block

Kubernetes: retrieving services and pods network CIDR block from cluster


Categories: Kubernetes

When configuring networks and loadbalancers, sometimes you need the network CIDR block used by Services of a Kubernetes cluster.  There are various ways to pull this information from different Kubernetes implementations, but one trick that works across implementations is looking at the error message from kubectl if you attempt to create a service at an … Kubernetes: retrieving services and pods network CIDR block from cluster

Ansible: implementing a looping block using include_tasks


Categories: Automation

Ansible blocks provide a convenient way to logically group tasks.  So it is unfortunate that native Ansible syntax does not allow looping to be combined with a block.  Consider the simple conditional block below controlled by a variable ‘do_block_logic’: – name: simple block with conditional block: – name: simple block task1 debug: msg=”hello” – name: … Ansible: implementing a looping block using include_tasks

SaltStack: Setting a jinja2 variable from an inner block scope


Categories: DevOps

When using jinja2 for SaltStack formulas you may be surprised to find that your global scoped variables do not have ability to be modified inside a loop.  Although this is counter intuitive given the scope behavior of most scripting languages it is unfortunately the case that a jinja2 globally scoped variable cannot be modified from … SaltStack: Setting a jinja2 variable from an inner block scope