PostgreSQL not working on docker when volume is initialized - linux

Question

I am using windows docker
my docker-compose file is as shown below:
version: '3.5'
services:
postgres:
container_name: postgres_container
image: postgres
environment:
POSTGRES_USER: ${POSTGRES_USER:-postgres}
POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-root}
PGDATA: /data/postgres
volumes:
- ./postgres-data:/var/
ports:
- "5432:5432"
restart: unless-stopped
When i build it i get following error log and container exits
Attaching to postgres_container
postgres_container | The files belonging to this database system will be owned by user "postgres".
postgres_container | This user must also own the server process.
postgres_container |
postgres_container | The database cluster will be initialized with locale "en_US.utf8".
postgres_container | The default database encoding has accordingly been set to "UTF8".
postgres_container | The default text search configuration will be set to "english".
postgres_container |
postgres_container | Data page checksums are disabled.
postgres_container |
postgres_container | fixing permissions on existing directory /data/postgres ... ok
postgres_container | creating subdirectories ... ok
postgres_container | selecting dynamic shared memory implementation ... posix
postgres_container | selecting default max_connections ... 100
postgres_container | selecting default shared_buffers ... 128MB
postgres_container | selecting default time zone ... Etc/UTC
postgres_container | creating configuration files ... ok
postgres_container | running bootstrap script ... ok
postgres_container | performing post-bootstrap initialization ... ok
postgres_container | syncing data to disk ... ok
postgres_container |
postgres_container |
postgres_container | Success. You can now start the database server using:
postgres_container |
postgres_container | pg_ctl -D /data/postgres -l logfile start
postgres_container |
postgres_container | initdb: warning: enabling "trust" authentication for local connections
postgres_container | You can change this by editing pg_hba.conf or using the option -A, or
postgres_container | --auth-local and --auth-host, the next time you run initdb.
postgres_container | waiting for server to start....2020-04-17 13:18:31.599 UTC [47] LOG: starting PostgreSQL 12.2 (Debian 12.2-2.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit
postgres_container | 2020-04-17 13:18:31.607 UTC [47] LOG: could not bind Unix address "/var/run/postgresql/.s.PGSQL.5432": Input/output error
postgres_container | 2020-04-17 13:18:31.607 UTC [47] HINT: Is another postmaster already running on port 5432? If not, remove socket file "/var/run/postgresql/.s.PGSQL.5432" and retry.
postgres_container | 2020-04-17 13:18:31.607 UTC [47] WARNING: could not create Unix-domain socket in directory "/var/run/postgresql"
postgres_container | 2020-04-17 13:18:31.607 UTC [47] FATAL: could not create any Unix-domain sockets
postgres_container | 2020-04-17 13:18:31.610 UTC [47] LOG: database system is shut down
postgres_container | stopped waiting
postgres_container | pg_ctl: could not start server
postgres_container | Examine the log output.
postgres_container |
postgres_container | PostgreSQL Database directory appears to contain a database; Skipping initialization
postgres_container |
postgres_container | 2020-04-17 13:18:32.246 UTC [1] LOG: starting PostgreSQL 12.2 (Debian 12.2-2.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit
postgres_container | 2020-04-17 13:18:32.246 UTC [1] LOG: listening on IPv4 address "0.0.0.0", port 5432
postgres_container | 2020-04-17 13:18:32.246 UTC [1] LOG: listening on IPv6 address "::", port 5432
postgres_container | 2020-04-17 13:18:32.255 UTC [1] LOG: could not bind Unix address "/var/run/postgresql/.s.PGSQL.5432": Input/output error
postgres_container | 2020-04-17 13:18:32.255 UTC [1] HINT: Is another postmaster already running on port 5432? If not, remove socket file "/var/run/postgresql/.s.PGSQL.5432" and retry.
postgres_container | 2020-04-17 13:18:32.255 UTC [1] WARNING: could not create Unix-domain socket in directory "/var/run/postgresql"
postgres_container | 2020-04-17 13:18:32.255 UTC [1] FATAL: could not create any Unix-domain sockets
postgres_container | 2020-04-17 13:18:32.259 UTC [1] LOG: database system is shut down
postgres_container exited with code 1
I checked 5432 port its open and no process is using it.
when i remove volume from my docker-compose.yml file it works
perfectly
the volume i am using ./postgres-data is the local directory on my system i want to map it to the PostgreSQL container to restore database.

Answer 1

You are using docker on Windows and mounting the directory where the socket will be created (/var) as volume but windows filesystem doesn't support unix sockets.
Change the configuration in order to:
leave the unix socket (/var/run/postgresql/...) inside the docker without mounting as volume
mount data directory as volume