diff --git a/data/hostname/kafka1.internal.softwareheritage.org.yaml b/data/hostname/kafka1.internal.softwareheritage.org.yaml
new file mode 100644
index 00000000..3aeb36ef
--- /dev/null
+++ b/data/hostname/kafka1.internal.softwareheritage.org.yaml
@@ -0,0 +1,9 @@
+---
+backups::exclude:
+  - srv/kafka
+
+nginx::worker_processes: 32
+
+swh::apt_config::enable_non_free: true
+packages:
+  - intel-microcode
diff --git a/data/hostname/kafka2.internal.softwareheritage.org.yaml b/data/hostname/kafka2.internal.softwareheritage.org.yaml
new file mode 100644
index 00000000..3aeb36ef
--- /dev/null
+++ b/data/hostname/kafka2.internal.softwareheritage.org.yaml
@@ -0,0 +1,9 @@
+---
+backups::exclude:
+  - srv/kafka
+
+nginx::worker_processes: 32
+
+swh::apt_config::enable_non_free: true
+packages:
+  - intel-microcode
diff --git a/data/hostname/kafka3.internal.softwareheritage.org.yaml b/data/hostname/kafka3.internal.softwareheritage.org.yaml
new file mode 100644
index 00000000..3aeb36ef
--- /dev/null
+++ b/data/hostname/kafka3.internal.softwareheritage.org.yaml
@@ -0,0 +1,9 @@
+---
+backups::exclude:
+  - srv/kafka
+
+nginx::worker_processes: 32
+
+swh::apt_config::enable_non_free: true
+packages:
+  - intel-microcode
diff --git a/data/hostname/kafka4.internal.softwareheritage.org.yaml b/data/hostname/kafka4.internal.softwareheritage.org.yaml
new file mode 100644
index 00000000..3aeb36ef
--- /dev/null
+++ b/data/hostname/kafka4.internal.softwareheritage.org.yaml
@@ -0,0 +1,9 @@
+---
+backups::exclude:
+  - srv/kafka
+
+nginx::worker_processes: 32
+
+swh::apt_config::enable_non_free: true
+packages:
+  - intel-microcode