffen

Dockercontainer so isolieren, dass sich diese nicht sehen können

jahe

Hierarchy

• backgrounds - A GameObject without a Sprite. It has a Script BackgroundParallax that gets env_bg, env_BigBen, etc. as a list of parallaxable GameObjects.
  • Clouds
  • env_Bank
  • env_BigBen
  • Fog
  • RiverMid
  • RiverTop
• foregrounds - A GameObject that has only a Transform Component
• Transform

jahe

// Ignore a single test within a Specification
class MySpec extends Specification {
  @Ignore // spock.lang.Ignore
  def "foo"() {
    // ...
  }
}

// Ignore a whole Specification
@Ignore // spock.lang.Ignore

jahe

Glossar

A/B Testing - Two groups of users (A and B) interact with different versions of the app (e.g. Design is different). The version with a better conversion rate wins.

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Monday

09:30 - 17:00 (Salon 4) - Web Hacking: Pentesting and attacking Web Apps

http://christian-schneider.net/downloads/Toolbased_WebPentesting.pdf FindBugs + FindSecurityBugs - Plugins in Eclipse

CVE

CVE-ID - One vulnerabilty in a CVE registry. It includes a score

jahe

Components:

1. User
2. Two Hardware Components
   • The Alexa enabled Device (e.g. Amazon Echo)
   • The Mobile Phone or Tablet that has the Alexa App on it
3. Alexa Platform
   • It contains the entire universe of thousands of skills
   • It contains all the artificial intelligence to enable this platform
   • This is where we are putting our Skill details through the Developer Portal
4. API for this Skill

jahe

// ------- C# -------
// Generator functions
//
// Has to be a return value of IEnumerable, IEnumerable<T>, IEnumerator or IEnumerator<T>
// in C# a Generator function is inferred by looking at the function body (looking for yield statements)
// IEnumerable is an item that can be iterated on
public IEnumerable<int> GetValues(int count) {
  for (int i = 0; i < count; ++i) {
    yield return i;
  }