dstandish commented on code in PR #27736:
URL: https://github.com/apache/airflow/pull/27736#discussion_r1027038571
##########
airflow/kubernetes/pod_generator.py:
##########
@@ -445,29 +455,27 @@ def make_unique_pod_id(pod_id: str) -> str | None:
r"""
Kubernetes pod names must consist of one or more lowercase
rfc1035/rfc1123 labels separated by '.' with a maximum length of 253
- characters. Each label has a maximum length of 63 characters.
+ characters.
Name must pass the following regex for validation
``^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$``
+ (But note that this method actually doesn't guarantee that!)
+
For more details, see:
https://github.com/kubernetes/kubernetes/blob/release-1.1/docs/design/identifiers.md
- :param pod_id: a dag_id with only alphanumeric characters
+ :param pod_id: requested pod name
:return: ``str`` valid Pod name of appropriate length
"""
if not pod_id:
return None
- safe_uuid = uuid.uuid4().hex # safe uuid will always be less than 63
chars
-
- # Get prefix length after subtracting the uuid length. Clean up '.'
and '-' from
- # end of podID ('.' can't be followed by '-').
- label_prefix_length = MAX_LABEL_LEN - len(safe_uuid) - 1 # -1 for
separator
- trimmed_pod_id = pod_id[:label_prefix_length].rstrip("-.")
-
- # previously used a '.' as the separator, but this could create errors
in some situations
- return f"{trimmed_pod_id}-{safe_uuid}"
+ max_pod_id_len = 100 # arbitrarily chosen
Review Comment:
haha
yeah it's completely arbitrary. Previously it was 63.
250 is just, quite long. Here's an example of what it looks like with a pod
name of length 101
```
local ❯ k delete pod
static-podstatic-podstatic-podstatic-podstatic-podstatic-podstatic-podstatic-podstatic-podstatic-pod
pod
"static-podstatic-podstatic-podstatic-podstatic-podstatic-podstatic-podstatic-podstatic-podstatic-pod"
deleted
```
I actually have some second thoughts about allowing it to go to 100. Now
that we aren't using up 32 of the characters with a UUID, we would get a lot
more out of those 63 characters....
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