Scripts to configure image verification admission controller for gce.

cluster/gce/configure-vm.sh

@@ -460,6 +460,11 @@ kube_uid: '$(echo "${KUBE_UID}" | sed -e "s/'/''/g")'
 initial_etcd_cluster: '$(echo "${INITIAL_ETCD_CLUSTER:-}" | sed -e "s/'/''/g")'
 hostname: $(hostname -s)
 EOF
+    if [ -n "${ADMISSION_CONTROL:-}" ] && [ ${ADMISSION_CONTROL} == *"ImagePolicyWebhook"* ]; then
+      cat <<EOF >>/srv/salt-overlay/pillar/cluster-params.sls
+admission-control-config-file: /etc/admission_controller.config
+EOF
+    fi
     if [ -n "${KUBELET_PORT:-}" ]; then
       cat <<EOF >>/srv/salt-overlay/pillar/cluster-params.sls
 kubelet_port: '$(echo "$KUBELET_PORT" | sed -e "s/'/''/g")'
@@ -896,6 +901,44 @@ contexts:
 EOF
   fi
 
+
+  if [[ -n "${GCP_IMAGE_VERIFICATION_URL:-}" ]]; then
+    # This is the config file for the image review webhook.
+    cat <<EOF >>/etc/salt/minion.d/grains.conf
+  image_review_config: /etc/gcp_image_review.config
+EOF
+    cat <<EOF >/etc/gcp_image_review.config
+clusters:
+  - name: gcp-image-review-server
+    cluster:
+      server: ${GCP_IMAGE_VERIFICATION_URL}
+users:
+  - name: kube-apiserver
+    user:
+      auth-provider:
+        name: gcp
+current-context: webhook
+contexts:
+- context:
+    cluster: gcp-image-review-server
+    user: kube-apiserver
+  name: webhook
+EOF
+    # This is the config for the image review admission controller.
+    cat <<EOF >>/etc/salt/minion.d/grains.conf
+  image_review_webhook_config: /etc/admission_controller.config
+EOF
+    cat <<EOF >/etc/admission_controller.config
+imagePolicy:
+  kubeConfigFile: /etc/gcp_image_review.config
+  allowTTL: 30
+  denyTTL: 30
+  retryBackoff: 500
+  defaultAllow: true
+EOF
+  fi
+
+
   # If the kubelet on the master is enabled, give it the same CIDR range
   # as a generic node.
   if [[ ! -z "${KUBELET_APISERVER:-}" ]] && [[ ! -z "${KUBELET_CERT:-}" ]] && [[ ! -z "${KUBELET_KEY:-}" ]]; then

cluster/gce/gci/configure-helper.sh

@@ -279,6 +279,36 @@ contexts:
   name: webhook
 EOF
   fi
+
+if [[ -n "${GCP_IMAGE_VERIFICATION_URL:-}" ]]; then
+    # This is the config file for the image review webhook.
+    cat <<EOF >/etc/gcp_image_review.config
+clusters:
+  - name: gcp-image-review-server
+    cluster:
+      server: ${GCP_IMAGE_VERIFICATION_URL}
+users:
+  - name: kube-apiserver
+    user:
+      auth-provider:
+        name: gcp
+current-context: webhook
+contexts:
+- context:
+    cluster: gcp-image-review-server
+    user: kube-apiserver
+  name: webhook
+EOF
+    # This is the config for the image review admission controller.
+    cat <<EOF >/etc/admission_controller.config
+imagePolicy:
+  kubeConfigFile: /etc/gcp_image_review.config
+  allowTTL: 30
+  denyTTL: 30
+  retryBackoff: 500
+  defaultAllow: true
+EOF
+  fi
 }
 
