roachtest: cluster_creation failed

roachtest.cluster_creation [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyAwsBazel/20621187?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyAwsBazel/20621187?buildTab=artifacts#/kv0/enc=false/nodes=1) on release-25.4.0-rc @ [1de9c4bc217dca385a4f912dbdf828bc5629711a](https://github.com/cockroachdb/cockroach/commits/1de9c4bc217dca385a4f912dbdf828bc5629711a):

```
test kv0/enc=false/nodes=1 failed: (test_runner.go:873).func4: in provider: aws: failed to run: aws ec2 run-instances --associate-public-ip-address --count 1 --instance-type m7gd.2xlarge --image-id ami-05983a09f7dc1c18f --key-name teamcity-runner-D4togJZGkL_SHybJVt7XQDhrTpE= --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-25-4-0-rc},{Key=cluster,Value=teamcity-20621187-1760767578-26-n2cpu8},{Key=lifetime,Value=12h0m0s},{Key=arch,Value=arm64},{Key=created,Value=2025-10-18T06:34:15Z},{Key=Name,Value=teamcity-20621187-1760767578-26-n2cpu8-0001},{Key=Cluster,Value=teamcity-20621187-1760767578-26-n2cpu8},{Key=spot,Value=true},{Key=roachprod,Value=true}] ResourceType=volume,Tags=[{Key=usage,Value=roachtest},{Key=roachtest-branch,Value=release-25-4-0-rc},{Key=cluster,Value=teamcity-20621187-1760767578-26-n2cpu8},{Key=lifetime,Value=12h0m0s},{Key=arch,Value=arm64},{Key=created,Value=2025-10-18T06:34:15Z},{Key=Name,Value=teamcity-20621187-1760767578-26-n2cpu8-0001},{Key=Cluster,Value=teamcity-20621187-1760767578-26-n2cpu8},{Key=spot,Value=true},{Key=roachprod,Value=true}] --user-data file:///tmp/aws-startup-script2226666137 --iam-instance-profile Name=roachprod-testing --block-device-mapping file:///tmp/aws-block-device-mapping3217083158 --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=8
- 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)

Same failure on other branches

- #155354 roachtest: cluster_creation failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.3]
- #155353 roachtest: cluster_creation failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.3]
- #155352 roachtest: cluster_creation failed [O-roachtest O-robot T-testeng X-infra-flake branch-master]
- #154938 roachtest: cluster_creation failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.3]
- #154936 roachtest: cluster_creation failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.3]
- #154937 roachtest: cluster_creation failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.3]
- #154935 roachtest: cluster_creation failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.3]
- #154855 roachtest: cluster_creation failed [O-roachtest O-robot O-rsg T-testeng X-infra-flake branch-release-24.1.25-rc]
- #154726 roachtest: cluster_creation failed [O-roachtest O-robot T-testeng X-infra-flake branch-master]
- #154725 roachtest: cluster_creation failed [O-roachtest O-robot T-testeng X-infra-flake branch-master]

/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-55534

Start with the linked TeamCity log and artifacts, then read pkg/cmd/roachtest/README.md and compare the related cluster_creation reports listed in the issue. The payload does not identify a source file, test, or intended change, so clarify the scope and completion criteria before starting.

Written by the indexing model from the issue text.