CTDB: Enablement (NFS)

[Rafael David Tinoco]

Initial support enabling CTDB to install/run in Ubuntu Server.

Related bugs:

CTDB port is not aware of Ubuntu-specific NFS Settings
https://bugs.launchpad.net/ubuntu/+source/samba/+bug/722201

ctdb service crashes on start Edit
https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1335540

ctdb cannot create PID file Edit
https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1821775

Package ctdb does not create directories in /var/lib/ctdb
https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1828799

ss seems broken when using multiple filters in the same cmdline
https://bugs.launchpad.net/ubuntu/+source/iproute2/+bug/1831775

Those fixes will allow CTDB to be used to configure a HA NFS SERVER.

Documentation:

https://blueprints.launchpad.net/ubuntu-server-ha/+spec/ctdb-enablement-nfs

[Rafael David Tinoco (rafaeldtinoco)]

Quick issue that might have to do with AES-NI support in my CPU:

during dh_install phase, for samba, I got:

make[1]: Leaving directory '/home/inaddy/work/sources/ubuntu/samba'
   dh_install
dh_install: Cannot find (any matches for) "usr/lib/*/samba/libaesni-intel.so.0" (tried in ., debian/tmp)

dh_install: samba-libs missing files: usr/lib/*/samba/libaesni-intel.so.0
dh_install: missing files, aborting
make: *** [debian/rules:86: binary] Error 25

And I checked upstream, there is a change in changelog:

----

commit 6bb871706c238b77d0064aabf906e22ef6d2aa12
Author: Mathieu Parent <email address hidden>
Date: Mon Oct 8 17:01:13 2018

    Enable --accel-aes=intelaesni on DEB_HOST_ARCH_CPU=amd64 instead of DEB_HOST_ARCH=amd64. This matches samba-libs.install and adds x32

diff --git a/debian/rules b/debian/rules
index 78ba34c16fb..40e1e8ba3ff 100755
--- a/debian/rules
+++ b/debian/rules
@@ -79,7 +79,7 @@ else
                --without-systemd
 endif

-ifeq ($(DEB_HOST_ARCH), amd64)
+ifeq ($(DEB_HOST_ARCH_CPU), amd64)
        conf_args += \
                --accel-aes=intelaesni
 endif

----

I *think* my CPU, being an OLD fashioned AMD FX(tm)-8350 Eight-Core Processor, doesn't support it AES-NI =), and it couldn't find the lib allegedly enabled by dh_configure (--access-aes=intelaesni). I'll workaround this in my merge attempt / SRUs for now, and investigate this later on.

[Rafael David Tinoco (rafaeldtinoco)]

Opened a Debian bug to track all these issues altogether (same thing as I'm doing here in this bug):

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=929931

[Rafael David Tinoco (rafaeldtinoco)]

https://bugzilla.samba.org/show_bug.cgi?id=13984

[Rafael David Tinoco (rafaeldtinoco)]

Alright, the specifications on everything I needed to do, in short terms, is this:

---- DONE

/etc/ctdb/statd-callout:

 - place non-upstream (?) patch (DEP3) inside debian/patches(quilt)

---- DONE

/etc/ctdb/events/legacy/60.nfs.script: 1: eval: rpc.rquotad: not found

legacy/60.nfs.script needs rpc.rquotad.

ctdb needs to depend on:
- nfs-kernel-server
- nfs-common
- quota

---- NO NEED

    ss -tn state established "${_ip_filter} ${_port_filter}" | awk 'NR > 1 {print $4, $3}' | sort >"$_my_connections"

---- EXAMPLE

Example of appendix to /etc/services to enable CTDB NFS HA:

/etc/services: (append)

rpc.nfsd 2049/tcp # RPC nfsd
....

---- EXAMPLE

TODO:
 - provide a /etc/ctdb/nfs-common.example
 - provide instructions to replace /etc/default/nfs-common with the example

---- EXAMPLE

TODO:
 - provide a /etc/ctdb/nfs-kernel-server.example
 - provide instructions to replace /etc/default/nfs-kernel-server with the example

---- EXAMPLE

TODO:
 - provide a /etc/ctdb/98-nfs-static-ports-sysctl.conf.example
 - provide instructions to place it as /etc/sysctl.d/98-nfs-static-ports.conf

---- DONE

[PATCH] ctdb-scripts: Fix tcp_tw_recycle existence check

https://lists.samba.org/archive/samba-technical/2019-June/133694.html

---- NO NEED

[PATCH] ctdb-scripts: Fix ss syntax in update_tickles()

https://lists.samba.org/archive/samba-technical/2019-June/133701.html

---- DONE:

ctdb cannot create PID file Edit

/var/run/ctdb

https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1821775

---- DONE:

Package ctdb does not create directories in /var/lib/ctdb

/var/lib/ctdb

https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1828799

----