Add config to run minions on GCE using Ubuntu.

cluster/gce/trusty/helper.sh

+#!/bin/bash
+
+# Copyright 2015 The Kubernetes Authors All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A library of helper functions and constant for ubuntu os distro
+
+# The code and configuration is for running node instances on Ubuntu images.
+# The master is still on Debian. In addition, the configuration is based on
+# upstart, which is in Ubuntu upto 14.04 LTS (Trusty). Ubuntu 15.04 and above
+# replaced upstart with systemd as the init system. Consequently, the
+# configuration cannot work on these images.
+
+# $1: if 'true', we're building a master yaml, else a node
+function build-kube-env {
+  local master=$1
+  local file=$2
+
+  rm -f ${file}
+  # TODO(andyzheng0831): master node is still running with Debian image. Switch it
+  # to Ubuntu trusty.
+  if [[ "${master}" == "true" ]]; then
+  cat >$file <<EOF
+KUBERNETES_MASTER: "true"
+ENV_TIMESTAMP: $(yaml-quote $(date -u +%Y-%m-%dT%T%z))
+INSTANCE_PREFIX: $(yaml-quote ${INSTANCE_PREFIX})
+NODE_INSTANCE_PREFIX: $(yaml-quote ${NODE_INSTANCE_PREFIX})
+CLUSTER_IP_RANGE: $(yaml-quote ${CLUSTER_IP_RANGE:-10.244.0.0/16})
+SERVER_BINARY_TAR_URL: $(yaml-quote ${SERVER_BINARY_TAR_URL})
+SERVER_BINARY_TAR_HASH: $(yaml-quote ${SERVER_BINARY_TAR_HASH})
+SALT_TAR_URL: $(yaml-quote ${SALT_TAR_URL})
+SALT_TAR_HASH: $(yaml-quote ${SALT_TAR_HASH})
+SERVICE_CLUSTER_IP_RANGE: $(yaml-quote ${SERVICE_CLUSTER_IP_RANGE})
+ALLOCATE_NODE_CIDRS: $(yaml-quote ${ALLOCATE_NODE_CIDRS:-false})
+ENABLE_CLUSTER_MONITORING: $(yaml-quote ${ENABLE_CLUSTER_MONITORING:-none})
+ENABLE_NODE_MONITORING: $(yaml-quote ${ENABLE_NODE_MONITORING:-false})
+ENABLE_CLUSTER_LOGGING: $(yaml-quote ${ENABLE_CLUSTER_LOGGING:-false})
+ENABLE_CLUSTER_UI: $(yaml-quote ${ENABLE_CLUSTER_UI:-false})
+ENABLE_NODE_LOGGING: $(yaml-quote ${ENABLE_NODE_LOGGING:-false})
+LOGGING_DESTINATION: $(yaml-quote ${LOGGING_DESTINATION:-})
+ELASTICSEARCH_LOGGING_REPLICAS: $(yaml-quote ${ELASTICSEARCH_LOGGING_REPLICAS:-})
+ENABLE_CLUSTER_DNS: $(yaml-quote ${ENABLE_CLUSTER_DNS:-false})
+DNS_REPLICAS: $(yaml-quote ${DNS_REPLICAS:-})
+DNS_SERVER_IP: $(yaml-quote ${DNS_SERVER_IP:-})
+DNS_DOMAIN: $(yaml-quote ${DNS_DOMAIN:-})
+KUBE_USER: $(yaml-quote ${KUBE_USER})
+KUBE_PASSWORD: $(yaml-quote ${KUBE_PASSWORD})
+KUBE_BEARER_TOKEN: $(yaml-quote ${KUBE_BEARER_TOKEN})
+KUBELET_TOKEN: $(yaml-quote ${KUBELET_TOKEN:-})
+KUBE_PROXY_TOKEN: $(yaml-quote ${KUBE_PROXY_TOKEN:-})
+ADMISSION_CONTROL: $(yaml-quote ${ADMISSION_CONTROL:-})
+MASTER_IP_RANGE: $(yaml-quote ${MASTER_IP_RANGE})
+KUBERNETES_MASTER_NAME: $(yaml-quote ${MASTER_NAME})
+KUBERNETES_CONTAINER_RUNTIME: $(yaml-quote ${CONTAINER_RUNTIME})
+RKT_VERSION: $(yaml-quote ${RKT_VERSION})
+CA_CERT: $(yaml-quote ${CA_CERT_BASE64})
+MASTER_CERT: $(yaml-quote ${MASTER_CERT_BASE64:-})
+MASTER_KEY: $(yaml-quote ${MASTER_KEY_BASE64:-})
+KUBECFG_CERT: $(yaml-quote ${KUBECFG_CERT_BASE64:-})
+KUBECFG_KEY: $(yaml-quote ${KUBECFG_KEY_BASE64:-})
+EOF
+  else
+    cat >>$file <<EOF
