[#2116] remove cql code

17 files changed, 30 insertions, 218 deletions

diff --git a/doc/examples/kea6/advanced.json b/doc/examples/kea6/advanced.json
index c8b48c1b31..3ea1c613ad 100644
--- a/doc/examples/kea6/advanced.json
+++ b/doc/examples/kea6/advanced.json
@@ -25,7 +25,7 @@
 
     // We need to specify the database used to store leases. As of
     // September 2016, four database backends are supported: MySQL,
-    // PostgreSQL, Cassandra, and the in-memory database, Memfile.
+    // PostgreSQL and the in-memory database, Memfile.
     // We will use memfile  because it doesn't require any prior set up.
     "lease-database": {
         "type": "memfile",
diff --git a/doc/examples/kea6/all-keys-netconf.json b/doc/examples/kea6/all-keys-netconf.json
index f55512cbce..4eb5d55e20 100644
--- a/doc/examples/kea6/all-keys-netconf.json
+++ b/doc/examples/kea6/all-keys-netconf.json
@@ -269,7 +269,7 @@
                 // Port on which the database is available.
                 "port": 3306,
 
-                // Type of the database, e.g. "mysql", "postgresql", "cql".
+                // Type of the database, e.g. "mysql", "postgresql".
                 "type": "mysql",
 
                 // User name to be used to access the database.
@@ -291,41 +291,25 @@
                 // Port on which the database is available.
                 "port": 5432,
 
-                // Type of the database, e.g. "mysql", "postgresql", "cql".
+                // Type of the database, e.g. "mysql", "postgresql".
                 "type": "postgresql",
 
                 // User name to be used to access the database.
                 "user": "kea"
             },
             {
-                // Name of the database to connect to.
-                "keyspace": "kea",
-
-                // Host on which the database resides.
-                "contact-points": "127.0.0.1",
-
                 // Database password.
                 "password": "kea",
 
                 // Port on which the database is available.
                 "port": 9042,
 
-                // Type of the database, e.g. "mysql", "postgresql", "cql".
-                "type": "cql",
+                // Type of the database, e.g. "mysql", "postgresql".
+                "type": "mysql",
 
                 // User name to be used to access the database.
                 "user": "kea",
 
-                // Consistency level for all queries.
-                // Supported values: any, one, two, three, quorum, all,
-                // local-quorum, each-quorum, serial, local-serial, local-one.
-                "consistency": "quorum",
-
-                // Serial consistency level for all queries.
-                // Supported values: any, one, two, three, quorum, all,
-                // local-quorum, each-quorum, serial, local-serial, local-one.
-                "serial-consistency": "serial",
-
                 // Connection reconnect wait time.
                 // This parameter governs how long Kea waits before attempting
                 // to reconnect. Expressed in milliseconds. The default is 2000 [ms]
@@ -341,16 +325,7 @@
                 "on-fail": "stop-retry-exit",
 
                 // Connection connect timeout.
-                "connect-timeout": 100,
-
-                // Connection request timeout.
-                "request-timeout": 100,
-
-                // Connection tcp keepalive.
-                "tcp-keepalive": 100,
-
-                // Connection tcp nodelay.
-                "tcp-nodelay": true
+                "connect-timeout": 100
             }
         ],
 
@@ -425,8 +400,8 @@
             // because non stored leases will be lost upon Kea server restart.
             "persist": true,
 
-            // Lease database backend type, i.e. "memfile", "mysql",
-            // "postgresql" or "cql".
+            // Lease database backend type, i.e. "memfile", "mysql", or
+            // "postgresql".
             "type": "memfile"
         },
 
@@ -1011,7 +986,7 @@
                     // Name of the database to connect to.
                     "name": "config",
 
-                    // Type of the database, e.g. "mysql", "postgresql", "cql".
+                    // Type of the database, e.g. "mysql", "postgresql".
                     "type": "mysql"
                 }
             ],
diff --git a/doc/examples/kea6/all-keys.json b/doc/examples/kea6/all-keys.json
index f05126e346..09b750af9c 100644
--- a/doc/examples/kea6/all-keys.json
+++ b/doc/examples/kea6/all-keys.json
@@ -269,7 +269,7 @@
                 // Port on which the database is available.
                 "port": 3306,
 
