diff --git a/cluster/docker-compose.yml b/cluster/docker-compose.yml
index 510e81e..ab3f5b5 100644
--- a/cluster/docker-compose.yml
+++ b/cluster/docker-compose.yml
@@ -56,6 +56,7 @@ services:
       - "mongodb3"
     environment:
       GRAYLOG_DATANODE_NODE_ID_FILE: "/var/lib/graylog-datanode/node-id"
+      # GRAYLOG_DATANODE_PASSWORD_SECRET and GRAYLOG_PASSWORD_SECRET MUST be the same value
       GRAYLOG_DATANODE_PASSWORD_SECRET: "${GRAYLOG_PASSWORD_SECRET:?Please configure GRAYLOG_PASSWORD_SECRET in the .env file}"
       GRAYLOG_DATANODE_ROOT_PASSWORD_SHA2: "${GRAYLOG_ROOT_PASSWORD_SHA2:?Please configure GRAYLOG_ROOT_PASSWORD_SHA2 in the .env file}"
       GRAYLOG_DATANODE_MONGODB_URI: "mongodb://mongodb1:27017,mongodb2:27017,mongodb3:27017/graylog"
@@ -86,6 +87,7 @@ services:
       - "mongodb3"
     environment:
       GRAYLOG_DATANODE_NODE_ID_FILE: "/var/lib/graylog-datanode/node-id"
+      # GRAYLOG_DATANODE_PASSWORD_SECRET and GRAYLOG_PASSWORD_SECRET MUST be the same value
       GRAYLOG_DATANODE_PASSWORD_SECRET: "${GRAYLOG_PASSWORD_SECRET:?Please configure GRAYLOG_PASSWORD_SECRET in the .env file}"
       GRAYLOG_DATANODE_ROOT_PASSWORD_SHA2: "${GRAYLOG_ROOT_PASSWORD_SHA2:?Please configure GRAYLOG_ROOT_PASSWORD_SHA2 in the .env file}"
       GRAYLOG_DATANODE_MONGODB_URI: "mongodb://mongodb1:27017,mongodb2:27017,mongodb3:27017/graylog"
@@ -116,6 +118,7 @@ services:
       - "mongodb3"
     environment:
       GRAYLOG_DATANODE_NODE_ID_FILE: "/var/lib/graylog-datanode/node-id"
+      # GRAYLOG_DATANODE_PASSWORD_SECRET and GRAYLOG_PASSWORD_SECRET MUST be the same value
       GRAYLOG_DATANODE_PASSWORD_SECRET: "${GRAYLOG_PASSWORD_SECRET:?Please configure GRAYLOG_PASSWORD_SECRET in the .env file}"
       GRAYLOG_DATANODE_ROOT_PASSWORD_SHA2: "${GRAYLOG_ROOT_PASSWORD_SHA2:?Please configure GRAYLOG_ROOT_PASSWORD_SHA2 in the .env file}"
       GRAYLOG_DATANODE_MONGODB_URI: "mongodb://mongodb1:27017,mongodb2:27017,mongodb3:27017/graylog"
@@ -145,6 +148,7 @@ services:
     entrypoint: "/docker-entrypoint.sh"
     environment:
       GRAYLOG_NODE_ID_FILE: "/usr/share/graylog/data/data/node-id"
+      # GRAYLOG_DATANODE_PASSWORD_SECRET and GRAYLOG_PASSWORD_SECRET MUST be the same value
       GRAYLOG_PASSWORD_SECRET: "${GRAYLOG_PASSWORD_SECRET:?Please configure GRAYLOG_PASSWORD_SECRET in the .env file}"
       GRAYLOG_ROOT_PASSWORD_SHA2: "${GRAYLOG_ROOT_PASSWORD_SHA2:?Please configure GRAYLOG_ROOT_PASSWORD_SHA2 in the .env file}"
       GRAYLOG_HTTP_EXTERNAL_URI: "http://127.0.0.1:9000/"
@@ -174,6 +178,7 @@ services:
     environment:
       GRAYLOG_IS_LEADER: "false"
       GRAYLOG_NODE_ID_FILE: "/usr/share/graylog/data/data/node-id"
+      # GRAYLOG_DATANODE_PASSWORD_SECRET and GRAYLOG_PASSWORD_SECRET MUST be the same value
       GRAYLOG_PASSWORD_SECRET: "${GRAYLOG_PASSWORD_SECRET:?Please configure GRAYLOG_PASSWORD_SECRET in the .env file}"
       GRAYLOG_ROOT_PASSWORD_SHA2: "${GRAYLOG_ROOT_PASSWORD_SHA2:?Please configure GRAYLOG_ROOT_PASSWORD_SHA2 in the .env file}"
       GRAYLOG_HTTP_EXTERNAL_URI: "http://127.0.0.1:9000/"
@@ -204,6 +209,7 @@ services:
     environment:
