Colon symbol gets removed from the filter query #4186
Description
Component(s)
prometheus.exporter.gcp
What's wrong?
The : (colon) symbol gets removed from the filter query in extra_filters block and there is no way to quote or escape it.
Steps to reproduce
Use this configuration:
logging {
level = "debug"
format = "logfmt"
}
prometheus.exporter.gcp "storage" {
project_ids = [
"your_project_id",
]
metrics_prefixes = [
"cloudsql.googleapis.com/database/cpu",
]
extra_filters = [
"cloudsql.googleapis.com/database/cpu:resource.labels.database_id=\"your_project_id:your_database_name\"",
]
}
and see the following logs:
ts=2025-08-13T10:40:09.037420454Z
level=debug
msg="retrieving Google Stackdriver Monitoring metrics with filter"
component_path=/
component_id=prometheus.exporter.gcp.storage
project_id=your_project_id
filter="metric.type=\"cloudsql.googleapis.com/database/cpu/usage_time\"
AND (resource.labels.database_id=\"your_project_idyour_database_name\")"
So, it deletes the : (colon) symbol from the initial filter query your_project_id:your_database_name turning it into your_project_idyour_database_name.
It seems there was a similar problem on the Stackdriver Exporter side, and they resolved it with this PR.
System information
No response
Software version
Grafana Alloy v1.10.0
Configuration
logging {
level = "debug"
format = "logfmt"
}
prometheus.exporter.gcp "storage" {
project_ids = [
"your_project_id",
]
metrics_prefixes = [
"cloudsql.googleapis.com/database/cpu",
]
extra_filters = [
"cloudsql.googleapis.com/database/cpu:resource.labels.database_id=\"your_project_id:your_database_name\"",
]
}
Logs
ts=2025-08-13T10:40:09.037420454Z
level=debug
msg="retrieving Google Stackdriver Monitoring metrics with filter"
component_path=/
component_id=prometheus.exporter.gcp.storage
project_id=your_project_id
filter="metric.type=\"cloudsql.googleapis.com/database/cpu/usage_time\"
AND (resource.labels.database_id=\"your_project_idyour_database_name\")"
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