5e321af2ed
The current DockerFile build an image using td-agent package but it let the service run with the default memory allocator provided by glibc. In high load environments, is highly required to use a customized memory allocator such as Jemalloc. Otherwise the service will face a high memory fragmentation ending up in 'high memory' usage from a monitoring perspective. td-agent package by default install Jemalloc and set the LD_PRELOAD environment variable through it init script, but since the service is launched through Docker the env variable needs to be set manually. After this patch, when running td-agent container image now is possible to see that Jemalloc is used: root@monotop:/proc/18810# cat maps |grep jemall 7f251eddd000-7f251ee1b000 ... /opt/td-agent/embedded/lib/libjemalloc.so.2 7f251ee1b000-7f251f01b000 ... /opt/td-agent/embedded/lib/libjemalloc.so.2 7f251f01b000-7f251f01d000 ... /opt/td-agent/embedded/lib/libjemalloc.so.2 7f251f01d000-7f251f01e000 ... /opt/td-agent/embedded/lib/libjemalloc.so.2 For a reference about the memory usage difference between malloc v/s jemalloc please refer to the following chart: https://goo.gl/dVYTmw Signed-off-by: Eduardo Silva <eduardo@treasure-data.com>
45 lines
1.6 KiB
Docker
45 lines
1.6 KiB
Docker
# Copyright 2016 The Kubernetes Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This Dockerfile will build an image that is configured
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# to run Fluentd with an Elasticsearch plug-in and the
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# provided configuration file.
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# TODO(a-robinson): Use a lighter base image, e.g. some form of busybox.
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# The image acts as an executable for the binary /usr/sbin/td-agent.
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# Note that fluentd is run with root permssion to allow access to
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# log files with root only access under /var/log/containers/*
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# Please see http://docs.fluentd.org/articles/install-by-deb for more
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# information about installing fluentd using deb package.
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FROM gcr.io/google_containers/ubuntu-slim:0.4
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MAINTAINER Alex Robinson "arob@google.com"
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MAINTAINER Jimmi Dyson "jimmidyson@gmail.com"
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# Ensure there are enough file descriptors for running Fluentd.
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RUN ulimit -n 65536
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# Disable prompts from apt.
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ENV DEBIAN_FRONTEND noninteractive
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# Copy the Fluentd configuration file.
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COPY td-agent.conf /etc/td-agent/td-agent.conf
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COPY build.sh /tmp/build.sh
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RUN /tmp/build.sh
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ENV LD_PRELOAD /opt/td-agent/embedded/lib/libjemalloc.so
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# Run the Fluentd service.
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ENTRYPOINT ["td-agent"]
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