MXS-2275 Add skeleton softfail/unsoftfail support

Add skeleton implementation for the functionality for being able
to softfail and unsoftfail a Clustrix node.

server/modules/monitor/clustrixmon/clustrixmon.cc

@@ -13,8 +13,38 @@
 
 #include "clustrixmon.hh"
 #include <maxscale/modinfo.h>
+#include <maxscale/modulecmd.hh>
 #include "clustrixmonitor.hh"
 
+namespace
+{
+
+bool handle_softfail(const MODULECMD_ARG* args, json_t** error_out)
+{
+    mxb_assert(args->argc == 2);
+    mxb_assert(MODULECMD_GET_TYPE(&args->argv[0].type) == MODULECMD_ARG_MONITOR);
+    mxb_assert(MODULECMD_GET_TYPE(&args->argv[1].type) == MODULECMD_ARG_SERVER);
+
+    ClustrixMonitor* pMon = static_cast<ClustrixMonitor*>(args->argv[0].value.monitor);
+    SERVER* pServer = args->argv[1].value.server;
+
+    return pMon->softfail(pServer, error_out);
+}
+
+bool handle_unsoftfail(const MODULECMD_ARG* args, json_t** error_out)
+{
+    mxb_assert(args->argc == 2);
+    mxb_assert(MODULECMD_GET_TYPE(&args->argv[0].type) == MODULECMD_ARG_MONITOR);
+    mxb_assert(MODULECMD_GET_TYPE(&args->argv[1].type) == MODULECMD_ARG_SERVER);
+
+    ClustrixMonitor* pMon = static_cast<ClustrixMonitor*>(args->argv[0].value.monitor);
+    SERVER* pServer = args->argv[1].value.server;
+
+    return pMon->unsoftfail(pServer, error_out);
+}
+
+}
+
 /**
  * The module entry point routine. It is this routine that
  * must populate the structure that is referred to as the
@@ -27,6 +57,36 @@ extern "C" MXS_MODULE* MXS_CREATE_MODULE()
 {
     MXS_NOTICE("Initialise the MariaDB Clustrix Monitor module.");
 
+    static modulecmd_arg_type_t softfail_argv[] =
+    {
+        {
+            MODULECMD_ARG_MONITOR | MODULECMD_ARG_NAME_MATCHES_DOMAIN,
+            "Monitor name (from configuration file"
+        },
+        {
+            MODULECMD_ARG_SERVER, "Node to be softfailed."
+        }
+    };
+
+    modulecmd_register_command(MXS_MODULE_NAME, "softfail", MODULECMD_TYPE_ACTIVE,
+                               handle_softfail, MXS_ARRAY_NELEMS(softfail_argv), softfail_argv,
+                               "Perform softfail of node");
+
+    static modulecmd_arg_type_t unsoftfail_argv[] =
+    {
+        {
+            MODULECMD_ARG_MONITOR | MODULECMD_ARG_NAME_MATCHES_DOMAIN,
+            "Monitor name (from configuration file"
+        },
+        {
+            MODULECMD_ARG_SERVER, "Node to be unsoftfailed."
+        }
+    };
+
+    modulecmd_register_command(MXS_MODULE_NAME, "unsoftfail", MODULECMD_TYPE_ACTIVE,
+                               handle_unsoftfail, MXS_ARRAY_NELEMS(unsoftfail_argv), unsoftfail_argv,
+                               "Perform unsoftfail of node");
+
     static MXS_MODULE info =
     {
         MXS_MODULE_API_MONITOR,

server/modules/monitor/clustrixmon/clustrixmonitor.cc

@@ -55,6 +55,18 @@ bool ClustrixMonitor::configure(const MXS_CONFIG_PARAMETER* pParams)
     return true;
 }
 
+bool ClustrixMonitor::softfail(SERVER* pServer, json_t** ppError)
+{
+    MXS_NOTICE("Should softfail %s.", pServer->address);
+    return true;
+}
+
+bool ClustrixMonitor::unsoftfail(SERVER* pServer, json_t** ppError)
+{
+    MXS_NOTICE("Should unsoftfail %s.", pServer->address);
+    return true;
+}
+
 void ClustrixMonitor::pre_loop()
 {
     make_health_check();

server/modules/monitor/clustrixmon/clustrixmonitor.hh

@@ -64,6 +64,9 @@ public:
 
     bool configure(const MXS_CONFIG_PARAMETER* pParams) override;
 
+    bool softfail(SERVER* pServer, json_t** ppError);
+    bool unsoftfail(SERVER* pServer, json_t** ppError);
+
 private:
     ClustrixMonitor(const std::string& name, const std::string& module);