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Use of the admin APIs to modify logging temporarily has a rather serious
deficiency when the daemon whose config is being changed is using
auto-shutdown (default with socket-activated deployments) as the
configuration is discarded if there is no client or VM/other object
blocking auto shutdown.
This API allows users to disable/postpone shutdown timeout so that the
configuration doesn't change under their hands.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
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The server needs to use CA certificate, CRL, server certificate/key to
complete the TLS handshake. If these files change, we needed to restart
libvirtd for them to take effect. This API can update the TLS context
*ONLINE* without restarting libvirtd.
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Zhang Bo <oscar.zhangbo@huawei.com>
Signed-off-by: Wu Qingliang <wuqingliang4@huawei.com>
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The VIR_TYPED_PARAM_* enum fields are defined in libvirt-common.h, not
in the remote protcol, so shouldn't be part of the protocol structs
output check. This avoids similar problems hitting when we add use of
glib, which has other such anonymous enums.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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Enable libvirt users to modify logging filters of a daemon from outside.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Enable libvirt users to modify daemon's logging output settings from outside.
If either an empty string or NULL is passed, a default logging output will be
used the same way as it would be in case writing an empty string to the
libvirtd.conf
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Enable libvirt users to query logging filter settings.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Enable libvirt users to query logging output settings.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Opposite operation to virAdmServerGetClientLimits. Understandably though,
setting values for current number of clients connected or still waiting
for authentication does not make sense, since changes to these values are event
dependent, i.e. a client connects - counter is increased. Thus only the limits
to maximum clients connected and waiting for authentication can be set. Should
a request for other controls to be set arrive (provided such a setting will
be first introduced to the config), the set of configuration controls can be
later expanded (thanks to typed params). This patch also introduces a
constraint that the maximum number of clients waiting for authentication has to
be less than the overall maximum number of clients connected and any attempt to
violate this constraint will be denied.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Enable retrieval of the number of maximum clients connected to all sockets
combined, as well as the number of maximum clients waiting for authentication,
in order to be successfully connected. These are the attributes configurable
through libvirtd.conf, however, it could be handy to not only know values for
these limits, but also the values for the current number of clients
connected and number of clients currently waiting for authentication which are
changing dynamically. This API does both, retrieves the limits as well as the
current dynamic values.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Once we're able to list and identify all clients connected to a specific
server, we can then support force-closing a connection. This patch introduces
a simple API calling virNetServerClientClose on a specific client, which
can be later extended easily, e.g. by sending an event once the client is
disconnected successfully.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Expose a public API to retrieve some identity and connection information about
a client connected to the specified server on daemon. The identity info
retrieved is mostly connection transport dependent, i.e. there won't be any
socket address returned for a local (UNIX socket) connection, while on the
other hand, when connected through TLS or unencrypted TCP, obviously no UNIX
process identification will be present in the returned data. All supported
values that can be returned in typed params are exposed and documented in
include/libvirt/libvirt-admin.h
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Just like with server-related APIs, before any of client-based APIs can be
called, a reference to a client-side client object needs to be obtained. For
this purpose, a lookup method should exist. Apart from the client retrieval
logic, a new error code for non-existent client had to be added as well.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Finally add public method to retrieve the list of currently connected clients
to a given server.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Besides ID, the object also stores static data like connection transport and
connection timestamp, since once obtained a list of all clients connected to a
server, from user's perspective, it would be nice to know whether a given
client is remote or local only and when did it connect to the daemon.
Along with the object introduction, all necessary client-side methods necessary
to work with the object are added as well.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Since threadpool increments the current number of threads according to current
load, i.e. how many jobs are waiting in the queue. The count however, is
constrained by max and min limits of workers. The logic of this new API works
like this:
1) setting the minimum
a) When the limit is increased, depending on the current number of
threads, new threads are possibly spawned if the current number of
threads is less than the new minimum limit
b) Decreasing the minimum limit has no possible effect on the current
number of threads
2) setting the maximum
a) Icreasing the maximum limit has no immediate effect on the current
number of threads, it only allows the threadpool to spawn more
threads when new jobs, that would otherwise end up queued, arrive.
b) Decreasing the maximum limit may affect the current number of
threads, if the current number of threads is less than the new
maximum limit. Since there may be some ongoing time-consuming jobs
that would effectively block this API from killing any threads.
