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dind.sh
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#!/bin/bash
# Copyright 2018 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 "${BASH_SOURCE}")"); pwd)"
docker_info_output="$(docker info)"
RUN_ON_BTRFS_ANYWAY="${RUN_ON_BTRFS_ANYWAY:-}"
if [[ ! ${RUN_ON_BTRFS_ANYWAY} ]] && echo "$docker_info_output"| 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 ! echo "$docker_info_output"|grep -s '^ *Operating System: .*Docker for Windows' > /dev/null 2>&1 ; then
if echo "$docker_info_output"|grep -s '^ *Kernel Version: .*-moby$' >/dev/null 2>&1 ||
echo "$docker_info_output"|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;DOWNLOAD_KUBECTL=y;DIND_K8S_VERSION=v1.15;DIND_IMAGE_DIGEST=sha256:12574f2350c69da756ae10b85af0e1ff689a2b5fd3728a2f3112c68195c08d8c;DIND_COMMIT=62f5a9277678777b63ae55d144bd2f99feb7c824
# dind::localhost provides the local host IP based on the address family used for service subnet.
function dind::localhost() {
if [[ ${SERVICE_NET_MODE} = "ipv6" ]]; then
echo '[::1]'
else
echo '0.0.0.0'
fi
}
# dind::family-for indicates whether the CIDR or IP is for an IPv6 or IPv4 family.
function dind::family-for {
local addr=$1
if [[ "$addr" = *":"* ]]; then
echo "ipv6"
else
echo "ipv4"
fi
}
# dind::cluster-suffix builds a suffix used for resources, based on the DIND_LABEL.
function dind::cluster-suffix {
if [ "$DIND_LABEL" != "$DEFAULT_DIND_LABEL" ]; then
echo "-${DIND_LABEL}"
else
echo ''
fi
}
function dind::net-name {
echo "kubeadm-dind-net$( dind::cluster-suffix )"
}
# dind::add-cluster will inject the cluster ID to the IP address. For IPv4, it is
# assumed that the IP is a /24 with the third part of the address available for cluster ID.
# For IPv6, it is assumed that there is enough space for the cluster to be added, and the
# cluster ID will be added to the 16 bits before the double colon. For example:
#
# 10.192.0.0/24 => 10.192.5.0/24
# fd00:77:20::/64 => fd00:77:20:5::/64
#
# This function is intended to be used for management networks.
#
# TODO: Validate that there is enough space for cluster ID.
# TODO: For IPv6 could get fancy and handle case where cluster ID is placed in upper 8 bits of hextet
# TODO: Consider if want to do /16 for IPv4 management subnet.
#
function dind::add-cluster {
local cidr=$1
local ip_mode=$2
if [[ ${ip_mode} = "ipv4" ]]; then
echo ${cidr} | sed "s/^\([0-9]*\.[0-9]*\.\).*\/24$/\1${CLUSTER_ID}.0\/24/"
else # IPv6
echo ${cidr} | sed "s/^\(.*\)\(\:\:\/[0-9]*\)$/\1:${CLUSTER_ID}\2/"
