Add kube-proxy daemonset track to GCE startup scripts (GCI, Debian and CoreOS).

cluster/addons/kube-proxy/kube-proxy-ds.yaml

@@ -48,6 +48,8 @@ spec:
         - -c
         - echo -998 > /proc/$$$/oom_score_adj && kube-proxy {{kubeconfig}} {{cluster_cidr}} --resource-container="" {{params}} 1>>/var/log/kube-proxy.log 2>&1
         {{container_env}}
+        {{kube_cache_mutation_detector_env_name}}
+          {{kube_cache_mutation_detector_env_value}}
         securityContext:
           privileged: true
         volumeMounts:

cluster/gce/configure-vm.sh

@@ -653,14 +653,15 @@ EOF
 
 # This should happen both on cluster initialization and node upgrades.
 #
-#  - Uses the CA_CERT and KUBE_PROXY_TOKEN to generate a kubeconfig file for
-#    the kube-proxy to securely connect to the apiserver.
+#  - When run as static pods, use the CA_CERT and KUBE_PROXY_TOKEN to generate a
+#    kubeconfig file for the kube-proxy to securely connect to the apiserver.
+#  - When run as a daemonset, generate a kubeconfig file specific to service account.
 function create-salt-kubeproxy-auth() {
   local -r kube_proxy_kubeconfig_file="/srv/salt-overlay/salt/kube-proxy/kubeconfig"
+  local kubeconfig_content=""
   if [ ! -e "${kube_proxy_kubeconfig_file}" ]; then
-    mkdir -p /srv/salt-overlay/salt/kube-proxy
-    (umask 077;
-        cat > "${kube_proxy_kubeconfig_file}" <<EOF
+    if [[ "${KUBE_PROXY_DAEMONSET:-}" != "true" ]]; then
+      kubeconfig_content="\
 apiVersion: v1
 kind: Config
 users:
@@ -676,7 +677,33 @@ contexts:
     cluster: local
     user: kube-proxy
   name: service-account-context
-current-context: service-account-context
+current-context: service-account-context"
+    else
+      # Generate kubeconfig specific to service account.
+      kubeconfig_content="\
+apiVersion: v1
+kind: Config
+clusters:
+- cluster:
+    certificate-authority: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
+    server: https://${KUBERNETES_MASTER_NAME}
+  name: default
+contexts:
+- context:
+    cluster: default
+    namespace: default
+    user: default
+  name: default
+current-context: default
+users:
+- name: default
+  user:
+    tokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token"
+    fi
+    mkdir -p /srv/salt-overlay/salt/kube-proxy
+    (umask 077;
+        cat > "${kube_proxy_kubeconfig_file}" <<EOF
+${kubeconfig_content}
 EOF
 )
   fi

cluster/gce/container-linux/configure-helper.sh

@@ -387,8 +387,8 @@ function create-master-kubelet-auth {
   fi
 }
 
-function create-kubeproxy-kubeconfig {
-  echo "Creating kube-proxy kubeconfig file"
+function create-kubeproxy-user-kubeconfig {
+  echo "Creating kube-proxy user kubeconfig file"
   cat <<EOF >/var/lib/kube-proxy/kubeconfig
 apiVersion: v1
 kind: Config
@@ -409,6 +409,30 @@ current-context: service-account-context
 EOF
 }
 
