前段时间，docker被墙了，想通过群晖直接升级或安装应用已经不行了，那么今天抄袭了一篇很方便的免翻墙便捷升级群晖docker应用的方法

1. 用到的工具是NxShell，通过SSH连接NAS

   换成Xshell了，NxShell不能复制，不好玩！

2. 输入sudo -i切换到root用户权限

3. 查看已安装的应用docker images

root@NAS:~# docker images
REPOSITORY                 TAG       IMAGE ID       CREATED         SIZE
neosmemo/memos             latest    7f4bea21310f   3 weeks ago     38.6MB
nextcloud                  latest    68294f5fded5   8 weeks ago     1GB
linuxserver/nextcloud      latest    6c494fe01e99   8 weeks ago     436MB
kodcloud/kodbox            latest    70c3adf323c8   2 months ago    483MB
jitesoft/tesseract-ocr     latest    d55342cfc11b   3 months ago    216MB
containrrr/watchtower      latest    f847e1adb570   4 months ago    14.6MB
altran1502/immich-server   latest    271392023569   4 months ago    506MB
vaultwarden/server         latest    241447ae76e9   5 months ago    200MB
photoprism/photoprism      latest    e6f531bbf1b0   7 months ago    1.5GB
viktorstrate/photoview     latest    acd3733a486e   10 months ago   1.28GB
bitwardenrs/server         latest    9e3bf5918c28   16 months ago   187MB
mmmz/trwebocr              latest    41baab05273a   17 months ago   1.29GB

4. 打开memos然后在右侧复制下载地址，得到

docker pull neosmemo/memos

5. 输入上面命令拉取镜像

root@NAS:~# docker pull neosmemo/memos
Using default tag: latest
latest: Pulling from neosmemo/memos
91d30c5bc195: Already exists 
43fa02c6b626: Pull complete 
58cd5a794880: Pull complete 
6eaa1a2422bd: Pull complete 
b93974286559: Pull complete 
Digest: sha256:875d028759b330c8df10a49eb8cce3d55725f34c2ffd95dca304081976805ccc
Status: Downloaded newer image for neosmemo/memos:latest
docker.io/neosmemo/memos:latest

6. docker images后我们可能会看到出现2个Memos镜像，其原因是拉取Docker镜像没有指定版本号的话，默认会拉取版本号（tag）为“latest”的镜像，老的镜像和新的镜像版本号都是latest，就会把老镜像版本号挤掉，变成none。我们只需要保留tag为latest的即可。

:~# docker images
REPOSITORY                 TAG       IMAGE ID       CREATED         SIZE
neosmemo/memos             latest    f930acc56434   3 weeks ago     38.7MB
neosmemo/memos             <none>    7f4bea21310f   3 weeks ago     38.6MB
nextcloud                  latest    68294f5fded5   8 weeks ago     1GB
linuxserver/nextcloud      latest    6c494fe01e99   8 weeks ago     436MB
kodcloud/kodbox            latest    70c3adf323c8   2 months ago    483MB
jitesoft/tesseract-ocr     latest    d55342cfc11b   3 months ago    216MB
containrrr/watchtower      latest    f847e1adb570   4 months ago    14.6MB
altran1502/immich-server   latest    271392023569   4 months ago    506MB
vaultwarden/server         latest    241447ae76e9   5 months ago    200MB
photoprism/photoprism      latest    e6f531bbf1b0   7 months ago    1.5GB
viktorstrate/photoview     latest    acd3733a486e   10 months ago   1.28GB
bitwardenrs/server         latest    9e3bf5918c28   16 months ago   187MB
mmmz/trwebocr              latest    41baab05273a   17 months ago   1.29GB

7. 群晖面板将memos镜像重命名为memos-backup618为新的容器腾出命名空间

8. 选中memos-backup618，点击设置 复制设置，名称重新改为memos，应用后，会自动复制一个新的容器并且复制所有数据过去。

9. 群晖面板删掉memos-backup618容器，删除旧的镜像文件即可

:~# docker rmi 7f4bea21310f
Untagged: neosmemo/memos@sha256:f9026edce05dfb65f95bfc0f5b9755d78868825264bf7cfb7832f70607d3c1ca
Deleted: sha256:7f4bea21310f28fd46581df818ec09975ad2d461bbaa8d4f73aa988a8d71d66e
Deleted: sha256:85b6f5f90e63337963d665ec67a7af3ccdaea40c280b47427148e49c86d08d52
Deleted: sha256:7cc93b8e3b1b77110990547119d1a2328e2a144d61ed2d84e6620cf09ef435ea
Deleted: sha256:e6c32109e9a50758ff7f38de074ba42743457b61e9fcf11e00764f5063768f1e
Deleted: sha256:62d22efbc1ec5e7de486acfb8efee8d82dfa4b2504869c3596baedc2a5dbbefd

• 参考文章
  文字：群晖Synology更新Docker容器方法
  视频:如何更新群晖Synology的Docker容器