diff --git a/Puppetfile b/Puppetfile
--- a/Puppetfile
+++ b/Puppetfile
@@ -207,6 +207,10 @@
     :git => 'https://forge.softwareheritage.org/source/puppet-puppetlabs-vcsrepo',
     :ref => 'v5.0.0'
 
+mod 'zfs_core',
+    :git => 'https://forge.softwareheritage.org/source/puppet-puppetlabs-zfs_core',
+    :ref => '1.0.0'  # Higher versions not compatible with puppet < 6.0
+
 mod 'zookeeper',
     :git => 'https://forge.softwareheritage.org/source/puppet-deric-zookeeper',
     :ref => 'v1.2.1'
diff --git a/data/hostname/elastic-worker0.internal.staging.swh.network.yaml b/data/hostname/elastic-worker0.internal.staging.swh.network.yaml
new file mode 100644
--- /dev/null
+++ b/data/hostname/elastic-worker0.internal.staging.swh.network.yaml
@@ -0,0 +1,6 @@
+# enable contrib and non-free apt sources
+swh::apt_config::enable_non_free: true
+# which allows the following dependency to be installed
+packages:
+  # install zfs
+  - zfs-dkms
diff --git a/manifests/site.pp b/manifests/site.pp
--- a/manifests/site.pp
+++ b/manifests/site.pp
@@ -228,6 +228,11 @@
   include role::swh_maven_index_exporter
 }
 
+node /^elastic-worker\d+\.internal\.staging\.swh\.network$/ {
+  include role::swh_worker_elastic
+}
+
+
 node default {
   include role::swh_base
 }
diff --git a/site-modules/profile/manifests/zfs/docker.pp b/site-modules/profile/manifests/zfs/docker.pp
new file mode 100644
--- /dev/null
+++ b/site-modules/profile/manifests/zfs/docker.pp
@@ -0,0 +1,25 @@
+# Handle /var/lib/docker partition as zfs mountpoint
+# To reduce the disk usage
+class profile::zfs::docker {
+  # zpool create -f data /dev/vdb
+  zpool {'data':
+    ensure => 'present',
+    disk   => 'vdb',
+  }
+
+  # zfs create -o mountpoint=/var/lib/docker \
+  #   -o atime=off \
+  #   -o relatime=on \  # not supported by the following
+  #   -o compression=zstd \
+  #   data/docker
+
+  zfs { 'data/docker':
+    ensure      => present,
+    atime       => 'off',
+    compression => 'zstd',
+    mountpoint  => '/var/lib/docker',
+    require     => Zpool['data'],
+    notify      => Service['docker'],
+  }
+  -> Package['docker']
+}
diff --git a/site-modules/role/manifests/swh_worker_elastic.pp b/site-modules/role/manifests/swh_worker_elastic.pp
new file mode 100644
--- /dev/null
+++ b/site-modules/role/manifests/swh_worker_elastic.pp
@@ -0,0 +1,4 @@
+class role::swh_worker_elastic inherits role::swh_base {
+  include profile::docker
+  include profile::zfs::docker
+}