Panic within GCP redis calculating costs

[zdenekpizl-foxdeli]

Describe the bug

panic: runtime error: index out of range [0] with length 0

goroutine 48 [running]:
github.com/tailwarden/komiser/providers/gcp/redis.calculateRedisCost(0xc0009623c0, 0xc00268a540?)
	/home/runner/work/komiser/komiser/providers/gcp/redis/pricing.go:79 +0x365
github.com/tailwarden/komiser/providers/gcp/redis.Instances({0x4231180, 0x6504b20}, {0x0, 0x0, {0x0, 0x0}, 0x0, 0x0, 0x0, 0x0, ...})
	/home/runner/work/komiser/komiser/providers/gcp/redis/instances.go:68 +0x714
github.com/tailwarden/komiser/providers/gcp.FetchResources.func1()
	/home/runner/work/komiser/komiser/providers/gcp/gcp.go:57 +0x99
github.com/tailwarden/komiser/providers.(*WorkerPool).worker(0xc000d9e000)
	/home/runner/work/komiser/komiser/providers/providers.go:85 +0x3a
created by github.com/tailwarden/komiser/providers.(*WorkerPool).Start in goroutine 50
	/home/runner/work/komiser/komiser/providers/providers.go:69 +0x25

To Reproduce
Steps to reproduce the behavior:

1. I run docker image with config.toml set to a GCP account
2. it started, run fetching some objects apparently for a while and then died with message above

Expected behavior

• no panic during fetching objects and doing calculations

Desktop (please complete the following information):

• OS: Ubuntu/Docker
• Browser - it fails without any interaction from UI
• Version:

user@laptop:~$ docker images
REPOSITORY           TAG       IMAGE ID       CREATED       SIZE
tailwarden/komiser   latest    894b195df7ac   10 days ago   150MB

[github-actions]

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[zdenekpizl-foxdeli]

attaching full logs from docker image run, it is interesting although the service's JSON key is for an account with compute/storage admin/owner rights, it reports issues whilst getting i.e. bucket size. Also, there are errors reported about disabled features. Why? Do not report disabled features, they are disabled on purpose and you should quietly skip them AFAIK.

