Recursor: try to document how to handle systemd private tmp

diff --git a/pdns/recursordist/docs/manpages/rec_control.1.rst b/pdns/recursordist/docs/manpages/rec_control.1.rst
index 3692416fd508e0d35615daf2b71e8003d3c7e83d..a54af53ca4c973a165ec51108c0c013dfd50f7bc 100644 (file)
--- a/pdns/recursordist/docs/manpages/rec_control.1.rst
+++ b/pdns/recursordist/docs/manpages/rec_control.1.rst
@@ -74,23 +74,55 @@ dump-cache *FILENAME*
     also dumped to the same file. The per-thread positive and negative cache
     dumps are separated with an appropriate comment.
 
+    .. note::
+
+      :program:`pdns_recursor` often runs in a chroot. You can
+      retrieve the file using::
+
+        rec_control dump-cache /tmp/file
+        mv /proc/$(pidof pdns_recursor)/root/tmp/file /tmp/filename
+
 dump-edns *FILENAME*
     Dumps the EDNS status to the filename mentioned. This file should not exist
     already, PowerDNS will refuse to overwrite it. While dumping, the recursor
     will not answer questions.
 
+    .. note::
+
+      :program:`pdns_recursor` often runs in a chroot. You can
+      retrieve the file using::
+
+        rec_control dump-edns /tmp/file
+        mv /proc/$(pidof pdns_recursor)/root/tmp/file /tmp/filename
+
 dump-nsspeeds *FILENAME*
     Dumps the nameserver speed statistics to the *FILENAME* mentioned. This
     file should not exist already, PowerDNS will refuse to overwrite it. While
     dumping, the recursor will not answer questions. Statistics are kept per
     thread, and the dumps end up in the same file.
 
+    .. note::
+
+      :program:`pdns_recursor` often runs in a chroot. You can
+      retrieve the file using::
+
+        rec_control dump-nsspeeds /tmp/file
+        mv /proc/$(pidof pdns_recursor)/root/tmp/file /tmp/filename
+
 dump-rpz *ZONE NAME* *FILE NAME*
     Dumps the content of the RPZ zone named *ZONE NAME* to the *FILENAME*
     mentioned. This file should not exist already, PowerDNS will refuse to
     overwrite it otherwise. While dumping, the recursor will not answer
     questions.
 
+    .. note::
+
+      :program:`pdns_recursor` often runs in a chroot. You can
+      retrieve the file using::
+
+        rec_control dump-rpz ZONE_NAME /tmp/file
+        mv /proc/$(pidof pdns_recursor)/root/tmp/file /tmp/filename
+
 get *STATISTIC* [*STATISTIC*]...
     Retrieve a statistic. For items that can be queried, see
     :doc:`../metrics`