External DS repository

If you are using IDM with a DS repository, ForgeRock recommends using mTLS to authenticate to DS to better facilitate credential rotation.

IDM supports the following deployment scenarios with a DS repository:

Single external DS instance
Two DS instances in an active/passive configuration

IDM supports two replicated DS instances for backup/availabilty purposes only. Using multiple replicated DS instances as repositories (in a multimaster DS deployment) is not supported.

Configure a single external DS instance as a repository

If you have not yet installed DS, download it from the ForgeRock BackStage download site and extract the .zip archive.

Install DS according to the instructions in the DS Installation Guide:

If you are planning to use a generic object mapping for managed users, install DS with the idm-repo profile (see Install DS as an IDM Repository).
If you are planning to use an explicit object mapping for managed users, install DS with both the idm-repo and am-identity-store profiles (see Install DS as an IDM Repository and Install DS for AM Identities).

This example configures DS on the localhost, listening on the following ports:
- LDAP port: 31389
- Admin port: 34444
- LDAPS port: 31636

We’ve used these ports to avoid a port conflict with the default ports used in the LDAP samples. You can use any host and available ports in the setup. If you use a different host and ports, change the primaryLdapServers property in your repo.ds-external.json file accordingly.

Every DS deployment requires a deploymentId and a deploymentIdPassword to secure network connections. The deploymentId is a random string generated by DS software. The deploymentIdPassword is a secret string that you choose. It must be at least 8 characters long. The deploymentId and deploymentIdPassword automate key pair generation and signing without storing the CA private key. For more information, refer to Deployment IDs in the DS Security Guide.

In your IDM installation, remove the default DS repository configuration file (repo.ds.json ) from your project’s conf/ directory. For example:
```
cd /path/to/openidm/my-project/conf/
rm repo.ds.json
```
Copy the external DS repository configuration file (repo.ds-external.json ) to your project’s conf directory and rename it repo.ds.json :
```
cp /path/to/openidm/db/ds/conf/repo.ds-external.json my-project/conf/repo.ds.json
```

Enable IDM to trust the DS server certificate for your deployment.

For example, in the default case, where DS servers use TLS key pairs generated using a deploymentId and deploymentIdPassword, import the deploymentId-based CA certificate into the IDM truststore:

/path/to/opendj/bin/dskeymgr \
export-ca-cert \
--deploymentId your-deployment-ID \
--deploymentIdPassword password \
--outputFile ds-ca-cert.pem

keytool \
-importcert \
-alias ds-ca-cert \
-keystore /path/to/openidm/security/truststore \
-storepass:file /path/to/openidm/security/storepass \
-file ds-ca-cert.pem
Owner: CN=Deployment key, O=ForgeRock.com
Issuer: CN=Deployment key, O=ForgeRock.com
...
Trust this certificate? [no]: yes
Certificate was added to keystore

Adjust the connection settings from IDM to DS in the IDM repository configuration file, repo.ds.json:
- If your DS instance is not running on the localhost and listening for LDAP connections on port 31389, adjust the primaryLdapServers property in that file to match your DS setup.
- Make sure the password for the DS directory superuser (uid=admin) matches the DS root user password in the IDM configuration.
For details about the connection settings, refer to the information in Gateway LDAP Connections in the DS HTTP User Guide. (IDM shares these configuration settings with the DS REST to LDAP Gateway.)

Start IDM with the configuration for your project. For example:

/path/to/openidm/startup.sh -p my-project
Executing ./startup.sh...
Using OPENIDM_HOME:   /path/to/openidm
Using PROJECT_HOME:   /path/to/my-project
Using OPENIDM_OPTS:   -Xmx1024m -Xms1024m
Using LOGGING_CONFIG: -Djava.util.logging.config.file=/path/to/my-project/conf/logging.properties
-> OpenIDM version "7.4.1"
OpenIDM ready

(Optional) Verify that IDM successfully connects to DS:

grep 31389 /path/to/opendj/logs/ldap-access.audit.json | tail -n 1 | jq .
{
  "eventName": "DJ-LDAP",
  "client": {
    "ip": "127.0.0.1",
    "port": 35874
  },
  "server": {
    "ip": "127.0.0.1",
    "port": 31389
  },
  "request": {
    "protocol": "LDAP",
    "operation": "SEARCH",
    "connId": 1,
    "msgId": 232,
    "dn": "ou=triggers,ou=scheduler,dc=openidm,dc=forgerock,dc=com",
    "scope": "one",
    "filter": "(&(&(fr-idm-json:caseIgnoreJsonQueryMatch:=/state eq \"NORMAL\")(!(fr-idm-json:caseIgnoreJsonQueryMatch:=/nodeId pr)))(objectClass=uidObject)(objectClass=fr-idm-generic-obj)(objectClass=top))",
    "attrs": [
      "objectClass",
      "uid",
      "etag",
      "createTimestamp",
      "modifyTimestamp",
      "fr-idm-json"
    ]
  },
  "transactionId": "transaction-id",
  "response": {
    "status": "SUCCESSFUL",
    "statusCode": "0",
    "elapsedTime": 1,
    "elapsedTimeUnits": "MILLISECONDS",
    "nentries": 0
  },
  "timestamp": "timestamp",
  "_id": "id"
}

Configure two DS repositories in an active/passive deployment

With this configuration, IDM fails over to the secondary DS instance if the primary instance becomes unavailable. When the primary DS instance is restarted, that instance again becomes the target of all requests.

Download DS from the ForgeRock BackStage download site, and extract the .zip archive.

Install two DS servers, according to the instructions in the DS Installation Guide.

When you set up each server, specify a replicationPort and bootstrapReplicationServer so that both servers are installed as replicas. For information on these setup options, refer to setup in the DS Tools Reference.

