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dind-cluster-v1.10.sh
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dind-cluster-v1.10.sh
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#!/bin/bash
# Copyright 2017 Mirantis
#
# 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.
set -o errexit
set -o nounset
set -o pipefail
set -o errtrace
if [ $(uname) = Darwin ]; then
readlinkf(){ perl -MCwd -e 'print Cwd::abs_path shift' "$1";}
else
readlinkf(){ readlink -f "$1"; }
fi
DIND_ROOT="$(cd $(dirname "$(readlinkf "${BASH_SOURCE}")"); pwd)"
RUN_ON_BTRFS_ANYWAY="${RUN_ON_BTRFS_ANYWAY:-}"
if [[ ! ${RUN_ON_BTRFS_ANYWAY} ]] && docker info| grep -q '^Storage Driver: btrfs'; then
echo "ERROR: Docker is using btrfs storage driver which is unsupported by kubeadm-dind-cluster" >&2
echo "Please refer to the documentation for more info." >&2
echo "Set RUN_ON_BTRFS_ANYWAY to non-empty string to continue anyway." >&2
exit 1
fi
# In case of linuxkit / moby linux, -v will not work so we can't
# mount /lib/modules and /boot. Also we'll be using localhost
# to access the apiserver.
using_linuxkit=
if ! docker info|grep -s '^Operating System: .*Docker for Windows' > /dev/null 2>&1 ; then
if docker info|grep -s '^Kernel Version: .*-moby$' >/dev/null 2>&1 ||
docker info|grep -s '^Kernel Version: .*-linuxkit-' > /dev/null 2>&1 ; then
using_linuxkit=1
fi
fi
# Determine when using Linux and docker daemon running locally
using_local_linuxdocker=
if [[ $(uname) == Linux && -z ${DOCKER_HOST:-} ]]; then
using_local_linuxdocker=1
fi
EMBEDDED_CONFIG=y;DIND_IMAGE=mirantis/kubeadm-dind-cluster:v1.10
function dind::find-free-ipv4-subnet() {
local maxIP anAddressInNewSubnet
subnetSize="$1"
maxIP=$( dind::ipv4::find-maximum-claimed-ip )
if [ $maxIP -eq 0 ]
then
echo '10.192.0.0'
return
fi
# maxIP is the highest IP we cannot use (because it already belongs to a subnet)
# One could argue that maxIP+1 could be the MinHost of the subnet we're about to allocate (a.k.a. "new subnet").
# But, consider:
# maxIP: 10.0.0.255
# maybeNextMinHost: 10.0.1.0
# In the above, a subnet size of /16, will start at 10.0.0.0 - which is invalid.
# So we need to start the new subnet at least 32-(subnetSize) IP spaces away.
anAddressInNewSubnet=$(( maxIP + (1<<(32-subnetSize)) ))
# apply mask to get min host
nextMinHost=$(( anAddressInNewSubnet & $(dind::ipv4::netmask "$subnetSize") ))
dind::ipv4::itoa "$nextMinHost"
}
function dind::ipv4::netmask() {
local netmask i
netmask=0
for i in $( seq $(( 32 - $1 )) 32 )
do
netmask=$(( netmask + 2**i ))
done
echo "$netmask"
}
function dind::ipv4::find-maximum-claimed-ip() {
local maxIP upperIPs b m i
maxIP=0
upperIPs="$(
docker network ls --format '{{ .Name }}' | while read -r nw
do
subnet="$( docker network inspect "$nw" --format "{{ range .IPAM.Config }}{{ .Subnet }}{{ end }}" )"
if [ -z "$subnet" ]
then
continue
fi
IFS='/' read -r b m <<<"$subnet"
echo $(( $(dind::ipv4::atoi "$b") + (1<<(32-m)) - 1 ))
done
)"
for i in $upperIPs
do
if [ "$(( i - maxIP ))" -gt 1 ]
then
maxIP="$i"
fi
done
echo "$maxIP"
}
function dind::ipv4::itoa() {
echo -n $(( ($1 / 256 / 256 / 256) % 256)).
echo -n $(( ($1 / 256 / 256) % 256 )).
echo -n $(( ($1 / 256) % 256 )).
echo $(( $1 % 256 ))
}
function dind::ipv4::atoi() {
local ip="$1"
local ret=0
for (( i=0 ; i<4 ; ++i ))
do
(( ret += ${ip%%.*} * ( 256**(3-i) ) ))
ip=${ip#*.}
done
echo $ret
}
function dind::localhost() {
if [[ ${IP_MODE} = "ipv6" ]]; then
echo '[::1]'
else
echo '127.0.0.1'
fi
}
function dind::sha1 {
# shellcheck disable=SC2046
set -- $( echo -n "$@" | sha1sum )
echo "$1"
}
function dind::clusterSuffix {
if [ "$DIND_LABEL" != "$DEFAULT_DIND_LABEL" ]; then
echo "-$( dind::sha1 "$DIND_LABEL" )"
else
echo ''
fi
}
function dind::net-name {
echo "kubeadm-dind-net$( dind::clusterSuffix )"
}
function dind::extract-ipv4-subnet() {
# If only one subnet, there may be a leading space in list of subnets
local trimmed="$( echo "$1" | sed -e 's/^[[:space:]]*//')"
IFS=' ' read -ra subnets <<< "${trimmed}"
for subnet in "${subnets[@]}"; do
if [[ -z "${subnet}" || "${subnet}" =~ ":" ]]; then
continue # Empty or IPv6 CIDR
fi
IFS='/' read -r DIND_SUBNET DIND_SUBNET_SIZE <<<"${subnet}"
return
done
echo "ERROR: Unable to extract subnet for $( dind::net-name ) - aborting..."
