This way, it can be reused in the Haskell code too.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

If the cluster version is upgraded from a version before commit
5a8648eb to a version after that commit,
the master startup will fail because the ssconf file with the master
netmask will not be present, and it is read during the master voting
process.

This patch fixes this bug, making ssconf.GetMasterNetmask return a
default netmask value, and also corrects the docstring of this method.

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

Add the master_netmask cluster parameter, that represents the netmask of
the master IP, encoded as a CIDR suffix.

This parameter can be set via the --master-netmask of gnt-cluster init
and gnt-cluster modify. The default behaviour is to be consistent with
the old default (/32 for IPv4 and /128 for IPv6).

Signed-off-by: Andrea Spadaccini <spadaccio@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

The files should be 0444, not 0400. This was a regression from 2.4.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

s/'/"/ in (hopefully) the right places.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

This patch introduces core file storage support, consisting of the following:

A configure-time switch for enabling/disabling shared file storage
support and controlling the shared file storage location:
--with-shared-file-storage-dir=.  Shared file storage configuration is then
available as _autoconf.ENABLE_SHARED_FILE_STORAGE and
_autoconf.SHARED_FILE_STORAGE_DIR and there is a cluster-wide ssconf
key named "shared_file_storage_dir" for changing the file location.

A new disk template named "sharedfile" (DT_SHARED_FILE), using
ganeti.bdev.FileStorage.

Auxiliary functions in lib/config.py to handle shared file storage.

Signed-off-by: Apollon Oikonomopoulos <apollon@noc.grnet.gr>
[iustin@google.com: small style fixes]
Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

This patch adds an optional default parameter to SimpleStore._ReadFile. This
can be used to default the return value of this method in case the ssconf file
is not present.

In this particular case it is used to return AF_INET in case
ssconf_primary_ip_familiy is absent. This is the case when upgrading
from 2.2 -> 2.3. This is intended behaviour as it is suboptimal to copy
the ssconf file manually to the nodes during an upgrade using
cfgupgrade.

In the concrete case of an upgrade from 2.2 -> 2.3 cfgupgrade will just
add the primary_ip_family parameter to the cluster configuration and the
daemons will start with default family AF_INET. This is perfectly fine,
since there is no AF_INET6 2.2 clusters. After that, the admin is
required (as in an major upgrade) to run 'gnt-cluster redist-conf' which
will write ssconf_primary_ip_family on all nodes.

Signed-off-by: Manuel Franceschini <livewire@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Since this parameter will be used on all daemon startups, it needs to be
available on all nodes. This is achieved by querying it via ssconf. This
patch additionally adds a getter method to readily retrieve the primary
ip family from a ConfigWriter object.

This patch also disables the 'R0904: Too many public methods' pylint
warning, as it crosses the 50 methods limit.

Signed-off-by: Manuel Franceschini <livewire@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

This patch enables IPv6 name resolution by using socket.getaddrinfo
instead of socket.gethostbyname_ex.

It renames the HostInfo class to Hostname and unifies its use throughout
the code. This is achieved by using static calls where no object is
needed and removes some obsolete code.

For now, we just resolve to IPv4 addresses, but this will change once it
is needed.

Signed-off-by: Manuel Franceschini <livewire@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

This patch moves network utility functions to a dedicated module.

Signed-off-by: Manuel Franceschini <livewire@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Since we impose a maximum limit when reading ssconf files, let's error
out when trying to write them too big, so we don't pretend everything is
ok, and make mistakes when we actually read partial files.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

This function is not used anymore, so there's no point in keeping it
around.

This reverts commit 3f71b464, apart from
a one empty line conflict in ssconf.py

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Signed-off-by: Balazs Lecz <leczb@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Signed-off-by: Balazs Lecz <leczb@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

This can be used by nodes to know which hypervisors they are supposed to
support.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: René Nussbaumer <rn@google.com>

All non-oneliner functions, after this patch, have their docstring.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

This way we can re-use file objects opened in other places. Also add more
unittests.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

A newer version of pylint, more warnings…

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

We were already half-doing it, but this completes the process.

1) We don't maintain a list of ips or an ip->instance map
2) We add a new link,ip->instance map (link->ips list we had)
3) We add the link parameter to GetInstanceByIp (making it
   GetInstanceByLinkIp)
4) We change the GetInstanceByIp caller to pass None as link
   (thus for now using only the default link)

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

GetDefaultNicParams returns the default nic parameters.
GetDefaultNicLink returns the default nic link.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Found using pylint and epydoc.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

The query now accepts a link parameter.

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

Extend confd to answer queries about instances IPs.

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Extend confd to answer queries about nodes primary IPs and master candidates
primary IPs.

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Luca Bigliardi <shammash@google.com>

We haven't had that config file entry for a while.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Also, catch EnvironmentError, rather than IOError, when trying to read
the file.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Add the following functions to SimpleConfigReader:
GetInstanceByIp, nic ip -> instance name
GetNodePrimaryIp, node name -> node primary ip
GetInstancePrimaryNode, instance name -> primary node

For the first one we precalculate the _ip_to_instance, so we don't have
to loop over all instances for each query.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Adding a way to retrieve the three node status flags, all in one go,
from SimpleConfigReader. Non-existing nodes are handled by returning
"None".

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

If for some reason we try to call Reload twice but the config file
hasn't changed, we don't want to load it again. Use stat() on the file
to cheaply avoid that situation.

We also return a boolean value, according to whether we have reloaded
the config or not.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Since we use it also to load the config file initially we rename the
Reload function to _Load. Then we re-export it as Reload to clients
(since for them it's a reload).

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

GetConfigSerialNo and GetClusterSerialNo return respectively the serial
number for the config and for the cluster object.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Rather than initializing the config statically at class creation time,
we load it every time Reload() is called.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Handling both IOErrors and ValueErrors (thrown by the simplejson loader)

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

This function checks that the current node is a master candidate, and
terminates otherwise. It will be used upon ganeti-confd startup.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

This will be used when querying confd, in order not to rely on DNS being
available.

Signed-off-by: Luca Bigliardi <shammash@google.com>
Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

Having a list of primary/secondary IPs of all the nodes in ssconf can be useful
for scripts/hooks which need to automatically configure network properties for
the whole cluster (e.g.: ipsec/netfilter rules) without relying on a
working DNS.

Signed-off-by: Luca Bigliardi <shammash@google.com>
Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

InitConfig currently creates the cluster config_data, then puts it into
a dict, passes it to SimpleConfigWriter to load it from a dict (which
just reuses the dict value) and then saves it. The SimpleConfigWriter is
then returned, but ignored. With this patch we just write out the
config_data at InitConfig time, and thus can remove SimpleConfigWriter
altogether. The now unused SimpleConfigReader.FromDict is also gone.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>