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Tweak migration doc (#3430)

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Brian Brazil 2017-11-08 08:38:28 +00:00
parent b3b6538348
commit 5dff97639f
1 changed files with 11 additions and 11 deletions
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22
docs/migration.md
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@ -98,11 +98,11 @@ Would look like this:
groups:
- name: example.rules
rules:
- record: job:request_duration_seconds:99percentile
- record: job:request_duration_seconds:histogram_quantile99
expr: histogram_quantile(0.99, sum(rate(request_duration_seconds_bucket[1m]))
BY (le, job))
- alert: FrontendRequestLatency
expr: job:request_duration_seconds:99percentile{job="frontend"} > 0.1
expr: job:request_duration_seconds:histogram_quantile99{job="frontend"} > 0.1
for: 5m
annotations:
summary: High frontend request latency
@ -115,30 +115,30 @@ new format. For example:
$ promtool update rules example.rules
```
Note that you will need to use promtool from 2.0, not 1.8.
## Storage
The data format in Prometheus 2.0 has completely changed and is not backwards
compatible with 1.8. To retain access to your historic monitoring data we recommend
you run a non-scraping Prometheus 1.8.1 instance in parallel with your Prometheus 2.0
instance, and have the new server read existing data from the old one via the
remote write protocol.
compatible with 1.8. To retain access to your historic monitoring data we
recommend you run a non-scraping Prometheus instance running at least version
1.8.1 in parallel with your Prometheus 2.0 instance, and have the new server
read existing data from the old one via the remote write protocol.
Your Prometheus 1.8 instance should be started with the following flags and an
empty config file (`empty.yml`):
config file containing only the `external_labels` setting (if any):
```
$ ./prometheus-1.8.1.linux-amd64/prometheus -web.listen-address ":9094" -config.file empty.yml
$ ./prometheus-1.8.1.linux-amd64/prometheus -web.listen-address ":9094" -config.file old.yml
```
NOTE: **NOTE** If you used external labels in your Prometheus 2.0 config, they need to be
preserved in your Prometheus 1.8 config.
Prometheus 2.0 can then be started (on the same machine) with the following flags:
```
$ ./prometheus-2.0.0.linux-amd64/prometheus --config.file prometheus.yml
```
Where `prometheus.yml` contains the stanza:
Where `prometheus.yml` contains in addition to your full existing configuration, the stanza:
```
remote_read: