diff --git a/oslo_cache/_bmemcache_pool.py b/oslo_cache/_bmemcache_pool.py
index a442757f..2edf4521 100644
--- a/oslo_cache/_bmemcache_pool.py
+++ b/oslo_cache/_bmemcache_pool.py
@@ -14,6 +14,7 @@
 # under the License.
 
 """Thread-safe connection pool for python-binary-memcached."""
+import debtcollector
 try:
     import eventlet
 except ImportError:
@@ -25,6 +26,16 @@ from oslo_log import log
 LOG = log.getLogger(__name__)
 
 
+if eventlet and eventlet.patcher.is_monkey_patched('thread'):
+    debtcollector.deprecate(
+        "Eventlet support is deprecated "
+        "and will be soon no longer supported. "
+        "This backend was originally designed to be compatible with Eventlet "
+        "and with monkey patching, so using this backend in an environment "
+        "with eventlet is now deprecated. "
+        "Please migrate your code and stop monkey patching your environment.")
+
+
 class _BMemcacheClient(bmemcached.Client):
     """Thread global memcache client
 
diff --git a/oslo_cache/_memcache_pool.py b/oslo_cache/_memcache_pool.py
index f31f49fa..a3855a9d 100644
--- a/oslo_cache/_memcache_pool.py
+++ b/oslo_cache/_memcache_pool.py
@@ -22,6 +22,7 @@ import queue
 import threading
 import time
 
+import debtcollector
 try:
     import eventlet
 except ImportError:
@@ -36,6 +37,16 @@ from oslo_cache import exception
 LOG = log.getLogger(__name__)
 
 
+if eventlet and eventlet.patcher.is_monkey_patched('thread'):
+    debtcollector.deprecate(
+        "Eventlet support is deprecated "
+        "and will be soon no longer supported. "
+        "This backend was originally designed to be compatible with Eventlet "
+        "and with monkey patching, so using this backend in an environment "
+        "with eventlet is now deprecated. "
+        "Please migrate your code and stop monkey patching your environment.")
+
+
 class _MemcacheClient(memcache.Client):
     """Thread global memcache client
 
diff --git a/releasenotes/notes/deprecate-memcache_pool-backend-98f1267e4e912004.yaml b/releasenotes/notes/deprecate-memcache_pool-backend-98f1267e4e912004.yaml
new file mode 100644
index 00000000..90f7b76b
--- /dev/null
+++ b/releasenotes/notes/deprecate-memcache_pool-backend-98f1267e4e912004.yaml
@@ -0,0 +1,11 @@
+---
+deprecations:
+  - |
+    Eventlet usages are deprecated and the removal of Eventlet from
+    OpenStack `is planned <https://governance.openstack.org/tc//goals/proposed/remove-eventlet.html>`_,
+    for this reason, using the ``memcache_pool`` backend of oslo.cache
+    in an environment using eventlet is now deprecated.
+    The support of Eventlet will be soon removed from oslo.cache.
+
+    Please start considering removing your internal Eventlet usages and
+    start migrating your stack.
diff --git a/requirements.txt b/requirements.txt
index c3e0e0e7..122d81fe 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,3 +7,4 @@ oslo.config>=8.1.0 # Apache-2.0
 oslo.i18n>=5.0.0 # Apache-2.0
 oslo.log>=4.2.1 # Apache-2.0
 oslo.utils>=4.2.0 # Apache-2.0
+debtcollector>=3.0.0 # Apache-2.0