+ENV_TIMESTAMP="$(date -u +%Y-%m-%dT%T%z)"
+INSTANCE_PREFIX=${INSTANCE_PREFIX}
+NODE_INSTANCE_PREFIX=${NODE_INSTANCE_PREFIX}
+SERVER_BINARY_TAR_URL=${SERVER_BINARY_TAR_URL}
+SERVER_BINARY_TAR_HASH=${SERVER_BINARY_TAR_HASH}
+SALT_TAR_URL=${SALT_TAR_URL}
+SALT_TAR_HASH=${SALT_TAR_HASH}
+SERVICE_CLUSTER_IP_RANGE=${SERVICE_CLUSTER_IP_RANGE}
+ENABLE_CLUSTER_MONITORING=${ENABLE_CLUSTER_MONITORING:-none}
+ENABLE_NODE_MONITORING=${ENABLE_NODE_MONITORING:-false}
+ENABLE_CLUSTER_LOGGING=${ENABLE_CLUSTER_LOGGING:-false}
+ENABLE_NODE_LOGGING=${ENABLE_NODE_LOGGING:-false}
+LOGGING_DESTINATION=${LOGGING_DESTINATION:-}
+ELASTICSEARCH_LOGGING_REPLICAS=${ELASTICSEARCH_LOGGING_REPLICAS:-}
+ENABLE_CLUSTER_DNS=${ENABLE_CLUSTER_DNS:-false}
+DNS_REPLICAS=${DNS_REPLICAS:-}
+DNS_SERVER_IP=${DNS_SERVER_IP:-}
+DNS_DOMAIN=${DNS_DOMAIN:-}
+KUBELET_TOKEN=${KUBELET_TOKEN:-}
+KUBE_PROXY_TOKEN=${KUBE_PROXY_TOKEN:-}
+ADMISSION_CONTROL=${ADMISSION_CONTROL:-}
+MASTER_IP_RANGE=${MASTER_IP_RANGE}
+KUBERNETES_MASTER_NAME=${MASTER_NAME}
+ZONE=${ZONE}
+EXTRA_DOCKER_OPTS=${EXTRA_DOCKER_OPTS:-}
+PROJECT_ID=${PROJECT}
+CA_CERT=${CA_CERT_BASE64}
+KUBELET_CERT=${KUBELET_CERT_BASE64:-}
+KUBELET_KEY=${KUBELET_KEY_BASE64:-}
+EOF
+  fi
+}
+
+# create-master-instance creates the master instance. If called with
+# an argument, the argument is used as the name to a reserved IP
+# address for the master. (In the case of upgrade/repair, we re-use
+# the same IP.)
+#
+# It requires a whole slew of assumed variables, partially due to to
+# the call to write-master-env. Listing them would be rather
+# futile. Instead, we list the required calls to ensure any additional
+# variables are set:
+#   ensure-temp-dir
+#   detect-project
+#   get-bearer-token
+#
+# TODO(andyzheng0831): We are still running master on Debian.
+# Convert master node to use Ubuntu trusty image too.
+function create-master-instance {
+  local address_opt=""
+  [[ -n ${1:-} ]] && address_opt="--address ${1}"
+
+  write-master-env
+  gcloud compute instances create "${MASTER_NAME}" \
+    ${address_opt} \
+    --project "${PROJECT}" \
+    --zone "${ZONE}" \
+    --machine-type "${MASTER_SIZE}" \
+    --image-project="${MASTER_IMAGE_PROJECT}" \
+    --image "${MASTER_IMAGE}" \
+    --tags "${MASTER_TAG}" \
+    --network "${NETWORK}" \
+    --scopes "storage-ro,compute-rw" \
+    --can-ip-forward \
+    --metadata-from-file \
+      "startup-script=${KUBE_ROOT}/cluster/gce/configure-vm.sh,kube-env=${KUBE_TEMP}/master-kube-env.yaml" \
+    --disk "name=${MASTER_NAME}-pd,device-name=master-pd,mode=rw,boot=no,auto-delete=no"
+}
+
+# TODO(andyzheng0831): Make $1 required.
+# TODO(andyzheng0831): Document required vars (for this and call chain).
+# $1 version
+function create-node-instance-template {
+  local suffix=""
+  if [[ -n ${1:-} ]]; then
+    suffix="-${1}"
+  fi
+  create-node-template "${NODE_INSTANCE_PREFIX}-template${suffix}" "${scope_flags[*]}" \
+		"kube-env=${KUBE_TEMP}/node-kube-env.yaml" \
+    "user-data=${KUBE_ROOT}/cluster/gce/trusty/node.yaml"
+}

cluster/gce/trusty/node.yaml

+From nobody Tue Aug 11 10:13:54 2015
+Content-Type: multipart/mixed; boundary="===============6024533374511606659=="
+MIME-Version: 1.0
+
+--===============6024533374511606659==
+MIME-Version: 1.0
+Content-Type: text/upstart-job; charset="us-ascii"
+Content-Transfer-Encoding: 7bit
+Content-Disposition: attachment; filename="kube-env.conf"
+
+#upstart-job
+
+description "Prepare kube node environment"
+
+start on cloud-config
+
+script
+	# Set the hostname to the short version.
+	short_hostname=$(hostname -s)
+	hostname $short_hostname
+
+	# We have seen that GCE image may have strict host firewall rules which drop most inbound/forwarded packets. In such a case, add rules to accept all TCP/UDP packets.
+	if iptables -L INPUT | grep "Chain INPUT (policy DROP)" > /dev/null; then
+		echo "Add rules to accpet all inbound TCP/UDP packets"
+		iptables -A INPUT -w -p TCP -j ACCEPT
+		iptables -A INPUT -w -p UDP -j ACCEPT
+	fi
+	if iptables -L FORWARD | grep "Chain FORWARD (policy DROP)" > /dev/null; then
+		echo "Add rules to accpet all forwarded TCP/UDP packets"
+		iptables -A FORWARD -w -p TCP -j ACCEPT
+		iptables -A FORWARD -w -p UDP -j ACCEPT
+	fi
+	# Create required directories.
+	mkdir -p /var/lib/kubelet
+	mkdir -p /var/lib/kube-proxy
+	mkdir -p /etc/kubernetes/manifests
+
+	# Fetch kube-env from GCE metadata server.
+	curl --fail --silent --show-error \
+		-H "X-Google-Metadata-Request: True" \
+		-o /etc/kube-env \
+		http://metadata.google.internal/computeMetadata/v1/instance/attributes/kube-env
+
+	# Create the kubelet kubeconfig file.
+	. /etc/kube-env
+	cat > /var/lib/kubelet/kubeconfig << EOF
+apiVersion: v1
+kind: Config
+users:
+- name: kubelet
+  user:
+    token: ${KUBELET_TOKEN}
+clusters:
+- name: local
+  cluster:
+    insecure-skip-tls-verify: true
+contexts:
+- context:
+    cluster: local
+    user: kubelet
+  name: service-account-context
+current-context: service-account-context
+EOF
+
+	# Create the kube-proxy config file.
+	cat > /var/lib/kube-proxy/kubeconfig << EOF
+apiVersion: v1
+kind: Config
+users:
+- name: kube-proxy
+  user:
+    token: ${KUBE_PROXY_TOKEN}
+clusters:
+- name: local
+  cluster:
+    insecure-skip-tls-verify: true
+contexts:
+- context:
+    cluster: local
+    user: kube-proxy
+  name: service-account-context
+current-context: service-account-context
+EOF
+end script
+
+--===============6024533374511606659==
+MIME-Version: 1.0
+Content-Type: text/upstart-job; charset="us-ascii"
+Content-Transfer-Encoding: 7bit
+Content-Disposition: attachment; filename="kube-install-packages.conf"
+
+#upstart-job
+
+description "Install packages needed to run kubernetes"
+
+start on cloud-config
+
+script
+	apt-get update
+	# Install docker, brctl, and socat if they are not in the image.
+	if ! which docker > /dev/null; then
+  	echo "Do not find docker. Install it."
+		# We should install the docker that passes qualification. At present, it is version 1.7.1.
+		curl -sSL https://get.docker.com/ubuntu/ | DOCKER_VERSION=1.7.1 sh
+	fi
+	if ! which brctl > /dev/null; then
+		echo "Do not find brctl. Install it."
+		apt-get install --yes bridge-utils
+	fi
+	if ! which socat > /dev/null; then
+		echo "Do not find socat. Install it."
+		apt-get install --yes socat
+	fi
+end script
+
+--===============6024533374511606659==
+MIME-Version: 1.0
+Content-Type: text/upstart-job; charset="us-ascii"
+Content-Transfer-Encoding: 7bit
+Content-Disposition: attachment; filename="kube-install-minion.conf"
+
+#upstart-job
+
+description "Download and install k8s binaries and configurations"
+
+start on stopped kube-env
+
+script
+	. /etc/kube-env
+	# If kubelet or kube-proxy is not stalled in the image, pull release binaries and put them in /usr/bin.
+	if ! which kubelet > /dev/null || ! which kube-proxy > /dev/null; then
+		cd /tmp
+		k8s_sha1="${SERVER_BINARY_TAR_URL##*/}.sha1"
+		echo "Downloading k8s tar sha1 file ${k8s_sha1}"
+		curl -Lo "${k8s_sha1}" --connect-timeout 20 --retry 6 --retry-delay 2 "${SERVER_BINARY_TAR_URL}.sha1"
+		k8s_tar="${SERVER_BINARY_TAR_URL##*/}"
+		echo "Downloading k8s tar file ${k8s_tar}"
+		curl -Lo "${k8s_tar}" --connect-timeout 20 --retry 6 --retry-delay 2 "${SERVER_BINARY_TAR_URL}"
+		# Validate hash.
+		actual=$(sha1sum ${k8s_tar} | awk '{ print $1 }') || true
+		if [ "${actual}" != "${SERVER_BINARY_TAR_HASH}" ]; then