 function create-kubelet-kubeconfig {
@@ -670,9 +700,24 @@ function start-kube-apiserver {
   if [[ -n "${SERVICE_CLUSTER_IP_RANGE:-}" ]]; then
     params+=" --service-cluster-ip-range=${SERVICE_CLUSTER_IP_RANGE}"
   fi
+
+  local admission_controller_config_mount=""
+  local admission_controller_config_volume=""
+  local image_policy_webhook_config_mount=""
+  local image_policy_webhook_config_volume=""
   if [[ -n "${ADMISSION_CONTROL:-}" ]]; then
     params+=" --admission-control=${ADMISSION_CONTROL}"
+    if [[ ${ADMISSION_CONTROL} == *"ImagePolicyWebhook"* ]]; then
+      params+=" --admission-control-config-file=/etc/admission_controller.config"
+      # Mount the file to configure admission controllers if ImagePolicyWebhook is set.
+      admission_controller_config_mount="{\"name\": \"admissioncontrollerconfigmount\",\"mountPath\": \"/etc/admission_controller.config\", \"readOnly\": false},"
+      admission_controller_config_volume="{\"name\": \"admissioncontrollerconfigmount\",\"hostPath\": {\"path\": \"/etc/admission_controller.config\"}},"
+      # Mount the file to configure the ImagePolicyWebhook's webhook.
+      image_policy_webhook_config_mount="{\"name\": \"imagepolicywebhookconfigmount\",\"mountPath\": \"/etc/gcp_image_review.config\", \"readOnly\": false},"
+      image_policy_webhook_config_volume="{\"name\": \"imagepolicywebhookconfigmount\",\"hostPath\": {\"path\": \"/etc/gcp_image_review.config\"}},"
     fi
+  fi
+
   if [[ -n "${KUBE_APISERVER_REQUEST_TIMEOUT:-}" ]]; then
     params+=" --min-request-timeout=${KUBE_APISERVER_REQUEST_TIMEOUT}"
   fi
@@ -689,8 +734,8 @@ function start-kube-apiserver {
     params+=" --ssh-keyfile=/etc/srv/sshproxy/.sshkeyfile"
   fi
 
-  webhook_authn_config_mount=""
+  local webhook_authn_config_mount=""
-  webhook_authn_config_volume=""
+  local webhook_authn_config_volume=""
   if [[ -n "${GCP_AUTHN_URL:-}" ]]; then
     params+=" --authentication-token-webhook-config-file=/etc/gcp_authn.config"
     webhook_authn_config_mount="{\"name\": \"webhookauthnconfigmount\",\"mountPath\": \"/etc/gcp_authn.config\", \"readOnly\": false},"
@@ -698,8 +743,8 @@ function start-kube-apiserver {
   fi
 
   params+=" --authorization-mode=ABAC"
-  webhook_config_mount=""
+  local webhook_config_mount=""
-  webhook_config_volume=""
+  local webhook_config_volume=""
   if [[ -n "${GCP_AUTHZ_URL:-}" ]]; then
     params+=",Webhook --authorization-webhook-config-file=/etc/gcp_authz.config"
     webhook_config_mount="{\"name\": \"webhookconfigmount\",\"mountPath\": \"/etc/gcp_authz.config\", \"readOnly\": false},"
@@ -734,6 +779,10 @@ function start-kube-apiserver {
   sed -i -e "s@{{webhook_authn_config_volume}}@${webhook_authn_config_volume}@g" "${src_file}"
   sed -i -e "s@{{webhook_config_mount}}@${webhook_config_mount}@g" "${src_file}"
   sed -i -e "s@{{webhook_config_volume}}@${webhook_config_volume}@g" "${src_file}"
+  sed -i -e "s@{{admission_controller_config_mount}}@${admission_controller_config_mount}@g" "${src_file}"
+  sed -i -e "s@{{admission_controller_config_volume}}@${admission_controller_config_volume}@g" "${src_file}"
+  sed -i -e "s@{{image_policy_webhook_config_mount}}@${image_policy_webhook_config_mount}@g" "${src_file}"
+  sed -i -e "s@{{image_policy_webhook_config_volume}}@${image_policy_webhook_config_volume}@g" "${src_file}"
   cp "${src_file}" /etc/kubernetes/manifests
 }
 

cluster/gce/trusty/configure-helper.sh

@@ -389,6 +389,36 @@ contexts:
   name: webhook
 EOF
   fi
+
+if [[ -n "${GCP_IMAGE_VERIFICATION_URL:-}" ]]; then
+    # This is the config file for the image review webhook.
+    cat <<EOF >/etc/gcp_image_review.config
+clusters:
+  - name: gcp-image-review-server
+    cluster:
+      server: ${GCP_IMAGE_VERIFICATION_URL}
+users:
+  - name: kube-apiserver
+    user:
+      auth-provider:
+        name: gcp
+current-context: webhook
+contexts:
+- context:
+    cluster: gcp-image-review-server
+    user: kube-apiserver
+  name: webhook
+EOF
+    # This is the config for the image review admission controller.
+    cat <<EOF >/etc/admission_controller.config
+imagePolicy:
+  kubeConfigFile: /etc/gcp_image_review.config
+  allowTTL: 30
+  denyTTL: 30
+  retryBackoff: 500
+  defaultAllow: true
+EOF
+  fi
 }
 
