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@ -30,6 +30,18 @@ command_exists() {
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hash "${1}" 2>/dev/null
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}
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# fetch url using wget or curl and print to stdout
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fetch_url() {
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local url="$1"
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if command_exists wget; then
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curl -sSL "$url"
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elif command_exists curl; then
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wget -qO- "$url"
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else
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error_exit "Couldn't find curl or wget. Bailing out."
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fi
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}
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# Program Functions ------------------------------------------------------------
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# Check host platform and docker host
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@ -78,28 +90,30 @@ verify_prereqs() {
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command_exists docker || error_exit "You need docker"
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if ! docker info > /dev/null 2>&1 ; then
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if ! docker info >/dev/null 2>&1 ; then
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error_exit "Can't connect to 'docker' daemon."
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fi
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if docker inspect kubelet >/dev/null 2>&1 ; then
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error_exit "Kubernetes is already running"
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fi
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$KUBECTL version --client >/dev/null || download_kubectl
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}
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# Get the latest stable release tag
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get_latest_version_number() {
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local -r latest_url="https://storage.googleapis.com/kubernetes-release/release/stable.txt"
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if command_exists wget ; then
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wget -qO- ${latest_url}
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elif command_exists curl ; then
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curl -Ss ${latest_url}
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else
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error_exit "Couldn't find curl or wget. Bailing out."
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local channel="stable"
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if [[ -n "${ALPHA:-}" ]]; then
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channel="latest"
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fi
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local latest_url="https://storage.googleapis.com/kubernetes-release/release/${channel}.txt"
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fetch_url "$latest_url"
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}
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# Detect ip address od docker host
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detect_docker_host_ip() {
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if [ -n "${DOCKER_HOST:-}" ]; then
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if [[ -n "${DOCKER_HOST:-}" ]]; then
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awk -F'[/:]' '{print $4}' <<< "$DOCKER_HOST"
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else
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ifconfig docker0 \
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@ -151,27 +165,33 @@ start_kubernetes() {
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/hyperkube kubelet \
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--containerized \
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--hostname-override="127.0.0.1" \
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--api-servers=http://localhost:8080 \
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--api-servers=http://localhost:${KUBE_PORT} \
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--config=/etc/kubernetes/manifests \
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--allow-privileged=true \
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${dns_args} \
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--v=${LOG_LEVEL} >/dev/null
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until $KUBECTL cluster-info &> /dev/null; do
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sleep 1
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done
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# Create kube-system namespace in kubernetes
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$KUBECTL create namespace kube-system >/dev/null
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# We expect to have at least 3 running pods - etcd, master and kube-proxy.
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local attempt=1
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while (($($KUBECTL get pods --no-headers 2>/dev/null | grep -c "Running") < 3)); do
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while (($(KUBECTL get pods --all-namespaces --no-headers 2>/dev/null | grep -c "Running") < 3)); do
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echo -n "."
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sleep $(( attempt++ ))
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done
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echo
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local end_time=$(date +%s)
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echo "Started master components in $((end_time - start_time)) seconds."
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echo "Started master components in $(($(date +%s) - start_time)) seconds."
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}
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# Open kubernetes master api port.
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setup_firewall() {
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[[ -n "${DOCKER_MACHINE_NAME}" ]] || return
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[[ -n "${DOCKER_MACHINE_NAME:-}" ]] || return
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echo "Adding iptables hackery for docker-machine..."
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@ -184,13 +204,6 @@ setup_firewall() {
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fi
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}
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# Create kube-system namespace in kubernetes
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create_kube_system_namespace() {
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echo "Creating kube-system namespace..."
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$KUBECTL create -f ./scripts/cluster/kube-system.yaml >/dev/null
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}
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# Activate skydns in kubernetes and wait for pods to be ready.
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create_kube_dns() {
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[[ "${ENABLE_CLUSTER_DNS}" = true ]] || return
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@ -209,8 +222,7 @@ create_kube_dns() {
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sleep $(( attempt++ ))
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done
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echo
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local end_time=$(date +%s)
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echo "Started DNS in $((end_time - start_time)) seconds."
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echo "Started DNS in $(($(date +%s) - start_time)) seconds."
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}
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# Generate kubeconfig data for the created cluster.
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@ -231,17 +243,13 @@ generate_kubeconfig() {
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download_kubectl() {
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echo "Downloading kubectl binary..."
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|
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local output="/usr/local/bin/kubectl"
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|
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kubectl_url="https://storage.googleapis.com/kubernetes-release/release/${KUBE_VERSION}/bin/${host_os}/${host_arch}/kubectl"
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|
|
if command_exists wget; then
|
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|
|
wget -O ./bin/kubectl "${kubectl_url}"
|
|
|
|
|
elif command_exists curl; then
|
|
|
|
|
curl -sSOL ./bin/kubectl "${kubectl_url}"
|
|
|
|
|
else
|
|
|
|
|
error_exit "Couldn't find curl or wget. Bailing out."
|
|
|
|
|
fi
|
|
|
|
|
chmod a+x ./bin/kubectl
|
|
|
|
|
fetch_url "${kubectl_url}" > "${output}"
|
|
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|
|
chmod a+x "${output}"
|
|
|
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|
|
KUBECTL=./bin/kubectl
|
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|
|
KUBECTL="${output}"
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|
|
}
|
|
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|
|
# Clean volumes that are left by kubelet
|
|
|
|
|
@ -297,9 +305,8 @@ kube_up() {
|
|
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|
|
clean_volumes
|
|
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|
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setup_firewall
|
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|
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start_kubernetes
|
|
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|
|
generate_kubeconfig
|
|
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|
|
create_kube_system_namespace
|
|
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|
|
start_kubernetes
|
|
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|
|
create_kube_dns
|
|
|
|
|
|
|
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|
|
$KUBECTL cluster-info
|
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|
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Ken Wronkiewicz
8 years ago