exit 1
}
function dind::find-or-create-ipv4-dind-subnet() {
local output
local err_result=0
local net_name="$( dind::net-name )"
output="$(
docker network inspect "$net_name" \
--format '{{ range .IPAM.Config }} {{ .Subnet }}{{ end }}' 2>/dev/null \
| head -1
)" || err_result=$?
if [[ ${err_result} -eq 0 ]]; then # subnet exists, get info
dind::extract-ipv4-subnet "$output"
else # Pick a free subnet
DIND_SUBNET_SIZE="${DIND_SUBNET_SIZE:-16}"
DIND_SUBNET="${DIND_SUBNET:-$( dind::find-free-ipv4-subnet "${DIND_SUBNET_SIZE}" )}"
fi
}
IP_MODE="${IP_MODE:-ipv4}" # ipv4, ipv6, (future) dualstack
if [[ ! ${EMBEDDED_CONFIG:-} ]]; then
source "${DIND_ROOT}/config.sh"
fi
DEFAULT_DIND_LABEL='mirantis.kubeadm_dind_cluster_runtime'
: "${DIND_LABEL:=${DEFAULT_DIND_LABEL}}"
CNI_PLUGIN="${CNI_PLUGIN:-bridge}"
ETCD_HOST="${ETCD_HOST:-127.0.0.1}"
GCE_HOSTED="${GCE_HOSTED:-}"
DIND_ALLOW_AAAA_USE="${DIND_ALLOW_AAAA_USE:-}" # Default is to use DNS64 always for IPv6 mode
if [[ ${IP_MODE} = "ipv6" ]]; then
DIND_SUBNET="${DIND_SUBNET:-fd00:10::}"
dind_ip_base="${DIND_SUBNET}"
ETCD_HOST="::1"
KUBE_RSYNC_ADDR="${KUBE_RSYNC_ADDR:-::1}"
SERVICE_CIDR="${SERVICE_CIDR:-fd00:10:30::/110}"
DIND_SUBNET_SIZE="${DIND_SUBNET_SIZE:-64}"
REMOTE_DNS64_V4SERVER="${REMOTE_DNS64_V4SERVER:-8.8.8.8}"
LOCAL_NAT64_SERVER="${DIND_SUBNET}200"
NAT64_V4_SUBNET_PREFIX="${NAT64_V4_SUBNET_PREFIX:-172.18}"
DNS64_PREFIX="${DNS64_PREFIX:-fd00:10:64:ff9b::}"
DNS64_PREFIX_SIZE="${DNS64_PREFIX_SIZE:-96}"
DNS64_PREFIX_CIDR="${DNS64_PREFIX}/${DNS64_PREFIX_SIZE}"
dns_server="${dind_ip_base}100"
DEFAULT_POD_NETWORK_CIDR="fd00:10:20::/72"
USE_HAIRPIN="${USE_HAIRPIN:-true}" # Default is to use hairpin for IPv6
if [[ ${DIND_ALLOW_AAAA_USE} && ${GCE_HOSTED} ]]; then
echo "ERROR! GCE does not support use of IPv6 for external addresses - aborting."
exit 1
fi
else
dind::find-or-create-ipv4-dind-subnet
KUBE_RSYNC_ADDR="${KUBE_RSYNC_ADDR:-127.0.0.1}"
SERVICE_CIDR="${SERVICE_CIDR:-10.96.0.0/12}"
dns_server="${REMOTE_DNS64_V4SERVER:-8.8.8.8}"
DEFAULT_POD_NETWORK_CIDR="10.244.0.0/16"
USE_HAIRPIN="${USE_HAIRPIN:-false}" # Disabled for IPv4, as issue with Virtlet networking
if [[ ${DIND_ALLOW_AAAA_USE} ]]; then
echo "WARNING! The DIND_ALLOW_AAAA_USE option is for IPv6 mode - ignoring setting."
DIND_ALLOW_AAAA_USE=
fi
if [[ ${CNI_PLUGIN} = "calico" || ${CNI_PLUGIN} = "calico-kdd" ]]; then
DEFAULT_POD_NETWORK_CIDR="192.168.0.0/16"
fi
fi
dns_prefix="$(echo ${SERVICE_CIDR} | sed 's,/.*,,')"
if [[ ${IP_MODE} != "ipv6" ]]; then
dns_prefix="$(echo ${dns_prefix} | sed 's/0$//')"
DNS_SVC_IP="${dns_prefix}10"
else
DNS_SVC_IP="${dns_prefix}a"
fi
POD_NETWORK_CIDR="${POD_NETWORK_CIDR:-${DEFAULT_POD_NETWORK_CIDR}}"