+			echo "== ${k8s_tar} corrupted, sha1 ${actual} doesn't match expected ${SERVER_BINARY_TAR_HASH} =="
+		else
+			echo "Validated ${SERVER_BINARY_TAR_URL} SHA1 = ${SERVER_BINARY_TAR_HASH}"
+		fi
+		tar xzf "/tmp/${k8s_tar}" -C /tmp/ --overwrite
+		cp /tmp/kubernetes/server/bin/kubelet /usr/bin/
+		cp /tmp/kubernetes/server/bin/kube-proxy /usr/bin/
+		rm -rf "/tmp/kubernetes"
+		rm "/tmp/${k8s_tar}"
+		rm "/tmp/${k8s_sha1}"
+	fi
+
+	# Put saltbase configuration files in /etc/saltbase. We will use the add-on yaml files.
+	mkdir -p /etc/saltbase
+	cd /etc/saltbase
+	salt_sha1="${SALT_TAR_URL##*/}.sha1"
+	echo "Downloading Salt tar sha1 file ${salt_sha1}"
+	curl -Lo "${salt_sha1}" --connect-timeout 20 --retry 6 --retry-delay 2 "${SALT_TAR_URL}.sha1"
+	salt_tar="${SALT_TAR_URL##*/}"
+	echo "Downloading Salt tar file ${salt_tar}"
+	curl -Lo "${salt_tar}" --connect-timeout 20 --retry 6 --retry-delay 2 "${SALT_TAR_URL}"
+	# Validate hash.
+	actual=$(sha1sum ${salt_tar} | awk '{ print $1 }') || true
+	if [ "${actual}" != "${SALT_TAR_HASH}" ]; then
+		echo "== ${salt_tar} corrupted, sha1 ${actual} doesn't match expected ${SALT_TAR_HASH} =="
+	else
+		echo "Validated ${SALT_TAR_URL} SHA1 = ${SALT_TAR_HASH}"
+	fi
+	tar xzf "/etc/saltbase/${salt_tar}" -C /etc/saltbase/ --overwrite
+	rm "/etc/saltbase/${salt_sha1}"
+	rm "/etc/saltbase/${salt_tar}"
+end script
+
+--===============6024533374511606659==
+MIME-Version: 1.0
+Content-Type: text/upstart-job; charset="us-ascii"
+Content-Transfer-Encoding: 7bit
+Content-Disposition: attachment; filename="kubelet.conf"
+
+#upstart-job
+
+description "Run kubelet service"
+
+start on stopped kube-install-minion and stopped kube-install-packages
+
+respawn
+
+script
+	# TODO(andyzheng0831): Add health check functionality.
+	. /etc/kube-env
+	/usr/bin/kubelet \
+  	--api_servers=https://${KUBERNETES_MASTER_NAME} \
+		--enable-debugging-handlers=true \
+		--cloud_provider=gce \
+		--config=/etc/kubernetes/manifests \
+		--allow_privileged=false \
+		--v=2 \
+		--cluster_dns=10.0.0.10 \
+		--cluster_domain=cluster.local \
+		--configure-cbr0=true \
+		--cgroup_root=/ \
+		--system-container=/system
+end script
+
+# Wait for 10s to start kubelet again.
+post-stop exec sleep 10
+
+--===============6024533374511606659==
+MIME-Version: 1.0
+Content-Type: text/upstart-job; charset="us-ascii"
+Content-Transfer-Encoding: 7bit
+Content-Disposition: attachment; filename="kube-proxy.conf"
+
+#upstart-job
+
+description "Start kube-proxy service"
+
+start on stopped kube-install-minion and stopped kube-install-packages
+
+respawn
+
+script
+	. /etc/kube-env
+	/usr/bin/kube-proxy \
+		--master=https://${KUBERNETES_MASTER_NAME} \
+		--kubeconfig=/var/lib/kube-proxy/kubeconfig \
+		--v=2
+end script
+
+# Wait for 10s to start kube-proxy again.
+post-stop exec sleep 10
+
+--===============6024533374511606659==
+MIME-Version: 1.0
+Content-Type: text/upstart-job; charset="us-ascii"
+Content-Transfer-Encoding: 7bit
+Content-Disposition: attachment; filename="kube-docker.conf"
+
+#upstart-job
+
+description "Restart docker daemon"
+
+start on started kubelet
+
+script
+	. /etc/kube-env
+	# Assemble docker deamon options
+	echo "DOCKER_OPTS=\"-p /var/run/docker.pid ${EXTRA_DOCKER_OPTS} --log-level=\"debug\" --bridge cbr0 --iptables=false --ip-masq=false\"" > /etc/default/docker
+	# Make sure the network interface cbr0 is created before restarting docker daemon
+	while ! [ -L /sys/class/net/cbr0 ]; do
+		echo "Sleep 1 second to wait for cbr0"
+		sleep 1
+	done
+	initctl restart docker
+	# Remove docker0
+	ifconfig docker0 down
+	brctl delbr docker0
+end script
+
+--===============6024533374511606659==
+MIME-Version: 1.0
+Content-Type: text/upstart-job; charset="us-ascii"
+Content-Transfer-Encoding: 7bit
+Content-Disposition: attachment; filename="kube-addons.conf"
+
+#upstart-job
+
+description "Install kubelet add-on manifest files"
+
+start on stopped kube-docker
+
+script
+	# Configuration files are located at /etc/saltbase.
+	. /etc/kube-env
+	if [ "${ENABLE_NODE_LOGGING}" = "true" ]; then
+		if [ "${LOGGING_DESTINATION}" = "gcp" ]; then
+			cp /etc/saltbase/kubernetes/saltbase/salt/fluentd-gcp/fluentd-gcp.yaml /etc/kubernetes/manifests/
+		elif [ "${LOGGING_DESTINATION}" = "elasticsearch" ]; then
+			cp /etc/saltbase/kubernetes/saltbase/salt/fluentd-es/fluentd-es.yaml /etc/kubernetes/manifests/
+		fi
+	fi
+end script
+
+--===============6024533374511606659==--
+

