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0c4b27 |
From 760680df771b6e2a9fbcd2f6d9862df4ec1a86de Mon Sep 17 00:00:00 2001
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0c4b27 |
From: Reid Wahl <nrwahl@protonmail.com>
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0c4b27 |
Date: Tue, 9 Mar 2021 18:25:52 -0800
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0c4b27 |
Subject: [PATCH 1/2] azure-lb: Be quiet during stop operation
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0c4b27 |
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0c4b27 |
Currently, it logs "kill (<pid>) No such process" to stderr during stops.
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0c4b27 |
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0c4b27 |
A stop operation is expected to run `kill -s 0 $pid` for a nonexistent
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0c4b27 |
PID, so log that at debug level.
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0c4b27 |
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0c4b27 |
A start or monitor operation's `kill -s 0 $pid` should always succeed,
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0c4b27 |
so any output is unexpected and an error.
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0c4b27 |
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0c4b27 |
Also remove "local" bashism.
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0c4b27 |
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0c4b27 |
Signed-off-by: Reid Wahl <nrwahl@protonmail.com>
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0c4b27 |
---
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0c4b27 |
heartbeat/azure-lb | 22 ++++++++++++++--------
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0c4b27 |
1 file changed, 14 insertions(+), 8 deletions(-)
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0c4b27 |
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0c4b27 |
diff --git a/heartbeat/azure-lb b/heartbeat/azure-lb
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0c4b27 |
index 65a12235b..863132744 100755
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0c4b27 |
--- a/heartbeat/azure-lb
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0c4b27 |
+++ b/heartbeat/azure-lb
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0c4b27 |
@@ -93,12 +93,18 @@ getpid() {
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0c4b27 |
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0c4b27 |
lb_monitor() {
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0c4b27 |
if test -f "$pidfile"; then
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0c4b27 |
- if pid=`getpid $pidfile` && [ "$pid" ] && kill -s 0 $pid; then
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0c4b27 |
- return $OCF_SUCCESS
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0c4b27 |
- else
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0c4b27 |
- # pidfile w/o process means the process died
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0c4b27 |
- return $OCF_ERR_GENERIC
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0c4b27 |
+ [ "$__OCF_ACTION" = "stop" ] && level="debug" || level="err"
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0c4b27 |
+
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0c4b27 |
+ if pid=$(getpid "$pidfile") && [ -n "$pid" ]; then
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0c4b27 |
+ output=$(kill -s 0 "$pid" 2>&1)
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0c4b27 |
+ mon_rc=$?
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0c4b27 |
+
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0c4b27 |
+ [ -n "$output" ] && ocf_log "$level" "$output"
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0c4b27 |
+ [ "$mon_rc" -eq 0 ] && return $OCF_SUCCESS
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0c4b27 |
fi
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0c4b27 |
+
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0c4b27 |
+ # pidfile w/o process means the process died
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0c4b27 |
+ return $OCF_ERR_GENERIC
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0c4b27 |
else
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0c4b27 |
return $OCF_NOT_RUNNING
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0c4b27 |
fi
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0c4b27 |
@@ -131,7 +137,7 @@ lb_start() {
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0c4b27 |
}
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0c4b27 |
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0c4b27 |
lb_stop() {
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0c4b27 |
- local rc=$OCF_SUCCESS
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0c4b27 |
+ stop_rc=$OCF_SUCCESS
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0c4b27 |
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0c4b27 |
if [ -n "$OCF_RESKEY_CRM_meta_timeout" ]; then
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0c4b27 |
# Allow 2/3 of the action timeout for the orderly shutdown
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0c4b27 |
@@ -160,7 +166,7 @@ lb_stop() {
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0c4b27 |
while :; do
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0c4b27 |
if ! lb_monitor; then
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0c4b27 |
ocf_log warn "SIGKILL did the job."
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0c4b27 |
- rc=$OCF_SUCCESS
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0c4b27 |
+ stop_rc=$OCF_SUCCESS
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0c4b27 |
break
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0c4b27 |
fi
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0c4b27 |
ocf_log info "The job still hasn't stopped yet. Waiting..."
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0c4b27 |
@@ -168,7 +174,7 @@ lb_stop() {
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0c4b27 |
done
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0c4b27 |
fi
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0c4b27 |
rm -f $pidfile
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0c4b27 |
- return $rc
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0c4b27 |
+ return $stop_rc
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0c4b27 |
}
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0c4b27 |
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0c4b27 |
lb_validate() {
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0c4b27 |
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0c4b27 |
From 10f39e90d6b04c28752a4f9adc94dfc03d9d61b8 Mon Sep 17 00:00:00 2001
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0c4b27 |
From: Reid Wahl <nrwahl@protonmail.com>
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0c4b27 |
Date: Tue, 9 Mar 2021 18:32:45 -0800
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0c4b27 |
Subject: [PATCH 2/2] azure-lb: Redirect stdout and stderr to /dev/null
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0c4b27 |
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0c4b27 |
This fixes a regression introduced in commit d22700fc.
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0c4b27 |
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0c4b27 |
When the nc listener process created by an azure-lb resource attempts to
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0c4b27 |
write to stdout, it dies with an EPIPE error.
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0c4b27 |
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0c4b27 |
This can happen when random/garbage input is sent to the nc listener, as
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0c4b27 |
may happen during a port scan. For example, if the listener is on port
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0c4b27 |
62000, and a client sends some text (e.g., `echo test | nc node1
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0c4b27 |
62000`), then the listener attempts to echo "test" to its stdout. This
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0c4b27 |
fails with an EPIPE.
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0c4b27 |
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Prior to commit d22700fc, all output was redirected to the pid file.
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0c4b27 |
This caused its own problems, but it prevented this particular behavior.
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0c4b27 |
The fix is to redirect the listener's stdout and stderr to /dev/null.
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0c4b27 |
Resolves: RHBZ#1937142
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Resolves: RHBZ#1937151
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Signed-off-by: Reid Wahl <nrwahl@protonmail.com>
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---
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0c4b27 |
heartbeat/azure-lb | 2 +-
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0c4b27 |
1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/heartbeat/azure-lb b/heartbeat/azure-lb
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index 863132744..ade1b4577 100755
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--- a/heartbeat/azure-lb
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0c4b27 |
+++ b/heartbeat/azure-lb
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@@ -119,7 +119,7 @@ lb_start() {
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if ! lb_monitor; then
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ocf_log debug "Starting $process: $cmd"
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# Execute the command as created above
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- $cmd &
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+ $cmd >/dev/null 2>&1 &
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echo $! > $pidfile
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if lb_monitor; then
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ocf_log debug "$process: $cmd started successfully, calling monitor"
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