if [[ ${IP_MODE} = "ipv6" ]]; then
# For IPv6 will extract the network part and size from pod cluster CIDR.
# The size will be increased by eight, as the pod network will be split
# into subnets for each node. The network part will be converted into a
# prefix that will get the node ID appended, for each node. In some cases
# this means padding the prefix. In other cases, the prefix must be
# trimmed, so that when the node ID is added, it forms a correct prefix.
POD_NET_PREFIX="$(echo ${POD_NETWORK_CIDR} | sed 's,::/.*,:,')"
cluster_size="$(echo ${POD_NETWORK_CIDR} | sed 's,.*::/,,')"
POD_NET_SIZE=$((${cluster_size}+8))
num_colons="$(grep -o ":" <<< "${POD_NET_PREFIX}" | wc -l)"
need_zero_pads=$((${cluster_size}/16))
# Will be replacing lowest byte with node ID, so pull off last byte and colon
if [[ ${num_colons} -gt ${need_zero_pads} ]]; then
POD_NET_PREFIX=${POD_NET_PREFIX::-3}
fi
# Add in zeros to pad 16 bits at a time, up to the padding needed, which is
# need_zero_pads - num_colons.
while [ ${num_colons} -lt ${need_zero_pads} ]; do
POD_NET_PREFIX+="0:"
num_colons+=1
done
elif [[ ${CNI_PLUGIN} = "bridge" || ${CNI_PLUGIN} = "ptp" ]]; then # IPv4, bridge or ptp
# For IPv4, will assume user specifies /16 CIDR and will use a /24 subnet
# on each node.
POD_NET_PREFIX="$(echo ${POD_NETWORK_CIDR} | sed 's/^\([0-9]*\.[0-9]*\.\).*/\1/')"
POD_NET_SIZE=24
else
POD_NET_PREFIX=
POD_NET_SIZE=
fi
DIND_IMAGE="${DIND_IMAGE:-}"
BUILD_KUBEADM="${BUILD_KUBEADM:-}"
BUILD_HYPERKUBE="${BUILD_HYPERKUBE:-}"
KUBEADM_SOURCE="${KUBEADM_SOURCE-}"
HYPERKUBE_SOURCE="${HYPERKUBE_SOURCE-}"
NUM_NODES=${NUM_NODES:-2}
EXTRA_PORTS="${EXTRA_PORTS:-}"
LOCAL_KUBECTL_VERSION=${LOCAL_KUBECTL_VERSION:-}
KUBECTL_DIR="${KUBECTL_DIR:-${HOME}/.kubeadm-dind-cluster}"
DASHBOARD_URL="${DASHBOARD_URL:-https://rawgit.com/kubernetes/dashboard/bfab10151f012d1acc5dfb1979f3172e2400aa3c/src/deploy/kubernetes-dashboard.yaml}"
SKIP_SNAPSHOT="${SKIP_SNAPSHOT:-}"
E2E_REPORT_DIR="${E2E_REPORT_DIR:-}"
DIND_NO_PARALLEL_E2E="${DIND_NO_PARALLEL_E2E:-}"
DNS_SERVICE="${DNS_SERVICE:-kube-dns}"
DIND_CA_CERT_URL="${DIND_CA_CERT_URL:-}"
DIND_PROPAGATE_HTTP_PROXY="${DIND_PROPAGATE_HTTP_PROXY:-}"
DIND_HTTP_PROXY="${DIND_HTTP_PROXY:-}"
DIND_HTTPS_PROXY="${DIND_HTTPS_PROXY:-}"
DIND_NO_PROXY="${DIND_NO_PROXY:-}"
DIND_DAEMON_JSON_FILE="${DIND_DAEMON_JSON_FILE:-/etc/docker/daemon.json}" # can be set to /dev/null
DIND_REGISTRY_MIRROR="${DIND_REGISTRY_MIRROR:-}" # plain string format
DIND_INSECURE_REGISTRIES="${DIND_INSECURE_REGISTRIES:-}" # json list format
FEATURE_GATES="${FEATURE_GATES:-MountPropagation=true}"