cluster/gce/util.sh

@@ -22,7 +22,7 @@ KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
 source "${KUBE_ROOT}/cluster/gce/${KUBE_CONFIG_FILE-"config-default.sh"}"
 source "${KUBE_ROOT}/cluster/common.sh"
 
-if [[ "${OS_DISTRIBUTION}" == "debian" || "${OS_DISTRIBUTION}" == "coreos" ]]; then
+if [[ "${OS_DISTRIBUTION}" == "debian" || "${OS_DISTRIBUTION}" == "coreos" || "${OS_DISTRIBUTION}" == "trusty" ]]; then
   source "${KUBE_ROOT}/cluster/gce/${OS_DISTRIBUTION}/helper.sh"
 else
   echo "Cannot operate on cluster using os distro: ${OS_DISTRIBUTION}" >&2
@@ -1196,7 +1196,11 @@ function ssh-to-node {
 
 # Restart the kube-proxy on a node ($1)
 function restart-kube-proxy {
-  ssh-to-node "$1" "sudo /etc/init.d/kube-proxy restart"
+  if [[ "${OS_DISTRIBUTION}" == "trusty" ]]; then
+    ssh-to-node "$1" "sudo initctl restart kube-proxy"
+  else
+    ssh-to-node "$1" "sudo /etc/init.d/kube-proxy restart"
+  fi
 }
 
 # Restart the kube-apiserver on a node ($1)