Grafana Loki Logs Storage and Deletion - grafana-loki

Question

I installed Grafana and Loki on my local kubernetes cluster (minikube). I was able to add Loki as a datasource and see the logs being generated on my cluster. For context, I helm installed the loki-stack helm chart. I didn't do it by writing a yaml. I have a few questions about log storage and deletion.
• What is the default storage space for logs and how would one go about deleting them? I came across this but I'm having a hard time understanding where I would configure the retention/deletion properties mentioned in that page. Any help with this will be appreciated.
• By default, after how long do the logs get deleted from the default storage space?
Also, this is what I see when I run (indentation might be off).
helm show values loki/loki-stack
loki:
enabled: true
promtail:
enabled: true
fluent-bit:
enabled: false
grafana:
enabled: false
sidecar:
datasources:
enabled: true
image:
tag: 6.7.0
prometheus:
enabled: false
filebeat:
enabled: false
filebeatConfig:
filebeat.yml: |
# logging.level: debug
filebeat.inputs:
- type: container
paths:
- /var/log/containers/*.log
processors:
- add_kubernetes_metadata:
host: ${NODE_NAME}
matchers:
- logs_path:
logs_path: "/var/log/containers/"
output.logstash:
hosts: ["logstash-loki:5044"]
logstash:
enabled: false
image: grafana/logstash-output-loki
imageTag: 1.0.1
filters:
main: |-
filter {
if [kubernetes] {
mutate {
add_field => {
"container_name" => "%{[kubernetes][container][name]}"
"namespace" => "%{[kubernetes][namespace]}"
"pod" => "%{[kubernetes][pod][name]}"
}
replace => { "host" => "%{[kubernetes][node][name]}"}
}
}
mutate {
remove_field => ["tags"]
}
}
outputs:
main: |-
output {
loki {
url => "http://loki:3100/loki/api/v1/push"
#username => "test"
#password => "test"
}
# stdout { codec => rubydebug }
}