 # Uses KUBELET_CA_CERT (falling back to CA_CERT), KUBELET_CERT, and KUBELET_KEY
@@ -537,9 +567,24 @@ start_kube_apiserver() {
   if [ -n "${SERVICE_CLUSTER_IP_RANGE:-}" ]; then
     params="${params} --service-cluster-ip-range=${SERVICE_CLUSTER_IP_RANGE}"
   fi
+
+  local admission_controller_config_mount=""
+  local admission_controller_config_volume=""
+  local image_policy_webhook_config_mount=""
+  local image_policy_webhook_config_volume=""
   if [ -n "${ADMISSION_CONTROL:-}" ]; then
     params="${params} --admission-control=${ADMISSION_CONTROL}"
+    if [ ${ADMISSION_CONTROL} == *"ImagePolicyWebhook"* ]; then
+      params+=" --admission-control-config-file=/etc/admission_controller.config"
+      # Mount the file to configure admission controllers if ImagePolicyWebhook is set.
+      admission_controller_config_mount="{\"name\": \"admissioncontrollerconfigmount\",\"mountPath\": \"/etc/admission_controller.config\", \"readOnly\": false},"
+      admission_controller_config_volume="{\"name\": \"admissioncontrollerconfigmount\",\"hostPath\": {\"path\": \"/etc/admission_controller.config\"}},"
+      # Mount the file to configure the ImagePolicyWebhook's webhook.
+      image_policy_webhook_config_mount="{\"name\": \"imagepolicywebhookconfigmount\",\"mountPath\": \"/etc/gcp_image_review.config\", \"readOnly\": false},"
+      image_policy_webhook_config_volume="{\"name\": \"imagepolicywebhookconfigmount\",\"hostPath\": {\"path\": \"/etc/gcp_image_review.config\"}},"
     fi
+  fi
+
   if [ -n "${KUBE_APISERVER_REQUEST_TIMEOUT:-}" ]; then
     params="${params} --min-request-timeout=${KUBE_APISERVER_REQUEST_TIMEOUT}"
   fi
@@ -554,8 +599,8 @@ start_kube_apiserver() {
   fi
   readonly kube_apiserver_docker_tag=$(cat /home/kubernetes/kube-docker-files/kube-apiserver.docker_tag)
 
-  webhook_authn_config_mount=""
+  local webhook_authn_config_mount=""
-  webhook_authn_config_volume=""
+  local webhook_authn_config_volume=""
   if [ -n "${GCP_AUTHN_URL:-}" ]; then
     params="${params} --authentication-token-webhook-config-file=/etc/gcp_authn.config"
     webhook_authn_config_mount="{\"name\": \"webhookauthnconfigmount\",\"mountPath\": \"/etc/gcp_authn.config\", \"readOnly\": false},"
@@ -563,8 +608,8 @@ start_kube_apiserver() {
   fi
 
   params="${params} --authorization-mode=ABAC"
-  webhook_config_mount=""
+  local webhook_config_mount=""
-  webhook_config_volume=""
+  local webhook_config_volume=""
   if [ -n "${GCP_AUTHZ_URL:-}" ]; then
     params="${params},Webhook --authorization-webhook-config-file=/etc/gcp_authz.config"
     webhook_config_mount="{\"name\": \"webhookconfigmount\",\"mountPath\": \"/etc/gcp_authz.config\", \"readOnly\": false},"
@@ -599,6 +644,10 @@ start_kube_apiserver() {
   sed -i -e "s@{{webhook_authn_config_volume}}@${webhook_authn_config_volume}@g" "${src_file}"
   sed -i -e "s@{{webhook_config_mount}}@${webhook_config_mount}@g" "${src_file}"
   sed -i -e "s@{{webhook_config_volume}}@${webhook_config_volume}@g" "${src_file}"
+  sed -i -e "s@{{admission_controller_config_mount}}@${admission_controller_config_mount}@g" "${src_file}"
+  sed -i -e "s@{{admission_controller_config_volume}}@${admission_controller_config_volume}@g" "${src_file}"
+  sed -i -e "s@{{image_policy_webhook_config_mount}}@${image_policy_webhook_config_mount}@g" "${src_file}"
+  sed -i -e "s@{{image_policy_webhook_config_volume}}@${image_policy_webhook_config_volume}@g" "${src_file}"
 
