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Tune dnsmasq/kubedns limits, replicas, logging

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* Add dns_replicas, dns_memory/cpu_limit/requests vars for
dns related apps.
* When kube_log_level=4, log dnsmasq queries as well.
* Add log level control for skydns (part of kubedns app).
* Add limits/requests vars for dnsmasq (part of kubedns app) and
  dnsmasq daemon set.
* Drop string defaults for kube_log_level as it is int and
  is defined in the global vars as well.
* Add docs

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
This commit is contained in:
Bogdan Dobrelya
2016-11-25 11:33:39 +01:00
parent 6d29a5981c
commit 2d18e19263
11 changed files with 47 additions and 12 deletions
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5
docs/large-deployments.md
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@@ -21,5 +21,10 @@ For a large scaled deployments, consider the following configuration changes:
load on a delegate (the first K8s master node) then retrying failed
push or download operations.
* Tune parameters for DNS related applications (dnsmasq daemon set, kubedns
replication controller). Those are ``dns_replicas``, ``dns_cpu_limit``,
``dns_cpu_requests``, ``dns_memory_limit``, ``dns_memory_requests``.
Please note that limits must always be greater than or equal to requests.
For example, when deploying 200 nodes, you may want to run ansible with
``--forks=50``, ``--timeout=600`` and define the ``retry_stagger: 60``.