       GRAYLOG_IS_LEADER: "false"
       GRAYLOG_NODE_ID_FILE: "/usr/share/graylog/data/data/node-id"
+      # GRAYLOG_DATANODE_PASSWORD_SECRET and GRAYLOG_PASSWORD_SECRET MUST be the same value
       GRAYLOG_PASSWORD_SECRET: "${GRAYLOG_PASSWORD_SECRET:?Please configure GRAYLOG_PASSWORD_SECRET in the .env file}"
       GRAYLOG_ROOT_PASSWORD_SHA2: "${GRAYLOG_ROOT_PASSWORD_SHA2:?Please configure GRAYLOG_ROOT_PASSWORD_SHA2 in the .env file}"
       GRAYLOG_HTTP_EXTERNAL_URI: "http://127.0.0.1:9000/"
diff --git a/enterprise/docker-compose.yml b/enterprise/docker-compose.yml
index 8c03782..dea35c3 100644
--- a/enterprise/docker-compose.yml
+++ b/enterprise/docker-compose.yml
@@ -15,6 +15,7 @@ services:
     hostname: "datanode"
     environment:
       GRAYLOG_DATANODE_NODE_ID_FILE: "/var/lib/graylog-datanode/node-id"
+      # GRAYLOG_DATANODE_PASSWORD_SECRET and GRAYLOG_PASSWORD_SECRET MUST be the same value
       GRAYLOG_DATANODE_PASSWORD_SECRET: "${GRAYLOG_PASSWORD_SECRET:?Please configure GRAYLOG_PASSWORD_SECRET in the .env file}"
       GRAYLOG_DATANODE_ROOT_PASSWORD_SHA2: "${GRAYLOG_ROOT_PASSWORD_SHA2:?Please configure GRAYLOG_ROOT_PASSWORD_SHA2 in the .env file}"
       GRAYLOG_DATANODE_MONGODB_URI: "mongodb://mongodb:27017/graylog"
@@ -42,6 +43,7 @@ services:
     entrypoint: "/usr/bin/tini --  /docker-entrypoint.sh"
     environment:
       GRAYLOG_NODE_ID_FILE: "/usr/share/graylog/data/data/node-id"
+      # GRAYLOG_DATANODE_PASSWORD_SECRET and GRAYLOG_PASSWORD_SECRET MUST be the same value
       GRAYLOG_PASSWORD_SECRET: "${GRAYLOG_PASSWORD_SECRET:?Please configure GRAYLOG_PASSWORD_SECRET in the .env file}"
       GRAYLOG_ROOT_PASSWORD_SHA2: "${GRAYLOG_ROOT_PASSWORD_SHA2:?Please configure GRAYLOG_ROOT_PASSWORD_SHA2 in the .env file}"
       GRAYLOG_HTTP_BIND_ADDRESS: "0.0.0.0:9000"
diff --git a/open-core/docker-compose.yml b/open-core/docker-compose.yml
index d309bd8..63bc1d0 100644
--- a/open-core/docker-compose.yml
+++ b/open-core/docker-compose.yml
@@ -15,6 +15,7 @@ services:
     hostname: "datanode"
     environment:
       GRAYLOG_DATANODE_NODE_ID_FILE: "/var/lib/graylog-datanode/node-id"
+      # GRAYLOG_DATANODE_PASSWORD_SECRET and GRAYLOG_PASSWORD_SECRET MUST be the same value
       GRAYLOG_DATANODE_PASSWORD_SECRET: "${GRAYLOG_PASSWORD_SECRET:?Please configure GRAYLOG_PASSWORD_SECRET in the .env file}"
       GRAYLOG_DATANODE_ROOT_PASSWORD_SHA2: "${GRAYLOG_ROOT_PASSWORD_SHA2:?Please configure GRAYLOG_ROOT_PASSWORD_SHA2 in the .env file}"
       GRAYLOG_DATANODE_MONGODB_URI: "mongodb://mongodb:27017/graylog"
@@ -42,6 +43,7 @@ services:
     entrypoint: "/usr/bin/tini --  /docker-entrypoint.sh"
     environment:
       GRAYLOG_NODE_ID_FILE: "/usr/share/graylog/data/data/node-id"
+      # GRAYLOG_DATANODE_PASSWORD_SECRET and GRAYLOG_PASSWORD_SECRET MUST be the same value
       GRAYLOG_PASSWORD_SECRET: "${GRAYLOG_PASSWORD_SECRET:?Please configure GRAYLOG_PASSWORD_SECRET in the .env file}"
       GRAYLOG_ROOT_PASSWORD_SHA2: "${GRAYLOG_ROOT_PASSWORD_SHA2:?Please configure GRAYLOG_ROOT_PASSWORD_SHA2 in the .env file}"
       GRAYLOG_HTTP_BIND_ADDRESS: "0.0.0.0:9000"