# you can set special value 'none' not to set any kubelet's feature gates.
KUBELET_FEATURE_GATES="${KUBELET_FEATURE_GATES:-MountPropagation=true,DynamicKubeletConfig=true}"
if [[ ! ${LOCAL_KUBECTL_VERSION:-} && ${DIND_IMAGE:-} =~ :(v[0-9]+\.[0-9]+)$ ]]; then
LOCAL_KUBECTL_VERSION="${BASH_REMATCH[1]}"
fi
# TODO: Test multi-cluster for IPv6, before enabling
if [[ "${DIND_LABEL}" != "${DEFAULT_DIND_LABEL}" && "${IP_MODE}" != 'ipv4' ]]; then
echo "Multiple parallel clusters currently not supported for non-IPv4 mode" >&2
exit 1
fi
# not configurable for now, would need to setup context for kubectl _inside_ the cluster
readonly INTERNAL_APISERVER_PORT=8080
function dind::need-source {
if [[ ! -f cluster/kubectl.sh ]]; then
echo "$0 must be called from the Kubernetes repository root directory" 1>&2
exit 1
fi
}
build_tools_dir="build"
use_k8s_source=y
if [[ ! ${BUILD_KUBEADM} && ! ${BUILD_HYPERKUBE} ]]; then
use_k8s_source=
fi
if [[ ${use_k8s_source} ]]; then
dind::need-source
kubectl=cluster/kubectl.sh
if [[ ! -f ${build_tools_dir}/common.sh ]]; then
build_tools_dir="build-tools"
fi
else
if [[ ! ${LOCAL_KUBECTL_VERSION:-} ]] && ! hash kubectl 2>/dev/null; then
echo "You need kubectl binary in your PATH to use prebuilt DIND image" 1>&2
exit 1
fi
kubectl=kubectl
fi
function dind::retry {
# based on retry function in hack/jenkins/ scripts in k8s source
for i in {1..10}; do
"$@" && return 0 || sleep ${i}
done
"$@"
}
busybox_image="busybox:1.26.2"
e2e_base_image="golang:1.9.2"
sys_volume_args=()
build_volume_args=()
function dind::set-build-volume-args {
if [ ${#build_volume_args[@]} -gt 0 ]; then
return 0
fi
build_container_name=
if [ -n "${KUBEADM_DIND_LOCAL:-}" ]; then
build_volume_args=(-v "$PWD:/go/src/k8s.io/kubernetes")
else
build_container_name="$(KUBE_ROOT=${PWD} ETCD_HOST=${ETCD_HOST} &&
. ${build_tools_dir}/common.sh &&
kube::build::verify_prereqs >&2 &&
echo "${KUBE_DATA_CONTAINER_NAME:-${KUBE_BUILD_DATA_CONTAINER_NAME}}")"
build_volume_args=(--volumes-from "${build_container_name}")
fi
}
function dind::volume-exists {
local name="$1"
if docker volume inspect "${name}" >& /dev/null; then
return 0
fi
return 1
}
function dind::create-volume {
local name="$1"
docker volume create --label "${DIND_LABEL}" --name "${name}" >/dev/null
}
# We mount /boot and /lib/modules into the container
# below to in case some of the workloads need them.
# This includes virtlet, for instance. Also this may be
# useful in future if we want DIND nodes to pass
# preflight checks.
# Unfortunately we can't do this when using Mac Docker
# (unless a remote docker daemon on Linux is used)
# NB: there's no /boot on recent Mac dockers
function dind::prepare-sys-mounts {
if [[ ! ${using_linuxkit} ]]; then
sys_volume_args=()
if [[ -d /boot ]]; then
sys_volume_args+=(-v /boot:/boot)
fi
if [[ -d /lib/modules ]]; then
sys_volume_args+=(-v /lib/modules:/lib/modules)
fi
return 0
fi
local dind_sys_vol_name
dind_sys_vol_name="kubeadm-dind-sys$( dind::clusterSuffix )"
if ! dind::volume-exists "$dind_sys_vol_name"; then
dind::step "Saving a copy of docker host's /lib/modules"
dind::create-volume "$dind_sys_vol_name"
# Use a dirty nsenter trick to fool Docker on Mac and grab system
# /lib/modules into sys.tar file on kubeadm-dind-sys volume.
local nsenter="nsenter --mount=/proc/1/ns/mnt --"
docker run \
--rm \
--privileged \
-v "$dind_sys_vol_name":/dest \
--pid=host \
"${busybox_image}" \
/bin/sh -c \
"if ${nsenter} test -d /lib/modules; then ${nsenter} tar -C / -c lib/modules >/dest/sys.tar; fi"
fi
sys_volume_args=(-v "$dind_sys_vol_name":/dind-sys)
}
tmp_containers=()
function dind::cleanup {
if [ ${#tmp_containers[@]} -gt 0 ]; then
for name in "${tmp_containers[@]}"; do
docker rm -vf "${name}" 2>/dev/null
done
fi
}
trap dind::cleanup EXIT
function dind::check-image {
local name="$1"
if docker inspect --format 'x' "${name}" >&/dev/null; then
return 0
else
return 1
fi
}
function dind::filter-make-output {
# these messages make output too long and make Travis CI choke
egrep -v --line-buffered 'I[0-9][0-9][0-9][0-9] .*(parse|conversion|defaulter|deepcopy)\.go:[0-9]+\]'
}
function dind::run-build-command {
# this is like build/run.sh, but it doesn't rsync back the binaries,
# only the generated files.
local cmd=("$@")
(
# The following is taken from build/run.sh and build/common.sh
# of Kubernetes source tree. It differs in
# --filter='+ /_output/dockerized/bin/**'
# being removed from rsync
. ${build_tools_dir}/common.sh
kube::build::verify_prereqs
kube::build::build_image
kube::build::run_build_command "$@"
kube::log::status "Syncing out of container"
kube::build::start_rsyncd_container
local rsync_extra=""
if (( ${KUBE_VERBOSE} >= 6 )); then
rsync_extra="-iv"
