Forward core collector's stdout and stderr to /dev/console

The default core collector, makedumpfile, has functionality to print the
ETA for dump capture. However, due to a limitation/bug in systemd,
executing the kdump.sh script via a systemd service does not print the
ETA on the console, even though StandardError is set to journal+console.

On machines with high memory in the terabyte range, processing the dump
takes time. Since makedumpfile’s ETA is not printed on the console while
collecting the dump, there have been a few instances where system
administrators rebooted the system during dump capture, assuming the
system was stuck.

Until the systemd service issue [1] is fixed, forward the core
collector’s stdout and stderr to /dev/console manually. This will print
the ETA for dump capture and let the user know that dump capture is
ongoing.

[1] systemd/systemd#37994

Signed-off-by: Sourabh Jain <[email protected]>

Author: sourabhjains

dracut/99kdumpbase/kdump.sh

@@ -182,7 +182,7 @@ dump_fs() {
     KDUMP_LOG_DEST=$_dump_fs_path/
     KDUMP_LOG_OP="mv '$KDUMP_LOG_FILE' '$KDUMP_LOG_DEST/'"
 
-    $CORE_COLLECTOR /proc/vmcore "$_dump_fs_path/vmcore-incomplete"
+    $CORE_COLLECTOR /proc/vmcore "$_dump_fs_path/vmcore-incomplete" > /dev/console 2>&1
     _dump_exitcode=$?
     if [ $_dump_exitcode -eq 0 ]; then
         sync -f "$_dump_fs_path/vmcore-incomplete"