shell脚本在容器云中搭建hadoop集群（四）

总结一下今天的学习过程

1，上午继续观看学习Python的数据库编程视屏，测试Django项目使用MariaDB数据库，由列表实现数据库表的映射，总结了区别

sqlite： 不需要继承models.Model
class student01():
id = models.IntegerField(primary_key=True)
name = models.CharField(max_length=50)
adress = models.CharField(max_length=50)
class Meta:
db_table='student01'

MariaDB：
class User(models.Model):
id = models.AutoField(max_length=11,db_column='UID',primary_key=True)
userName = models.CharField(max_length=255,db_column='username',blank = False)
passWord = models.CharField(max_length=255,db_column='password',blank = False)
cid = models.IntegerField(max_length=11,db_column='CID',blank = False)
class Meta:
db_table = 'user'
testDB.User.cid: (fields.W122) 'max_length' is ignored when used with IntegerField
设置为整形integer，长度不生效

2，中午以及下午还有晚上陆陆续续的师弟师妹来到实验室，感觉队伍又壮大了

3，今天师兄返校，倍感激动，请教了我之前做的使用shell脚本在docker中搭建hadoop的问题：关于sshd服务开启、hadoop容器之间相互免密登录的问题，实现了从节点的sshd以及其的ssh免密登录，感觉看到了曙光，期待明天能有更多的进展。

# !/bin/bash
# start sshd
/usr/sbin/sshd

hadoopsum=
hadoopPwd=

echo $hadoopsum
echo $hadoopPwd

function setupHadoopSalve(){

allhadoopip=''
for ((i=0;i<$hadoopsum;i++));
do
allhadoopip+="\n192.168.2.1$i hadoop$i";
done
allhadoopip+="\n"

echo $allhadoopip
echo "/etc/hosts......."
cat /etc/hosts

cp /etc/hosts /root/hosts.new
echo "/root/hosts.new........"
cat /root/hosts.new

for ss in `cat /root/hosts.new | grep hadoop | awk '{print $1}'`;
do sed -i '/'$ss'.*/d' /root/hosts.new;
done
echo -e "$(cat /root/hosts.new)" > /etc/hosts

cat /etc/hosts
echo -e $allhadoopip >> /etc/hosts

cd ~
rm -rf /root/.ssh
mkdir /root/.ssh

expect -c "set timeout -1;
spawn ssh-keygen -t rsa;
expect {
*(y/n)* {send -- y\r;exp_continue;}
*Enter* {send -- \r;exp_continue;}
}";

expect -c "set timeout -1;
spawn ssh-copy-id localhost;
expect {
*(yes/no)* {send -- yes\r;exp_continue;}
*assword:* {send -- $hadoopPwd\r;exp_continue;}
eof {exit 0;}
}";

for hostname in `hostname`;
do
echo $hostname
expect -c "set timeout -1;
spawn ssh-copy-id $hostname;
expect {
*(yes/no)* {send -- yes\r;exp_continue;}
*assword:* {send -- $hadoopPwd\r;exp_continue;}
eof {exit 0;}
}";
done
}
setupHadoopSalve

for ss in `ps -e | grep sshd | awk '{print $1}'`;
do
kill $ss;
done
/usr/sbin/sshd -D

激动的一天，明天加油！