Fix nova-compute-ssh init to execute as runAsUser

On _ssh-init.sh.tpl, despite one change the runAsUser for the
nova-compute container on the securityContext, the ssh keys are always
being copied into the 'nova' user's folder. This change fixes it by
getting the correct user defined on the securityContext and copying the
keys to its correct folder.

Signed-off-by: Thiago Brito <thiago.brito@windriver.com>
Change-Id: Ia7883dc4626a295892eb4637ef717b0b1725ac89

nova/Chart.yaml

@@ -14,7 +14,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Nova
 name: nova
-version: 0.2.25
+version: 0.2.26
 home: https://docs.openstack.org/nova/latest/
 icon: https://www.openstack.org/themes/openstack/images/project-mascots/Nova/OpenStack_Project_Nova_vertical.png
 sources:

nova/templates/bin/_ssh-init.sh.tpl

@@ -16,10 +16,13 @@ limitations under the License.
 
 set -ex
 
-mkdir -p ~nova/.ssh
-chown -R nova:nova ~nova/.ssh
+export NOVA_USERNAME=$(id -u ${NOVA_USER_UID} -n)
+export NOVA_USER_HOME=$(eval echo ~${NOVA_USERNAME})
 
-cat > ~nova/.ssh/config <<EOF
+mkdir -p ${NOVA_USER_HOME}/.ssh
+chown -R ${NOVA_USERNAME}:${NOVA_USERNAME} ${NOVA_USER_HOME}/.ssh
+
+cat > ${NOVA_USER_HOME}/.ssh/config <<EOF
 Host *
   StrictHostKeyChecking no
   UserKnownHostsFile /dev/null
@@ -27,5 +30,5 @@ Host *
   IdentitiesOnly yes
 EOF
 
-cp /tmp/nova-ssh/* ~nova/.ssh/
-chmod 600 ~nova/.ssh/id_rsa
+cp /tmp/nova-ssh/* ${NOVA_USER_HOME}/.ssh/
+chmod 600 ${NOVA_USER_HOME}/.ssh/id_rsa

