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Posts by Iizuki
Ok I got it working again. The issue was that I had updated my kubeconfig file, and the current-context setting had changed. This setting essentially selects which cluster kubectl targets. Now th...
Sometimes there are empty files named .gitkeep sprinkled around a repository. What are these files?
When writing a dynamic web service, you broadly speaking have two paths: Use an existing web server (e.g. Apache, Nginx or Lighttpd) to handle the "raw" web requests and implement your own cod...
Unlike docker, Podman won't (understandably) use docker hub by default. You can use it explicitly like this: (just using a random example here, it's an OpenAPI linter) podman pull docker.io/dshanl...
SAML service provider (and other types as well) metadata XMLs are full of prefixes like md: and ds:. What do these mean? To illustrate my point, here's a sample metadata file from Wikipedia (CC-BY...
A jinja template expression starts and ends with double curly brackets, which the templating engine consumes. But what if you need a single pair of curly brackets left in the output? Something lik...
In a JSON schema, do the required properties need to be a subset of properties? E.g. is this a valid schema, even though cookies isn't mentioned in properties? { "type": "object", "properti...
Use the quiet parameter: - name: Assertions ansible.builtin.assert: that: - item quiet: true loop: "{{ loop_items }}" vars: loop_items: - true - true ...
The prefixes are explained in saml-metadata-2.0-os spec in section 1.1: "Notation" Prefix Explanation saml: This is the SAML V2.0 assertion namespace [SAMLCore]. The prefix is gen...
According to my reading of the JSON Schema Spec, the answer is no. required array can contain elements which are not in the properties dictionary. The example schema in question seems to be valid....
Apparently there just isn't an equivalent of additionalProperties in Ansible. The way around this is to break the dictionary argument into a list of key/value pairs: argument_specs: main: ...
In JSON Schema one can use the additionalProperties key to validate properties whose names are not know. You can still impose restrictions on their type. How to do this in an Ansible role argument...
Turns out I wasn't far off. The dictionary mustn't be quoted. So the following works: - name: Extraction test vars: dictionary: one: 1 two: 2 key_list: - one ...
Ansible's extract filter is supposedly made for use in map, but at the time of writing the documentation doesn't actually show how to use it together with the map filter. The following outputs VAR...
How to delete a local git branch which hasn't been pushed to anywhere, and only exists locally?
Looping in Ansible usually produces a neat output of one line per iteration (per host): ... ok: [Arch] => (item=something) ok: [Arch] => (item=something_else) ok: [Arch] => (item=yet_a...
What is the default port number of MariaDB database server? (Remembering defaults is surprisingly hard since usually you don't need to specify them..)
The simplest solution I managed to find is robusta. It still has a bunch of unnecessary features, but with the correct configuration it's possible to disable these. As a bonus, it nicely adds some...
I'm getting an error when trying to open a shell to a pod. This used to work. $ kubectl exec --tty --stdin --namespace my-ns my-pod -- sh Error from server (BadRequest): Upgrade request required ...
Distroless images use a user called nonroot by convention. What's the UID (User ID) of this user? This is relevant in multi-stage image builds: FROM bash:latest as builder RUN adduser adduser ...
The UID of nonroot user is 65532. This is by convention. I failed to find a reputable source for this, but looking around image internals, it seems to hold.
You don't actually need the UID in that particular example. A more elegant solution would be to use the --chown option of the COPY directive. FROM bash:latest as builder RUN adduser adduser \ ...
Probably just backwards compatibility with past C++ versions, where NULL = 0.
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