In the previous article, we showed how useful are ad-hoc commands. They allow us to run individual tasks on multiple nodes. Ad hoc commands are used on an ad hoc basis, hence their name. Their limitation is that they can only perform one module with one set of arguments at a time. It happens, that
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Sending ad-hoc commands is very simple and at the same time opens up many very useful possibilities. Thanks to them, we can conveniently issue single command on one or many nodes. Issuing such commands allows among others: querying for various statuses, compliance verification, configuration backup, node or service restart, file, package and user accounts management,
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Making changes manually is tedious, and problematic in terms of documenting. Ansible addresses both of these problems. It’s great for what we don’t like. It is doing the same thing on many elements. In addition, the resulting YAML file becomes a form of documentation. It certainly will not replace the typical documentation with diagrams, tables
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When we hear about automation, we often see the image of robots and machines replacing people and taking their jobs. Let’s not go to extremes and let’s not be deceived by these myths. Let’s look at it from a different perspective. Automation in practice – let’s warm-up! To perform low-level, repetitive and monotonous activities, you
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In the first part of this article, we wrote about high-performance packet processing at the network adapter level using XDP and eBPF, and about the possibility of achieving greater throughput with lower latency, thanks to the BBR algorithm for TCP. These two new possibilities of the RHEL8 system bring benefits to everyone, regardless of the
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No one likes renovations. Changes in IT systems and data centers will continue to be more and more noticeable and expensive. The reason for this is the increasing complexity of these environments, as well as the growing amount of data, services and applications. This year, on May 7 2019, the 8th version of Red Hat
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Growing market expectations to deliver services on demand with minimized waiting time has strong influence on IT services. It can be observed that during past years the central point of interest of IT services is automation of all parts that can be automated. Most business processes went through transformation to exclude as many wastes as
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Complexity and the amount of applications and services in today’s IT environments are still growing. Manual management increases not only the security and not compliance risks, but also the time needed to detect and remove it. The same applies to the continuity of IT system services and errors – as much as 17% of data
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Ansible has stolen the hearts of many Ops people Quite recently, during an AWS workshop, one of the topics was AWS OpsWorks. OpsWorks is actually a service that provides managed instances of Chef or Puppet. AWS admins and DevOps have been asked: “How do you automate configuration changes in your AWS environments?”. And, majority answered:
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