Docker Alpine Linux容器中的Postgres

Question

我正在尝试让PostgreSQL容器中的postgres 10.0工作。我有以下Dockerfile：

FROM postgres:10.0-alpine

RUN apk add openrc --no-cache

USER postgres

RUN /etc/init.d/postgresql start
RUN psql --command "IF NOT EXISTS (SELECT FROM pg_catalog.pg_user WHERE usename = 'user') THEN CREATE USER user WITH SUPERUSER ENCRYPTED PASSWORD 'password'; END IF;"
RUN createdb main

EXPOSE 5432

VOLUME  ["/etc/postgresql", "/var/log/postgresql", "/var/lib/postgresql"]

CMD ["/usr/lib/postgresql/10.0/bin/postgres", "-D", "/var/lib/postgresql/10.0/main", "-c", "config_file=/etc/postgresql/10.0/main/postgresql.conf"]

我收到以下错误：

/bin/sh: /etc/init.d/postgresql: not found

似乎/etc/init.d/postgresql真的不见了。我究竟做错了什么？

Answer 1

我能够使用 exec 命令来完成它，所以我可以在正在运行的容器中运行 postgres，在这种情况下是 alpine 3.7。注意$CONTAINER_NAME是来自docker ps以下位置的容器 ID ：

# Install postgresql, create user, db & start the daemon (for testing)
sudo docker exec $CONTAINER_NAME sh -c 'apk add postgresql'
sudo docker exec $CONTAINER_NAME  sh -c 'addgroup -S postgres && adduser -S postgres -G postgres'
sudo docker exec $CONTAINER_NAME sh -c 'mkdir -p /var/lib/postgresql/data'
sudo docker exec $CONTAINER_NAME sh -c 'mkdir -p /run/postgresql/'
sudo docker exec $CONTAINER_NAME sh -c 'chown -R postgres:postgres /run/postgresql/'
sudo docker exec $CONTAINER_NAME sh -c 'chmod -R 777 /var/lib/postgresql/data'
sudo docker exec $CONTAINER_NAME sh -c 'chown -R postgres:postgres /var/lib/postgresql/data'
sudo docker exec --user postgres $CONTAINER_NAME sh -c 'initdb /var/lib/postgresql/data'
sudo docker exec --user postgres $CONTAINER_NAME sh -c 'echo "host all  all    0.0.0.0/0  md5" >> /var/lib/postgresql/data/pg_hba.conf'
sudo docker exec --user postgres $CONTAINER_NAME  sh -c 'pg_ctl start -D /var/lib/postgresql/data -l /var/lib/postgresql/log.log'
sudo docker exec --user postgres $CONTAINER_NAME sh -c "psql --command \"ALTER USER postgres WITH ENCRYPTED PASSWORD 'buildpgpass';\""
sudo docker exec --user postgres $CONTAINER_NAME sh -c "psql --command \"CREATE DATABASE builddb;\""

您还可以将其包含在您的 Dockerfile 中，如下所示：

# Postgres
RUN apk add postgresql=11.1-r0
RUN (addgroup -S postgres && adduser -S postgres -G postgres || true)
RUN mkdir -p /var/lib/postgresql/data
RUN mkdir -p /run/postgresql/
RUN chown -R postgres:postgres /run/postgresql/
RUN chmod -R 777 /var/lib/postgresql/data
RUN chown -R postgres:postgres /var/lib/postgresql/data
RUN su - postgres -c "initdb /var/lib/postgresql/data"
RUN echo "host all  all    0.0.0.0/0  md5" >> /var/lib/postgresql/data/pg_hba.conf
RUN su - postgres -c "pg_ctl start -D /var/lib/postgresql/data -l /var/lib/postgresql/log.log && psql --command \"ALTER USER postgres WITH ENCRYPTED PASSWORD 'postgres';\" && psql --command \"CREATE DATABASE builddb;\""

如果您想即时测试某些东西，这似乎很有效。

Answer 2

我完成了这个Dockerfile：

FROM postgres:10.0-alpine

USER postgres

RUN chmod 0700 /var/lib/postgresql/data &&\
    initdb /var/lib/postgresql/data &&\
    echo "host all  all    0.0.0.0/0  md5" >> /var/lib/postgresql/data/pg_hba.conf &&\
    echo "listen_addresses='*'" >> /var/lib/postgresql/data/postgresql.conf &&\
    pg_ctl start &&\
    psql -U postgres -tc "SELECT 1 FROM pg_database WHERE datname = 'main'" | grep -q 1 || psql -U postgres -c "CREATE DATABASE main" &&\
    psql --command "ALTER USER postgres WITH ENCRYPTED PASSWORD 'mysecurepassword';"

EXPOSE 5432

这个dockerfile创建数据库'main'（如果不存在），启动postgres并设置默认用户密码