   cp "${src_file}" /etc/kubernetes/manifests
 }

cluster/saltbase/salt/kube-apiserver/kube-apiserver.manifest

@@ -120,6 +120,19 @@
   {% set authz_mode = authz_mode + ",Webhook" -%}
 {% endif -%}
 
+{% set image_review_config = "" -%}
+{% set admission_controller_config_mount = "" -%}
+{% set admission_controller_config_volume = "" -%}
+{% set image_policy_webhook_config_mount = "" -%}
+{% set image_policy_webhook_config_volume = "" -%}
+{% if grains.image_review_config is defined -%}
+  {% set image_review_config = " --admission-control-config-file=" + grains.image_review_config -%}
+  {% set admission_controller_config_mount = "{\"name\": \"admissioncontrollerconfigmount\",\"mountPath\": \"" + grains.image_review_config + "\", \"readOnly\": false}," -%}
+  {% set admission_controller_config_volume = "{\"name\": \"admissioncontrollerconfigmount\",\"hostPath\": {\"path\": \"" + grains.image_review_config + "\"}}," -%}
+  {% set image_policy_webhook_config_mount = "{\"name\": \"imagepolicywebhookconfigmount\",\"mountPath\": \"/etc/gcp_image_review.config\", \"readOnly\": false}," -%}
+  {% set image_policy_webhook_config_volume = "{\"name\": \"imagepolicywebhookconfigmount\",\"hostPath\": {\"path\": \"/etc/gcp_image_review.config\"}}," -%}
+{% endif -%}
+
 {% set admission_control = "" -%}
 {% if pillar['admission_control'] is defined -%}
  {% set admission_control = "--admission-control=" + pillar['admission_control'] -%}
@@ -146,7 +159,7 @@
 {% endif -%}
 
 {% set params = address + " " + storage_backend + " " + etcd_servers + " " + etcd_servers_overrides + " " + cloud_provider + " " + cloud_config + " " + runtime_config + " " + feature_gates + " " + admission_control + " " + target_ram_mb + " " + service_cluster_ip_range + " " + client_ca_file + basic_auth_file + " " + min_request_timeout + " " + enable_garbage_collector -%}
-{% set params = params + " " + cert_file + " " + key_file + " --secure-port=" + secure_port + token_auth_file + " " + bind_address + " " + log_level + " " + advertise_address  + " " + proxy_ssh_options + authz_mode + abac_policy_file + webhook_authentication_config + webhook_authorization_config -%}
+{% set params = params + " " + cert_file + " " + key_file + " --secure-port=" + secure_port + token_auth_file + " " + bind_address + " " + log_level + " " + advertise_address  + " " + proxy_ssh_options + authz_mode + abac_policy_file + webhook_authentication_config + webhook_authorization_config + image_review_config -%}
 
 # test_args has to be kept at the end, so they'll overwrite any prior configuration
 {% if pillar['apiserver_test_args'] is defined -%}
@@ -202,6 +215,8 @@
         {{additional_cloud_config_mount}}
         {{webhook_config_mount}}
         {{webhook_authn_config_mount}}
+        {{admission_controller_config_mount}}
+        {{image_policy_webhook_config_mount}}
         { "name": "srvkube",
         "mountPath": "{{srv_kube_path}}",
         "readOnly": true},
@@ -231,6 +246,8 @@
   {{additional_cloud_config_volume}}
   {{webhook_config_volume}}
   {{webhook_authn_config_volume}}
+  {{admission_controller_config_volume}}
+  {{image_policy_webhook_config_volume}}
   { "name": "srvkube",
     "hostPath": {
         "path": "{{srv_kube_path}}"}