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min-masters strategy"
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It turns out that reducing number of rabbitmq queues in cluster
significantly improves performance of cluster especially in the case of
failover recovery time. Right now the cluster uses ha-all mode for rabbitmq
queues.
It is best to change this to "ha-exactly" mode and reduce the number
of queue copies to ceil(N/2) where N is number of controllers in the
cluster - so in typical scenario of 3 controller It would be 2 by
default.
It does not make much sense to keep the copies of queues over whole
cluster since if the quorum of nodes is lost then the rest of cluster
nodes will be stopped anyway. We let the user override this with a
parameter.
I.e. for a 3 node controlplane cluster we will go from this:
pcs resource show rabbitmq
Resource: rabbitmq (class=ocf provider=heartbeat type=rabbitmq-cluster)
Attributes: set_policy="ha-all ^(?!amq\.).* {"ha-mode":"all"}"
To this:
pcs resource show rabbitmq
Resource: rabbitmq (class=ocf provider=heartbeat type=rabbitmq-cluster)
Attributes: set_policy="ha-all ^(?!amq\.).* {"ha-mode":"exactly","ha-params":2}"
According to Marin Krcmarik's testing recovery time from failure was
reduced significantly.
Partial-Bug: #1628998
Change-Id: Iace6daf27a76cb8ef1050ada0de7ff1f530916c6
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strategy
It may happen that one of the controllers may become unavailable and
Queue Masters will be located on available controllers during queue
declarations. Once a lost controller will be become available masters of
newly declared queues are not placed with priority to such controller
with obviously lower number of queue masters and thus the distribution
may be unbalanced and one of the controllers may become under
significantly higher load in some circumstances of multiple fail-overs.
With rabbit 3.6.0 rabbitmq introduced a new HA feature of Queue masters
distribution - one of the strategies is min-masters, which picks the
node hosting the minimum number of masters.
One of the ways how to turn such min-masters strategy on is by adding
following into configuration file - rabbitmq.config
{rabbit,[ ..
{queue_master_locator, <<"min-masters">>},
.. ]},
Change-Id: I61bcab0e93027282b62f2a97bec87cbb0a6e6551
Closes-Bug: #1629010
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Currently in puppet/services/rabbitmq.yaml we hardcode the thread pool
size to 30 (via the +A30 snippet):
rabbitmq_environment:
RABBITMQ_SERVER_ERL_ARGS: '"+K true +A30 +P 1048576 -kernel inet_default_connect_options [{nodelay,true},{raw,6,18,<<5000:64/native>>}] -kernel inet_default_listen_options [{raw,6,18,<<5000:64/native>>}]"'
Upstream rabbit has gained the ability to dynamically configure the
number of threads since 3.6.2 via the following commit:
https://github.com/rabbitmq/rabbitmq-server/commit/41ce5ad808863944cd6d62ce7f7e2271f1010582
Given that the default was hardcoded in rabbit from at least 3.4.0 up
until 3.6.2 (see LP bug associated to this commit), we can actually
remove this hardcoded value as it overrides a sane default.
Before the change:
/usr/lib64/erlang/erts-7.3.1/bin/beam.smp -W w -A 64 -K true -A30 -P 1048576 ...
After the change:
/usr/lib64/erlang/erts-7.3.1/bin/beam.smp -W w -A 64 -K true -P 1048576 ...
So effectively with this change we will have the following:
- With older rabbitmq versions we keep the +A30 default
- With rabbitmq versions >= 3.6.2 the thread number is dynamically
computed to nr_cpus * 16
Change-Id: I8d30c7d141c29fcc439d40fc767498520be7966e
Closes-Bug: #1625486
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Currently RabbitMQ cluster uses a predefined port 35672 for clustering.
This port belongs to so-called ephemeral ports range.
Ephemeral ports are the ports kernel assings to application if it
doesn't specify which port to open. So there is a small chance that this
application being started before RabbitMQ itself could grab this port.
While rather unlikely we did see this happen.
Selinux change should already be in place. On my Centos 7 we have:
rabbitmq_port_t tcp 25672
corenet_tcp_bind_rabbitmq_port(rabbitmq_t)
corenet_tcp_connect_rabbitmq_port(rabbitmq_t)
First noted via:
https://bugzilla.redhat.com/show_bug.cgi?id=1357522
Closes-Bug: #1623818
Depends-On: I0bcd0d063a7a766483426fdd5ea81cbe1dfaa348
Change-Id: I995bd96c2a17614e954ea5bbae4d58998ef420dc
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- adds possibility to install sensu-client on all nodes
- each composable service has it's own subscription
Co-Authored-By: Emilien Macchi <emilien@redhat.com>
Co-Authored-By: Michele Baldessari <michele@redhat.com>
Implements: blueprint tripleo-opstools-availability-monitoring
Change-Id: I6a215763fd0f0015285b3573305d18d0f56c7770
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This moves the config settings out of controller.yaml for RabbitMQ
and into puppet/services/rabbitmq.yaml.
Related-Bug: #1604414
Change-Id: I6b3d71653fb91b89b85dae7df4088afff22b71ac
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This patch adds a new DefaultPasswords parameter to
composable services. This is needed to help provide
access to top level password resources that overcloud.yaml
currently manages (passwords for Rabbit, Mysql, etc.).
Moving the RandomString resources into composable services
would cause them to regenerate within the stack. With this
approach we can leave them where they are while we deprecate
the top level mechanism and move the code that uses the
passwords into the composable services.
Change-Id: I4f21603c58a169a093962594e860933306879e3f
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This will be needed to pick the network where the service has
to bind to from within the service template.
Change-Id: I52652e1ad8c7b360efd2c7af199e35932aaaea8c
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Migrate puppet/hieradata/*.yaml parameters to puppet/services/*.yaml
except for some services that are not composable yet.
Co-Authored-By: Juan Antonio Osorio Robles <jaosorior@redhat.com>
Change-Id: I7e5f8b18ee9aa63a1dffc6facaf88315b07d5fd7
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Split out the firewall rules in puppet/hieradata/controller.yaml
into the composable services
Depends-On: Id370362ab57347b75b1ab25afda877885b047263
Change-Id: Icaecab100d3f278035fbbb3facb9bf6c62c76c03
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This patch adds a new service_name section to each composable
service. We now have an explicit unit test check to ensure that
service_name exists in tools/yaml-validate.py.
This patch also wires service_names into hieradata on each
of the roles so that tools can access the deployed services locally
during deployment and upgrades.
Change-Id: I60861c5aa760534db3e314bba16a13b90ea72f0c
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We now allow 65536 open file descriptors to better reflect the
real-world settings of downstream consumers of TripleO.
Change-Id: Ib04ea6afb2da1a9101839d9d70bc8891d69700ec
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By passing the MysqlVirtualIP via the EndpointMap we won't need it
to be provided as a parameter to the services.
This follows what is already happening for the glance registry
service with I9186e56cd4746a60e65dc5ac12e6595ac56505f0.
Change-Id: Iad2ab389bf64d0fc8b06eb0e7d29b5370ff27dff
Co-Authored-By: Juan Antonio Osorio Robles <jaosorior@redhat.com>
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Change the way to implement RabbitMQ, as a composable role.
Implements: blueprint refactor-puppet-manifests
Change-Id: I5fed5c437ad492af75791a9163f99ae292f58895
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