解决Docker容器时区及时间不同步问题

#定义环境变量
ENV  TIME_ZONE Asiz/Shanghai
#dockerfile增加命令
RUN \

```
RUN ...
#安装tzdata安装包
&& apk add --no-cache tzdata \  
#设置时区
&& echo "${TIME_ZONE}" > /etc/timezone \ 
&& ln -sf /usr/share/zoneinfo/${TIME_ZONE} /etc/localtime \

```
[root@docker ~]# timedatectl
      Local time: Tue 2016-12-13 21:52:13 EST
  Universal time: Wed 2016-12-14 02:52:13 UTC
        RTC time: Wed 2016-12-14 02:52:13
       Time zone: America/New_York (EST, -0500)  //默认为西五区
     NTP enabled: n/a
NTP synchronized: no
RTC in local TZ: no
      DST active: no
Last DST change: DST ended at
                  Sun 2016-11-06 01:59:59 EDT
                  Sun 2016-11-06 01:00:00 EST
Next DST change: DST begins (the clock jumps one hour forward) at
                  Sun 2017-03-12 01:59:59 EST
                  Sun 2017-03-12 03:00:00 EDT
#修改为东八区
[root@docker ~]# timedatectl set-timezone Asia/Shanghai
 Local time: Wed 2016-12-14 10:53:10 CST
  Universal time: Wed 2016-12-14 02:53:10 UTC
        RTC time: Wed 2016-12-14 02:53:10
       Time zone: Asia/Shanghai (CST, +0800)
     NTP enabled: n/a
NTP synchronized: no
RTC in local TZ: no
      DST active: n/a
[root@docker ~]# date
Wed Dec 14 10:53:49 CST 2016
#调整时间
[root@docker ~]# date -s "2016-12-13 21:54:20"
#时间同步，不执行则无法生效
[root@docker ~]# clock -w 
[root@docker ~]# timedatectl
      Local time: Tue 2016-12-13 22:59:44 CST
  Universal time: Tue 2016-12-13 14:59:44 UTC
        RTC time: Tue 2016-12-13 14:59:44
       Time zone: Asia/Shanghai (CST, +0800)
     NTP enabled: n/a
NTP synchronized: no
RTC in local TZ: no
      DST active: n/a
```

/ # date
Tue Dec 13 23:01:18 CST 2016