Clearly update method about openstreetmap-tile-server

[stevo01]

Hi,
the environment variable "UPDATES" allows you to enable the a periodical update which is running in background.

note: you missed the options "-e UPDATES=enabled" and "-v openstreetmap-rendered-tiles:/var/lib/mod_tile" during import. Both are required to prepare the periodical update in directory "/var/lib/mod_tile/.osmosis".

Here are some useful commands for debugging of the update feature:

connect to docker container shell

docker exec -i -t openstreetmap-tile-server /bin/bash

show` replication timestamp of your importet database

root@360039daaf97:/home/renderer/src/openstreetmap-carto# cat  /var/lib/mod_tile/replication_timestamp.txt 
2019-09-01

show configuration of osmosis

cat /var/lib/mod_tile/.osmosis/configuration.txt 
# The URL of the directory containing change files.
baseUrl=https://planet.openstreetmap.org/replication/minute

# Defines the maximum time interval in seconds to download in a single invocation.
# Setting to 0 disables this feature.
maxInterval = 3600

show logfile / replag

root@5f55bf46f268:/home/renderer/src/openstreetmap-carto# tail -f /var/log/tiles/run.log 
[2019-09-16 19:40:01] 19514 start import from seq-nr 3674571, replag is 1 minute(s)
[2019-09-16 19:40:01] 19514 downloading diff
[2019-09-16 19:40:02] 19514 filtering diff skipped
[2019-09-16 19:40:02] 19514 importing diff
[2019-09-16 19:40:10] 19514 expiring tiles
[2019-09-16 19:40:11] 19514 Done with import
[2019-09-16 19:41:01] 19810 start import from seq-nr 3674572, replag is 1 minute(s)
[2019-09-16 19:41:01] 19810 downloading diff
[2019-09-16 19:41:02] 19810 filtering diff skipped
[2019-09-16 19:41:02] 19810 importing diff
[2019-09-16 19:41:07] 19810 expiring tiles
[2019-09-16 19:41:07] 19810 Done with import

[spearox]

Dear @stevo01,

Thanks for you help! I'll checked it. The update works!