fi
# The filter syntax for rsync is a little obscure. It filters on files and
# directories. If you don't go in to a directory you won't find any files
# there. Rules are evaluated in order. The last two rules are a little
# magic. '+ */' says to go in to every directory and '- /**' says to ignore
# any file or directory that isn't already specifically allowed.
#
# We are looking to copy out all of the built binaries along with various
# generated files.
kube::build::rsync \
--filter='- /vendor/' \
--filter='- /_temp/' \
--filter='+ zz_generated.*' \
--filter='+ generated.proto' \
--filter='+ *.pb.go' \
--filter='+ types.go' \
--filter='+ */' \
--filter='- /**' \
"rsync://k8s@${KUBE_RSYNC_ADDR}/k8s/" "${KUBE_ROOT}"
kube::build::stop_rsyncd_container
)
}
function dind::make-for-linux {
local copy="$1"
shift
dind::step "Building binaries:" "$*"
if [ -n "${KUBEADM_DIND_LOCAL:-}" ]; then
dind::step "+ make WHAT=\"$*\""
make WHAT="$*" 2>&1 | dind::filter-make-output
elif [ "${copy}" = "y" ]; then
dind::step "+ ${build_tools_dir}/run.sh make WHAT=\"$*\""
"${build_tools_dir}/run.sh" make WHAT="$*" 2>&1 | dind::filter-make-output
else
dind::step "+ [using the build container] make WHAT=\"$*\""
dind::run-build-command make WHAT="$*" 2>&1 | dind::filter-make-output
fi
}
function dind::check-binary {
local filename="$1"
local dockerized="_output/dockerized/bin/linux/amd64/${filename}"
local plain="_output/local/bin/linux/amd64/${filename}"
dind::set-build-volume-args
# FIXME: don't hardcode amd64 arch
if [ -n "${KUBEADM_DIND_LOCAL:-${force_local:-}}" ]; then
if [ -f "${dockerized}" -o -f "${plain}" ]; then
return 0
fi
elif docker run --rm "${build_volume_args[@]}" \
"${busybox_image}" \
test -f "/go/src/k8s.io/kubernetes/${dockerized}" >&/dev/null; then
return 0
fi
return 1
}
function dind::ensure-downloaded-kubectl {
local kubectl_url
local kubectl_sha1
local kubectl_sha1_linux
local kubectl_sha1_darwin
local kubectl_link
local kubectl_os
local full_kubectl_version
case "${LOCAL_KUBECTL_VERSION}" in
v1.8)
full_kubectl_version=v1.8.15
kubectl_sha1_linux=52a1ee321e1e8c0ecfd6e83c38bf972c2c60adf2
kubectl_sha1_darwin=ac3f823d7aa104237929a1e35ea400c6aa3cc356
;;
v1.9)
full_kubectl_version=v1.9.9
kubectl_sha1_linux=c8163a6360119c56d163fbd8cef8727e9841e712
kubectl_sha1_darwin=09585552eb7616954481789489ec382c633a0162
;;
v1.10)
full_kubectl_version=v1.10.5
kubectl_sha1_linux=dbe431b2684f8ff4188335b3b3cea185d5a9ec44
kubectl_sha1_darwin=08e58440949c71053b45bfadf80532ea3d752d12
;;
v1.11)
full_kubectl_version=v1.11.0
kubectl_sha1_linux=e23f251ca0cb848802f3cb0f69a4ba297d07bfc6
kubectl_sha1_darwin=6eff29a328c4bc00879fd6a0c8b33690c6f75908
;;
"")
return 0
;;
*)
echo "Invalid kubectl version" >&2
exit 1
esac
export PATH="${KUBECTL_DIR}:$PATH"
if [ $(uname) = Darwin ]; then
kubectl_sha1="${kubectl_sha1_darwin}"
kubectl_os=darwin
else
kubectl_sha1="${kubectl_sha1_linux}"
kubectl_os=linux
fi
local link_target="kubectl-${full_kubectl_version}"
local link_name="${KUBECTL_DIR}"/kubectl
if [[ -h "${link_name}" && "$(readlink "${link_name}")" = "${link_target}" ]]; then
return 0
fi
local path="${KUBECTL_DIR}/${link_target}"
if [[ ! -f "${path}" ]]; then
mkdir -p "${KUBECTL_DIR}"
curl -sSLo "${path}" "https://storage.googleapis.com/kubernetes-release/release/${full_kubectl_version}/bin/${kubectl_os}/amd64/kubectl"
echo "${kubectl_sha1} ${path}" | sha1sum -c
chmod +x "${path}"
fi
ln -fs "${link_target}" "${KUBECTL_DIR}/kubectl"
}
function dind::ensure-kubectl {
if [[ ! ${use_k8s_source} ]]; then
# already checked on startup
dind::ensure-downloaded-kubectl
return 0
fi
if [ $(uname) = Darwin ]; then
if [ ! -f _output/local/bin/darwin/amd64/kubectl ]; then
dind::step "Building kubectl"
dind::step "+ make WHAT=cmd/kubectl"
make WHAT=cmd/kubectl 2>&1 | dind::filter-make-output
fi
elif ! force_local=y dind::check-binary kubectl; then
dind::make-for-linux y cmd/kubectl
fi
}
function dind::ensure-binaries {
local -a to_build=()
for name in "$@"; do
if ! dind::check-binary "$(basename "${name}")"; then
to_build+=("${name}")
fi
done
if [ "${#to_build[@]}" -gt 0 ]; then
dind::make-for-linux n "${to_build[@]}"
fi
return 0
}
function dind::ensure-network {
if ! docker network inspect $(dind::net-name) >&/dev/null; then
local node_ip="$(dind::node-ip 1)"
local v6settings=""
if [[ ${IP_MODE} = "ipv6" ]]; then
# Need second network for NAT64
v6settings="--subnet=${NAT64_V4_SUBNET_PREFIX}.0.0/16 --ipv6"
fi
docker network create \
${v6settings} \
--subnet="${DIND_SUBNET}/${DIND_SUBNET_SIZE}" \
--gateway="${node_ip}" \
$(dind::net-name) >/dev/null
fi
}
function dind::ensure-volume {
local reuse_volume=
if [[ $1 = -r ]]; then
reuse_volume=1
shift
fi
local name="$1"
if dind::volume-exists "${name}"; then
if [[ ! ${reuse_volume} ]]; then
docker volume rm "${name}" >/dev/null
fi
elif [[ ${reuse_volume} ]]; then
echo "*** Failed to locate volume: ${name}" 1>&2
return 1
fi
dind::create-volume "${name}"
}
function dind::ensure-dns {
if [[ ${IP_MODE} = "ipv6" ]]; then
if ! docker inspect bind9 >&/dev/null; then
local force_dns64_for=""