+function create-kubeproxy-serviceaccount-kubeconfig {
+  echo "Creating kube-proxy serviceaccount kubeconfig file"
+  cat <<EOF >/var/lib/kube-proxy/kubeconfig
+apiVersion: v1
+kind: Config
+clusters:
+- cluster:
+    certificate-authority: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
+    server: https://${KUBERNETES_MASTER_NAME}
+  name: default
+contexts:
+- context:
+    cluster: default
+    namespace: default
+    user: default
+  name: default
+current-context: default
+users:
+- name: default
+  user:
+    tokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
+EOF
+}
+
 function create-kubecontrollermanager-kubeconfig {
   echo "Creating kube-controller-manager kubeconfig file"
   mkdir -p /etc/srv/kubernetes/kube-controller-manager
@@ -613,8 +637,17 @@ function start-kubelet {
   if [[ -n "${ENABLE_CUSTOM_METRICS:-}" ]]; then
     flags+=" --enable-custom-metrics=${ENABLE_CUSTOM_METRICS}"
   fi
+  local node_labels=""
+  if [[ "${KUBE_PROXY_DAEMONSET:-}" == "true" && "${KUBERNETES_MASTER:-}" != "true" ]]; then
+    # Add kube-proxy daemonset label to node to avoid situation during cluster
+    # upgrade/downgrade when there are two instances of kube-proxy running on a node.
+    node_labels="beta.kubernetes.io/kube-proxy-ds-ready=true"
+  fi
   if [[ -n "${NODE_LABELS:-}" ]]; then
-    flags+=" --node-labels=${NODE_LABELS}"
+    node_labels="${node_labels:+${node_labels},}${NODE_LABELS}"
+  fi
+  if [[ -n "${node_labels:-}" ]]; then
+    flags+=" --node-labels=${node_labels}"
   fi
   if [[ -n "${NODE_TAINTS:-}" ]]; then
     flags+=" --register-with-taints=${NODE_TAINTS}"
@@ -666,11 +699,11 @@ function prepare-log-file {
   chown root:root $1
 }
 
-# Starts kube-proxy pod.
-function start-kube-proxy {
-  echo "Start kube-proxy pod"
-  prepare-log-file /var/log/kube-proxy.log
-  local -r src_file="${KUBE_HOME}/kube-manifests/kubernetes/kube-proxy.manifest"
+# Prepares parameters for kube-proxy manifest.
+# $1 source path of kube-proxy manifest.
+function prepare-kube-proxy-manifest-variables {
+  local -r src_file=$1;
+
   remove-salt-config-comments "${src_file}"
 
   local -r kubeconfig="--kubeconfig=/var/lib/kube-proxy/kubeconfig"
@@ -689,14 +722,20 @@ function start-kube-proxy {
     params+=" ${KUBEPROXY_TEST_ARGS}"
   fi
   local container_env=""
+  local kube_cache_mutation_detector_env_name=""
+  local kube_cache_mutation_detector_env_value=""
   if [[ -n "${ENABLE_CACHE_MUTATION_DETECTOR:-}" ]]; then
-    container_env="env:\n    - name: KUBE_CACHE_MUTATION_DETECTOR\n    value: \"${ENABLE_CACHE_MUTATION_DETECTOR}\""
+    container_env="env:"
+    kube_cache_mutation_detector_env_name="- name: KUBE_CACHE_MUTATION_DETECTOR"
+    kube_cache_mutation_detector_env_value="value: \"${ENABLE_CACHE_MUTATION_DETECTOR}\""
   fi
   sed -i -e "s@{{kubeconfig}}@${kubeconfig}@g" ${src_file}
   sed -i -e "s@{{pillar\['kube_docker_registry'\]}}@${kube_docker_registry}@g" ${src_file}
   sed -i -e "s@{{pillar\['kube-proxy_docker_tag'\]}}@${kube_proxy_docker_tag}@g" ${src_file}
   sed -i -e "s@{{params}}@${params}@g" ${src_file}
   sed -i -e "s@{{container_env}}@${container_env}@g" ${src_file}
+  sed -i -e "s@{{kube_cache_mutation_detector_env_name}}@${kube_cache_mutation_detector_env_name}@g" ${src_file}
+  sed -i -e "s@{{kube_cache_mutation_detector_env_value}}@${kube_cache_mutation_detector_env_value}@g" ${src_file}
   sed -i -e "s@{{ cpurequest }}@100m@g" ${src_file}
   sed -i -e "s@{{api_servers_with_port}}@${api_servers}@g" ${src_file}
   if [[ -n "${CLUSTER_IP_RANGE:-}" ]]; then
@@ -713,6 +752,14 @@ function start-kube-proxy {
       mount -o remount,rw /sys; "
     sed -i -e "s@-\\s\\+kube-proxy@- ${extra_workaround_cmd} kube-proxy@g" "${src_file}"
   fi
+}
+
+# Starts kube-proxy static pod.
+function start-kube-proxy {
+  echo "Start kube-proxy static pod"
+  prepare-log-file /var/log/kube-proxy.log
+  local -r src_file="${KUBE_HOME}/kube-manifests/kubernetes/kube-proxy.manifest"
+  prepare-kube-proxy-manifest-variables "$src_file"
 
   cp "${src_file}" /etc/kubernetes/manifests
 }
@@ -1217,6 +1264,10 @@ function start-kube-addons {
   setup-addon-manifests "addons" "rbac"
 
