psql -h localhost fails in init script #474
Description
psql -h localhost fails in init scripts. I encountered this problem while running a third party script I can not change.
Simple Dockerfile to reproduce:
FROM postgres:9.4
COPY ./init.sh /docker-entrypoint-initdb.d/
RUN chmod a+x /docker-entrypoint-initdb.d/init.sh
init.sh:
#!/bin/bash
psql -h localhost -p 5432 -U postgres -d postgres -c 'select 1;'
Output:
psql: could not connect to server: Connection refused
Is the server running on host "localhost" (127.0.0.1) and accepting
TCP/IP connections on port 5432?
could not connect to server: Cannot assign requested address
Is the server running on host "localhost" (::1) and accepting
TCP/IP connections on port 5432?
I tried this on windows and linux and with and without the chmod line. The crucial part in the psql command is the -h localhost option. All other options can be removed and the error still occurs, but if the -h is removed everything works fine.
Does a workaround exist for this?