adds a new integration test to verify that the API server's egress
to admission webhooks correctly respects the standard `HTTPS_PROXY`
and `NO_PROXY` environment variables.
It adds a new test util to implement a Fake DNS server that allows
to override DNS resolution in tests, specially useful for integration
test that can only bind to localhost the servers, that is ignored
by certain functionalities.
This brings a few fixes, drops github.com/pkg/errors (as a direct
dependency), and bumps many transitive dependencies. The
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp bump to
v0.61.0 breaks "k8s.io/kubernetes/test/integration/apiserver: tracing"
consistently, so it's held back for now.
github.com/containerd/containerd/api pulls in gopkg.in/yaml.v3 so that
needs to be added to the exceptions in unwanted-dependencies.json.
Signed-off-by: Stephen Kitt <skitt@redhat.com>
KYAML is a strict subset of YAML, which is sort of halfway between YAML
and JSON. It has the following properties:
* Does not depend on whitespace (easier to text-patch and template).
* Always quotes value strings (no ambiguity aroud things like "no").
* Allows quoted keys, but does not require them, and only quotes them if
they are not obviously safe (e.g. "no" would always be quoted).
* Always uses {} for structs and maps (no more obscure errors about
mapping values).
* Always uses [] for lists (no more trying to figure out if a dash
changes the meaning).
* When printing, it includes a header which makes it clear this is YAML
and not ill-formed JSON.
* Allows trailing commas
* Allows comments,
* Tries to economize on vertical space by "cuddling" some kinds of
brackets together.
* Retains comments.
Examples:
A struct:
```yaml
metadata: {
creationTimestamp: "2024-12-11T00:10:11Z",
labels: {
app: "hostnames",
},
name: "hostnames",
namespace: "default",
resourceVersion: "15231643",
uid: "f64dbcba-9c58-40b0-bbe7-70495efb5202",
}
```
A list of primitves:
```yaml
ipFamilies: [
"IPv4",
"IPv6",
]
```
A list of structs:
```yaml
ports: [{
port: 80,
protocol: "TCP",
targetPort: 80,
}, {
port: 443,
protocol: "TCP",
targetPort: 443,
}]
```
A multi-document stream:
```yaml
---
{
foo: "bar",
}
---
{
qux: "zrb",
}
```
