Author: Diego Woitasen

Availability & Scalability - DevOps - Infrastructure as Code

Failover is dead

When doing a quick Google search of the keywords “failover meaning”, you will find this definition: “a procedure by which a system automatically transfers control to a duplicate system when it detects a fault or failure.” The definition is perfect, but the concept is broken. Failover is broken. It was ostensibly a good idea years…

Automation - OpenStack

OpenStack: Dell Equallogic controlled by Cinder

Last week a client arrived with new hardware. A Dell Equallogic PS6210XS storage that should be integrated to OpenStack. It was the first time with this model but it worked in the first shoot. In the [DEFAULT] section of cinder.conf we added: [codesyntax lang=”ini”] volume_driver = cinder.volume.drivers.eqlx.DellEQLSanISCSIDriver san_ip = 10.10.10.10 san_login: grpadmin san_password: grpadmin eqlx_group_name: groupname1 eqlx_pool: poolname1 [/codesyntax] Cinder was restarted…

Automation - DevOps - Infrastructure as Code

SaltStack and Terraform: Installing Minions in ec2 instances

Terraform is a great orchestration tool and SaltStack is great configuration management software. The first one allows you to create resources in the cloud (instances, load balancer, databases, etc) and the second is used to provision the instances. Salt works in a master-agent mode, the agents are called minions. To provision an instance you have…

Automation - Infrastructure as Code

Chef: How to regenerate the validation key

Today I’ve lost the Chef validation key of one the servers that we have around. I haven’t found how to recover it in a quick Google search, so… good reason to write this short post. The validation “thing”, is a client (not an user) in Chef which has permission to register new Chef clients to…

Infrastructure as Code - Security & Compliance

Salt and the bash security issue

Yesterday was published a Bash security issue. Details here. So, we needed to upgrade your instance very quickly. Thanksfully, we have SaltStack managing it. The procedure was simple as described below. To update our systems with Salt, just run: salt ‘*’ pkg.install bash refresh=True And to be sure that new nodes are deployed with the…