## [Redis](https://hub.docker.com/_/redis/)

### 基本信息
[Redis](https://en.wikipedia.org/wiki/Redis) 是开源的内存 Key-Value 数据库实现。

该仓库位于 https://hub.docker.com/_/redis/，提供了 Redis 3.x 各个版本的镜像。

### 使用方法
默认会在 `6379` 端口启动数据库。

```
$ docker run --name some-redis -d redis
```
另外还可以启用 [持久存储](http://redis.io/topics/persistence)。

```
$ docker run --name some-redis -d redis redis-server --appendonly yes
```

默认数据存储位置在 `VOLUME/data`。可以使用 `--volumes-from some-volume-container` 或 `-v /docker/host/dir:/data` 将数据存放到本地。

使用其他应用连接到容器，可以用

```
$ docker run --name some-app --link some-redis:redis -d application-that-uses-redis
```
或者通过 `redis-cli`

```
$ docker run -it --link some-redis:redis --rm redis sh -c 'exec redis-cli -h "$REDIS_PORT_6379_TCP_ADDR" -p "$REDIS_PORT_6379_TCP_PORT"'
```

### Dockerfile
#### 3.0 版本
```
FROM debian:jessie

# add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
RUN groupadd -r redis && useradd -r -g redis redis

RUN apt-get update && apt-get install -y --no-install-recommends \
		ca-certificates \
		wget \
	&& rm -rf /var/lib/apt/lists/*

# grab gosu for easy step-down from root
ENV GOSU_VERSION 1.7
RUN set -x \
	&& wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \
	&& wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \
	&& export GNUPGHOME="$(mktemp -d)" \
	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
	&& gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
	&& rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc \
	&& chmod +x /usr/local/bin/gosu \
	&& gosu nobody true

ENV REDIS_VERSION 3.0.7
ENV REDIS_DOWNLOAD_URL http://download.redis.io/releases/redis-3.0.7.tar.gz
ENV REDIS_DOWNLOAD_SHA1 e56b4b7e033ae8dbf311f9191cf6fdf3ae974d1c

# for redis-sentinel see: http://redis.io/topics/sentinel
RUN buildDeps='gcc libc6-dev make' \
	&& set -x \
	&& apt-get update && apt-get install -y $buildDeps --no-install-recommends \
	&& rm -rf /var/lib/apt/lists/* \
	&& wget -O redis.tar.gz "$REDIS_DOWNLOAD_URL" \
	&& echo "$REDIS_DOWNLOAD_SHA1 *redis.tar.gz" | sha1sum -c - \
	&& mkdir -p /usr/src/redis \
	&& tar -xzf redis.tar.gz -C /usr/src/redis --strip-components=1 \
	&& rm redis.tar.gz \
	&& make -C /usr/src/redis \
	&& make -C /usr/src/redis install \
	&& rm -r /usr/src/redis \
	&& apt-get purge -y --auto-remove $buildDeps

RUN mkdir /data && chown redis:redis /data
VOLUME /data
WORKDIR /data

COPY docker-entrypoint.sh /usr/local/bin/
RUN ln -s usr/local/bin/docker-entrypoint.sh /entrypoint.sh # backwards compat
ENTRYPOINT ["docker-entrypoint.sh"]

EXPOSE 6379
CMD [ "redis-server" ]
```

#### 3.2 版本
```
FROM debian:jessie

# add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
RUN groupadd -r redis && useradd -r -g redis redis

RUN apt-get update && apt-get install -y --no-install-recommends \
		ca-certificates \
		wget \
	&& rm -rf /var/lib/apt/lists/*

# grab gosu for easy step-down from root
ENV GOSU_VERSION 1.7
RUN set -x \
	&& wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \
	&& wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \
	&& export GNUPGHOME="$(mktemp -d)" \
	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
	&& gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
	&& rm -r "$GNUPGHOME" /usr/local/bin/gosu.asc \
	&& chmod +x /usr/local/bin/gosu \
	&& gosu nobody true

ENV REDIS_VERSION 3.2.3
ENV REDIS_DOWNLOAD_URL http://download.redis.io/releases/redis-3.2.3.tar.gz
ENV REDIS_DOWNLOAD_SHA1 92d6d93ef2efc91e595c8bf578bf72baff397507

# for redis-sentinel see: http://redis.io/topics/sentinel
RUN buildDeps='gcc libc6-dev make' \
	&& set -x \
	&& apt-get update && apt-get install -y $buildDeps --no-install-recommends \
	&& rm -rf /var/lib/apt/lists/* \
	&& wget -O redis.tar.gz "$REDIS_DOWNLOAD_URL" \
	&& echo "$REDIS_DOWNLOAD_SHA1 *redis.tar.gz" | sha1sum -c - \
	&& mkdir -p /usr/src/redis \
	&& tar -xzf redis.tar.gz -C /usr/src/redis --strip-components=1 \
	&& rm redis.tar.gz \
	&& make -C /usr/src/redis \
	&& make -C /usr/src/redis install \
	&& rm -r /usr/src/redis \
	&& apt-get purge -y --auto-remove $buildDeps

RUN mkdir /data && chown redis:redis /data
VOLUME /data
WORKDIR /data

COPY docker-entrypoint.sh /usr/local/bin/
ENTRYPOINT ["docker-entrypoint.sh"]

EXPOSE 6379
CMD [ "redis-server" ]
```