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It's about named volumes (so no 'data volume container', no 'volumes-from') and docker-compose.yml.
The goal here is to use docker-compose to manage two services 'appserver' and 'server-postgresql' in two separate containers and use the 'volumes:' docker-compose.yml feature to make data from service 'server-postgresql' persistent.
The Dockerfile for 'server-postgresql' looks like this:
1 0 Math
Adn the docker-compose.yml looks like this:
Then I start everything with docker-compose up -d
, I enter my server-postgresql container with docker-compose exec server-postgresql bash
, a quick ls
does reveal /volume_data
, I then cd
into it and try touch testFile
and got 'permission denied. Which is normal because a quick ls -l
show that volume_data
is owned by root:root
.
Now what I think is happening is that since I have USER postgres
in the Dockerfile, when I run docker-compose exec
I am logged in as user 'postgres' (and the postgresql daemon runs as user 'postgres' as well, so it won't be able to write to /volume_data
).
This is confirmed because when I run this instead: docker-compose exec --user root server-postgresql bash
and retry to cd /volume_data
and touch testFile
, it does work (it's not a permission error between the host and the container, as it is somtimes the case when the container mounts a host folder, this is a typical unix permission error because /volume_data
is mounted as 'root:root' while user 'postgres' is trying to write).
So there should be a way in docker-compose.yml to mount namedvolumes as specific user, smth like:
The only dirty workaround that I can think of is remove the USER posgres
directive from the Dockerfile, and change the ENTRYPOINT so that it points to a custom 'init_script.sh' (wihch would be run as 'root' since I removed USER postgres
), this script would change permissions of /volume_data
so that 'postgres' can write on it, then su postgres
and execute the postgresql daemon (in foreground). But this is actually very dirty, because it links the Dockerfile and docker-compose.yml in a non standard way (runtime ENTRYPOINT would rely on the fact that a mounted volume is made available by docker-compose.yml).
Help us with the translation project on http://crowdin.net/project/wifi-connection-manager
NOTE: According to the change of Google Play Mobile Ads policy, devices before Android 2.3 are no longer be supported.
Legacy devices can download the app from: http://www.roamingsoft.com/android/WifiManagerLegacy.apk
1. Support AP (Access Points) SSID with special characters, such as Chinese, Japanese, Korean, Greeks, Russian, Arabic, Portuguese, UNICODE and so on.
2. Display saved network password. (require device to be rooted)
3. Fix device Wi-Fi problems.
4. Instant connect. Once searched, once start connecting. Way faster than the system build-in Wi-Fi scanner.
5. Static IP settings support. Auto switch between different AP.
6. Switch between available networks, solving the network conflict problem.
7. Add/Connect to certain hidden SSID network (depends on device and network conditions).
8. Manual add network, with special support for EAP/LEAP encrypted network.
9. Pause scan, convenient to browse many results.
10. More detail network information, network bandwidth, channel and network type.
11. Auto detect Web Authentication.
12. Backup/Restore saved networks.
13. Add/Share Wi-Fi network with QR code.
14. Arrange network connecting priority.
15. WPS (Wi-Fi Protected Setup) support for Android 4.0 or above devices.
16. Automatical switch between saved networks when signal is not ideal.
17. Wi-Fi tether (Wi-Fi Hotspot) support.
About the required permissions:
Camera is for adding Wi-Fi network via QR code.
Phone and Internet is for the AdMob plug-in made by Google.
Storage is for backup and restore saved network.