If you are planning to use a generic object mapping for managed users, install DS with the idm-repo profile (see Install DS as an IDM Repository).
If you are planning to use an explicit object mapping for managed users, install DS with both the idm-repo and am-identity-store profiles (see Install DS as an IDM Repository and Install DS for AM Identities).

In your IDM installation, remove the default DS repository configuration file (repo.ds.json) from your project’s conf/ directory. For example:
```
cd /path/to/openidm/my-project/conf/
rm repo.ds.json
```
Copy the external DS repository configuration file (repo.ds-external.json) to your project’s conf directory and rename it repo.ds.json:
```
cp /path/to/openidm/db/ds/conf/repo.ds-external.json my-project/conf/repo.ds.json
```

Enable IDM to trust each DS server certificate for your deployment.

For example, in the default case, where DS servers use TLS key pairs generated using a deploymentId and deploymentIdPassword, import the deploymentId-based CA certificate for each server into the IDM truststore.

You will need to give the CA certificate of the second server a different alias.

/path/to/opendj/bin/dskeymgr \
export-ca-cert \
--deploymentId your-deployment-ID \
--deploymentIdPassword password \
--outputFile ds-ca-cert.pem keytool \
-importcert \
-alias ds-ca-cert \
-keystore /path/to/openidm/security/truststore \
-storepass:file /path/to/openidm/security/storepass \
-file ds-ca-cert.pem
Owner: CN=Deployment key, O=ForgeRock.com
Issuer: CN=Deployment key, O=ForgeRock.com
...
Trust this certificate? [no]: yes
Certificate was added to keystore

Specify the connection settings from IDM to the two DS servers in the ldapConnectionFactories property of the repository configuration file (repo.ds.json ).

This example assumes that the first DS server runs on the host ds1.example.com, and the second DS server runs on the host ds2.example.com:
```
"ldapConnectionFactories": {
    "bind": {
        "connectionSecurity": "startTLS",
        "heartBeatIntervalSeconds": 60,
        "heartBeatTimeoutMilliSeconds": 10000,
        "primaryLdapServers": [{ "hostname": "ds1.example.com", "port": 31389 }],
        "secondaryLdapServers": [{ "hostname": "ds2.example.com", "port": 31389 }]
}
```
Adjust the settings to match your DS server setup.

For details about the connection settings, refer to the information in Gateway LDAP Connections in the DS HTTP User Guide. (IDM shares these configuration settings with the DS REST to LDAP Gateway.)

Also in the repo.ds.json file, check the authentication settings:

"root": {
    "inheritFrom": "bind",
    "authentication": {
        "simple": { "bindDn": "uid=admin", "bindPassword": "str0ngAdm1nPa55word" }
    }
}

Make sure that the bindDn and bindPassword match the bind details of the DS superuser.

Start IDM, and verify that the connection to the primary DS server is successful.
(Optional) Shut down the primary DS server, and verify that the failover to the secondary server occurs, as expected.

Configure mTLS

After you have configured DS using one of the above methods, you can enable mTLS between DS and IDM. The following procedure uses a self-signed certificate—adjust it for an official certificate authority (CA) certificate.

Install and configure DS:
- Configure a single external DS instance as a repository
- Configure two DS repositories in an active/passive deployment
Create a self-signed, TLS key-pair with the subject DN: cn=IDM service account,dc=example,dc=com.

You can use any name for the cert alias, but you must update the sslCertAlias property in the repo.ds.json file to match the value you specify here.
```
keytool \
-genkey \
-alias client-cert \
-dname "cn=IDM service account,dc=example,dc=com" \
-storetype JCEKS \
-keystore /path/to/openidm/security/keystore.jceks \
-storepass changeit \
-keyalg RSA \
-keysize 2048 \
-validity 360
```

Export the certificate:

keytool \
-exportcert \
-alias client-cert \
-file idm-client.crt \
-storetype JCEKS \
-keystore /path/to/openidm/security/keystore.jceks \
-storepass changeit

Import the certificate into the DS keystore:

keytool \
-importcert \
-noprompt \
-alias client-cert \
-file idm-client.crt \
-storetype PKCS12 \
-keystore /path/to/ds/config/keystore \
-storepass $DEPLOYMENT_KEY

Use ldapmodify to map the uid=admin user in DS to the generated certificate:

/path/to/ds/bin/ldapmodify \
--hostname localhost \
--port 31389 \
--useStartTls \
--trustAll \
--bindDN uid=admin \
--bindPassword str0ngAdm1nPa55word << EOF
dn: uid=admin
changetype: modify
add: objectclass
objectclass: ds-certificate-user
-
replace: ds-certificate-subject-dn
ds-certificate-subject-dn: cn=IDM service account,dc=example,dc=com
EOF

Enable IDM to trust DS certificates:

/path/to/ds/bin/dskeymgr export-ca-cert \
--deploymentKey $DEPLOYMENT_KEY \
--deploymentKeyPassword $DEPLOYMENT_KEY_PASSWORD \
--outputFile ds-ca-cert.pem

keytool \
-importcert \
-alias ds-ca-cert \
-keystore /path/to/idm/security/truststore \
-storepass:file /path/to/idm/security/storepass \
-file ds-ca-cert.pem

Make the following changes to the repo.ds.json file:

...
    "ldapConnectionFactories" : {
        "bind" : {
            "connectionSecurity" : "ssl",
            "sslCertAlias": "client-cert", (1)
            ...
        "root" : {
            "inheritFrom" : "bind",
            "authentication": {
                "policy": "sasl-external"
            }
        }
    ...

1	Make sure to use the alias value you specified when creating the certificate.

IDM 7.4.1

External DS repository

Configure a single external DS instance as a repository

Configure two DS repositories in an active/passive deployment

Configure mTLS