我在Docker容器中运行PostgreSQL（OS X 10.11.6上的Docker 17.09.0-ce-mac35），并且我在主机上的Python应用程序中插入数据。过了一会儿，我在Python中始终遇到以下错误，而主机上仍有足够的磁盘空间：
psycopg2.OperationalError: could not extend file "base/16385/24599.49": wrote only 4096 of 8192 bytes at block 6543502
HINT: Check free disk space.
这是我的docker-compose.yml：
version: "2"
services:
rabbitmq:
container_name: rabbitmq
build: ../messaging/
ports:
- "4369:4369"
- "5672:5672"
- "25672:25672"
- "15672:15672"
- "5671:5671"
database:
container_name: database
build: ../database/
ports:
- "5432:5432"
数据库Dockerfile如下所示：
FROM ubuntu:17.04
RUN echo "deb http://apt.postgresql.org/pub/repos/apt/ zesty-pgdg main" > /etc/apt/sources.list.d/pgdg.list
RUN apt-get update && apt-get install -y --allow-unauthenticated python-software-properties software-properties-common postgresql-10 postgresql-client-10 postgresql-contrib-10
USER postgres
RUN /etc/init.d/postgresql start &&\
psql --command "CREATE USER ****** WITH SUPERUSER PASSWORD '******';" &&\
createdb -O ****** ******
RUN echo "host all all 0.0.0.0/0 md5" >> /etc/postgresql/10/main/pg_hba.conf
RUN echo "listen_addresses='*'" >> /etc/postgresql/10/main/postgresql.conf
EXPOSE 5432
VOLUME ["/etc/postgresql", "/var/log/postgresql", "/var/lib/postgresql"]
CMD ["/usr/lib/postgresql/10/bin/postgres", "-D", "/var/lib/postgresql/10/main", "-c", "config_file=/etc/postgresql/10/main/postgresql.conf"]
df -k输出：
Filesystem 1024-blocks Used Available Capacity iused ifree %iused Mounted on
/dev/disk2 1088358016 414085004 674017012 39% 103585249 168504253 38% /
devfs 190 190 0 100% 658 0 100% /dev
map -hosts 0 0 0 100% 0 0 100% /net
map auto_home 0 0 0 100% 0 0 100% /home
更新1：
似乎容器现已关闭。在重新关闭之前，我将重新开始尝试df -k容器。
2017-11-14 14:48:25.117 UTC [18] HINT: In a moment you should be able to reconnect to the database and repeat your command.
2017-11-14 14:48:25.120 UTC [17] WARNING: terminating connection because of crash of another server process
2017-11-14 14:48:25.120 UTC [17] DETAIL: The postmaster has commanded this server process to roll back the current transaction and exit, because another server process exited abnormally and possibly corrupted shared memory.
2017-11-14 14:48:25.120 UTC [17] HINT: In a moment you should be able to reconnect to the database and repeat your command.
2017-11-14 14:48:25.132 UTC [1] LOG: all server processes terminated; reinitializing
2017-11-14 14:48:25.175 UTC [1] FATAL: could not access status of transaction 0
2017-11-14 14:48:25.175 UTC [1] DETAIL: Could not write to file "pg_notify/0000" at offset 0: No space left on device.
2017-11-14 14:48:25.181 UTC [1] LOG: database system is shut down
更新2：
容器上的df -k，/dev/vda2似乎很快就会填满：
$ docker exec -it database df -k
Filesystem 1K-blocks Used Available Use% Mounted on
none 61890340 15022448 43700968 26% /
tmpfs 65536 0 65536 0% /dev
tmpfs 1023516 0 1023516 0% /sys/fs/cgroup
/dev/vda2 61890340 15022448 43700968 26% /etc/postgresql
shm 65536 8 65528 1% /dev/shm
tmpfs 1023516 0 1023516 0% /sys/firmware
更新3：
这似乎与Docker.qcow2的~64 GB文件大小限制有关。解决使用qemu和gparted如下：
cd ~/Library/Containers/com.docker.docker/Data/com.docker.driver.amd64-linux/
qemu-img info Docker.qcow2
qemu-img resize Docker.qcow2 +200G
qemu-img info Docker.qcow2
qemu-system-x86_64 -drive file=Docker.qcow2 -m 512 -cdrom ~/Downloads/gparted-live-0.30.0-1-i686.iso -boot d -device usb-mouse -usb