roachtest: cluster_creation failed

roachtest.cluster_creation [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyAwsBazel/20831319?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyAwsBazel/20831319?buildTab=artifacts#/ycsb/E/nodes=3/cpu=32) on release-25.2 @ [2b91553a89b7ad4f471352cd8881183601537a95](https://github.com/cockroachdb/cockroach/commits/2b91553a89b7ad4f471352cd8881183601537a95):

```
test ycsb/E/nodes=3/cpu=32 failed: (test_runner.go:840).func4: in provider: aws: failed to run: aws ec2 run-instances --associate-public-ip-address --count 1 --instance-type c6id.8xlarge --image-id ami-0e83be366243f524a --key-name teamcity-runner-pdFZfZC3SR2SzIC9duU-E6B2n8g= --region us-east-2 --security-group-ids sg-04d72b57e29d671f1 --subnet-id subnet-0258dc9d1b6473d84 --tag-specifications ResourceType=instance,Tags=[{Key=usage,Value=roachtest},{Key=roachtest-branch,Value=release-25-2},{Key=Cluster,Value=teamcity-20831319-1765262131-65-n4cpu32},{Key=spot,Value=true},{Key=roachprod,Value=true},{Key=cluster,Value=teamcity-20831319-1765262131-65-n4cpu32},{Key=lifetime,Value=12h0m0s},{Key=arch,Value=amd64},{Key=created,Value=2025-12-09T08:33:51Z},{Key=Name,Value=teamcity-20831319-1765262131-65-n4cpu32-0002}] ResourceType=volume,Tags=[{Key=usage,Value=roachtest},{Key=roachtest-branch,Value=release-25-2},{Key=Cluster,Value=teamcity-20831319-1765262131-65-n4cpu32},{Key=spot,Value=true},{Key=roachprod,Value=true},{Key=cluster,Value=teamcity-20831319-1765262131-65-n4cpu32},{Key=lifetime,Value=12h0m0s},{Key=arch,Value=amd64},{Key=created,Value=2025-12-09T08:33:51Z},{Key=Name,Value=teamcity-20831319-1765262131-65-n4cpu32-0002}] --user-data file:///tmp/aws-startup-script3745005122 --iam-instance-profile Name=roachprod-testing --block-device-mapping file:///tmp/aws-block-device-mapping3895798012 --instance-market-options MarketType=spot,SpotOptions={SpotInstanceType=one-time,InstanceInterruptionBehavior=terminate} --output json: stderr:
An error occurred (InsufficientInstanceCapacity) when calling the RunInstances operation (reached max retries: 2): There is no Spot capacity available that matches your request.: exit status 254 [owner=test-eng]
```

Parameters:
- cloud=aws
- coverageBuild=false
- cpu=32
- runtimeAssertionsBuild=false
- ssd=0
Help

See: [roachtest README](https://github.com/cockroachdb/cockroach/blob/master/pkg/cmd/roachtest/README.md)

See: [How To Investigate \(internal\)](https://cockroachlabs.atlassian.net/l/c/SSSBr8c7)

/cc @cockroachdb/test-eng

[This test on roachdash](https://roachdash.crdb.dev/?filter=status:open%20t:.*cluster_creation.*&sort=title+created&display=lastcommented+project) | [Improve this report!](https://github.com/cockroachdb/cockroach/tree/master/pkg/cmd/bazci/githubpost/issues)

Jira issue: CRDB-57619

Start with the linked TeamCity build log and artifacts, then read pkg/cmd/roachtest/README.md and the cluster_creation roachtest entry point. Confirm how AWS Spot capacity failures are handled and review the 243-comment thread for any agreed direction. Done is not defined by the issue, so the expected behavior must be established before implementation.

Written by the indexing model from the issue text.