Php 链接到Docker memcached容器

我已经用Docker做了几天的实验，并逐渐喜欢上了它。然而，有一些事情我仍然无法理解。以下是我到目前为止的情况

创建一个占地面积小的Ubuntu 14.04图像

//I got this from a post on this forum 
#!/bin/bash

docker rm ubuntu-essential-multilayer 2>/dev/null
set -ve
docker build -t textlab/ubuntu-essential-multilayer - <<'EOF'
FROM ubuntu:14.04
# Make an exception for apt: it gets deselected, even though it probably shouldn't.
RUN dpkg --clear-selections && echo apt install |dpkg --set-selections && \
SUDO_FORCE_REMOVE=yes DEBIAN_FRONTEND=noninteractive apt-get --purge -y dselect-upgrade && \
dpkg-query -Wf '${db:Status-Abbrev}\t${binary:Package}\n' |grep '^.i' |awk -F'\t' '{print $2 " install"}' |dpkg --set-selections && \
rm -r /var/cache/apt /var/lib/apt/lists
EOF
TMP_FILE="`mktemp -t ubuntu-essential-XXXXXXX.tar.gz`"
docker run --rm -i textlab/ubuntu-essential-multilayer tar zpc --exclude=/etc/hostname \
--exclude=/etc/resolv.conf --exclude=/etc/hosts --one-file-system / >"$TMP_FILE"
docker rmi textlab/ubuntu-essential-multilayer
docker import - textlab/ubuntu-essential-nocmd <"$TMP_FILE"
docker build -t textlab/ubuntu-essential - <<'EOF'
FROM textlab/ubuntu-essential-nocmd
CMD ["/bin/bash"]
EOF
docker rmi textlab/ubuntu-essential-nocmd
rm -f "$TMP_FILE"

FROM textlab/ubuntu-essential


RUN apt-get update && apt-get -y install apache2 && apt-get clean
RUN a2enmod ssl

ENV APACHE_RUN_USER www-data
ENV APACHE_RUN_GROUP www-data
ENV APACHE_LOG_DIR /var/log/apache2

EXPOSE 80
EXPOSE 443

CMD ["/usr/sbin/apache2ctl", "-D", "FOREGROUND"]

docker build -t droidos/apache .

FROM textlab/ubuntu-essential
# Install packages
RUN DEBIAN_FRONTEND=noninteractive apt-get update
RUN DEBIAN_FRONTEND=noninteractive apt-get -y install memcached

# memcached public variable 

EXPOSE 11211

CMD ["/usr/bin/memcached", "-u", "memcache", "-v"]

docker build -t droidos/memcached .

<?php
error_reporting(E_ALL); 
header('Content-type:text/plain');
$mc = new Memcached(); 
$mc->addServer("localhost", 11211); 

$flag = $mc->add('name','droidos'); 
echo ($flag)?'y':'n';
echo $mc->getResultCode();
?>

为PHP5创建Dockerfile

FROM droidos/apache

RUN apt-get update && apt-get -y --reinstall install php5 php5-redis php5-memcached php5-curl libssh2-php php5-mysqlnd php5-mcrypt && apt-get clean
RUN php5enmod mcrypt

ENV APACHE_RUN_USER www-data
ENV APACHE_RUN_GROUP www-data
ENV APACHE_LOG_DIR /var/log/apache2

EXPOSE 80
EXPOSE 443

CMD ["/usr/sbin/apache2ctl", "-D", "FOREGROUND"]

docker build -t droidos/php5 .

为memcached创建Dockerfile并生成映像

//I got this from a post on this forum 
#!/bin/bash

docker rm ubuntu-essential-multilayer 2>/dev/null
set -ve
docker build -t textlab/ubuntu-essential-multilayer - <<'EOF'
FROM ubuntu:14.04
# Make an exception for apt: it gets deselected, even though it probably shouldn't.
RUN dpkg --clear-selections && echo apt install |dpkg --set-selections && \
SUDO_FORCE_REMOVE=yes DEBIAN_FRONTEND=noninteractive apt-get --purge -y dselect-upgrade && \
dpkg-query -Wf '${db:Status-Abbrev}\t${binary:Package}\n' |grep '^.i' |awk -F'\t' '{print $2 " install"}' |dpkg --set-selections && \
rm -r /var/cache/apt /var/lib/apt/lists
EOF
TMP_FILE="`mktemp -t ubuntu-essential-XXXXXXX.tar.gz`"
docker run --rm -i textlab/ubuntu-essential-multilayer tar zpc --exclude=/etc/hostname \
--exclude=/etc/resolv.conf --exclude=/etc/hosts --one-file-system / >"$TMP_FILE"
docker rmi textlab/ubuntu-essential-multilayer
docker import - textlab/ubuntu-essential-nocmd <"$TMP_FILE"
docker build -t textlab/ubuntu-essential - <<'EOF'
FROM textlab/ubuntu-essential-nocmd
CMD ["/bin/bash"]
EOF
docker rmi textlab/ubuntu-essential-nocmd
rm -f "$TMP_FILE"

FROM textlab/ubuntu-essential


RUN apt-get update && apt-get -y install apache2 && apt-get clean
RUN a2enmod ssl

ENV APACHE_RUN_USER www-data
ENV APACHE_RUN_GROUP www-data
ENV APACHE_LOG_DIR /var/log/apache2

EXPOSE 80
EXPOSE 443

CMD ["/usr/sbin/apache2ctl", "-D", "FOREGROUND"]

docker build -t droidos/apache .

