MXS-1330: Add alter command

Servers, monitors and services can now be altered with MaxCtrl.

client/maxctrl/lib/alter.js

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2016 MariaDB Corporation Ab
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl11.
+ *
+ * Change Date: 2020-01-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2 or later of the General
+ * Public License.
+ */
+require('../common.js')()
+
+exports.command = 'alter <command>'
+exports.desc = 'Alter objects'
+exports.handler = function() {}
+exports.builder = function(yargs) {
+    yargs
+        .command('server <server> <key> <value>', 'Alter server parameters', {}, function(argv) {
+            updateValue('servers/' + argv.server, "data.attributes.parameters." + argv.key, argv.value)
+        })
+        .command('monitor <monitor> <key> <value>', 'Alter monitor parameters', {}, function(argv) {
+            updateValue('monitors/' + argv.monitor, "data.attributes.parameters." + argv.key, argv.value)
+        })
+        .command('service <service> <key> <value>', 'Alter service parameters', {}, function(argv) {
+            updateValue('services/' + argv.service, "data.attributes.parameters." + argv.key, argv.value)
+        })
+        .command('maxscale <key> <value>', 'Alter MaxScale parameters', {}, function(argv) {
+            updateValue('maxscale', "attributes.parameters." + argv.key, argv.value)
+        })
+        .usage('Usage: alter <command>')
+        .help()
+        .command('*', 'the default command', {}, () => {
+            console.log('Unknown command. See output of `help alter` for a list of commands.')
+        })
+}

client/maxctrl/lib/show.js

@@ -29,7 +29,8 @@ exports.builder = function(yargs) {
                 {'Master ID': 'attributes.master_id'},
                 {'Node ID': 'attributes.node_id'},
                 {'Slave Server IDs': 'attributes.slaves'},
-                {'Statistics': 'attributes.statistics'}
+                {'Statistics': 'attributes.statistics'},
+                {'Parameters': 'attributes.parameters'}
             ])
         })
         .command('service <service>', 'Show service', {}, function(argv) {

client/maxctrl/maxctrl.js

@@ -62,6 +62,7 @@ program
     .command(require('./lib/unlink.js'))
     .command(require('./lib/start.js'))
     .command(require('./lib/stop.js'))
+    .command(require('./lib/alter.js'))
     .help()
     .demandCommand(1, 'At least one command is required')
     .command('*', 'the default command', {}, () => {