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# Overview This project is a GemFire 9.2+ SecurityManager implementation that allows privileges and passwords to be modified at runtime. All security administration tasks can be accomplished with gfsh. There is no need for a separate security admin. tool and security changes take effect immediately without the need to restart cluster members. User administration tasks are supported through a set of Functions that are installed by the SecurityManager.

The solution comes with two built-in users that are used for bootstrapping purposes. The built-in users are "gfadmin" and "gfpeer". "gfadmin" has all privileges including the ability to add new users and grant permissions. "gfpeer" is used by the cluster members to authenticate to each other. The built-in users cannot be removed but their passwords are set using properties.

Setup

Build gemfire-dynamic-security-n.n.jar

mvn package

To use gemfire-dynamic-security ensure that gemfire-dynamic-security-n.n.jar is on the class path and set the following properties on all cluster members.

security-manager=io.pivotal.pde.gemfire.dynamic.security.DynamicSecurityManager
security-peer-password=passw0rd
security-admin-password=opensesame
security-username=gfpeer
security-password=passw0rd

The security-peer-password and security-admin-password settings give the passwords for the two previously mentioned fixed accounts. Please use different passwords for your cluster!

The security-username and security-password settings control the credentials that each member presents when joining the cluster. The security-username setting must be "gfpeer" and the security-password setting must have the same value as the security-peer-password setting.

Lastly, the cluster must be initialized before the first use.

One Time Cluster Initialization Procedure

A persistent region called "_gemusers" must be created and because there is persistent data you will need to configure pdx persistence as well. A gfsh script, "init_cluster.gfsh" is supplied for the purpose.

At least one data node must be up to create a region via gfsh but pdx related configurations do not apply to data nodes that are already started. Therefore, the general procedure is for cluster initialization is:

  1. Start the cluster
  2. Review and edit the init script
  3. Connect to the cluster and run the script. The script will automatically shut down all data nodes when it is done.
  4. Start the cluster (it is now ready for use)

The script contains locations for disks stores, don't forget to update these to appropriate values before running it.

The script contents are below.

deploy --jar=target/gemfire-dynamic-security-1.1.1.jar  
create disk-store --name=pdx-disk-store --dir=EDIT_THIS --allow-force-compaction=true
create disk-store --name=security-disk-store --dir=EDIT_THIS --allow-force-compaction=true
echo --string="waiting for disk store creation"
sleep --time=10
create region --name=_gemusers --type=REPLICATE_PERSISTENT --disk-store=security-disk-store
configure pdx --read-serialized=true --disk-store=pdx-disk-store
shutdown

The script can be run with a command similar to the following (it will need to be run as "gfadmin").

gfsh -e "connect --locator=loctorhost[10334] --user=gfadmin --password=opensesame" -e "run --file=init_cluster.gfsh"

This procedure only needs to be done the first time the cluster is started. Thereafter, assuming the cluster configuration service has not been disabled, the configuration changes will stick.

Once the cluster is started, you can use the provided admin. functions to create additional users and control who can do what. The details are provided below.

Security Model

The implementation has a built in user called "gfadmin" who will have all privileges. The "gfadmin" user cannot be delete and it's privileges can't be changed.
The password cannot be changed except by setting the property and performing a restart.
However, additional security administrators can be created.

Similarly, the cluster members authenticate each other using a fixed user, "gfpeer" which has only the minimum permissions required to join the cluster. The "gfpeer" password is set with the "security-peer-password" setting and cannot be changed.

The security model supports the following roles. Each role has all the permissions of all of the earlier roles except for those of PEER.

Role Description
PEER Has the minimum credentials to join the cluster as a peer. (i.e. CLUSTER:MANAGE )
MONITOR Can run Pulse but cannot view data.
READER Can read all data other than the security data in the _gemusers region.
WRITER Can modify or delete data other than the security data in the _gemusers region.
ADMIN Create regions, disk stores, indices and perform all cluster management tasks not related to security.
SECADMIN Manage users, their passwords and roles

Security Administration Procedures

Security administration is provided by several built-in Functions.

The examples below illustrate how to use the admin Functions. Note that all functions should be invoked with the --member option. The command will run on the specified member but the user and privilege information will be propagated to all members.

# add a new user with the WRITER role
# if the user exists, both the password and the role will be set
gfsh> execute function --id=add_user --arguments=myuser,mypass,WRITER --member=datanode2


# add a new user or reset an existing user's password (does not affect privileges)
# new users created this way have the MONITOR role
gfsh> execute function --id=set_password --arguments=myuser,mypass  --member=datanode1

#set a users privileges (must be one of PEER, MONITOR, READER, WRITER, ADMIN or SECADMIN)
gfsh> execute function --id=set_role --arguments=myuser,WRITER  --member=datanode1

# remove a user
gfsh> execute function --id=remove_user --arguments=myuser  --member=datanode1

# to list users, use the following query
gfsh> query --query="select key,value.toString from /_gemusers.entries"

Security Notes

  • User passwords are hashed together with a random salt. Only the salt and the hash are stored, not the password. When setting the password via a Function call the password will be sent to the server in clear text unless the connection is SSL enabled. Also, the password will potentially be in the gfsh history.
    This could be overcome by calling the Function via REST API.