问题
I just did this myself (as a RockMongo export and import was corrupted) so just posting here.
Note this was for MongoDB verison 2.4.9 with corresponding versions of mongodump and mongorestore.
回答1:
Read the documentation relevant to your versions first, backup, make sure the solution below is relevant to your scenario etc.
http://docs.mongodb.org/v2.4/reference/program/mongodump/
http://docs.mongodb.org/v2.4/reference/program/mongorestore/
BEGIN 20/11/18 update
I just had to revisit these steps again, the following may be helpful to others:
01) To view all MongoDB environment variables, from local computer run:
oc exec mongodb-XX-XXXXX env
(gleaned from comments here)
02) To perform the dump, go to pod terminal in openshift console and enter this:
mongodump --host MONGODB_SERVICE_HOST:MONGODB_SERVICE_PORT --username admin --password "MONGODB_ADMIN_PASSWORD"
replacing the variable names with the actual values displayed from running the previous command.
I had to use the username admin rather than the environment variable value for MONGODB_USER.
03) If you want to zip the dump folder, do this from pod terminal in console:
tar czf my_dump.tar.gz dump
(gleaned from comments here)
04) To download the folder, from local PC terminal, do this:
oc rsync mongodb-20-XXXXX:/opt/app-root/src/dump /c/Users/Your-Directory
(gleaned from official docs and blog post here)
END 20/11/18 update
SSH In
rhc ssh [app-name]
cd app-root/repo/
Check what version of mongodump you have:
mongodump --version
mongodump version 2.4.9
mongodump
The command below will dump *ALL* databases.
mongodump --host $OPENSHIFT_MONGODB_DB_HOST:$OPENSHIFT_MONGODB_DB_PORT --username $OPENSHIFT_MONGODB_DB_USERNAME --password $OPENSHIFT_MONGODB_DB_PASSWORD
Zip Dump Folder
zip -r dump.zip dump
Exit SSH
exit
Download via SCP
(Replace the environment variable below with the actual value).
scp OPENSHIFT_APP_UUID@appname-username.rhcloud.com:~/app-root/repo/dump.zip /var/www/html
SSH back in and delete dump files
rhc ssh [app-name]
cd app-root/repo/
rm -r dump
rm -r dump.zip
In local command line, go to the directory where you downloaded the zip file:
cd /var/www/html
Unzip Dump Folder
unzip dump.zip -d dump
See what version of mongorestore you have and that everything is compatible:
mongorestore --version
mongorestore version 2.4.9
At this point, I deleted all my local *corresponding* databases in RockMongo so that the restore process would create them from scratch.
mongorestore
mongorestore dump
The default host and port used is localhost and 27017.
来源：https://stackoverflow.com/questions/27160237/how-to-mongodump-from-openshift-and-mongorestore-locally-on-mongodb-2-4-9