Airflow is a workflow management system for authoring, scheduling and monitoring workflows or directed acyclic graphs (DAGs) of tasks. It has features like DAGs to define tasks and their relationships, operators to describe tasks, sensors to monitor external systems, hooks to connect to external APIs and databases, and a user interface for visualizing pipelines and monitoring runs. Airflow uses a variety of executors like SequentialExecutor, CeleryExecutor and MesosExecutor to run tasks on schedulers like Celery or Kubernetes. It provides security features like authentication, authorization and impersonation to manage access.
In the session, we discussed the End-to-end working of Apache Airflow that mainly focused on "Why What and How" factors. It includes the DAG creation/implementation, Architecture, pros & cons. It also includes how the DAG is created for scheduling the Job and what all steps are required to create the DAG using python script & finally with the working demo.
Introduction to Apache Airflow, it's main concepts and features and an example of a DAG. Afterwards some lessons and best practices learned by from the 3 years I have been using Airflow to power workflows in production.
In the session, we discussed the End-to-end working of Apache Airflow that mainly focused on "Why What and How" factors. It includes the DAG creation/implementation, Architecture, pros & cons. It also includes how the DAG is created for scheduling the Job and what all steps are required to create the DAG using python script & finally with the working demo.
Introduction to Apache Airflow, it's main concepts and features and an example of a DAG. Afterwards some lessons and best practices learned by from the 3 years I have been using Airflow to power workflows in production.
Presentation given at Coolblue B.V. demonstrating Apache Airflow (incubating), what we learned from the underlying design principles and how an implementation of these principles reduce the amount of ETL effort. Why choose Airflow? Because it makes your engineering life easier, more people can contribute to how data flows through the organization, so that you can spend more time applying your brain to more difficult problems like Machine Learning, Deep Learning and higher level analysis.
Orchestrating workflows Apache Airflow on GCP & AWSDerrick Qin
Working in a cloud or on-premises environment, we all somehow move data from A to B on-demand or on schedule. It is essential to have a tool that can automate recurring workflows. This can be anything from an ETL(Extract, Transform, and Load) job for a regular analytics report all the way to automatically re-training a machine learning model.
In this talk, we will introduce Apache Airflow and how it can help orchestrate your workflows. We will cover key concepts, features, and use cases of Apache Airflow, as well as how you can enjoy Apache Airflow on GCP and AWS by demo-ing a few practical workflows.
In the session, we discussed the End-to-end working of Apache Airflow that mainly focused on "Why What and How" factors. It includes the DAG creation/implementation, Architecture, pros & cons. It also includes how the DAG is created for scheduling the Job and what all steps are required to create the DAG using python script & finally with the working demo.
Slide deck for the fourth data engineering lunch, presented by guest speaker Will Angel. It covered the topic of using Airflow for data engineering. Airflow is a scheduling tool for managing data pipelines.
We will introduce Airflow, an Apache Project for scheduling and workflow orchestration. We will discuss use cases, applicability and how best to use Airflow, mainly in the context of building data engineering pipelines. We have been running Airflow in production for about 2 years, we will also go over some learnings, best practices and some tools we have built around it.
Speakers: Robert Sanders, Shekhar Vemuri
A 20 minute talk about how WePay runs airflow. Discusses usage and operations. Also covers running Airflow in Google cloud.
Video of the talk is available here:
https://wepayinc.box.com/s/hf1chwmthuet29ux2a83f5quc8o5q18k
Building a Data Pipeline using Apache Airflow (on AWS / GCP)Yohei Onishi
This is the slide I presented at PyCon SG 2019. I talked about overview of Airflow and how we can use Airflow and the other data engineering services on AWS and GCP to build data pipelines.
Presentation given at Coolblue B.V. demonstrating Apache Airflow (incubating), what we learned from the underlying design principles and how an implementation of these principles reduce the amount of ETL effort. Why choose Airflow? Because it makes your engineering life easier, more people can contribute to how data flows through the organization, so that you can spend more time applying your brain to more difficult problems like Machine Learning, Deep Learning and higher level analysis.
Orchestrating workflows Apache Airflow on GCP & AWSDerrick Qin
Working in a cloud or on-premises environment, we all somehow move data from A to B on-demand or on schedule. It is essential to have a tool that can automate recurring workflows. This can be anything from an ETL(Extract, Transform, and Load) job for a regular analytics report all the way to automatically re-training a machine learning model.
In this talk, we will introduce Apache Airflow and how it can help orchestrate your workflows. We will cover key concepts, features, and use cases of Apache Airflow, as well as how you can enjoy Apache Airflow on GCP and AWS by demo-ing a few practical workflows.