if [[ ! ${DIND_ALLOW_AAAA_USE} ]]; then
# Normally, if have an AAAA record, it is used. This clause tells
# bind9 to do ignore AAAA records for the specified networks
# and/or addresses and lookup A records and synthesize new AAAA
# records. In this case, we select "any" networks that have AAAA
# records meaning we ALWAYS use A records and do NAT64.
force_dns64_for="exclude { any; };"
fi
read -r -d '' bind9_conf <<BIND9_EOF
options {
directory "/var/bind";
allow-query { any; };
forwarders {
${DNS64_PREFIX}${REMOTE_DNS64_V4SERVER};
};
auth-nxdomain no; # conform to RFC1035
listen-on-v6 { any; };
dns64 ${DNS64_PREFIX_CIDR} {
${force_dns64_for}
};
};
BIND9_EOF
docker run -d --name bind9 --hostname bind9 --net "$(dind::net-name)" --label "dind-support" \
--sysctl net.ipv6.conf.all.disable_ipv6=0 --sysctl net.ipv6.conf.all.forwarding=1 \
--privileged=true --ip6 ${dns_server} --dns ${dns_server} \
-e bind9_conf="${bind9_conf}" \
diverdane/bind9:latest /bin/sh -c 'echo "${bind9_conf}" >/named.conf && named -c /named.conf -g -u named' >/dev/null
ipv4_addr="$(docker exec bind9 ip addr list eth0 | grep "inet" | awk '$1 == "inet" {print $2}')"
docker exec bind9 ip addr del ${ipv4_addr} dev eth0
docker exec bind9 ip -6 route add ${DNS64_PREFIX_CIDR} via ${LOCAL_NAT64_SERVER}
fi
fi
}
function dind::ensure-nat {
if [[ ${IP_MODE} = "ipv6" ]]; then
if ! docker ps | grep tayga >&/dev/null; then
docker run -d --name tayga --hostname tayga --net "$(dind::net-name)" --label "dind-support" \
--sysctl net.ipv6.conf.all.disable_ipv6=0 --sysctl net.ipv6.conf.all.forwarding=1 \
--privileged=true --ip ${NAT64_V4_SUBNET_PREFIX}.0.200 --ip6 ${LOCAL_NAT64_SERVER} --dns ${REMOTE_DNS64_V4SERVER} --dns ${dns_server} \
-e TAYGA_CONF_PREFIX=${DNS64_PREFIX_CIDR} -e TAYGA_CONF_IPV4_ADDR=${NAT64_V4_SUBNET_PREFIX}.0.200 \
-e TAYGA_CONF_DYNAMIC_POOL=${NAT64_V4_SUBNET_PREFIX}.0.128/25 danehans/tayga:latest >/dev/null
# Need to check/create, as "clean" may remove route
local route="$(ip route | egrep "^${NAT64_V4_SUBNET_PREFIX}.0.128/25")"
if [[ -z "${route}" ]]; then
docker run --net=host --rm --privileged ${busybox_image} ip route add ${NAT64_V4_SUBNET_PREFIX}.0.128/25 via ${NAT64_V4_SUBNET_PREFIX}.0.200
fi
fi
fi
}
function dind::run {
local reuse_volume=
if [[ $1 = -r ]]; then
reuse_volume="-r"
shift
fi
local container_name="${1:-}"
local ip="${2:-}"
local node_id="${3:-}"
local portforward="${4:-}"
if [[ $# -gt 4 ]]; then
shift 4
else
shift $#
fi
local ip_arg="--ip"
if [[ ${IP_MODE} = "ipv6" ]]; then
ip_arg="--ip6"
fi
local -a opts=("${ip_arg}" "${ip}" "$@")
local -a args=("systemd.setenv=CNI_PLUGIN=${CNI_PLUGIN}")
args+=("systemd.setenv=IP_MODE=${IP_MODE}")
if [[ ${IP_MODE} = "ipv6" ]]; then
opts+=(--sysctl net.ipv6.conf.all.disable_ipv6=0)
opts+=(--sysctl net.ipv6.conf.all.forwarding=1)
opts+=(--dns ${dns_server})
args+=("systemd.setenv=DNS64_PREFIX_CIDR=${DNS64_PREFIX_CIDR}")
args+=("systemd.setenv=LOCAL_NAT64_SERVER=${LOCAL_NAT64_SERVER}")
# For prefix, if node ID will be in the upper byte, push it over
if [[ $((${POD_NET_SIZE} % 16)) -ne 0 ]]; then
node_id=$(printf "%02x00\n" "${node_id}")
else
if [[ "${POD_NET_PREFIX: -1}" = ":" ]]; then
node_id=$(printf "%x\n" "${node_id}")
else
node_id=$(printf "%02x\n" "${node_id}") # In lower byte, so ensure two chars
fi
fi
fi
if [[ ${POD_NET_PREFIX} ]]; then
args+=("systemd.setenv=POD_NET_PREFIX=${POD_NET_PREFIX}${node_id}")
fi
args+=("systemd.setenv=POD_NET_SIZE=${POD_NET_SIZE}")
args+=("systemd.setenv=USE_HAIRPIN=${USE_HAIRPIN}")
