1 files changed, 49 insertions, 0 deletions
diff --git a/collectors/proc.plugin/proc_sys_kernel_random_entropy_avail.c b/collectors/proc.plugin/proc_sys_kernel_random_entropy_avail.c
new file mode 100644
index 000000000..20d2116ce
--- /dev/null
+++ b/collectors/proc.plugin/proc_sys_kernel_random_entropy_avail.c
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "plugin_proc.h"
+
+int do_proc_sys_kernel_random_entropy_avail(int update_every, usec_t dt) {
+    (void)dt;
+
+    static procfile *ff = NULL;
+
+    if(unlikely(!ff)) {
+        char filename[FILENAME_MAX + 1];
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/sys/kernel/random/entropy_avail");
+        ff = procfile_open(config_get("plugin:proc:/proc/sys/kernel/random/entropy_avail", "filename to monitor", filename), "", PROCFILE_FLAG_DEFAULT);
+        if(unlikely(!ff)) return 1;
+    }
+
+    ff = procfile_readall(ff);
+    if(unlikely(!ff)) return 0; // we return 0, so that we will retry to open it next time
+
+    unsigned long long entropy = str2ull(procfile_lineword(ff, 0, 0));
+
+    static RRDSET *st = NULL;
+    static RRDDIM *rd = NULL;
+
+    if(unlikely(!st)) {
+        st = rrdset_create_localhost(
+                "system"
+                , "entropy"
+                , NULL
+                , "entropy"
+                , NULL
+                , "Available Entropy"
+                , "entropy"
+                , PLUGIN_PROC_NAME
+                , "/proc/sys/kernel/random/entropy_avail"
+                , NETDATA_CHART_PRIO_SYSTEM_ENTROPY
+                , update_every
+                , RRDSET_TYPE_LINE
+        );
+
+        rd = rrddim_add(st, "entropy", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
+    }
+    else rrdset_next(st);
+
+    rrddim_set_by_pointer(st, rd, entropy);
+    rrdset_done(st);
+
+    return 0;
+}