In the session, we discussed the End-to-end working of Apache Airflow that mainly focused on "Why What and How" factors. It includes the DAG creation/implementation, Architecture, pros & cons. It also includes how the DAG is created for scheduling the Job and what all steps are required to create the DAG using python script & finally with the working demo.
Slide deck for the fourth data engineering lunch, presented by guest speaker Will Angel. It covered the topic of using Airflow for data engineering. Airflow is a scheduling tool for managing data pipelines.
We will introduce Airflow, an Apache Project for scheduling and workflow orchestration. We will discuss use cases, applicability and how best to use Airflow, mainly in the context of building data engineering pipelines. We have been running Airflow in production for about 2 years, we will also go over some learnings, best practices and some tools we have built around it.
Speakers: Robert Sanders, Shekhar Vemuri
A 20 minute talk about how WePay runs airflow. Discusses usage and operations. Also covers running Airflow in Google cloud.
Video of the talk is available here:
https://wepayinc.box.com/s/hf1chwmthuet29ux2a83f5quc8o5q18k
Building a Data Pipeline using Apache Airflow (on AWS / GCP)Yohei Onishi
This is the slide I presented at PyCon SG 2019. I talked about overview of Airflow and how we can use Airflow and the other data engineering services on AWS and GCP to build data pipelines.
Running Airflow Workflows as ETL Processes on Hadoopclairvoyantllc
While working with Hadoop, you'll eventually encounter the need to schedule and run workflows to perform various operations like ingesting data or performing ETL. There are a number of tools available to assist you with this type of requirement and one such tool that we at Clairvoyant have been looking to use is Apache Airflow. Apache Airflow is an Apache Incubator project that allows you to programmatically create workflows through a python script. This provides a flexible and effective way to design your workflows with little code and setup. In this talk, we will discuss Apache Airflow and how we at Clairvoyant have utilized it for ETL pipelines on Hadoop.
Apache Druid Auto Scale-out/in for Streaming Data Ingestion on KubernetesDataWorks Summit
The importance of ingestion and processing streaming data in telecommunication industry is ever increasing. We, SK Telecom which is Korea's number-one telecommunications provider, encounter how to use infra resources more efficiently. Apache Druid supports auto scaling feature for data ingestion, but it is only available on AWS EC2. We cannot rely on the feature on our private cloud.
In this talk, we are going to introduce auto scale-out/in on Kubernetes. This approach is more outstanding than Druid's scaling implementation. Here are the benefits. The first is our approach can be used anywhere on private cloud or (managed) Kubernetes in Azure, AWS and GKE. The second is AWS EC2's startup and termination requires a few minutes, but our approach requires a few seconds. The last is the scaling mechanism is decoupled from Druid's source code. We will also share development of Druid Helm chart, rolling update, custom metric usage for horizontal auto scaling.
The below is about detailed benefit compared with Druid's auto scaling approach:
1. Druid's auto scaling is only available in AWS, but our approach does not have the obstacle. It can be used in Private cloud(on-premise) are (managed) Kubernetes in Azure, AWS and GKE.
2. AWS EC2 is an instance of virtual machine, so the startup is slower than docker container. A few minutes are required for startup or termination of EC2. Docker container is very lightweight, so it requires a few seconds.
3. Druid's auto scaling is tightly coupled with AWS API because Druid engine code uses AWS API. Our scale-out/in algorithm is conceptually equal to Druid's auto scaling approach, but we decoupled the dependency because Kubernetes communicate with one of dispatcher nodes(i.e. Overlord node) using REST API.
CI/CD with Kubernetes from development to production at GoEuro, a Europe-wide web scale travel search and booking engine startup. Presented at KubeCon + CloudNativeCon 2017 Europe. Link: https://goo.gl/HTSUuu
Container orchestration from theory to practiceDocker, Inc.
"Join Laura Frank and Stephen Day as they explain and examine technical concepts behind container orchestration systems, like distributed consensus, object models, and node topology. These concepts build the foundation of every modern orchestration system, and each technical explanation will be illustrated using SwarmKit and Kubernetes as a real-world example. Gain a deeper understanding of how orchestration systems work in practice and walk away with more insights into your production applications."
Capacity planning is a difficult challenge faced by most companies. If you have too few machines, you will not have enough compute resources available to deal with heavy loads. On the other hand, if you have too many machines, you are wasting money. This is why companies have started investing in automatically scaling services and infrastructure to minimize the amount of wasted money and resources.
In this talk, Nathan will describe how Yelp is using PaaSTA, a PaaS built on top of open source tools including Docker, Mesos, Marathon, and Chronos, to automatically and gracefully scale services and the underlying cluster. He will go into detail about how this functionality was implemented and the design designs that were made while architecting the system. He will also provide a brief comparison of how this approach differs from existing solutions.