   # Set up manifests of other addons.
+  if [[ "${KUBE_PROXY_DAEMONSET:-}" == "true" ]]; then
+    prepare-kube-proxy-manifest-variables "$src_dir/kube-proxy/kube-proxy-ds.yaml"
+    setup-addon-manifests "addons" "kube-proxy"
+  fi
   if [[ "${ENABLE_CLUSTER_MONITORING:-}" == "influxdb" ]] || \
      [[ "${ENABLE_CLUSTER_MONITORING:-}" == "google" ]] || \
      [[ "${ENABLE_CLUSTER_MONITORING:-}" == "stackdriver" ]] || \
@@ -1464,7 +1515,11 @@ if [[ "${KUBERNETES_MASTER:-}" == "true" ]]; then
   create-master-etcd-auth
 else
   create-kubelet-kubeconfig "https://${KUBERNETES_MASTER_NAME}"
-  create-kubeproxy-kubeconfig
+  if [[ "${KUBE_PROXY_DAEMONSET:-}" != "true" ]]; then
+    create-kubeproxy-user-kubeconfig
+  else
+    create-kubeproxy-serviceaccount-kubeconfig
+  fi
 fi
 
 if [[ "${CONTAINER_RUNTIME:-}" == "rkt" ]]; then
@@ -1492,7 +1547,9 @@ if [[ "${KUBERNETES_MASTER:-}" == "true" ]]; then
   start-lb-controller
   start-rescheduler
 else
-  start-kube-proxy
+  if [[ "${KUBE_PROXY_DAEMONSET:-}" != "true" ]]; then
+    start-kube-proxy
+  fi
   # Kube-registry-proxy.
   if [[ "${ENABLE_CLUSTER_REGISTRY:-}" == "true" ]]; then
     start-kube-registry-proxy

cluster/gce/gci/configure-helper.sh

@@ -80,7 +80,6 @@ function get-calico-typha-cpu {
   echo "${typha_cpu}"
 }
 
-
 function config-ip-firewall {
   echo "Configuring IP firewall rules"
   # The GCI image has host firewall which drop most inbound/forwarded packets.
@@ -675,8 +674,8 @@ function create-master-kubelet-auth {
   fi
 }
 
-function create-kubeproxy-kubeconfig {
-  echo "Creating kube-proxy kubeconfig file"
+function create-kubeproxy-user-kubeconfig {
+  echo "Creating kube-proxy user kubeconfig file"
   cat <<EOF >/var/lib/kube-proxy/kubeconfig
 apiVersion: v1
 kind: Config
@@ -697,6 +696,30 @@ current-context: service-account-context
 EOF
 }
 
+function create-kubeproxy-serviceaccount-kubeconfig {
+  echo "Creating kube-proxy serviceaccount kubeconfig file"
+  cat <<EOF >/var/lib/kube-proxy/kubeconfig
+apiVersion: v1
+kind: Config
+clusters:
+- cluster:
+    certificate-authority: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
+    server: https://${KUBERNETES_MASTER_NAME}
+  name: default
+contexts:
+- context:
+    cluster: default
+    namespace: default
+    user: default
+  name: default
+current-context: default
+users:
+- name: default
+  user:
+    tokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
+EOF
+}
+
 function create-kubecontrollermanager-kubeconfig {
   echo "Creating kube-controller-manager kubeconfig file"
   mkdir -p /etc/srv/kubernetes/kube-controller-manager
@@ -921,8 +944,17 @@ function start-kubelet {
   if [[ -n "${ENABLE_CUSTOM_METRICS:-}" ]]; then
     flags+=" --enable-custom-metrics=${ENABLE_CUSTOM_METRICS}"
   fi
+  local node_labels=""
+  if [[ "${KUBE_PROXY_DAEMONSET:-}" == "true" && "${KUBERNETES_MASTER:-}" != "true" ]]; then
+    # Add kube-proxy daemonset label to node to avoid situation during cluster
+    # upgrade/downgrade when there are two instances of kube-proxy running on a node.
+    node_labels="beta.kubernetes.io/kube-proxy-ds-ready=true"
+  fi
   if [[ -n "${NODE_LABELS:-}" ]]; then
-    flags+=" --node-labels=${NODE_LABELS}"
+    node_labels="${node_labels:+${node_labels},}${NODE_LABELS}"
+  fi
+  if [[ -n "${node_labels:-}" ]]; then
+    flags+=" --node-labels=${node_labels}"
   fi
   if [[ -n "${NODE_TAINTS:-}" ]]; then
     flags+=" --register-with-taints=${NODE_TAINTS}"
@@ -1003,11 +1035,11 @@ function prepare-log-file {
   chown root:root $1
 }
 
