ksonnet

Deploy Loki to Kubernetes

Prerequisites

Make sure you have the ksonnet v0.8.0:

$ brew install https://raw.githubusercontent.com/ksonnet/homebrew-tap/82ef24cb7b454d1857db40e38671426c18cd8820/ks.rb
$ brew pin ks
$ ks version
ksonnet version: v0.8.0
jsonnet version: v0.9.5
client-go version: v1.6.8-beta.0+$Format:%h$

In your config repo, if you don't have a ksonnet application, make a new one (will copy credentials from current context):

$ ks init <application name>
$ cd <application name>
$ ks env add loki --namespace=loki

Deploying Promtail to your cluster.

Grab the promtail module using jb:

$ go get -u github.com/jsonnet-bundler/jsonnet-bundler/cmd/jb
$ jb init
$ jb install github.com/grafana/loki/production/ksonnet/promtail

Replace the contents of environments/loki/main.jsonnet with:

local promtail = import 'promtail/promtail.libsonnet';


promtail + {
  _config+:: {
    namespace: 'loki',

    promtail_config+: {
      clients: [
        {
          scheme:: 'https',
          hostname:: 'logs-us-west1.grafana.net',
          username:: 'user-id',
          password:: 'password',
          external_labels: {},
        }
      ],
      container_root_path: '/var/lib/docker',
    },
  },
}

Notice that container_root_path is your own data root for docker daemon, use docker info | grep "Root Dir" to get it.

Then do ks show loki to see the manifests that'll be deployed to your cluster. Apply them using ks apply loki.

Deploying Loki to your cluster.

If you want to further also deploy the server to the cluster, then run the following to install the module:

jb install github.com/grafana/loki/production/ksonnet/loki

Be sure to replace the username, password and the relevant htpasswd contents. Replace the contents of environments/loki/main.jsonnet with:

local gateway = import 'loki/gateway.libsonnet';
local loki = import 'loki/loki.libsonnet';
local promtail = import 'promtail/promtail.libsonnet';

loki + promtail + gateway {
  _config+:: {
    namespace: 'loki',
    htpasswd_contents: 'loki:$apr1$H4yGiGNg$ssl5/NymaGFRUvxIV1Nyr.',


    promtail_config: {
      scheme: 'http',
      hostname: 'gateway.%(namespace)s.svc' % $._config,
      username: 'loki',
      password: 'password',
      container_root_path: '/var/lib/docker',
    },
    replication_factor: 3,
    consul_replicas: 1,
  },
}

Notice that container_root_path is your own data root for docker daemon, use docker info | grep "Root Dir" to get it.

Do ks show loki to see the manifests being deployed to the cluster. Finally ks apply loki to deploy the server components to your cluster.