nova/templates/daemonset-compute.yaml

@@ -104,6 +104,7 @@ spec:
               mountPath: /var/lib/nova
             - name: pod-shared
               mountPath: /tmp/pod-shared
+{{ if $mounts_nova_compute.volumeMounts }}{{ toYaml $mounts_nova_compute.volumeMounts | indent 12 }}{{ end }}
         {{- if .Values.conf.ceph.enabled }}
         - name: ceph-perms
 {{ tuple $envAll "nova_compute" | include "helm-toolkit.snippets.image" | indent 10 }}
@@ -119,6 +120,7 @@ spec:
               mountPath: /tmp
             - name: etcceph
               mountPath: /etc/ceph
+{{ if $mounts_nova_compute.volumeMounts }}{{ toYaml $mounts_nova_compute.volumeMounts | indent 12 }}{{ end }}
         {{- if empty .Values.conf.ceph.cinder.keyring }}
         - name: ceph-admin-keyring-placement
 {{ tuple $envAll "nova_compute" | include "helm-toolkit.snippets.image" | indent 10 }}
@@ -141,6 +143,7 @@ spec:
               subPath: key
               readOnly: true
             {{ end }}
+{{ if $mounts_nova_compute.volumeMounts }}{{ toYaml $mounts_nova_compute.volumeMounts | indent 12 }}{{ end }}
         {{ end }}
         - name: ceph-keyring-placement
 {{ tuple $envAll "nova_compute" | include "helm-toolkit.snippets.image" | indent 10 }}
@@ -169,6 +172,7 @@ spec:
               mountPath: /etc/ceph/ceph.conf.template
               subPath: ceph.conf
               readOnly: true
+{{ if $mounts_nova_compute.volumeMounts }}{{ toYaml $mounts_nova_compute.volumeMounts | indent 12 }}{{ end }}
         {{ end }}
         {{- if eq .Values.console.console_kind "novnc"}}
         - name: nova-compute-vnc-init
@@ -187,6 +191,7 @@ spec:
               readOnly: true
             - name: pod-shared
               mountPath: /tmp/pod-shared
+{{ if $mounts_nova_compute.volumeMounts }}{{ toYaml $mounts_nova_compute.volumeMounts | indent 12 }}{{ end }}
         {{ end }}
         {{- if eq .Values.console.console_kind "spice"}}
         - name: nova-compute-spice-init
@@ -205,6 +210,7 @@ spec:
               readOnly: true
             - name: pod-shared
               mountPath: /tmp/pod-shared
+{{ if $mounts_nova_compute.volumeMounts }}{{ toYaml $mounts_nova_compute.volumeMounts | indent 12 }}{{ end }}
         {{ end }}
         {{- if ( has "tungstenfabric" .Values.network.backend ) }}
         - name: tungstenfabric-compute-init
@@ -217,15 +223,19 @@ spec:
               mountPath: /opt/plugin
             - name: tf-plugin-bin
               mountPath: /opt/plugin/bin
+{{ if $mounts_nova_compute.volumeMounts }}{{ toYaml $mounts_nova_compute.volumeMounts | indent 12 }}{{ end }}
         {{- end }}
         {{- if .Values.network.ssh.enabled }}
         - name: nova-compute-ssh-init
 {{ tuple $envAll "nova_compute_ssh" | include "helm-toolkit.snippets.image" | indent 10 }}
 {{ tuple $envAll $envAll.Values.pod.resources.ssh | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
+{{ dict "envAll" $envAll "application" "nova" "container" "nova_compute_ssh_init" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
           terminationMessagePath: /var/log/termination-log
           env:
             - name: SSH_PORT
               value: {{ .Values.network.ssh.port | quote }}
+            - name: NOVA_USER_UID
+              value: "{{ .Values.pod.security_context.nova.pod.runAsUser }}"
           command:
             - /tmp/ssh-init.sh
           volumeMounts:
@@ -241,14 +251,13 @@ spec:
               mountPath: /tmp/ssh-init.sh
               subPath: ssh-init.sh
               readOnly: true
+{{ if $mounts_nova_compute.volumeMounts }}{{ toYaml $mounts_nova_compute.volumeMounts | indent 12 }}{{ end }}
         {{- end }}
       containers:
         - name: nova-compute
 {{ tuple $envAll "nova_compute" | include "helm-toolkit.snippets.image" | indent 10 }}
 {{ tuple $envAll $envAll.Values.pod.resources.compute | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
 {{ dict "envAll" $envAll "application" "nova" "container" "nova_compute" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
-          securityContext:
-            privileged: true
           env:
           {{- if .Values.conf.ceph.enabled }}
             - name: CEPH_CINDER_USER
@@ -431,8 +440,6 @@ spec:
 {{ tuple $envAll "nova_compute_ssh" | include "helm-toolkit.snippets.image" | indent 10 }}
 {{ tuple $envAll $envAll.Values.pod.resources.ssh | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
 {{ dict "envAll" $envAll "application" "nova" "container" "nova_compute_ssh" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
-          securityContext:
-            privileged: true
           env:
             - name: KEY_TYPES
               value: {{ include "helm-toolkit.utils.joinListWithComma" .Values.network.ssh.key_types | quote }}
@@ -455,6 +462,7 @@ spec:
               subPath: ssh-start.sh
               readOnly: true
 {{- dict "enabled" .Values.manifests.certificates "name" .Values.secrets.tls.compute.osapi.internal "path" "/etc/nova/certs" | include "helm-toolkit.snippets.tls_volume_mount" | indent 12 }}
+{{ if $mounts_nova_compute.volumeMounts }}{{ toYaml $mounts_nova_compute.volumeMounts | indent 12 }}{{ end }}
         {{ end }}
       volumes:
         - name: pod-tmp

nova/values.yaml

@@ -2155,8 +2155,10 @@ pod:
           readOnlyRootFilesystem: true
           privileged: true
         nova_compute_ssh:
-          readOnlyRootFilesystem: true
           privileged: true
+          runAsUser: 0
+        nova_compute_ssh_init:
+          runAsUser: 0
         nova_api_metadata_init:
           readOnlyRootFilesystem: true
           allowPrivilegeEscalation: false

releasenotes/notes/nova.yaml

@@ -46,4 +46,5 @@ nova:
   - 0.2.23 Add option to enable extra wait for cell-setup-init
   - 0.2.24 Fix nova-bootstrap job labels
   - 0.2.25 Add check for compute nodes
+  - 0.2.26 Fix _ssh-start.sh.tpl to copy the ssh keys to the user on the security context
 ...