-                // Type of the database, e.g. "mysql", "postgresql", "cql".
+                // Type of the database, e.g. "mysql", "postgresql".
                 "type": "mysql",
 
                 // User name to be used to access the database.
@@ -305,41 +305,25 @@
                 // Port on which the database is available.
                 "port": 5432,
 
-                // Type of the database, e.g. "mysql", "postgresql", "cql".
+                // Type of the database, e.g. "mysql", "postgresql".
                 "type": "postgresql",
 
                 // User name to be used to access the database.
                 "user": "kea"
             },
             {
-                // Name of the database to connect to.
-                "keyspace": "kea",
-
-                // Host on which the database resides.
-                "contact-points": "127.0.0.1",
-
                 // Database password.
                 "password": "kea",
 
                 // Port on which the database is available.
                 "port": 9042,
 
-                // Type of the database, e.g. "mysql", "postgresql", "cql".
-                "type": "cql",
+                // Type of the database, e.g. "mysql", "postgresql".
+                "type": "mysql",
 
                 // User name to be used to access the database.
                 "user": "kea",
 
-                // Consistency level for all queries.
-                // Supported values: any, one, two, three, quorum, all,
-                // local-quorum, each-quorum, serial, local-serial, local-one.
-                "consistency": "quorum",
-
-                // Serial consistency level for all queries.
-                // Supported values: any, one, two, three, quorum, all,
-                // local-quorum, each-quorum, serial, local-serial, local-one.
-                "serial-consistency": "serial",
-
                 // Connection reconnect wait time.
                 // This parameter governs how long Kea waits before attempting
                 // to reconnect. Expressed in milliseconds. The default is 2000 [ms]
@@ -355,16 +339,7 @@
                 "on-fail": "stop-retry-exit",
 
                 // Connection connect timeout.
-                "connect-timeout": 100,
-
-                // Connection request timeout.
-                "request-timeout": 100,
-
-                // Connection tcp keepalive.
-                "tcp-keepalive": 100,
-
-                // Connection tcp nodelay.
-                "tcp-nodelay": true
+                "connect-timeout": 100
             }
         ],
 
@@ -454,8 +429,8 @@
             // because non stored leases will be lost upon Kea server restart.
             "persist": true,
 
-            // Lease database backend type, i.e. "memfile", "mysql",
-            // "postgresql" or "cql".
+            // Lease database backend type, i.e. "memfile", "mysql" or
+            // "postgresql".
             "type": "memfile"
         },
 
@@ -1040,7 +1015,7 @@
                     // Name of the database to connect to.
                     "name": "config",
 
-                    // Type of the database, e.g. "mysql", "postgresql", "cql".
+                    // Type of the database, e.g. "mysql", "postgresql".
                     "type": "mysql"
                 }
             ],
diff --git a/doc/examples/kea6/backends.json b/doc/examples/kea6/backends.json
index 9a3b5224df..148a5834a4 100644
--- a/doc/examples/kea6/backends.json
+++ b/doc/examples/kea6/backends.json
@@ -4,7 +4,6 @@
 // - memfile
 // - MySQL
 // - PostgreSQL
-// - CQL (Cassandra) backend
 
 { "Dhcp6":
 