-# Starts kube-proxy pod.
-function start-kube-proxy {
-  echo "Start kube-proxy pod"
-  prepare-log-file /var/log/kube-proxy.log
-  local -r src_file="${KUBE_HOME}/kube-manifests/kubernetes/kube-proxy.manifest"
+# Prepares parameters for kube-proxy manifest.
+# $1 source path of kube-proxy manifest.
+function prepare-kube-proxy-manifest-variables {
+  local -r src_file=$1;
+
   remove-salt-config-comments "${src_file}"
 
   local -r kubeconfig="--kubeconfig=/var/lib/kube-proxy/kubeconfig"
@@ -1026,19 +1058,34 @@ function start-kube-proxy {
     params+=" ${KUBEPROXY_TEST_ARGS}"
   fi
   local container_env=""
+  local kube_cache_mutation_detector_env_name=""
+  local kube_cache_mutation_detector_env_value=""
   if [[ -n "${ENABLE_CACHE_MUTATION_DETECTOR:-}" ]]; then
-    container_env="env:\n    - name: KUBE_CACHE_MUTATION_DETECTOR\n    value: \"${ENABLE_CACHE_MUTATION_DETECTOR}\""
+    container_env="env:"
+    kube_cache_mutation_detector_env_name="- name: KUBE_CACHE_MUTATION_DETECTOR"
+    kube_cache_mutation_detector_env_value="value: \"${ENABLE_CACHE_MUTATION_DETECTOR}\""
   fi
   sed -i -e "s@{{kubeconfig}}@${kubeconfig}@g" ${src_file}
   sed -i -e "s@{{pillar\['kube_docker_registry'\]}}@${kube_docker_registry}@g" ${src_file}
   sed -i -e "s@{{pillar\['kube-proxy_docker_tag'\]}}@${kube_proxy_docker_tag}@g" ${src_file}
   sed -i -e "s@{{params}}@${params}@g" ${src_file}
   sed -i -e "s@{{container_env}}@${container_env}@g" ${src_file}
+  sed -i -e "s@{{kube_cache_mutation_detector_env_name}}@${kube_cache_mutation_detector_env_name}@g" ${src_file}
+  sed -i -e "s@{{kube_cache_mutation_detector_env_value}}@${kube_cache_mutation_detector_env_value}@g" ${src_file}
   sed -i -e "s@{{ cpurequest }}@100m@g" ${src_file}
   sed -i -e "s@{{api_servers_with_port}}@${api_servers}@g" ${src_file}
   if [[ -n "${CLUSTER_IP_RANGE:-}" ]]; then
     sed -i -e "s@{{cluster_cidr}}@--cluster-cidr=${CLUSTER_IP_RANGE}@g" ${src_file}
   fi
+}
+
+# Starts kube-proxy static pod.
+function start-kube-proxy {
+  echo "Start kube-proxy static pod"
+  prepare-log-file /var/log/kube-proxy.log
+  local -r src_file="${KUBE_HOME}/kube-manifests/kubernetes/kube-proxy.manifest"
+  prepare-kube-proxy-manifest-variables "${src_file}"
+
   cp "${src_file}" /etc/kubernetes/manifests
 }
 
@@ -1641,6 +1688,10 @@ function start-kube-addons {
   setup-addon-manifests "addons" "rbac"
 
