如何自定义官方PostgreSQL Docker映像的配置文件?
我正在使用官方的Postgres
Docker映像尝试自定义其配置。为此,我使用命令sed
来更改max_connections
例如:
sed -i -e"s/^max_connections = 100.*$/max_connections = 1000/" /var/lib/postgresql/data/postgresql.conf
我尝试了两种方法来应用此配置。第一种是通过将命令添加到脚本并将其复制到init文件夹“ /docker-entrypoint-
initdb.d”中。第二种方法是通过使用“ RUN”命令直接在我的Dockerfile中运行它们(此方法在非官方的Postgresql映像(与配置文件“
/ etc / postgres / …”的路径不同)下工作正常)。在这两种情况下,更改均会失败,因为缺少配置文件(我认为尚未创建)。
我应该如何更改配置?
编辑1:
这是用于创建映像的Dockerfile:
# Database (http://www.cs3c.ma/)FROM postgres:9.4
MAINTAINER Sabbane <contact@cs3c.ma>
ENV TERM=xterm
RUN apt-get update
RUN apt-get install -y nano
ADD scripts /scripts
# ADD scripts/setup-my-schema.sh /docker-entrypoint-initdb.d/
# Allow connections from anywhere.
RUN sed -i -e"s/^#listen_addresses =.*$/listen_addresses = '*'/" /var/lib/postgresql/data/postgresql.conf
RUN echo "host all all 0.0.0.0/0 md5" >> /var/lib/postgresql/data/pg_hba.conf
# Configure logs
RUN sed -i -e"s/^#logging_collector = off.*$/logging_collector = on/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#log_directory = 'pg_log'.*$/log_directory = '\/var\/log\/postgresql'/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#log_filename = 'postgresql-\%Y-\%m-\%d_\%H\%M\%S.log'.*$/log_filename = 'postgresql_\%a.log'/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#log_file_mode = 0600.*$/log_file_mode = 0644/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#log_truncate_on_rotation = off.*$/log_truncate_on_rotation = on/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#log_rotation_age = 1d.*$/log_rotation_age = 1d/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#log_min_duration_statement = -1.*$/log_min_duration_statement = 0/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#log_checkpoints = off.*$/log_checkpoints = on/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#log_connections = off.*$/log_connections = on/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#log_disconnections = off.*$/log_disconnections = on/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^log_line_prefix = '\%t \[\%p-\%l\] \%q\%u@\%d '.*$/log_line_prefix = '\%t \[\%p\]: \[\%l-1\] user=\%u,db=\%d'/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#log_lock_waits = off.*$/log_lock_waits = on/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#log_temp_files = -1.*$/log_temp_files = 0/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#statement_timeout = 0.*$/statement_timeout = 1800000 # in milliseconds, 0 is disabled (current 30min)/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^lc_messages = 'en_US.UTF-8'.*$/lc_messages = 'C'/" /var/lib/postgresql/data/postgresql.conf
# Performance Tuning
RUN sed -i -e"s/^max_connections = 100.*$/max_connections = 1000/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^shared_buffers =.*$/shared_buffers = 16GB/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#effective_cache_size = 128MB.*$/effective_cache_size = 48GB/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#work_mem = 1MB.*$/work_mem = 16MB/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#maintenance_work_mem = 16MB.*$/maintenance_work_mem = 2GB/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#checkpoint_segments = .*$/checkpoint_segments = 32/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#checkpoint_completion_target = 0.5.*$/checkpoint_completion_target = 0.7/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#wal_buffers =.*$/wal_buffers = 16MB/" /var/lib/postgresql/data/postgresql.conf
RUN sed -i -e"s/^#default_statistics_target = 100.*$/default_statistics_target = 100/" /var/lib/postgresql/data/postgresql.conf
VOLUME ["/var/lib/postgresql/data", "/var/log/postgresql"]
CMD ["postgres"]
使用此Dockerfile,构建过程将显示错误: sed: can't read
/var/lib/postgresql/data/postgresql.conf: No such file or directory
回答:
postgres:9.4
您从中继承的图像在声明了一个卷/var/lib/postgresql/data
。从本质上讲,这意味着您无法将任何文件复制到映像中的该路径。更改将被丢弃。
您有几种选择:
您可以使用运行时在运行时将自己的配置文件添加为卷
docker run -v postgresql.conf:/var/lib/postgresql/data/postgresql.conf ...
。但是,我不确定该如何与现有卷交互。您可以在启动容器时复制文件。为此,请将文件复制到构建中不在卷下方的位置,然后从入口点或cmd调用脚本,该脚本会将文件复制到正确的位置并启动postgres。
在Postgres官方映像后面克隆项目,并编辑Dockerfile以在声明VOLUME之前添加自己的配置文件(在运行时自动复制VOLUME指令之前添加的任何内容)。
在docker-compose文件中的命令选项中传递所有配置更改
喜欢:
services: postgres:
...
command:
- "postgres"
- "-c"
- "max_connections=1000"
- "-c"
- "shared_buffers=3GB"
- "-c"
...
以上是 如何自定义官方PostgreSQL Docker映像的配置文件? 的全部内容, 来源链接: utcz.com/qa/433468.html