INIT!!!
INFO[2024-05-13T17:56:58Z] Debug logging is enabled                     
INFO[2024-05-13T17:56:58Z] Data will be stored in SQLite                
INFO[2024-05-13T17:56:58Z] migrated to group #1 (20230413100000, 20230602100000, 20230619100000, 20231014100000) 
INFO[2024-05-13T17:56:58Z] Komiser version: 3.1.16, commit: 6732ea4912c9be443ae65a56826db1ea2429a7b3, buildt: 1714753332 
INFO[2024-05-13T17:56:58Z] Fetching resources workflow has started      
INFO[2024-05-13T17:56:58Z] Workflow triggered for client: StageCluster 
ERRO[2024-05-13T17:56:58Z] failed to create alloydb client               error="google: could not find default credentials. See https://cloud.google.com/docs/authentication/external/set-up-adc for more information"
INFO[2024-05-13T17:56:58Z] [StageCluster][GCP] google: could not find default credentials. See https://cloud.google.com/docs/authentication/external/set-up-adc for more information 
ERRO[2024-05-13T17:56:58Z] failed to create alloydb client               error="google: could not find default credentials. See https://cloud.google.com/docs/authentication/external/set-up-adc for more information"
INFO[2024-05-13T17:56:58Z] [StageCluster][GCP] google: could not find default credentials. See https://cloud.google.com/docs/authentication/external/set-up-adc for more information 
ERRO[2024-05-13T17:56:58Z] failed to collect labels                      error="rpc error: code = InvalidArgument desc = Location \"\" does not exist.\nerror details: name = RequestInfo id = 0x82aeaf58fc41e250 data ="
INFO[2024-05-13T17:56:58Z] [StageCluster][GCP] rpc error: code = InvalidArgument desc = Location "" does not exist.
error details: name = RequestInfo id = 0x82aeaf58fc41e250 data = 
ERRO[2024-05-13T17:56:58Z] failed to get app engine                      error="rpc error: code = NotFound desc = Requested entity was not found."
INFO[2024-05-13T17:56:58Z] Fetched resources                             account=StageCluster provider=GCP resources=0 service="App Engine"
ERRO[2024-05-13T17:56:58Z] failed to list all firestore collections      error="rpc error: code = NotFound desc = The database (default) does not exist for project StageCluster Please visit https://console.cloud.google.com/datastore/setup?project=StageCluster to add a Cloud Datastore or Cloud Firestore database."
INFO[2024-05-13T17:56:58Z] [StageCluster][GCP] rpc error: code = NotFound desc = The database (default) does not exist for project StageCluster Please visit https://console.cloud.google.com/datastore/setup?project=StageCluster to add a Cloud Datastore or Cloud Firestore database. 
INFO[2024-05-13T17:56:58Z] Fetched resources                             account=StageCluster provider=GCP resources=0 service="SQL Instances"
INFO[2024-05-13T17:56:58Z] Fetched resources                             account=StageCluster provider=GCP resources=13 service="IAM Service Accounts"
INFO[2024-05-13T17:56:58Z] Fetched resources                             account=StageCluster provider=GCP resources=0 service=BigQuery
INFO[2024-05-13T17:56:58Z] Fetched resources                             account=StageCluster provider=GCP resources=0 service=KMS
INFO[2024-05-13T17:56:59Z] Fetched resources                             account=StageCluster provider=GCP resources=0 service="Compute Disk Snapshot"
INFO[2024-05-13T17:56:59Z] Fetched resources                             account=StageCluster provider=GCP resources=0 service="IAM Custom Roles"
ERRO[2024-05-13T17:56:59Z] failed to get nex image                       error="rpc error: code = InvalidArgument desc = Invalid resource field value in the request.\nerror details: name = ErrorInfo reason = RESOURCE_PROJECT_INVALID domain = googleapis.com metadata = map[method:google.devtools.artifactregistry.v1.ArtifactRegistry.ListDockerImages service:artifactregistry.googleapis.com]"
INFO[2024-05-13T17:56:59Z] Fetched resources                             account=StageCluster provider=GCP resources=0 service="Artifacts Registry Docker Images"
ERRO[2024-05-13T17:56:59Z] failed to get next repo                       error="rpc error: code = InvalidArgument desc = Invalid resource field value in the request.\nerror details: name = ErrorInfo reason = RESOURCE_PROJECT_INVALID domain = googleapis.com metadata = map[method:google.devtools.artifactregistry.v1.ArtifactRegistry.ListRepositories service:artifactregistry.googleapis.com]"
INFO[2024-05-13T17:56:59Z] Fetched resources                             account=StageCluster provider=GCP resources=0 service="Artifacts Registry Repositories"
INFO[2024-05-13T17:56:59Z] Fetched resources                             account=StageCluster provider=GCP resources=0 service="Certificate Manager"
ERRO[2024-05-13T17:56:59Z] failed to get next package                    error="googleapi: Error 404:"
INFO[2024-05-13T17:56:59Z] Fetched resources                             account=StageCluster provider=GCP resources=0 service="Artifacts Registry Packages"
INFO[2024-05-13T17:56:59Z] Fetched resources                             account=StageCluster provider=GCP resources=0 service="Cloud Functions"
DEBU[2024-05-13T17:57:00Z] failed to get bucket size, skipping cost calculation  bucket=gitlab-runner-cache-2c2cd3e7 error="no data found"
INFO[2024-05-13T17:57:00Z] Fetched resources                             account=StageCluster provider=GCP resources=6 service="Compute Engine"
DEBU[2024-05-13T17:57:00Z] failed to get bucket size, skipping cost calculation  bucket=gitlab-runner-cache-4aa8eaf4 error="no data found"
DEBU[2024-05-13T17:57:01Z] failed to get bucket size, skipping cost calculation  bucket=gkestagebackup error="no data found"
DEBU[2024-05-13T17:57:01Z] failed to get bucket size, skipping cost calculation  bucket=private-data-sandbox error="no data found"
INFO[2024-05-13T17:57:02Z] Fetched resources                             account=StageCluster provider=GCP resources=19 service="Compute Disk"
INFO[2024-05-13T17:57:04Z] Fetched resources                             account=StageCluster provider=GCP resources=9 service=Bucket


panic: runtime error: index out of range [0] with length 0

goroutine 48 [running]:
github.com/tailwarden/komiser/providers/gcp/redis.calculateRedisCost(0xc0009623c0, 0xc00268a540?)
	/home/runner/work/komiser/komiser/providers/gcp/redis/pricing.go:79 +0x365
github.com/tailwarden/komiser/providers/gcp/redis.Instances({0x4231180, 0x6504b20}, {0x0, 0x0, {0x0, 0x0}, 0x0, 0x0, 0x0, 0x0, ...})
	/home/runner/work/komiser/komiser/providers/gcp/redis/instances.go:68 +0x714
github.com/tailwarden/komiser/providers/gcp.FetchResources.func1()
	/home/runner/work/komiser/komiser/providers/gcp/gcp.go:57 +0x99
github.com/tailwarden/komiser/providers.(*WorkerPool).worker(0xc000d9e000)
	/home/runner/work/komiser/komiser/providers/providers.go:85 +0x3a
created by github.com/tailwarden/komiser/providers.(*WorkerPool).Start in goroutine 50
	/home/runner/work/komiser/komiser/providers/providers.go:69 +0x25