diff --git a/vendor/github.com/IBM/sarama/entrypoint.sh b/vendor/github.com/IBM/sarama/entrypoint.sh
new file mode 100644
index 0000000..9815d90
--- /dev/null
+++ b/vendor/github.com/IBM/sarama/entrypoint.sh
@@ -0,0 +1,46 @@
+#!/bin/bash
+
+set -eu
+set -o pipefail
+
+KAFKA_VERSION="${KAFKA_VERSION:-3.9.1}"
+KAFKA_HOME="/opt/kafka-${KAFKA_VERSION}"
+
+if [ ! -d "${KAFKA_HOME}" ]; then
+    echo 'Error: KAFKA_VERSION '$KAFKA_VERSION' not available in this image at '$KAFKA_HOME
+    exit 1
+fi
+
+cd "${KAFKA_HOME}" || exit 1
+
+# discard all empty/commented lines from default config and copy to /tmp
+sed -e '/^#/d' -e '/^$/d' config/server.properties >/tmp/server.properties
+
+echo "########################################################################" >>/tmp/server.properties
+
+# emulate kafka_configure_from_environment_variables from bitnami/bitnami-docker-kafka
+for var in "${!KAFKA_CFG_@}"; do
+    key="$(echo "$var" | sed -e 's/^KAFKA_CFG_//g' -e 's/_/\./g' -e 's/.*/\L&/')"
+    sed -e '/^'$key'/d' -i"" /tmp/server.properties
+    value="${!var}"
+    echo "$key=$value" >>/tmp/server.properties
+done
+
+# use KRaft if KAFKA_VERSION is 4.0.0 or newer
+if printf "%s\n4.0.0" "$KAFKA_VERSION" | sort -V | head -n1 | grep -q "^4.0.0$"; then
+  # remove zookeeper-only options from server.properties and setup storage
+  sed -e '/zookeeper.connect/d' \
+      -i /tmp/server.properties
+  bin/kafka-storage.sh format -t "$KAFKA_CFG_CLUSTER_ID" -c /tmp/server.properties --ignore-formatted
+else
+  # remove KRaft-only options from server.properties
+  sed -e '/process.roles/d' \
+      -e '/controller.quorum.voters/d' \
+      -e '/controller.listener.names/d' \
+      -e '/cluster.id/d' \
+      -i /tmp/server.properties
+fi
+
+sort /tmp/server.properties
+
+exec bin/kafka-server-start.sh /tmp/server.properties