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Increased promtail's backoff settings in prod and improved doc #1083

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Oct 7, 2019
Merged

Increased promtail's backoff settings in prod and improved doc #1083

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31 changes: 29 additions & 2 deletions docs/clients/promtail/troubleshooting.md
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Original file line number Diff line number Diff line change
Expand Up @@ -54,10 +54,37 @@ clients:
- url: INGESTER-URL
backoff_config:
minbackoff: 100ms
maxbackoff: 5s
maxretries: 5
maxbackoff: 10s
maxretries: 10
```

The following table shows an example of the total delay applied by the backoff algorithm
with `minbackoff: 100ms` and `maxbackoff: 10s`:

| Retry | Min delay | Max delay | Total min delay | Total max delay |
| ----- | --------- | --------- | --------------- | --------------- |
| 1 | 100ms | 200ms | 100ms | 200ms |
| 2 | 200ms | 400ms | 300ms | 600ms |
| 3 | 400ms | 800ms | 700ms | 1.4s |
| 4 | 800ms | 1.6s | 1.5s | 3s |
| 5 | 1.6s | 3.2s | 3.1s | 6.2s |
| 6 | 3.2s | 6.4s | 6.3s | 12.6s |
| 7 | 6.4s | 10s | 12.7s | 22.6s |
| 8 | 6.4s | 10s | 19.1s | 32.6s |
| 9 | 6.4s | 10s | 25.5s | 42.6s |
| 10 | 6.4s | 10s | 31.9s | 52.6s |
| 11 | 6.4s | 10s | 38.3s | 62.6s |
| 12 | 6.4s | 10s | 44.7s | 72.6s |
| 13 | 6.4s | 10s | 51.1s | 82.6s |
| 14 | 6.4s | 10s | 57.5s | 92.6s |
| 15 | 6.4s | 10s | 63.9s | 102.6s |
| 16 | 6.4s | 10s | 70.3s | 112.6s |
| 17 | 6.4s | 10s | 76.7s | 122.6s |
| 18 | 6.4s | 10s | 83.1s | 132.6s |
| 19 | 6.4s | 10s | 89.5s | 142.6s |
| 20 | 6.4s | 10s | 95.9s | 152.6s |


## Log entries pushed after a `promtail` crash / panic / abruptly termination

When `promtail` shuts down gracefully, it saves the last read offsets in the
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2 changes: 1 addition & 1 deletion production/helm/promtail/values.yaml
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Expand Up @@ -113,7 +113,7 @@ config:
# Maximum backoff time between retries
maxbackoff: 5s
# Maximum number of retries when sending batches, 0 means infinite retries
maxretries: 5
maxretries: 20

# The labels to add to any time series or alerts when communicating with loki
external_labels: {}
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