args+=("systemd.setenv=DNS_SVC_IP=${DNS_SVC_IP}")
args+=("systemd.setenv=DNS_SERVICE=${DNS_SERVICE}")
if [[ ! "${container_name}" ]]; then
echo >&2 "Must specify container name"
exit 1
fi
# remove any previously created containers with the same name
docker rm -vf "${container_name}" >&/dev/null || true
if [[ "${portforward}" ]]; then
IFS=';' read -ra array <<< "${portforward}"
for element in "${array[@]}"; do
opts+=(-p "${element}")
done
fi
opts+=(${sys_volume_args[@]+"${sys_volume_args[@]}"})
dind::step "Starting DIND container:" "${container_name}"
if [[ ! ${using_linuxkit} ]]; then
opts+=(-v /boot:/boot -v /lib/modules:/lib/modules)
fi
local volume_name="kubeadm-dind-${container_name}"
dind::ensure-network
dind::ensure-volume ${reuse_volume} "${volume_name}"
dind::ensure-nat
dind::ensure-dns
# TODO: create named volume for binaries and mount it to /k8s
# in case of the source build
# Start the new container.
docker run \
-e IP_MODE="${IP_MODE}" \
-e KUBEADM_SOURCE="${KUBEADM_SOURCE}" \
-e HYPERKUBE_SOURCE="${HYPERKUBE_SOURCE}" \
-d --privileged \
--net "$(dind::net-name)" \
--name "${container_name}" \
--hostname "${container_name}" \
-l "${DIND_LABEL}" \
-v "${volume_name}:/dind" \
${opts[@]+"${opts[@]}"} \
"${DIND_IMAGE}" \
${args[@]+"${args[@]}"}
}
function dind::kubeadm {
local container_id="$1"
shift
dind::step "Running kubeadm:" "$*"
status=0
# See image/bare/wrapkubeadm.
# Capturing output is necessary to grab flags for 'kubeadm join'
kubelet_feature_gates="-e KUBELET_FEATURE_GATES=${KUBELET_FEATURE_GATES}"
if ! docker exec ${kubelet_feature_gates} "${container_id}" /usr/local/bin/wrapkubeadm "$@" 2>&1 | tee /dev/fd/2; then
echo "*** kubeadm failed" >&2
return 1
fi
return ${status}
}
# function dind::bare {
# local container_name="${1:-}"
# if [[ ! "${container_name}" ]]; then
# echo >&2 "Must specify container name"
# exit 1
# fi
# shift
# run_opts=(${@+"$@"})
# dind::run "${container_name}"
# }
function dind::configure-kubectl {
dind::step "Setting cluster config"
local host="$(dind::localhost)"
local context_name cluster_name
context_name="$(dind::context-name)"
cluster_name="$(dind::context-name)"
"${kubectl}" config set-cluster "$cluster_name" \
--server="http://${host}:$(dind::apiserver-port)" \
--insecure-skip-tls-verify=true
"${kubectl}" config set-context "$context_name" --cluster="$cluster_name"
if [[ ${DIND_LABEL} = ${DEFAULT_DIND_LABEL} ]]; then
# Single cluster mode
"${kubectl}" config use-context "$context_name"
fi
}
force_make_binaries=
function dind::set-master-opts {
master_opts=()
if [[ ${BUILD_KUBEADM} || ${BUILD_HYPERKUBE} ]]; then
# share binaries pulled from the build container between nodes
local dind_k8s_bin_vol_name
dind_k8s_bin_vol_name="dind-k8s-binaries$(dind::clusterSuffix)"
dind::ensure-volume "${dind_k8s_bin_vol_name}"
dind::set-build-volume-args
master_opts+=("${build_volume_args[@]}" -v "${dind_k8s_bin_vol_name}:/k8s")
local -a bins
if [[ ${BUILD_KUBEADM} ]]; then
master_opts+=(-e KUBEADM_SOURCE=build://)
bins+=(cmd/kubeadm)
else
master_opts+=(-e ${KUBEADM_SOURCE})
fi
if [[ ${BUILD_HYPERKUBE} ]]; then
master_opts+=(-e HYPERKUBE_SOURCE=build://)
bins+=(cmd/hyperkube)
fi
if [[ ${force_make_binaries} ]]; then
dind::make-for-linux n "${bins[@]}"
else
dind::ensure-binaries "${bins[@]}"
fi
fi
if [[ ${MASTER_EXTRA_OPTS:-} ]]; then
master_opts+=( ${MASTER_EXTRA_OPTS} )
fi
}
function dind::ensure-dashboard-clusterrolebinding {
local ctx
ctx="$(dind::context-name)"
