assets: Change hostname for AWS nodes in ignition config

Changes the hostname for AWS clusters to the naming scheme preferred by Cloud Controller Manager in order to allow us to set up LoadBalancer services on AWS. Required for #145
kinvolk · Jul 7, 2020 · 7b43184 · 7b43184
1 parent e41922b
commit 7b43184
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Showing 3 changed files with 30 additions and 4 deletions.
diff --git a/assets/lokomotive-kubernetes/aws/flatcar-linux/kubernetes/cl/controller.yaml.tmpl b/assets/lokomotive-kubernetes/aws/flatcar-linux/kubernetes/cl/controller.yaml.tmpl
@@ -1,6 +1,18 @@
 ---
 systemd:
   units:
+    - name: set-hostname.service
+      enable: true
+      contents: |
+        [Unit]
+        Description=Set the hostname programmitcally for the AWS-preferred format
+        After=network.target
+        [Service]
+        Type=oneshot
+        RemainAfterExit=true
+        ExecStart=/bin/sh -c 'hostnamectl set-hostname $(curl -s http://169.254.169.254/latest/meta-data/hostname)'
+        [Install]
+        RequiredBy=kubelet.service
     - name: etcd-member.service
       enable: true
       dropins:
@@ -52,6 +64,7 @@ systemd:
         [Unit]
         Description=Kubelet via Hyperkube
         Wants=rpc-statd.service
+        Wants=set-hostname.service
         [Service]
         ConditionPathExists=/etc/kubernetes/kubeconfig
         EnvironmentFile=/etc/kubernetes/kubelet.env

diff --git a/assets/lokomotive-kubernetes/aws/flatcar-linux/kubernetes/workers/cl/worker.yaml.tmpl b/assets/lokomotive-kubernetes/aws/flatcar-linux/kubernetes/workers/cl/worker.yaml.tmpl
@@ -1,6 +1,18 @@
 ---
 systemd:
   units:
+    - name: set-hostname.service
+      enable: true
+      contents: |
+        [Unit]
+        Description=Set the hostname programmitcally for the AWS-preferred format
+        After=network.target
+        [Service]
+        Type=oneshot
+        RemainAfterExit=true
+        ExecStart=/bin/sh -c 'hostnamectl set-hostname $(curl -s http://169.254.169.254/latest/meta-data/hostname)'
+        [Install]
+        RequiredBy=kubelet.service
     - name: docker.service
       enable: true
     - name: iscsid.service
@@ -27,6 +39,7 @@ systemd:
         [Unit]
         Description=Kubelet via Hyperkube
         Wants=rpc-statd.service
+        Wants=set-hostname.service
         [Service]
         EnvironmentFile=/etc/kubernetes/kubelet.env
         Environment="RKT_RUN_ARGS=--uuid-file-save=/var/cache/kubelet-pod.uuid \