@@ -66,21 +65,6 @@
 //      "connect-timeout": 3
 //  },
 
-// 4. CQL (Cassandra) backend. Leases will be stored in Cassandra
-// database. Make sure it is up, running and properly initialized. See
-// kea-admin documentation for details on how to initialize the
-// database. The only strictly required parameters are type, keyspace
-// and contact-points. At least one contact point must be specified, but
-// more than one is required for redundancy. Make sure you specify the
-// contact points without spaces. Kea must be compiled with --with-cql
-// option to use this backend.
-//  "lease-database": {
-//      "type": "cql",
-//      "keyspace": "keatest",
-//      "contact-points": "192.0.2.1,192.0.2.2,192.0.2.3",
-//      "port": 9042
-//  },
-
 // Addresses will be assigned with preferred and valid lifetimes
 // being 3000 and 4000, respectively. Client is told to start
 // renewing after 1000 seconds. If the server does not respond
diff --git a/doc/examples/kea6/cassandra.json b/doc/examples/kea6/cassandra.json
deleted file mode 100644
index 071b16583f..0000000000
--- a/doc/examples/kea6/cassandra.json
+++ /dev/null
@@ -1,122 +0,0 @@
-// This is an example configuration file for the DHCPv6 server in Kea.
-// It is a basic scenario with one IPv6 subnet configured. It demonstrates
-// how to configure Kea to use CQL (Cassandra) backend.
-
-{ "Dhcp6":
-
-{
-// Kea is told to listen on ethX interface only.
-  "interfaces-config": {
-    "interfaces": [ "ethX" ]
-  },
-
-// CQL (Cassandra) backend. Leases will be stored in Cassandra database. Make
-// sure it is up, running and properly initialized. See kea-admin documentation
-// for details on how to initialize the database. The only strictly required
-// parameters are type, keyspace and contact-points. At least one contact point
-// must be specified, but more than one is required for redundancy. Make sure
-// you specify the contact points without spaces. Kea must be compiled with
-// --with-cql option to use this backend.
-  "lease-database": {
-      "type": "cql",
-      "keyspace": "keatest",
-      "contact-points": "192.0.2.1,192.0.2.2,192.0.2.3",
-      "port": 9042,
-
-      // Cassandra supports many additonal parameters that are typically
-      // not needed, but may be used to tweak your deployment.
-
-      // This parameter governs how long Kea waits before attempting
-      // to reconnect. Expressed in milliseconds. The default is 2000 [ms].
-      "reconnect-wait-time": 2000,
-
-      // This parameter sets the timeout for connecting to a node. Expressed
-      // in milliseconds. The default is 5000 [ms].
-      "connect-timeout": 5000,
-
-      // This parameter sets the timeout for waiting for a response
-      // from a node. Expressed in milliseconds. The default is 12000 [ms].
-      "request-timeout": 12000,
-
-      // This parameter governs the TCP keep-alive mechanism. Expressed
-      // in seconds of delay. The default is disabled. In this example it is
-      // set to 20 minutes.
-      "tcp-keepalive": 1200,
-
-      // This parameter enables/disables Nagle's algorithm on connections.
-      // The default is true.
-      "tcp-nodelay": true,
-
-      // This parameter configures consistency level. The default is "quorum".
-      // Supported values:
-      // - any
-      // - one
-      // - two
-      // - three
-      // - quorum
-      // - all
-      // - local-quorum
-      // - each-quorum
-      // - serial
-      // - local-serial
-      // - local-one
-      // See https://docs.datastax.com/en/cassandra/3.0/cassandra/dml/dmlConfigConsistency.html for more details.
-      "consistency": "quorum",
-
-      // This parameter configures serial consistency level which manages
-      // lightweight transaction isolation. The default is "serial".
-      // Supported values:
-      // - any
-      // - one
-      // - two
-      // - three
-      // - quorum
-      // - all
-      // - local-quorum
-      // - each-quorum
-      // - serial
-      // - local-serial
-      // - local-one
-      // See https://docs.datastax.com/en/cassandra/3.0/cassandra/dml/dmlConfigSerialConsistency.html for more details.
-      "serial-consistency": "serial"
-  },
-
-// Addresses will be assigned with preferred and valid lifetimes
-// being 3000 and 4000, respectively. Client is told to start
-// renewing after 1000 seconds. If the server does not respond
-// after 2000 seconds since the lease was granted, client is supposed
-// to start REBIND procedure (emergency renewal that allows switching
-// to a different server).
-  "preferred-lifetime": 3000,
-  "valid-lifetime": 4000,
-  "renew-timer": 1000,
-  "rebind-timer": 2000,
-
-// The following list defines subnets. Each subnet consists of at
-// least subnet and pool entries.
-  "subnet6": [
-    {
-      "pools": [ { "pool": "2001:db8:1::/80" } ],
-      "subnet": "2001:db8:1::/64",
-      "interface": "ethX"
-    }
-  ],
-
-// The following configures logging. It assumes that messages with at
-// least informational level (info, warn, error and fatal) should be
-// logged to stdout.
-    "loggers": [
-        {
-            "name": "kea-dhcp6",
-            "output_options": [
-                {
-                    "output": "stdout"
-                }
-            ],
-            "debuglevel": 0,
-            "severity": "INFO"
-        }
-    ]
-}
-
-}
diff --git a/doc/examples/kea6/duid.json b/doc/examples/kea6/duid.json
index 5fb0641a51..44e8a9b009 100644
--- a/doc/examples/kea6/duid.json
+++ b/doc/examples/kea6/duid.json
@@ -32,7 +32,7 @@
 
