diff --git a/doc-writing-python-agents-add-description-of-is_prob.patch b/doc-writing-python-agents-add-description-of-is_prob.patch
new file mode 100644
index 0000000000000000000000000000000000000000..a4bd6d520f10417e7ad9e5a9d5683fffef432a7e
--- /dev/null
+++ b/doc-writing-python-agents-add-description-of-is_prob.patch
@@ -0,0 +1,29 @@
+From db77cd138eede869b31ac71782be674d39a1377c Mon Sep 17 00:00:00 2001
+From: Oyvind Albrigtsen <oalbrigt@redhat.com>
+Date: Tue, 23 Apr 2024 13:15:06 +0200
+Subject: [PATCH] doc: writing-python-agents: add description of is_probe() and
+ distro()
+
+---
+ doc/dev-guides/writing-python-agents.md | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/doc/dev-guides/writing-python-agents.md b/doc/dev-guides/writing-python-agents.md
+index 9bf89d09..1b05e23b 100644
+--- a/doc/dev-guides/writing-python-agents.md
++++ b/doc/dev-guides/writing-python-agents.md
+@@ -52,7 +52,11 @@ logger.error("Something went terribly wrong.")
+ * `ocf_exit_reason`: Prints the exit error string to stderr.
+ * `have_binary`: Returns True if the given binary is available.
+ * `is_true`: Converts an OCF truth value to a Python boolean.
++* `is_probe`: Returns True when running a probe action. Used to return
++  OCF_NOT_RUNNING instead of error code that would cause unexpected actions
++  like fencing before starting the resource or when it is disabled.
+ * `get_parameter`: Looks up the matching `OCF_RESKEY_` environment variable.
++* `distro`: Returns <Distro>/<Version> or <Distro> if version info is unavailable.
+ * `Agent`: Class which helps to generate the XML metadata.
+ * `run`: OCF run loop implementation.
+ 
+-- 
+2.25.1
+
diff --git a/resource-agents.spec b/resource-agents.spec
index dcf1f3e2fe176356b0d3cf726ed7d147c9f780a6..51300e46d53e146b54679f16a88758cf67c1493d 100644
--- a/resource-agents.spec
+++ b/resource-agents.spec
@@ -1,7 +1,7 @@
 Name:                resource-agents
 Summary:             Open Source HA Reusable Cluster Resource Scripts
 Version:             4.13.0
-Release:             19
+Release:             20
 License:             GPLv2+ and LGPLv2+
 URL:                 https://github.com/ClusterLabs/resource-agents
 Source0:             https://github.com/ClusterLabs/resource-agents/archive/v%{version}.tar.gz
@@ -24,6 +24,7 @@ Patch0015:	     findifsh-fix-corner-cases.patch
 Patch0016:	     fix-OCF_SUCESS-name-in-db2_notify.patch
 Patch0017:           docs-writing-python-agents-update-required-Python-ve.patch
 Patch0018:	     galera-allow-joiner-to-report-non-Primary-during-ini.patch
+Patch0019:	     doc-writing-python-agents-add-description-of-is_prob.patch
 Obsoletes:           heartbeat-resources <= %{version}
 Provides:            heartbeat-resources = %{version}
 BuildRequires:       automake autoconf pkgconfig gcc perl-interpreter perl-generators python3-devel
@@ -121,6 +122,9 @@ export CFLAGS="$(echo '%{optflags}')"
 %{_mandir}/man8/{ocf-tester.8*,ldirectord.8*}
 
 %changelog
+* Thu Apr 25 2024 zouzhimin <zouzhimin@kylinos.cn> - 4.13.0-20
+- doc: writing-python-agents: add description of is_probe() and distro()
+
 * Tue Apr 22 2024 bixiaoyan <bixiaoyan@kylinos.cn> - 4.13.0-19
 - galera: allow joiner to report non-Primary during initial IST