Sebastien Thomas, System Architect at Coyote Amerique, gave a presentation on operator frameworks. His talk covered how Operator SDK can be used to create Kubernetes Operators with Go.
1.Wireless Communication System_Wireless communication is a broad term that i...JeyaPerumal1
Wireless communication involves the transmission of information over a distance without the help of wires, cables or any other forms of electrical conductors.
Wireless communication is a broad term that incorporates all procedures and forms of connecting and communicating between two or more devices using a wireless signal through wireless communication technologies and devices.
Features of Wireless Communication
The evolution of wireless technology has brought many advancements with its effective features.
The transmitted distance can be anywhere between a few meters (for example, a television's remote control) and thousands of kilometers (for example, radio communication).
Wireless communication can be used for cellular telephony, wireless access to the internet, wireless home networking, and so on.
Multi-cluster Kubernetes Networking- Patterns, Projects and GuidelinesSanjeev Rampal
Talk presented at Kubernetes Community Day, New York, May 2024.
Technical summary of Multi-Cluster Kubernetes Networking architectures with focus on 4 key topics.
1) Key patterns for Multi-cluster architectures
2) Architectural comparison of several OSS/ CNCF projects to address these patterns
3) Evolution trends for the APIs of these projects
4) Some design recommendations & guidelines for adopting/ deploying these solutions.
APNIC Foundation, presented by Ellisha Heppner at the PNG DNS Forum 2024APNIC
Ellisha Heppner, Grant Management Lead, presented an update on APNIC Foundation to the PNG DNS Forum held from 6 to 10 May, 2024 in Port Moresby, Papua New Guinea.
Bridging the Digital Gap Brad Spiegel Macon, GA Initiative.pptxBrad Spiegel Macon GA
Brad Spiegel Macon GA’s journey exemplifies the profound impact that one individual can have on their community. Through his unwavering dedication to digital inclusion, he’s not only bridging the gap in Macon but also setting an example for others to follow.
# Internet Security: Safeguarding Your Digital World
In the contemporary digital age, the internet is a cornerstone of our daily lives. It connects us to vast amounts of information, provides platforms for communication, enables commerce, and offers endless entertainment. However, with these conveniences come significant security challenges. Internet security is essential to protect our digital identities, sensitive data, and overall online experience. This comprehensive guide explores the multifaceted world of internet security, providing insights into its importance, common threats, and effective strategies to safeguard your digital world.
## Understanding Internet Security
Internet security encompasses the measures and protocols used to protect information, devices, and networks from unauthorized access, attacks, and damage. It involves a wide range of practices designed to safeguard data confidentiality, integrity, and availability. Effective internet security is crucial for individuals, businesses, and governments alike, as cyber threats continue to evolve in complexity and scale.
### Key Components of Internet Security
1. **Confidentiality**: Ensuring that information is accessible only to those authorized to access it.
2. **Integrity**: Protecting information from being altered or tampered with by unauthorized parties.
3. **Availability**: Ensuring that authorized users have reliable access to information and resources when needed.
## Common Internet Security Threats
Cyber threats are numerous and constantly evolving. Understanding these threats is the first step in protecting against them. Some of the most common internet security threats include:
### Malware
Malware, or malicious software, is designed to harm, exploit, or otherwise compromise a device, network, or service. Common types of malware include:
- **Viruses**: Programs that attach themselves to legitimate software and replicate, spreading to other programs and files.
- **Worms**: Standalone malware that replicates itself to spread to other computers.
- **Trojan Horses**: Malicious software disguised as legitimate software.
- **Ransomware**: Malware that encrypts a user's files and demands a ransom for the decryption key.
- **Spyware**: Software that secretly monitors and collects user information.
### Phishing
Phishing is a social engineering attack that aims to steal sensitive information such as usernames, passwords, and credit card details. Attackers often masquerade as trusted entities in email or other communication channels, tricking victims into providing their information.
### Man-in-the-Middle (MitM) Attacks
MitM attacks occur when an attacker intercepts and potentially alters communication between two parties without their knowledge. This can lead to the unauthorized acquisition of sensitive information.
### Denial-of-Service (DoS) and Distributed Denial-of-Service (DDoS) Attacks
This 7-second Brain Wave Ritual Attracts Money To You.!nirahealhty
Discover the power of a simple 7-second brain wave ritual that can attract wealth and abundance into your life. By tapping into specific brain frequencies, this technique helps you manifest financial success effortlessly. Ready to transform your financial future? Try this powerful ritual and start attracting money today!
2. Index
- Workflows Management Systems
- Architecture
- Building blocks
- More features
- User Interface
- Security
- CLI
- Demo
3. WTH is a Workflow Management System ?
A worflow Management system is:
Is a data-centric software (framework) for :
- Setting up
- Performing
- Monitoring
of a defined sequence of processes and tasks
13. Building blocks
Operators :
- Describes a single task in a workflow.
