Graphite cluster backend with ClickHouse support

Gray components are optional or alternative

• graphite-web 0.9.15
• graphite-web master: unknown
• carbonzipper: supported, untested
• carbonapi: unknown

Required golang 1.7+

# build binary
git clone https://github.com/lomik/graphite-clickhouse.git
cd graphite-clickhouse
make submodules
make

1. Setup Yandex ClickHouse and carbon-clickhouse
2. Setup and configure graphite-clickhouse
3. Add graphite-clickhouse host:port to graphite-web CLUSTER_SERVERS

Create /etc/graphite-clickhouse/rollup.xml with same content as for ClickHouse. Short sample:

<graphite_rollup>
        <default>
                <function>avg</function>
                <retention>
                        <age>0</age>
                        <precision>60</precision>
                </retention>
                <retention>
                        <age>2592000</age>
                        <precision>3600</precision>
                </retention>
        </default>
</graphite_rollup>

For complex clickhouse queries you might need to increase default query_max_size. To do that add following line to /etc/clickhouse-server/users.xml for the user you are using:

<!-- Default is 262144 -->
<max_query_size>10485760</max_query_size>

Create /etc/graphite-clickhouse/graphite-clickhouse.conf

[common]
listen = ":9090"
max-cpu = 1

[clickhouse]
# You can add user/password (http://user:password@localhost:8123) and any clickhouse options (GET-parameters) to url
# It is recommended to create read-only user 
url = "http://localhost:8123"
data-table = "graphite"
tree-table = "graphite_tree"
rollup-conf = "/etc/graphite-clickhouse/rollup.xml"
# Add extra prefix (directory in graphite) for all metrics
extra-prefix = ""
data-timeout = "1m0s"
tree-timeout = "1m0s"

[logging]
file = "/var/log/graphite-clickhouse/graphite-clickhouse.log"
level = "info"

By default graphite-web won't connect to CLUSTER_SERVER on localhost. Cheat:

class ForceLocal(str):
    def split(self, *args, **kwargs):
        return ["8.8.8.8", "8080"]

CLUSTER_SERVERS = [ForceLocal("127.0.0.1:9090")]