# 'create' may cause etcd timeout, yet create the clusterrolebinding.
# So use 'apply' to actually create it
"${kubectl}" --context "$ctx" create clusterrolebinding add-on-cluster-admin \
--clusterrole=cluster-admin \
--serviceaccount=kube-system:default \
-o json --dry-run |
docker exec -i "$(dind::master-name)" jq '.apiVersion="rbac.authorization.k8s.io/v1beta1"|.kind|="ClusterRoleBinding"' |
"${kubectl}" --context "$ctx" apply -f -
}
function dind::deploy-dashboard {
dind::step "Deploying k8s dashboard"
dind::retry "${kubectl}" --context "$(dind::context-name)" apply -f "${DASHBOARD_URL}"
# https://kubernetes-io-vnext-staging.netlify.com/docs/admin/authorization/rbac/#service-account-permissions
# Thanks @liggitt for the hint
dind::retry dind::ensure-dashboard-clusterrolebinding
}
function dind::kubeadm-version {
if [[ ${use_k8s_source} ]]; then
(cluster/kubectl.sh version --short 2>/dev/null || true) |
grep Client |
sed 's/^.*: v\([0-9.]*\).*/\1/'
else
docker exec "$(dind::master-name)" \
/bin/bash -c 'kubeadm version -o json | jq -r .clientVersion.gitVersion' |
sed 's/^v\([0-9.]*\).*/\1/'
fi
}
function dind::kubeadm-skip-checks-flag {
kubeadm_version="$(dind::kubeadm-version)"
if [[ ${kubeadm_version} =~ 1\.8\. ]]; then
echo -n "--skip-preflight-checks"
else
echo -n "--ignore-preflight-errors=all"
fi
}
function dind::init {
local -a opts
dind::set-master-opts
local local_host master_name container_id
master_name="$(dind::master-name)"
local_host="$( dind::localhost )"
container_id=$(dind::run "${master_name}" "$(dind::master-ip)" 1 "${local_host}:$(dind::apiserver-port):${INTERNAL_APISERVER_PORT}" ${master_opts[@]+"${master_opts[@]}"})
# FIXME: I tried using custom tokens with 'kubeadm ex token create' but join failed with:
# 'failed to parse response as JWS object [square/go-jose: compact JWS format must have three parts]'
# So we just pick the line from 'kubeadm init' output
# Using a template file in the image to build a kubeadm.conf file and to customize
# it based on CNI plugin, IP mode, and environment settings. User can add additional
# customizations to template and then rebuild the image used (build/build-local.sh).
local pod_subnet_disable="# "
# TODO: May want to specify each of the plugins that require --pod-network-cidr
if [[ ${CNI_PLUGIN} != "bridge" && ${CNI_PLUGIN} != "ptp" ]]; then
pod_subnet_disable=""
fi
local bind_address="0.0.0.0"
if [[ ${IP_MODE} = "ipv6" ]]; then
bind_address="::"
fi
dind::proxy "$master_name"
dind::custom-docker-opts "$master_name"
# HACK: Indicating mode, so that wrapkubeadm will not set a cluster CIDR for kube-proxy
# in IPv6 (only) mode.
if [[ ${IP_MODE} = "ipv6" ]]; then
docker exec --privileged -i "$master_name" touch /v6-mode
fi
feature_gates="{}"
if [[ ${DNS_SERVICE} == "coredns" ]]; then
# can't just use 'CoreDNS: false' because
# it'll break k8s 1.8. FIXME: simplify
# after 1.8 support is removed
feature_gates="{CoreDNS: true}"
elif docker exec "$master_name" kubeadm init --help 2>&1 | grep -q CoreDNS; then
# FIXME: CoreDNS should be the default in 1.11
feature_gates="{CoreDNS: false}"
fi
component_feature_gates=""
if [ "${FEATURE_GATES}" != "none" ]; then
component_feature_gates="feature-gates: \\\"${FEATURE_GATES}\\\""
fi
apiserver_extra_args=""
for e in $(set -o posix ; set | grep -E "^APISERVER_[a-z_]+=" | cut -d'=' -f 1); do
opt_name=$(echo ${e#APISERVER_} | sed 's/_/-/g')
apiserver_extra_args+=" ${opt_name}: \\\"$(eval echo \$$e)\\\"\\n"
done
controller_manager_extra_args=""
for e in $(set -o posix ; set | grep -E "^CONTROLLER_MANAGER_[a-z_]+=" | cut -d'=' -f 1); do
opt_name=$(echo ${e#CONTROLLER_MANAGER_} | sed 's/_/-/g')
controller_manager_extra_args+=" ${opt_name}: \\\"$(eval echo \$$e)\\\"\\n"
done
scheduler_extra_args=""
for e in $(set -o posix ; set | grep -E "^SCHEDULER_[a-z_]+=" | cut -d'=' -f 1); do
opt_name=$(echo ${e#SCHEDULER_} | sed 's/_/-/g')
scheduler_extra_args+=" ${opt_name}: \\\"$(eval echo \$$e)\\\"\\n"
done