And provide unittests for them

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

To add job priorities, the worker pool underlying the job queue must
support priorities per task. This patch adds them to the worker pool.

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

This patch adds an initial implementation of a lock monitor, accessible
for the user through “gnt-debug locks”. It currently shows all resource
locks: BGL, nodes and instances. Config and job queue locks could be
shown too, but wouldn't be of much help.  The current owner(s) and mode
are also shown.

Showing pending acquires will require further changes on the SharedLock
internals and is not yet implemented.

Example output:
$ gnt-debug locks -o name,mode,owner
Name            Mode      Owner
BGL/BGL         shared    JobQueue19/Job147
instances/inst1 exclusive JobQueue19/Job147
instances/inst2 -         -
instances/inst3 -         -
instances/inst4 -         -
nodes/node1     exclusive JobQueue19/Job147
nodes/node2     exclusive JobQueue19/Job147

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

With this patch, the task name is added to the thread name and will show up in
logs. Log messages from jobs will look like “pid=578/JobQueue14/Job13 mcpu:289
DEBUG LU locks acquired/cluster/BGL/shared”.

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

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

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

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

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

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

By doing this we delegate the task of finding the correct address family
to the FormatAddress method.

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

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

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

This patches changes the StartMaster method to consult the cluster
primary ip version when deciding whether to use arping or ndisc6 after
activating the master ip.

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

This patch restores the behaviour of Hostname (previously known as
HostInfo) to always use fqdn. This was broken due to the fact that the
now used getaddrinfo does not return an fqdn in contrast to
gethostbyname_ex().

This patch adds Hostname.GetFqdn() which is always used when
initializing a Hostname object.

A problem this solves is when adding a node and not using its fqdn, node
verify won't complain.

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

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

Currently cli.py unconditionally adds the dry-run option. This patch
disables this, and exports dry-run as a normal option.

The other alternative I tried to implement (adding a new fake option for
disabling the auto-add per individual command) would require changes in
more places, as the list of options is no longer a homogeneous list.

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

With the job queue changes for Ganeti 2.2, watched and queried jobs are
loaded directly from disk, rendering the in-memory “lock_status” field
useless. Writing it to disk would be possible, but has a huge cost at
runtime (when tested, processing 1'000 opcodes involved 4'000 additional
writes to job files, even with replication turned off).

Using an additional in-memory dictionary to just manage this field turned
out to be a complicated task due to the necessary locking.

The plan is to introduce a more generic lock debugging mechanism in the
near future. Hence the decision is to remove this field now instead of
spending a lot of time to make it working again.

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

This avoids duplicate effort and has been a TODO for a long time.

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

Currently on non-mirrored disk templates the secondary node is ignored
silently. This patch adds a check for this case, and warns the user
should this be happening. This solves issue 113.

The patch also moves a prereq check to an argument check. This is ok
because the iallocator framework already checks it has a secondary node,
when it needs one.

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

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

This is needed so we can run external scripts asking for password and such
to run interactive. Downside is that we can't get the output of the program
but we can still use the exit code.

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

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

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

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

We expose the ip_version (4, 6) to the external interface and internally
we convert it to ip_family (AF_INET=2, AF_INET6=10). This makes the code
more concise as all functions deal with family rather than version.

This patch does not yet expose this parameter via gnt-cluster, but only uses
the constant IP4_VERSION. This will be enabled in a future patch.

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

These missing changes were initially agreed upon but then forgotten.
First, we move the valid name regex to the class-level such that it
won't be compiled for every invocation of GetIP() and we wrap the result
of getaddrinfo() into a try/except to catch a possible IndexError.

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

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

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

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

Test multiple opcodes, also with failure.

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

When an opcode fails, the job queue would leave following opcodes as “queued”,
which can be quite confusing. With this patch, they're all marked as failed and
assertions are added to check this.

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

This is a simplified version of a patch I sent earlier to make sure the job
file is only written once with a finalized status.

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

This patch moves the FormatAddress helper function from daemon.py to
netutils.py. This enables its use in http.client as well as in
rapi.client. Furthermore this adds functionality to format IPv6
addresses according to RFC 3986.

It is required for use of literal IPv6 addresses in URLs in pycurl.
For some reason it worked also without the bracketing ("["<address>"]"),
but we do not want to rely on that.

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

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

In light of the upcoming IPv6 support, this patch enables the rpc.Client
to always use a node's address to connect to it. This is necessary as we
do not want to rely on name resolution to connect to the correct IP
address on a dual-stack machine.

Signed-off-by: Manuel Franceschini <livewire@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

This change is needed as we will need to read the primary ip version
cluster parameter before we start the node daemon. The reason is that we
need to know in advance if we bind to the IPv4 or IPv6 any address.

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

This patch unifies the netutils functions dealing with IP addresses to
three classes:
- IPAddress: Common IP address functionality
- IPv4Address: IPv4 specific functionality
- IPv6address: IPv6-specific functionality

Furthermore it adds methods to check whether an address is a loopback
address, replacing the .startswith("127") for IPv4 and adding IPv6
support.

It also provides the basis for future IPv6 address handling. Methods to
convert IP strings to their corresponding interger values will allow to
canonicalize IPv6 addresses.

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

We can also check when the lock status is updated. This will
improve job cancelling.

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