FROM textlab/ubuntu-essential
# Install packages
RUN DEBIAN_FRONTEND=noninteractive apt-get update
RUN DEBIAN_FRONTEND=noninteractive apt-get -y install memcached

# memcached public variable 

EXPOSE 11211

CMD ["/usr/bin/memcached", "-u", "memcache", "-v"]

docker build -t droidos/memcached .

<?php
error_reporting(E_ALL); 
header('Content-type:text/plain');
$mc = new Memcached(); 
$mc->addServer("localhost", 11211); 

$flag = $mc->add('name','droidos'); 
echo ($flag)?'y':'n';
echo $mc->getResultCode();
?>

使用memcached启动docker容器

docker run -d -P --name memcached droidos/memcached

使用apache启动docker容器，并将其链接到先前创建的memcached容器

docker run -d --name apache --link memcached:memcached -v /var/droidos/site:/var/www/html -v /var/droidos/logs:/var/log/apache2 -p 8080:80 droidos/php5 

浏览example.com:8080

一切似乎都很好

在/var/droidos/site中创建memcached测试脚本

//I got this from a post on this forum 
#!/bin/bash

docker rm ubuntu-essential-multilayer 2>/dev/null
set -ve
docker build -t textlab/ubuntu-essential-multilayer - <<'EOF'
FROM ubuntu:14.04
# Make an exception for apt: it gets deselected, even though it probably shouldn't.
RUN dpkg --clear-selections && echo apt install |dpkg --set-selections && \
SUDO_FORCE_REMOVE=yes DEBIAN_FRONTEND=noninteractive apt-get --purge -y dselect-upgrade && \
dpkg-query -Wf '${db:Status-Abbrev}\t${binary:Package}\n' |grep '^.i' |awk -F'\t' '{print $2 " install"}' |dpkg --set-selections && \
rm -r /var/cache/apt /var/lib/apt/lists
EOF
TMP_FILE="`mktemp -t ubuntu-essential-XXXXXXX.tar.gz`"
docker run --rm -i textlab/ubuntu-essential-multilayer tar zpc --exclude=/etc/hostname \
--exclude=/etc/resolv.conf --exclude=/etc/hosts --one-file-system / >"$TMP_FILE"
docker rmi textlab/ubuntu-essential-multilayer
docker import - textlab/ubuntu-essential-nocmd <"$TMP_FILE"
docker build -t textlab/ubuntu-essential - <<'EOF'
FROM textlab/ubuntu-essential-nocmd
CMD ["/bin/bash"]
EOF
docker rmi textlab/ubuntu-essential-nocmd
rm -f "$TMP_FILE"

FROM textlab/ubuntu-essential


RUN apt-get update && apt-get -y install apache2 && apt-get clean
RUN a2enmod ssl

ENV APACHE_RUN_USER www-data
ENV APACHE_RUN_GROUP www-data
ENV APACHE_LOG_DIR /var/log/apache2

EXPOSE 80
EXPOSE 443

CMD ["/usr/sbin/apache2ctl", "-D", "FOREGROUND"]

docker build -t droidos/apache .

FROM textlab/ubuntu-essential
# Install packages
RUN DEBIAN_FRONTEND=noninteractive apt-get update
RUN DEBIAN_FRONTEND=noninteractive apt-get -y install memcached

# memcached public variable 

EXPOSE 11211

CMD ["/usr/bin/memcached", "-u", "memcache", "-v"]

docker build -t droidos/memcached .

<?php
error_reporting(E_ALL); 
header('Content-type:text/plain');
$mc = new Memcached(); 
$mc->addServer("localhost", 11211); 

$flag = $mc->add('name','droidos'); 
echo ($flag)?'y':'n';
echo $mc->getResultCode();
?>

指示服务实际上未在运行。所以我开始了

service memcached start

---

验证它是否已启动，然后再次运行上面的脚本。没有乐趣-我仍然收到n47回复，而不是我希望看到的y0。很明显，我在这里遗漏了一步。我非常感谢任何能够告诉我这可能是什么的人。

我认为它失败了，因为您正试图从连接到apache容器本地主机的apache容器访问memcached，而memcached容器可以在不同的IP地址上被apache容器访问

我认为这句话是错误的：

$mc->addServer("localhost", 11211);

链接容器时，Docker会将源容器的主机条目添加到

/etc/hosts

文件中（请参阅）

因此，您应该能够使用以下PHP命令从apache容器连接到memcached容器：

$mc->addServer("memcached", 11211);

---

如果它不工作，请检查是否可以从memcached容器本身连接到memcached服务。

您不希望将其作为容器内的服务运行。只要开始这个过程，然后根据需要在外部选择一些东西来启动和停止容器。@Bryan我必须承认-你的评论对我来说意义不大。恐怕我还是个码头新手。我认为整个Docker的理念是连接多个容器，每个容器处理一个特定的任务。一个容器用于Apache，一个容器用于dB，一个容器用于用户数据。。。全部连接在一起？是的，每个容器一件。但不要使用

服务启动运行它，只要运行它就行了。很好！非常感谢你！我搜索了几乎所有关于这件事的信息，这在我的案件中起了作用+1.非常感谢。