1 files changed, 152 insertions, 0 deletions
diff --git a/src/fluent-bit/plugins/in_node_exporter_metrics/ne_stat_linux.c b/src/fluent-bit/plugins/in_node_exporter_metrics/ne_stat_linux.c
new file mode 100644
index 000000000..053fb2181
--- /dev/null
+++ b/src/fluent-bit/plugins/in_node_exporter_metrics/ne_stat_linux.c
@@ -0,0 +1,152 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+/*  Fluent Bit
+ *  ==========
+ *  Copyright (C) 2015-2022 The Fluent Bit Authors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#define _GNU_SOURCE
+
+#include <fluent-bit/flb_info.h>
+#include <fluent-bit/flb_input_plugin.h>
+
+#include "ne.h"
+#include "ne_utils.h"
+
+static int stat_configure(struct flb_ne *ctx)
+{
+    struct cmt_counter *c;
+    struct cmt_gauge *g;
+
+    /* node_intr_total */
+    c = cmt_counter_create(ctx->cmt, "node", "", "intr_total",
+                           "Total number of interrupts serviced.",
+                           0, NULL);
+    ctx->st_intr = c;
+
+    /* node_context_switches_total */
+    c = cmt_counter_create(ctx->cmt, "node", "", "context_switches_total",
+                           "Total number of context switches.",
+                           0, NULL);
+    ctx->st_context_switches = c;
+
+    /* node_forks_total */
+    c = cmt_counter_create(ctx->cmt, "node", "", "forks_total",
+                           "Total number of forks.",
+                           0, NULL);
+    ctx->st_forks = c;
+
+    /* node_boot_time_seconds */
+    g = cmt_gauge_create(ctx->cmt, "node", "", "boot_time_seconds",
+                         "Node boot time, in unixtime.",
+                         0, NULL);
+    ctx->st_boot_time = g;
+
+    /* node_procs_running */
+    g = cmt_gauge_create(ctx->cmt, "node", "", "procs_running",
+                         "Number of processes in runnable state.",
+                         0, NULL);
+    ctx->st_procs_running = g;
+
+    /* node_procs_blocked */
+    g = cmt_gauge_create(ctx->cmt, "node", "", "procs_blocked",
+                         "Number of processes blocked waiting for I/O to complete.",
+                         0, NULL);
+    ctx->st_procs_blocked = g;
+
+    return 0;
+}
+
+static int stat_update(struct flb_ne *ctx)
+{
+    int ret;
+    int parts;
+    uint64_t ts;
+    double d_val;
+    struct mk_list *head;
+    struct mk_list list;
+    struct mk_list split_list;
+    struct flb_slist_entry *line;
+    struct flb_slist_entry *entry;
+    struct flb_slist_entry *s_val;
+
+    mk_list_init(&list);
+    ret = ne_utils_file_read_lines(ctx->path_procfs, "/stat", &list);
+    if (ret == -1) {
+        return -1;
+    }
+
+    ts = cfl_time_now();
+
+    mk_list_foreach(head, &list) {
+        line = mk_list_entry(head, struct flb_slist_entry, _head);
+
+        mk_list_init(&split_list);
+        ret = flb_slist_split_string(&split_list, line->str, ' ', -1);
+        if (ret == -1) {
+            continue;
+        }
+        parts = ret;
+        if (parts == 0) {
+            flb_slist_destroy(&split_list);
+            continue;
+        }
+
+        /* metric name and value */
+        entry = flb_slist_entry_get(&split_list, 0);
+        s_val = flb_slist_entry_get(&split_list, 1);
+
+        if (strcmp(entry->str, "intr") == 0) {
+            ne_utils_str_to_double(s_val->str, &d_val);
+            cmt_counter_set(ctx->st_intr, ts, d_val, 0, NULL);
+        }
+        else if (strcmp(entry->str, "ctxt") == 0) {
+            ne_utils_str_to_double(s_val->str, &d_val);
+            cmt_counter_set(ctx->st_context_switches, ts, d_val, 0, NULL);
+        }
+        else if (strcmp(entry->str, "btime") == 0) {
+            ne_utils_str_to_double(s_val->str, &d_val);
+            cmt_gauge_set(ctx->st_boot_time, ts, d_val, 0, NULL);
+        }
+        else if (strcmp(entry->str, "processes") == 0) {
+            ne_utils_str_to_double(s_val->str, &d_val);
+            cmt_counter_set(ctx->st_forks, ts, d_val, 0, NULL);
+        }
+        else if (strcmp(entry->str, "procs_running") == 0) {
+            ne_utils_str_to_double(s_val->str, &d_val);
+            cmt_gauge_set(ctx->st_procs_running, ts, d_val, 0, NULL);
+        }
+        else if (strcmp(entry->str, "procs_blocked") == 0) {
+            ne_utils_str_to_double(s_val->str, &d_val);
+            cmt_gauge_set(ctx->st_procs_blocked, ts, d_val, 0, NULL);
+        }
+        flb_slist_destroy(&split_list);
+    }
+    flb_slist_destroy(&list);
+
+    return 0;
+}
+
+int ne_stat_init(struct flb_ne *ctx)
+{
+    stat_configure(ctx);
+    return 0;
+}
+
+int ne_stat_update(struct flb_ne *ctx)
+{
+    stat_update(ctx);
+    return 0;
+}