loki.source.docker corrupts logs split by docker #4625
Description
Component(s)
loki.source.docker
What's wrong?
Here is an example of this:
{
"a": 1033461950,
"b": true
},
2025-10-17T22: 40: 09.574025386Z {
"a": 1033471950,
"b": true
},
{
"a": 1034411950,
"b": true
},Steps to reproduce
1.Set up docker JSON logging with alloy and loki.
2.Log something that exceeds the docker line limit and will be split.
System information
No response
Software version
Grafana Alloy v1.11.2
Configuration
discovery.docker "container_logs" {
host = "unix:///var/run/docker.sock"
refresh_interval = "10s"
filter {
name = "label"
values = ["logging=alloy"]
}
}
discovery.relabel "container_logs" {
targets = discovery.docker.container_logs.targets
rule {
source_labels = ["__meta_docker_container_id"]
target_label = "container_id"
}
}
loki.source.docker "container_logs" {
host = "unix:///var/run/docker.sock"
targets = discovery.relabel.container_logs.output
forward_to = [loki.process.container_logs.receiver]
refresh_interval = "10s"
}
loki.process "container_logs" {
forward_to = [loki.write.default.receiver]
}
loki.write "default" {
endpoint {
url = "http://loki:3100/loki/api/v1/push"
}
external_labels = {}
}
Logs
Tip
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