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Pablo Lalloni

Consul Introduction - 1 views

www.consul.io/index.html

development infrastructure consul tools soa service-discovery health devops

shared by Pablo Lalloni on 21 Jun 14 - No Cached
  • Pablo Lalloni on 21 Jun 14
     
    "Consul has multiple components, but as a whole, it is a tool for discovering and configuring services in your infrastructure. It provides several key features: Service Discovery: Clients of Consul can provide a service, such as api or mysql, and other clients can use Consul to discover providers of a given service. Using either DNS or HTTP, applications can easily find the services they depend upon. Health Checking: Consul clients can provide any number of health checks, either associated with a given service ("is the webserver returning 200 OK"), or with the local node ("is memory utilization below 90%"). This information can be used by an operator to monitor cluster health, and it is used by the service discovery components to route traffic away from unhealthy hosts. Key/Value Store: Applications can make use of Consul's hierarchical key/value store for any number of purposes including: dynamic configuration, feature flagging, coordination, leader election, etc. The simple HTTP API makes it easy to use. Multi Datacenter: Consul supports multiple datacenters out of the box. This means users of Consul do not have to worry about building additional layers of abstraction to grow to multiple regions. Consul is designed to be friendly to both the DevOps community and application developers, making it perfect for modern, elastic infrastructures."
Pablo Lalloni

Microservices and PaaS - Part I | ActiveState - 0 views

www.activestate.com/...microservices-and-paas-part-i

development programming cloud-computing microservices architecture software-architecture software-engineering

shared by Pablo Lalloni on 25 Aug 14 - No Cached
  • Instead of building software that resembles our existing organizations, we should figure out how we want our software to look, then build the organization around that. Or reorganize it if it's already in place.
    • Pablo Lalloni
      Pablo Lalloni on 25 Aug 14
       
      Las implicancias de esta idea en nuestra organización...
  • When deploying a new feature, enhancing or fixing an existing capability, or deploying an experimental line of code, the previous code remains available and accessible. New code is deployed alongside the old code, with mechanisms in place to instantly route to one or another version.
  • Importantly, the old code is not replaced, but remains part of the system, and is kept running. If, as is often the case, the widespread introduction of the new feature results in unforeseen consequences, the feature flag can be toggled off, and the old version is instantly used instead.
  • ...13 more annotations...
  • In a microservices architecture, an application is comprised of a number of small, independent composable services that interact by way of an external published protocol, such as REST, or a messaging service.
  • Each service is focused on an individual targeted business capability, and thus its scope is minimized. For functionality out of scope, the microservice calls out to other microservices via the published protocol.
  • Small independent microservices can be built using the technology best suited for their requirements. No longer does every application component need to be built on a common company-mandated language and framework such as Java/Spring or Ruby on Rails.
  • Similarly, there's no reason to standardize on a single persistence layer across an entire application. Some microservices might best be served by Redis, others by Oracle.
  • Each microservice can be updated independently, no longer requiring the entire application to be redeployed.
  • Microservices drastically improve the time required to push out a new update, allowing a much more agile development process.
  • Many organizations consist of specialized silo teams (UI, database, API, etc) where costly handoffs and intercommunication are required to coordinate all the pieces of application construction. These handoffs cause overhead, and the need for them should be eliminated.
  • With small teams, each focused on an individual microservice, Netflix enables developers to push code to production, instead of getting mired in a complex deployment process involving several teams.
  • With microservices, the old IT mindset just doesn't work.
  • A centralized IT department cannot possibly cover the wide array of technologies spanning all microservices.
  • Instead a DevOps structure, where each team is responsible for the management of the corresponding microservice, is essential.
  • Enable developers to concoct systems of their choosing with minimal or no interaction from IT, management, VPs, hardware or other groups. "Self Service" is one of the major capabilities offered by the cloud and there's every reason to take advantage of this.
  • Now, IT can be considered as a cloud API available to the developer on-demand 24x7, instead of a complex, process-mired division hidden behind obscure process.
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