- Determine what actually gets done
- Operators generally run independently (atomic)
- The DAG make sure that operators run in the correct certain order
- They may run on completely different machines
14. Building blocks
Operators : There are 3 main types of operators:
● Operators that performs an action, or tell another system to perform an action
● Transfer operators move data from one system to another
● Sensors are a certain type of operator that will keep running until a certain criterion is met.
○ Examples include a specific file landing in HDFS or S3.
○ A partition appearing in Hive.
○ A specific time of the day.
19. Tasks : a parameterized instance of an operator
Building blocks
20. Building blocks
Task Instance : Dag + Task + point in time
- Specific run of a Task
- A task assigned to a DAG
- Has State associated with a specific run of the DAG
- States : it could be
- running
- success,
- failed
- skipped
- up for retry
- …
21. Building blocks
Workflows :
● DAG: a description of the order in which work should take place
● Operator: a class that acts as a template for carrying out some work
● Task: a parameterized instance of an operator
● Task Instance: a task that
○ Has been assigned to a DAG
○ Has a state associated with a specific run of the DAG
● By combining DAGs and Operators to create TaskInstances, you can build complex workflows.
24. - Features :
- Hooks
- Connections
- Variables
- XComs
- SLA
- Pools
- Queues
- Trigger Rules
- Branchings
- SubDags
More features
25. Hooks :
- Interface to external platforms and databases :
- Hive
- S3
- MySQL
- PostgreSQL
- HDFS
- Hive
- Pig
- …
- Act as building block for Operators
- Use Connection to retrieve authentication informations
- Keep authentication infos out of pipelines.
More features
29. More features
Variables :
- A generic way to store and retrieve arbitrary content or settings as a simple key value store within Airflow.
- Variables can be listed, created, updated and deleted from the UI (Admin -> Variables), code or CLI.
- While your pipeline code definition and most of your constants and variables should be defined in code and stored in source control, it
can be useful to have some variables or configuration items accessible and modifiable through the UI.
31. XCom or Cross-communication:
● Let tasks exchange messages allowing shared state.
● Defined by a key, value, and timestamp.
● Also track attributes like the task/DAG that created the XCom and when it should become visible.
● Any object that can be pickled can be used as an XCom value.
XComs can be :
● Pushed (sent) :
○ Calling xcom_push()
○ If a task return a value (from its operator execute() method) or from a PythonOperator’s python_callable
● Pulled (received) : calling xcom_pull()
More features
32. More features
SLA :
- Service Level Agreements, or time by which a task or DAG should have succeeded,
- Can be set at a task level as a timedelta.
- An alert email is sent detailing the list of tasks that missed their SLA.
33. More features
Pools :
- Some systems can get overwhelmed when too many processes hit them at the same time.
- Limit the execution parallelism on arbitrary sets of tasks.
35. Queues : (only on CeleryExecutors) :
- Every Task can be assigned a specific queue name
- By default, both worker and tasks are assigned with the default_queue queue
- Workers can be assigned multiple queues
- Very useful feature when specialized workers are needed (GPU, Spark…)
More features
36. More features
Trigger Rules:
Though the normal workflow behavior is to trigger tasks when all their directly upstream tasks have succeeded, Airflow allows for more complex
dependency settings.
All operators have a trigger_rule argument which defines the rule by which the generated task get triggered. The default value for trigger_rule is
all_success and can be defined as “trigger this task when all directly upstream tasks have succeeded”. All other rules described here are based
on direct parent tasks and are values that can be passed to any operator while creating tasks:
● all_success: (default) all parents have succeeded
● all_failed: all parents are in a failed or upstream_failed state
● all_done: all parents are done with their execution
● one_failed: fires as soon as at least one parent has failed, it does not wait for all parents to be done • one_success: fires as soon as at
least one parent succeeds, it does not wait for all parents to be done • dummy: dependencies are just for show, trigger at will.
49. Security
By default : all access are open
Support ;
● Web authentication with :
○ Password
○ LDAP
○ Custom auth
○ Kerberos
○ OAuth
■ Github Entreprise Authentication
■ Google Authentication
● Impersonation (run as other $USER)
● Secure access via SSL
51. Demo
1. Facebook Ads insights data pipeline.
2. Run a pyspark script on a ephemeral dataproc cluster only when s3 data input is available
3. Useless workflow : Hook + Connection + Operators + Sensors + XCom +( SLA ):
○ List s3 files (hooks)
○ Share state with the next task (xcom)
○ Write content to s3 (hooks)
○ Resume the workflow when an S3 DONE.FLAG file is ready (sensor)