接上篇： http://blog.51cto.com/bobo365/2125138
48、容器导出导入：
docker import 容器ID > xxx.tar
cat xxx.tar | docker import - xxx:v1.0
```
镜像导出导入：
```
docker save xxx:v1.0 > yyyy.tar.gz
docker load < yyyy.tar.gz
```
# 49、docker
## 卸载：
yum remove docker
docker-common
docker-selinux
docker-engine
## 安装依赖：
yum -y install yum-utils device-mapper-persistent-data lvm2
## 设置源：
yum-config-manager
--add-repo
https://mirrors.ustc.edu.cn/docker-ce/linux/centos/docker-ce.repo
## 安装：
yum makecache fast yum -y install docker-ce
## docker-enter:
.bashrc_docker
#Some useful commands to use docker. #Author: yeasy@github #Created:2014-09-25
alias docker-pid="sudo docker inspect --format '{{.State.Pid}}'" alias docker-ip="sudo docker inspect --format '{{ .NetworkSettings.IPAddress }}'"
#the implementation refs from https://github.com/jpetazzo/nsenter/blob/master/docker-enter function docker-enter() { #if [ -e $(dirname "$0")/nsenter ]; then #Change for centos bash running if [ -e $(dirname '$0')/nsenter ]; then # with boot2docker, nsenter is not in the PATH but it is in the same folder NSENTER=$(dirname "$0")/nsenter else # if nsenter has already been installed with path notified, here will be clarified NSENTER=$(which nsenter) #NSENTER=nsenter fi [ -z "$NSENTER" ] && echo "WARN Cannot find nsenter" && return
if [ -z "$1" ]; then
echo "Usage: `basename "$0"` CONTAINER [COMMAND [ARG]...]"
echo ""
echo "Enters the Docker CONTAINER and executes the specified COMMAND."
echo "If COMMAND is not specified, runs an interactive shell in CONTAINER."
else
PID=$(sudo docker inspect --format "{{.State.Pid}}" "$1")
if [ -z "$PID" ]; then
echo "WARN Cannot find the given container"
return
fi
shift
OPTS="--target $PID --mount --uts --ipc --net --pid"
if [ -z "$1" ]; then
# No command given.
# Use su to clear all host environment variables except for TERM,
# initialize the environment variables HOME, SHELL, USER, LOGNAME, PATH,
# and start a login shell.
#sudo $NSENTER "$OPTS" su - root
sudo $NSENTER --target $PID --mount --uts --ipc --net --pid su - root
else
# Use env to clear all host environment variables.
sudo $NSENTER --target $PID --mount --uts --ipc --net --pid env -i $@
fi
fi
}
echo "[ -f ~/.bashrc_docker ] && . ~/.bashrc_docker " >> ~/.bashrc; source ~/.bashrc
# 50、tomcat启动非常慢，要花5~6分钟
[http://blog.csdn.net/sxhong/article/details/62889003](http://blog.csdn.net/sxhong/article/details/62889003)
有两种解决办法：
## 1）在Tomcat环境中解决
可以通过配置JRE使用非阻塞的Entropy Source。
在catalina.sh中加入这么一行：-Djava.security.egd=file:/dev/./urandom 即可。
加入后再启动Tomcat，整个启动耗时下降到Server startup in 2912 ms。
## 2）在JVM环境中解决
打开$JAVA_PATH/jre/lib/security/java.security这个文件，找到下面的内容：
securerandom.source=file:/dev/urandom
替换成
securerandom.source=file:/dev/./urandom
# 51、定时释放mem脚本
[root@master script]# vim freemem.sh
#!/bin/bash
used=free -m | awk 'NR==2' | awk '{print $3}'
free=free -m | awk 'NR==2' | awk '{print $4}'
echo "===========================" >> /var/log/mem.log date >> /var/log/mem.log echo "Memory usage | [Use：${used}MB][Free：${free}MB]" >> /var/log/mem.log
if [ $free -le 6350 ] ; then sync && echo 1 > /proc/sys/vm/drop_caches sync && echo 2 > /proc/sys/vm/drop_caches sync && echo 3 > /proc/sys/vm/drop_caches echo "bobo365" >> /var/log/mem.log else echo "Not required" >> /var/log/mem.log fi
*/30 * * * * /bin/bash /home/script/freemem.sh &>/dev/null
# 52、activemq
[http://blog.csdn.net/xiaoxing598/article/details/51604999](http://blog.csdn.net/xiaoxing598/article/details/51604999)
[http://activemq.apache.org/activemq-5153-release.html](http://activemq.apache.org/activemq-5153-release.html)
tar xf xxx -C /usr/local cd /usr/local/xxx/bin ./activemq start
vim conf/jetty-realm.properties #将里面的内容清空，重新添加一行 admin: Admin!123, admin
vim conf/jetty.xml #修改第30行变成如下 <property name="roles" value="admin" />
vim conf/activemq.xml 保留openwire stomp
# 53、MFS
curl "http://ppa.moosefs.com/RPM-GPG-KEY-MooseFS" > /etc/pki/rpm-gpg/RPM-GPG-KEY-MooseFS curl "http://ppa.moosefs.com/MooseFS-3-el7.repo" > /etc/yum.repos.d/MooseFS.repo yum install moosefs-master moosefs-cgi moosefs-cgiserv moosefs-cli yum install moosefs-chunkserver yum install moosefs-metalogger yum install moosefs-client
cd /etc/mfs/
[root@bobo365 mfs]# egrep -v "#|^$" mfsexports.cfg
10.150.27.0/24 / rw,alldirs,mapall=mfs:mfs,password=111111
-
. rw
[root@bobo365 mfs]# egrep -v "#|^$" mfshdd.cfg
/mfsdata
[root@bobo365 mfs]# egrep -v "#|^$" mfsmetalogger.cfg
ASTER_HOST = 10.150.27.113 MASTER_PORT = 9419
[root@bobo365 mfs]# egrep -v "#|^$" mfschunkserver.cfg
MASTER_HOST = mfsmaster MASTER_PORT = 9420 AUTH_CODE = 111111
mkdir /mfsdata chown -R mfs.mfs /mfsdata/
客户端：
mkdir /mnt/mfs chown -R mfs.mfs /mnt/mfs/
mfsmount /mnt/mfs -H 10.150.27.113 -o mfspassword=111111
[root@bobo365 mfs]# more /etc/hosts 10.150.27.113 bobo365 mfsmaster
http://10.150.27.113:9425
1、启动master
2、启动所有chunkserver
3、启动metalogger
4、挂载客户端
停止反序。
systemctl start moosefs-master.service systemctl start moosefs-chunkserver.service systemctl start moosefs-cgiserv.service systemctl start moosefs-metalogger.service
systemctl status moosefs-master.service systemctl status moosefs-chunkserver.service systemctl status moosefs-cgiserv.service systemctl status moosefs-metalogger.service
systemctl enable moosefs-master.service systemctl enable moosefs-chunkserver.service systemctl enable moosefs-cgiserv.service systemctl enable moosefs-metalogger.service
more /etc/rc.local mfsmount /mnt/mfs -H 10.150.27.113 -o mfspassword=111111
