Note
MongoDB creates a user that belongs to two groups,
which is a potential security risk.
This is fixed in Percona Server for MongoDB: user is included only in the mongod group.
To avoid problems with current MongoDB setups,
existing user group membership is not changed
when you migrate to Percona Server for MongoDB.
Instead, a new mongod user is created during installation,
and it belongs to the mongod group.
An in-place upgrade is done with existing data in the server. Generally speaking, this is stopping the server, removing the old packages, installing the new server and starting it with the same data files. While an in-place upgrade may not be suitable for high-complexity environments, it should work in most cases.
Warning
Before starting the upgrade process it is recommended to perform a full backup of your data.
The upgrade process depends on the distribution you are using:
Stop the mongod process:
$ service mongod stop
Check for installed packages:
$ dpkg -l | grep mongod
ii mongodb-org 3.0.6 amd64 MongoDB open source document-oriented database system (metapackage)
ii mongodb-org-mongos 3.0.6 amd64 MongoDB sharded cluster query router
ii mongodb-org-server 3.0.6 amd64 MongoDB database server
ii mongodb-org-shell 3.0.6 amd64 MongoDB shell client
ii mongodb-org-tools 3.0.6 amd64 MongoDB tools
Remove installed packages:
apt-get remove mongodb-org mongodb-org-mongos mongodb-org-server \
mongodb-org-shell mongodb-org-tools
Install Percona Server for MongoDB using apt.
Stop the mongod process:
$ service mongod stop
Check for installed packages:
$ rpm -qa | grep mongo
mongodb-org-3.0.6-1.el6.x86_64
mongodb-org-server-3.0.6-1.el6.x86_64
mongodb-org-shell-3.0.6-1.el6.x86_64
mongodb-org-mongos-3.0.6-1.el6.x86_64
mongodb-org-tools-3.0.6-1.el6.x86_64
Remove installed packages:
yum remove \
mongodb-org-3.0.6-1.el6.x86_64 mongodb-org-server-3.0.6-1.el6.x86_64 \
mongodb-org-shell-3.0.6-1.el6.x86_64 mongodb-org-mongos-3.0.6-1.el6.x86_64 \
mongodb-org-tools-3.0.6-1.el6.x86_64
Install Percona Server for MongoDB using yum.
Note
When you remove old packages,
your existing configuration file is saved
as /etc/mongod.conf.rpmsave.
If you want to use this configuration with the new version,
replace the default /etc/mongod.conf file.
For example, existing data may not be compatible
with the default WiredTiger storage engine.
For general inquiries, please send us your question and someone will contact you.