 // We need to specify the database used to store leases. As of
 // September 2016, four database backends are supported: MySQL,
-// PostgreSQL, Cassandra, and the in-memory database, Memfile.
+// PostgreSQL and the in-memory database, Memfile.
 // We'll use memfile  because it doesn't require any prior set up.
   "lease-database": {
       "type": "memfile",
diff --git a/doc/examples/kea6/global-reservations.json b/doc/examples/kea6/global-reservations.json
index 34de838f44..986b4cb5a2 100644
--- a/doc/examples/kea6/global-reservations.json
+++ b/doc/examples/kea6/global-reservations.json
@@ -16,7 +16,7 @@
 
 // We need to specify the database used to store leases. As of
 // September 2016, four database backends are supported: MySQL,
-// PostgreSQL, Cassandra, and the in-memory database, Memfile.
+// PostgreSQL and the in-memory database, Memfile.
 // We'll use memfile  because it doesn't require any prior set up.
   "lease-database": {
       "type": "memfile",
diff --git a/doc/examples/kea6/ha-hot-standby.json b/doc/examples/kea6/ha-hot-standby.json
index a4c0207cf0..9675e6f7d5 100644
--- a/doc/examples/kea6/ha-hot-standby.json
+++ b/doc/examples/kea6/ha-hot-standby.json
@@ -26,8 +26,8 @@
 
     // Use Memfile lease database backend to store leases in a CSV file.
     // Depending on how Kea was compiled, it may also support SQL databases
-    // (MySQL and/or PostgreSQL) and even Cassandra. Those database backends
-    // require more parameters, like name, host and possibly user and password.
+    // (MySQL and/or PostgreSQL). Those database backends require more
+    // parameters, like name, host and possibly user and password.
     // There are dedicated examples for each backend. See Section 7.2.2 "Lease
     // Storage" for details.
     "lease-database": {
diff --git a/doc/examples/kea6/leases-expiration.json b/doc/examples/kea6/leases-expiration.json
index 5ac98ed5d0..12f754e558 100644
--- a/doc/examples/kea6/leases-expiration.json
+++ b/doc/examples/kea6/leases-expiration.json
@@ -12,7 +12,7 @@
 
 // We need to specify the database used to store leases. As of
 // September 2016, four database backends are supported: MySQL,
-// PostgreSQL, Cassandra, and the in-memory database, Memfile.
+// PostgreSQL and the in-memory database, Memfile.
 // We'll use memfile  because it doesn't require any prior set up.
 // Note, we're setting the maximum number of row read errors to 100,
 // (defaults to 0, meaning unlimited).
diff --git a/doc/examples/kea6/multiple-options.json b/doc/examples/kea6/multiple-options.json
index a8d42eaef6..0abeba0227 100644
--- a/doc/examples/kea6/multiple-options.json
+++ b/doc/examples/kea6/multiple-options.json
@@ -11,7 +11,7 @@
 
 // We need to specify the database used to store leases. As of
 // September 2016, four database backends are supported: MySQL,
-// PostgreSQL, Cassandra, and the in-memory database, Memfile.
+// PostgreSQL and the in-memory database, Memfile.
 // We'll use memfile  because it doesn't require any prior set up.
   "lease-database": {
     "type": "memfile"
diff --git a/doc/examples/kea6/mysql-reservations.json b/doc/examples/kea6/mysql-reservations.json
index f8decf2711..1b4a9d8752 100644
--- a/doc/examples/kea6/mysql-reservations.json
+++ b/doc/examples/kea6/mysql-reservations.json
@@ -12,7 +12,7 @@
 
