Enabling Wire-level Security

Describes how to enable wire-level security.

Wire-level security encrypts data transmission between the nodes in your cluster.

When you set up a cluster, run the configure.sh script on each node that you want to add to the cluster.

Basic Procedure

To enable wire-level encryption for the cluster, follow these steps in order:

  1. If the cluster is running, shut it down.
  2. Delete the ssl_keystore, ssl_truststore, ssl_truststore.p12, and ssl_truststore.pem files on a machine where wire-level security is not enabled because the configure.sh script fails if you already have these files in the directory.
    Note: The ssl_keystore, ssl_truststore, ssl_truststore.p12, and ssl_truststore.pem files are generated during installation of the Web server even if you did not enable security.
    For example, to delete the files, run the following commands:
    cd /opt/mapr/conf
    /bin/rm -f ssl_keystore ssl_truststore ssl_truststore.p12 ssl_truststore.pem
    If you are re-running the script due to an invocation error from a previous run, the cldb.key and maprserverticket files may also have been created. Delete these files because the script fails if you already have these files in the directory. For example, run the following command to delete these files:
    cd /opt/mapr/conf
    /bin/rm -f cldb.key maprserverticket ssl_keystore ssl_truststore ssl_truststore.p12 ssl_truststore.pem
  3. Run the configure.sh script with the -secure -genkeys options on the first CLDB node in your cluster:
    /opt/mapr/server/configure.sh -secure -genkeys -Z <Zookeeper_node_list> -C <CLDB_node_list> -N <cluster_name>
    where both <Zookeeper_node_list> and <CLDB_node_list> have the form hostname[:port_no][,hostname[:port_no]...] and -N <cluster_name> specifies the cluster name.
    Important: You must run configure.sh -genkeys only once on one CLDB node, since the resulting files must be copied to other nodes.
    This command generates six files in the /opt/mapr/conf directory:
    • cldb.key
    • maprserverticket
    • ssl_keystore
    • ssl_truststore
    • ssl_truststore.p12
    • ssl_truststore.pem
  4. Copy the cldb.key file to any node that has the CLDB or Zookeeper service installed.
  5. Copy the maprserverticket, ssl_keystore, ssl_truststore, ssl_truststore.p12, and ssl_truststore.pem files to the /opt/mapr/conf directory of every node in the cluster.
  6. Verify that the files from the previous step are owned by the user that runs cluster services. This user is mapr by default. Also, the maprserverticket and ssl_keystore files must have their UNIX permission-mode bits set to 600, and the ssl_truststore, ssl_truststore.p12, and ssl_truststore.pem files must be readable to all users.
  7. Run configure.sh -secure on each existing node in the cluster using the same arguments as in Step 3 but without the -genkeys option.
    /opt/mapr/server/configure.sh -secure -Z <Zookeeper_node_list> -C <CLDB_node_list> -N <cluster_name>
    The -secure option indicates that wire-level security must be enabled on the node where the command is run.
    Important: You must also do this on any nodes that you add to the cluster in the future.
  8. Copy the ssl_truststore, ssl_truststore.p12, and ssl_truststore.pem files to any client nodes outside the cluster.
    Important: If you run configure.sh -secure on a node before you copy the necessary files to that node, the command fails.
  9. Log in as the mapr superuser using the maprlogin command: maprlogin password (in this command, password is literal text).
  10. Set the volume-level encryption flag (for the volumes whose traffic you wish to encrypt) using the volume create or volume modify command with the -wiresecurityenabled argument set to true.
  11. If clients will connect to multiple secure clusters, merge the ssl_truststore files with the /opt/mapr/server/manageSSLKeys.sh tool. See Setting Up the Client for more information on MapR clients.

Advanced Procedure

In certain situations, you may opt for variant of the basic procedure. Such situations include, but are not limited to the following:

  • You are running the script on a host that is configured without a domain name.
  • You have a cluster where all the machines do not have the same domain name.
  • You wish to import your own custom certificates instead of the self-signed certificates generated by the configure.sh utility.

Running on Hosts with no Configured Domain Name

When used without the -certdomain argument, the configure.sh script discovers the domain name of the node on which it is being executed using the hostname -d command and then creates a 100-year self-signed certificate using the PKCS#1 v1.5 with SHA-512 hash function (SHA512withRSA) with a wildcard certificate with the common name (CN) *.<domain>. For example, if hostname -d returns the domain name mycompany.com, then the CN of the certificate is *.mycompany.com. This certificate works for all machines within the mycompany.com domain and can therefore be copied to all cluster nodes as specified in Step 5 in the Basic Procedure.

Certificate generation fails if the host that you are running the script from is configured without a domain name. To fix this, modify your machine configuration so that hostname -d returns a non-empty string and then run the configure.sh script.

Alternatively, re-run the script with the -certdomain option as shown in Step 3 of the Basic Procedure:

/opt/mapr/server/configure.sh -secure -genkeys -certdomain <domain_name> -Z <Zookeeper_node_list> -C <CLDB_node_list> [ -N <cluster_name> ]

Securing Clusters with Multiple Domain Names

Generally, all machines within a cluster should belong to the same domain. In the unusual case where you have a cluster with different machines belonging to different domains, applications that perform hostname verification can fail if you run the configure.sh script (as described in Step 3 of the Basic Procedure) to generate a single-domain wildcard certificate. In this case, you must provide your own multi-domain wildcard certificate and import the custom certificate into the keystore as described in Importing a Certificate Authority Signed (CA Signed) SSL Certificate Into a MapR Cluster.