   # Set up manifests of other addons.
+  if [[ "${KUBE_PROXY_DAEMONSET:-}" == "true" ]]; then
+    prepare-kube-proxy-manifest-variables "$src_dir/kube-proxy/kube-proxy-ds.yaml"
+    setup-addon-manifests "addons" "kube-proxy"
+  fi
   if [[ "${ENABLE_CLUSTER_MONITORING:-}" == "influxdb" ]] || \
      [[ "${ENABLE_CLUSTER_MONITORING:-}" == "google" ]] || \
      [[ "${ENABLE_CLUSTER_MONITORING:-}" == "stackdriver" ]] || \
@@ -1889,7 +1940,11 @@ if [[ "${KUBERNETES_MASTER:-}" == "true" ]]; then
 else
   create-node-pki
   create-kubelet-kubeconfig ${KUBERNETES_MASTER_NAME}
-  create-kubeproxy-kubeconfig
+  if [[ "${KUBE_PROXY_DAEMONSET:-}" != "true" ]]; then
+    create-kubeproxy-user-kubeconfig
+  else
+    create-kubeproxy-serviceaccount-kubeconfig
+  fi
   if [[ "${ENABLE_NODE_PROBLEM_DETECTOR:-}" == "standalone" ]]; then
     create-node-problem-detector-kubeconfig
   fi
@@ -1912,7 +1967,9 @@ if [[ "${KUBERNETES_MASTER:-}" == "true" ]]; then
   start-lb-controller
   start-rescheduler
 else
-  start-kube-proxy
+  if [[ "${KUBE_PROXY_DAEMONSET:-}" != "true" ]]; then
+    start-kube-proxy
+  fi
   # Kube-registry-proxy.
   if [[ "${ENABLE_CLUSTER_REGISTRY:-}" == "true" ]]; then
     start-kube-registry-proxy

cluster/saltbase/salt/kube-proxy/init.sls

@@ -7,6 +7,7 @@
     - makedirs: true
 
 # kube-proxy in a static pod
+{% if pillar.get('kube_proxy_daemonset', '').lower() != 'true' %}
 /etc/kubernetes/manifests/kube-proxy.manifest:
   file.managed:
     - source: salt://kube-proxy/kube-proxy.manifest
@@ -24,6 +25,7 @@
     - require:
       - service: docker
       - service: kubelet
+{% endif %}
 
 /var/log/kube-proxy.log:
   file.managed:

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

@@ -38,6 +38,8 @@
 {% set params = log_level + " " + throttles + " " + feature_gates + " " + test_args -%}
 
 {% set container_env = "" -%}
+{% set kube_cache_mutation_detector_env_name = "" -%}
+{% set kube_cache_mutation_detector_env_value = "" -%}
 
 # kube-proxy podspec
 apiVersion: v1
@@ -78,6 +80,8 @@ spec:
     - -c
     - echo -998 > /proc/$$$/oom_score_adj && kube-proxy {{api_servers_with_port}} {{kubeconfig}} {{cluster_cidr}} --resource-container="" {{params}} 1>>/var/log/kube-proxy.log 2>&1
     {{container_env}}
+    {{kube_cache_mutation_detector_env_name}}
+      {{kube_cache_mutation_detector_env_value}}
     securityContext:
       privileged: true
     volumeMounts:

cluster/saltbase/salt/kubelet/default

@@ -164,10 +164,16 @@
   {% set enable_custom_metrics="--enable-custom-metrics=" + pillar['enable_custom_metrics'] %}
 {% endif -%}
 
-{% set node_labels = "" %}
-{% if pillar['node_labels'] is defined -%}
-  {% set node_labels="--node-labels=" + pillar['node_labels'] %}
-{% endif -%}
+{% set kube_proxy_ds_label = "" %}
+{% if grains['roles'][0] != 'kubernetes-master' and pillar.get('kube_proxy_daemonset', '').lower() == 'true' %}
+  # Add kube-proxy daemonset label to node to avoid situation during cluster
+  # upgrade/downgrade when there are two instances of kube-proxy running on a node.
+  {% set kube_proxy_ds_label = "beta.kubernetes.io/kube-proxy-ds-ready=true," %}
+{% endif %}
+{% set node_labels = kube_proxy_ds_label + pillar['node_labels'] %}
+{% if node_labels != "" %}
+  {% set node_labels="--node-labels=" + node_labels %}
+{% endif %}
 
 {% set node_taints = "" %}
 {% if pillar['node_taints'] is defined -%}