modularized all source code (#4391)

* modularized all external plugins

* added README.md in plugins

* fixed title

* fixed typo

* relative link to external plugins

* external plugins configuration README

* added plugins link

* remove plugins link

* plugin names are links

* added links to external plugins

* removed unecessary spacing

* list to table

* added language

* fixed typo

* list to table on internal plugins

* added more documentation to internal plugins

* moved python, node, and bash code and configs into the external plugins

* added statsd README

* fix bug with corrupting config.h every 2nd compilation

* moved all config files together with their code

* more documentation

* diskspace info

* fixed broken links in apps.plugin

* added backends docs

* updated plugins readme

* move nc-backend.sh to backends

* created daemon directory

* moved all code outside src/

* fixed readme identation

* renamed plugins.d.plugin to plugins.d

* updated readme

* removed linux- from linux plugins

* updated readme

* updated readme

* updated readme

* updated readme

* updated readme

* updated readme

* fixed README.md links

* fixed netdata tree links

* updated codacy, codeclimate and lgtm excluded paths

* update CMakeLists.txt

* updated automake options at top directory

* libnetdata slit into directories

* updated READMEs

* updated READMEs

* updated ARL docs

* updated ARL docs

* moved /plugins to /collectors

* moved all external plugins outside plugins.d

* updated codacy, codeclimate, lgtm

* updated README

* updated url

* updated readme

* updated readme

* updated readme

* updated readme

* moved api and web into webserver

* web/api web/gui web/server

* modularized webserver

* removed web/gui/version.txt

1 files changed, 133 insertions, 0 deletions

diff --git a/collectors/proc.plugin/proc_net_ip_vs_stats.c b/collectors/proc.plugin/proc_net_ip_vs_stats.c
new file mode 100644
index 0000000000..43dcf2a88b
--- /dev/null
+++ b/collectors/proc.plugin/proc_net_ip_vs_stats.c
@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "plugin_proc.h"
+
+#define RRD_TYPE_NET_IPVS "ipvs"
+#define PLUGIN_PROC_MODULE_NET_IPVS_NAME "/proc/net/ip_vs_stats"
+#define CONFIG_SECTION_PLUGIN_PROC_NET_IPVS "plugin:" PLUGIN_PROC_CONFIG_NAME ":" PLUGIN_PROC_MODULE_NET_IPVS_NAME
+
+int do_proc_net_ip_vs_stats(int update_every, usec_t dt) {
+    (void)dt;
+    static int do_bandwidth = -1, do_sockets = -1, do_packets = -1;
+    static procfile *ff = NULL;
+
+    if(do_bandwidth == -1)  do_bandwidth    = config_get_boolean(CONFIG_SECTION_PLUGIN_PROC_NET_IPVS, "IPVS bandwidth", 1);
+    if(do_sockets == -1)    do_sockets      = config_get_boolean(CONFIG_SECTION_PLUGIN_PROC_NET_IPVS, "IPVS connections", 1);
+    if(do_packets == -1)    do_packets      = config_get_boolean(CONFIG_SECTION_PLUGIN_PROC_NET_IPVS, "IPVS packets", 1);
+
+    if(!ff) {
+        char filename[FILENAME_MAX + 1];
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/net/ip_vs_stats");
+        ff = procfile_open(config_get(CONFIG_SECTION_PLUGIN_PROC_NET_IPVS, "filename to monitor", filename), " \t,:|", PROCFILE_FLAG_DEFAULT);
+    }
+    if(!ff) return 1;
+
+    ff = procfile_readall(ff);
+    if(!ff) return 0; // we return 0, so that we will retry to open it next time
+
+    // make sure we have 3 lines
+    if(procfile_lines(ff) < 3) return 1;
+
+    // make sure we have 5 words on the 3rd line
+    if(procfile_linewords(ff, 2) < 5) return 1;
+
+    unsigned long long entries, InPackets, OutPackets, InBytes, OutBytes;
+
+    entries     = strtoull(procfile_lineword(ff, 2, 0), NULL, 16);
+    InPackets   = strtoull(procfile_lineword(ff, 2, 1), NULL, 16);
+    OutPackets  = strtoull(procfile_lineword(ff, 2, 2), NULL, 16);
+    InBytes     = strtoull(procfile_lineword(ff, 2, 3), NULL, 16);
+    OutBytes    = strtoull(procfile_lineword(ff, 2, 4), NULL, 16);
+
+
+    // --------------------------------------------------------------------
+
+    if(do_sockets) {
+        static RRDSET *st = NULL;
+
+        if(unlikely(!st)) {
+            st = rrdset_create_localhost(
+                    RRD_TYPE_NET_IPVS
+                    , "sockets"
+                    , NULL
+                    , RRD_TYPE_NET_IPVS
+                    , NULL
+                    , "IPVS New Connections"
+                    , "connections/s"
+                    , PLUGIN_PROC_NAME
+                    , PLUGIN_PROC_MODULE_NET_IPVS_NAME
+                    , NETDATA_CHART_PRIO_IPVS_SOCKETS
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+
+            rrddim_add(st, "connections", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+        }
+        else rrdset_next(st);
+
+        rrddim_set(st, "connections", entries);
+        rrdset_done(st);
+    }
+
+    // --------------------------------------------------------------------
+
+    if(do_packets) {
+        static RRDSET *st = NULL;
+        if(unlikely(!st)) {
+            st = rrdset_create_localhost(
+                    RRD_TYPE_NET_IPVS
+                    , "packets"
+                    , NULL
+                    , RRD_TYPE_NET_IPVS
+                    , NULL
+                    , "IPVS Packets"
+                    , "packets/s"
+                    , PLUGIN_PROC_NAME
+                    , PLUGIN_PROC_MODULE_NET_IPVS_NAME
+                    , NETDATA_CHART_PRIO_IPVS_PACKETS
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+
+            rrddim_add(st, "received", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rrddim_add(st, "sent", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
+        }
+        else rrdset_next(st);
+
+        rrddim_set(st, "received", InPackets);
+        rrddim_set(st, "sent", OutPackets);
+        rrdset_done(st);
+    }
+
+    // --------------------------------------------------------------------
+
+    if(do_bandwidth) {
+        static RRDSET *st = NULL;
+        if(unlikely(!st)) {
+            st = rrdset_create_localhost(
+                    RRD_TYPE_NET_IPVS
+                    , "net"
+                    , NULL
+                    , RRD_TYPE_NET_IPVS
+                    , NULL
+                    , "IPVS Bandwidth"
+                    , "kilobits/s"
+                    , PLUGIN_PROC_NAME
+                    , PLUGIN_PROC_MODULE_NET_IPVS_NAME
+                    , NETDATA_CHART_PRIO_IPVS_NET
+                    , update_every
+                    , RRDSET_TYPE_AREA
+            );
+
+            rrddim_add(st, "received", NULL, 8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+            rrddim_add(st, "sent", NULL,    -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+        }
+        else rrdset_next(st);
+
+        rrddim_set(st, "received", InBytes);
+        rrddim_set(st, "sent", OutBytes);
+        rrdset_done(st);
+    }
+
+    return 0;
+}