 // We need to specify the database used to store leases. As of
 // September 2016, four database backends are supported: MySQL,
-// PostgreSQL, Cassandra, and the in-memory database, Memfile.
+// PostgreSQL and the in-memory database, Memfile.
 // We'll use memfile  because it doesn't require any prior set up.
   "lease-database": {
       "type": "memfile",
diff --git a/doc/examples/kea6/pgsql-reservations.json b/doc/examples/kea6/pgsql-reservations.json
index 0c611469a0..4656541d42 100644
--- a/doc/examples/kea6/pgsql-reservations.json
+++ b/doc/examples/kea6/pgsql-reservations.json
@@ -12,7 +12,7 @@
 
 // We need to specify the database used to store leases. As of
 // September 2016, four database backends are supported: MySQL,
-// PostgreSQL, Cassandra, and the in-memory database, Memfile.
+// PostgreSQL and the in-memory database, Memfile.
 // We'll use memfile  because it doesn't require any prior set up.
   "lease-database": {
     "type": "memfile"
diff --git a/doc/examples/kea6/reservations.json b/doc/examples/kea6/reservations.json
index 96f28b8b19..2460deb1a1 100644
--- a/doc/examples/kea6/reservations.json
+++ b/doc/examples/kea6/reservations.json
@@ -14,7 +14,7 @@
 
 // We need to specify the database used to store leases. As of
 // September 2016, four database backends are supported: MySQL,
-// PostgreSQL, Cassandra, and the in-memory database, Memfile.
+// PostgreSQL and the in-memory database, Memfile.
 // We'll use memfile  because it doesn't require any prior set up.
   "lease-database": {
       "type": "memfile",
diff --git a/doc/examples/kea6/several-subnets.json b/doc/examples/kea6/several-subnets.json
index 226875997f..b3f0b1ead5 100644
--- a/doc/examples/kea6/several-subnets.json
+++ b/doc/examples/kea6/several-subnets.json
@@ -12,7 +12,7 @@
 
 // We need to specify the database used to store leases. As of
 // September 2016, four database backends are supported: MySQL,
-// PostgreSQL, Cassandra, and the in-memory database, Memfile.
+// PostgreSQL and the in-memory database, Memfile.
 // We'll use memfile  because it doesn't require any prior set up.
   "lease-database": {
     "type": "memfile"
diff --git a/doc/examples/kea6/simple.json b/doc/examples/kea6/simple.json
index e359df5eb3..8f1b7522ad 100644
--- a/doc/examples/kea6/simple.json
+++ b/doc/examples/kea6/simple.json
@@ -13,7 +13,7 @@
 
 // We need to specify the database used to store leases. As of
 // September 2016, four database backends are supported: MySQL,
-// PostgreSQL, Cassandra, and the in-memory database, Memfile.
+// PostgreSQL and the in-memory database, Memfile.
 // We'll use memfile  because it doesn't require any prior set up.
   "lease-database": {
       "type": "memfile",
diff --git a/doc/examples/kea6/tee-times.json b/doc/examples/kea6/tee-times.json
index 6b14649cab..d5f80f4c09 100644
--- a/doc/examples/kea6/tee-times.json
+++ b/doc/examples/kea6/tee-times.json
@@ -12,7 +12,7 @@
 
 // We need to specify the database used to store leases. As of
 // September 2016, four database backends are supported: MySQL,
-// PostgreSQL, Cassandra, and the in-memory database, Memfile.
+// PostgreSQL and the in-memory database, Memfile.
 // We'll use memfile  because it doesn't require any prior set up.
   "lease-database": {
     "type": "memfile"
diff --git a/doc/examples/kea6/with-ddns.json b/doc/examples/kea6/with-ddns.json
index afc823a373..3506483a08 100644
--- a/doc/examples/kea6/with-ddns.json
+++ b/doc/examples/kea6/with-ddns.json
@@ -13,7 +13,7 @@
 
 // We need to specify the database used to store leases. As of
 // September 2016, four database backends are supported: MySQL,
-// PostgreSQL, Cassandra, and the in-memory database, Memfile.
+// PostgreSQL and the in-memory database, Memfile.
 // We'll use memfile  because it doesn't require any prior set up.
   "lease-database": {
       "type": "memfile",