pgspider redis fdw 试用

目前redis 的fdw有好几个，github 上有一个start 比较高的，但是对于新版本pg 支持不好，目前使用了
https://github.com/nahanni/rw_redis_fdw，以下是docker 镜像的构建以及试用

dockerfile

老样子基于base 镜像构建

 

FROM dalongrong/pgspider:base as build

WORKDIR /app

RUN apt-get update && apt-get install -y libhiredis-dev

RUN wget https://github.com/nahanni/rw_redis_fdw/archive/v1.0.tar.gz && tar zxf v1.0.tar.gz && mv rw_redis_fdw-1.0 redis_fdw && cp -rf redis_fdw /app/postgresql-11.6/contrib/redis_fdw

RUN cd /app/postgresql-11.6/contrib/redis_fdw && make && make install

​

FROM debian:stretch-slim

ENV GOSU_VERSION 1.11

RUN apt-get update && apt-get install -y wget libhiredis-dev libreadline-dev

# explicitly set user/group IDs

RUN set -eux; \

 groupadd -r postgres --gid=999; \

# https://salsa.debian.org/postgresql/postgresql-common/blob/997d842ee744687d99a2b2d95c1083a2615c79e8/debian/postgresql-common.postinst#L32-35

 useradd -r -g postgres --uid=999 --home-dir=/var/lib/postgresql --shell=/bin/bash postgres; \

# also create the postgres user's home directory with appropriate permissions

# see https://github.com/docker-library/postgres/issues/274

 mkdir -p /var/lib/postgresql; \

 chown -R postgres:postgres /var/lib/postgresql

​

RUN wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \

   && chmod +x /usr/local/bin/gosu \

   && gosu nobody true

# make the "en_US.UTF-8" locale so postgres will be utf-8 enabled by default

RUN set -eux; \

   if [ -f /etc/dpkg/dpkg.cfg.d/docker ]; then \

   # if this file exists, we're likely in "debian:xxx-slim", and locales are thus being excluded so we need to remove that exclusion (since we need locales)

   grep -q '/usr/share/locale' /etc/dpkg/dpkg.cfg.d/docker; \

   sed -ri '/\/usr\/share\/locale/d' /etc/dpkg/dpkg.cfg.d/docker; \

   ! grep -q '/usr/share/locale' /etc/dpkg/dpkg.cfg.d/docker; \

   fi; \

   apt-get update; apt-get install -y locales; rm -rf /var/lib/apt/lists/*; \

   localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8

ENV LANG en_US.utf8

​

# install "nss_wrapper" in case we need to fake "/etc/passwd" and "/etc/group" (especially for OpenShift)

# https://github.com/docker-library/postgres/issues/359

# https://cwrap.org/nss_wrapper.html

RUN set -eux; \

   apt-get update; \

   apt-get install -y --no-install-recommends libnss-wrapper; \

   rm -rf /var/lib/apt/lists/*

​

RUN mkdir /docker-entrypoint-initdb.d

COPY --from=build /usr/local/pgspider /usr/local/pgspider

RUN sed -ri "s!^#?(listen_addresses)\s*=\s*\S+.*!\1 = '*'!" /usr/local/pgspider/share/postgresql/postgresql.conf.sample; \

   grep -F "listen_addresses = '*'" /usr/local/pgspider/share/postgresql/postgresql.conf.sample

RUN mkdir -p /var/run/postgresql && chown -R postgres:postgres /var/run/postgresql && chmod 2777 /var/run/postgresql

ENV PATH $PATH:/usr/local/pgspider/bin

ENV PGDATA /var/lib/postgresql/data

RUN mkdir -p "$PGDATA" && chown -R postgres:postgres "$PGDATA" && chmod 777 "$PGDATA"

VOLUME /var/lib/postgresql/data

COPY docker-entrypoint.sh /usr/local/bin/

RUN ln -s usr/local/bin/docker-entrypoint.sh / # backwards compat

ENTRYPOINT ["docker-entrypoint.sh"]

​

EXPOSE 5432

CMD ["postgres"]

参考使用

• 环境准备

version: "3"

services: 

  redis:

    image: redis

    ports:

    - "6379:6379"

  pg-redis:

    image: dalongrong/pgspider:redis

    ports:

    - "5432:5432"

    environment: 

    - "POSTGRES_PASSWORD:dalong"

• 启动

docker-compose up -d 

• 使用

// 创建扩展

CREATE EXTENSION redis_fdw;

// 创建server

CREATE SERVER redis_server 

     FOREIGN DATA WRAPPER redis_fdw 

     OPTIONS (host 'redis', port '6379');

// 创建用户映射，此demo 填写随意的就可以

CREATE USER MAPPING FOR postgres

     SERVER redis_server

     OPTIONS (password 'demo');

//  创建外部表映射,一个可写的string 类型

CREATE FOREIGN TABLE rft_str(

      key TEXT,

      value TEXT,

      expiry INT

  ) SERVER redis_server

    OPTIONS (tabletype 'string');

//  insert 数据

    insert into rft_str values('user_id','dalong',2000);

• 查询效果

 

 

说明

此redis fdw 扩展功能还是比较强的，支持的方法也比较多，当前还没有ga，但是很不错

参考资料

https://github.com/nahanni/rw_redis_fdw
https://github.com/redis/hiredis
https://hub.docker.com/repository/docker/dalongrong/pgspider
https://github.com/rongfengliang/pgspider-docker