New appliance: elasticsearch

This is an elasticsearch image/appliance.

appliances/elasticsearch/Makefile

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+ES_HOME ?= /var/lib/elasticsearch
+ES_VER ?= 1.7.1
+ES_TARBALL = elasticsearch-$(ES_VER).tar.gz
+ES_URL = https://download.elastic.co/elasticsearch/elasticsearch/$(ES_TARBALL)
+
+preinstall:
+
+create_user:
+	-$(inroot) useradd --system \
+		--comment "Elastic Search" \
+		--home-dir=$(ES_HOME) \
+		--create-home \
+		elastic
+
+install_elasticsearch:
+	$(inroot) test -f /usr/portage/distfiles/$(ES_TARBALL) || \
+		wget -P /usr/portage/distfiles $(ES_URL)
+	$(inroot) tar xf /usr/portage/distfiles/$(ES_TARBALL) -C $(ES_HOME)
+	$(inroot) sh -c 'cd $(ES_HOME) && ln -s elasticsearch-$(ES_VER)/* .'
+
+postinstall: elasticsearch.service
+	$(MAKE) create_user
+	$(inroot) rm -rf $(ES_HOME)
+	$(inroot) mkdir -p $(ES_HOME)
+	$(MAKE) install_elasticsearch
+	$(inroot) chown -R elastic:elastic $(ES_HOME)
+	cp elasticsearch.service $(CHROOT)/etc/systemd/system
+	$(inroot) systemctl enable elasticsearch.service
+
+clean:
+

appliances/elasticsearch/elasticsearch.service

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+[Unit]
+Description = ElasticSearch full-text search and analytics engine
+After = network.target
+
+[Service]
+User = elastic
+Group = elastic
+Environment=ES_HOME=/var/lib/elasticsearch
+ExecStart = /var/lib/elasticsearch/bin/elasticsearch
+
+[Install]
+WantedBy = multi-user.target

appliances/elasticsearch/package.keywords

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+sys-kernel/gentoo-sources ~amd64 ~x86

appliances/elasticsearch/package.use

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+app-editors/nano ncurses
+dev-lang/python ssl threads xml
+dev-libs/libpcre cxx
+dev-util/pkgconfig internal-glib
+net-misc/openssh ssl
+net-misc/wget ssl
+sys-apps/hwids udev
+sys-apps/kmod tools
+sys-apps/portage ipc
+sys-auth/pambase nullok sha512
+sys-devel/gcc cxx nptl
+sys-kernel/gentoo-sources symlink

appliances/elasticsearch/world

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+dev-java/icedtea-bin