Therefore, this API is asynchronous with best-effort execution,
i.e. the necessary number of workers will be terminated once they
finish their previous job, unless other workers had already
terminated, decreasing the limit to the requested value.
3) setting priority workers
- both increase and decrease in count of these workers have an
immediate impact on the current number of workers, new ones will be
spawned or some of them get terminated respectively.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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New API to retrieve current server workerpool specs. Since it uses typed
parameters, more specs to retrieve can be further included in the pool of
supported ones.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Make all relevant changes to admin protocol, in order to achieve $(subj)
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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It does not have a suffix ByName because there are no other means of
looking up the server and since the name is known, this should be the
preferred one.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
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This API is merely a convenience API, i.e. when managing clients connected to
daemon's servers, we should know (convenience) which server the specific client
is connected to. This implies a client-side representation of a server along
with a basic API to let the administrating client know what servers are actually
available on the daemon.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
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This is the key structure of all management operations performed on the
daemon/clients. An admin client needs to be able to identify
another client (either admin or non-privileged client) to perform an
action on it. This identification includes a server the client is
connected to, thus a client-side representation of a server is needed.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
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Commmit df8192aa introduced admin related rename and some minor
(caused by automated approach, aka sed) and some more severe isues along with
it. First reason to revert is the inconsistency with libvirt library.
Although we deal with the daemon directly rather than with a specific
hypervisor, we still do have a connection. That being said, contributors might
get under the impression that AdmDaemonNew would spawn/start a new daemon
(since it's admin API, why not...), or AdmDaemonClose would do the exact
opposite or they might expect DaemonIsAlive report overall status of the daemon
which definitely isn't the case.
The second reason to revert this patch is renaming virt-admin client. The
client tool does not necessarily have to reflect the names of the API's it's
using in his internals. An example would be 's/vshAdmConnect/vshAdmDaemon'
where noone can be certain of what the latter function really does. The former
is quite expressive about some connection magic it performs, but the latter does
not say anything, especially when vshAdmReconnect and vshAdmDisconnect were
left untouched.
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virAdmConnect was named after virConnect, but after some discussions,
most of the APIs called will be working with remote daemon and starting
them virAdmDaemon will make more sense. Only possibly controversal name
is CloseCallback (de)registration, and connecting to the daemon (which
will still be Open/Close), but even this makes sense if one thinks about
the daemon being opened and closed, e.g. as file, etc.
This way all the APIs working with the daemon will start with
virAdmDaemon prefix, they will accept virAdmDaemonPtr as first parameter
and that will better suit with other namings as well (virDomain*,
virAdmServer*, etc.).
Because in virt-admin, the connection name does not refer to a struct
that would have a connect in its name, also adjust 'connname' in
clients. And because it is not used anywhere in the vsh code, move it
from there into each client.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
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Introduce a new API to get libvirt version. It is worth noting, that
libvirt-admin and libvirt share the same version number. Unfortunately,
our existing API isn't generic enough to be used with virAdmConnectPtr
as well. Also this patch wires up this API to the virt-admin client
as a generic cmdVersion command.
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This reverts commit 5792fabb7b712749147e9d03348c798dc1943651.
I mistakenly pushed it along with the Admin API series.
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Just one of the simplest functions that returns string "Clients: X"
where X is the number of connected clients to daemon's first
subserver (the original one), so it can be tested using virsh, ipython,
etc.
The subserver is gathered by incrementing its reference
counter (similarly to getting qemu capabilities), so there is no
deadlock with admin subserver in this API.
Here you can see how functions should be named in the client (virAdm*)
and server (adm*).
There is also a parameter @flags that must be 0, which helps testing
proper error propagation into the client.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
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For now there are only CONNECT_OPEN and CONNECT_CLOSE procedures.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
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