fi
}
# dind::get-and-validate-cidrs takes a list of CIDRs and validates them based on the ip
# mode, returning them. For IPv4 only and IPv6 only modes, only one CIDR is expected. For
# dual stack, two CIDRS are expected. It verifies that the CIDRs are the right family and
# will use the provided defaults, when CIDRs are missing. For dual-stack, the IPv4 address
# will be first.
#
# For the management network, the cluster ID will be injected into the CIDR. Also, if no
# MGMT_CIDRS value is specified, but the legacy DIND_SUBNET/DIND_SUBNET_SIZE is provided,
# that will be used for the (first) CIDR.
#
# NOTE: It is expected that the CIDR size is /24 for IPv4 management networks.
#
# For pod CIDRs, the size will be increased by 8, to leave room for the node ID to be
# injected into the address.
#
# NOTE: For IPv4, the pod size is expected to be /16 -> /24 in usage.
#
function dind::get-and-validate-cidrs {
IFS=', ' read -r -a cidrs <<< "$1"
IFS=', ' read -r -a defaults <<< "$2"
local is_mgmt=$3
case ${IP_MODE} in
ipv4)
case ${#cidrs[@]} in
0)
cidrs[0]="${defaults[0]}"
;;
1)
;;
*)
echo "ERROR! More than one CIDR provided '$1'"
exit 1
;;
esac
if [[ $( dind::family-for "${cidrs[0]}" ) != "ipv4" ]]; then
echo "ERROR! CIDR must be IPv4 value"
exit 1
fi
if [[ ${is_mgmt} = true ]]; then
cidrs[0]="$( dind::add-cluster "${cidrs[0]}" "${IP_MODE}" )"
fi
;;
ipv6)
case ${#cidrs[@]} in
0)
cidrs[0]="${defaults[0]}"
;;
1)
;;
*)
echo "ERROR! More than one CIDR provided '$1'"
exit 1
;;
esac
if [[ $( dind::family-for "${cidrs[0]}" ) != "ipv6" ]]; then
echo "ERROR! CIDR must be IPv6 value"
exit 1
fi
if [[ ${is_mgmt} = true ]]; then
cidrs[0]="$( dind::add-cluster "${cidrs[0]}" "${IP_MODE}" )"
fi
;;
dual-stack)
case ${#cidrs[@]} in
0)
cidrs[0]="${defaults[0]}"
cidrs[1]="${defaults[1]}"
;;
1)
if [[ $( dind::family-for "${cidrs[0]}" ) = "ipv6" ]]; then
cidrs[1]=${cidrs[0]}
cidrs[0]="${defaults[0]}" # Assuming first default is a V4 address
else
cidrs[1]="${defaults[1]}"
fi
;;
2)
# Force ordering to have V4 address first
if [[ $( dind::family-for "${cidrs[0]}" ) = "ipv6" ]]; then
local temp=${cidrs[0]}
cidrs[0]=${cidrs[1]}
cidrs[1]=${temp}
fi
;;
*)
echo "ERROR! More than two CIDRs provided '$1'"
exit 1
;;
esac
local have_v4=""
local have_v6=""
for cidr in ${cidrs[@]}; do
if [[ $( dind::family-for "${cidr}" ) = "ipv6" ]]; then
have_v6=1
else
have_v4=1
fi
done
if [[ -z ${have_v4} ]]; then
echo "ERROR! Missing IPv4 CIDR in '$1'"
exit 1
fi
if [[ -z ${have_v6} ]]; then
echo "ERROR! Missing IPv6 CIDR in '$1'"
exit 1
fi
if [[ ${is_mgmt} = true ]]; then
cidrs[0]="$( dind::add-cluster "${cidrs[0]}" "${IP_MODE}" )"
cidrs[1]="$( dind::add-cluster "${cidrs[1]}" "${IP_MODE}" )"
fi
;;
esac
echo "${cidrs[@]}"
}
# dind::make-ip-from-cidr strips off the slash and size, and appends the
# interface part to the prefix to form an IP. For IPv4, it strips off the
# fourth part of the prefix, so that it can be replaced. It assumes that the
# resulting prefix will be of sufficient size. It also will use hex for the
# appended part for IPv6, and decimal for IPv4.
#
# fd00:20::/64 -> fd00:20::a
# 10.96.0.0/12 -> 10.96.0.10
#
function dind::make-ip-from-cidr {
prefix="$(echo $1 | sed 's,/.*,,')"
if [[ $( dind::family-for ${prefix} ) == "ipv4" ]]; then
printf "%s%d" $( echo ${prefix} | sed 's/0$//' ) $2
else
printf "%s%x" ${prefix} $2
fi
}
# dind::add-cluster-id-and-validate-nat64-prefix will modify the IPv4 mapping
# subnet prefix, by adding the cluster ID (default 0) to the second octet.
# It will produce an error, if the prefix is not in the 10.0.0.0/8 or
# 172.16.0.0/12 private networks.
function dind::add-cluster-id-and-validate-nat64-prefix {
local parts
IFS="." read -a parts <<<${NAT64_V4_SUBNET_PREFIX}
if [[ ${#parts[@]} -ne 2 ]]; then
echo "ERROR! NAT64_V4_SUBNET_PREFIX must be two octets (have '${NAT64_V4_SUBNET_PREFIX}')"
exit 1
fi
(( parts[1]+=${CLUSTER_ID} ))
NAT64_V4_SUBNET_PREFIX="${parts[0]}.${parts[1]}"
echo "Added cluster ID offset (${CLUSTER_ID}) to NAT64_V4_SUBNET_PREFIX giving prefix '${NAT64_V4_SUBNET_PREFIX}'"
if [[ ${parts[0]} -eq 10 ]]; then
if [[ ${parts[1]} > 253 ]]; then
echo "ERROR! NAT64_V4_SUBNET_PREFIX is too large for 10.0.0.0/8 private net"
exit 1
fi
elif [[ ${parts[0]} -eq 172 ]]; then
if [[ ${parts[1]} -lt 16 || ${parts[1]} -gt 31 ]]; then
echo "ERROR! NAT64_V4_SUBNET_PREFIX is outside of range for 172.16.0.0/12 private net"
exit 1
fi
else
echo "ERROR! NAT64_V4_SUBNET_PREFIX is not in 10.0.0.0/8 or 172.16.0.0/12 private networks"
exit 1
fi
echo "Using NAT64 V4 mapping network prefix: ${NAT64_V4_SUBNET_PREFIX}"
}
# START OF PROCESSING...
IP_MODE="${IP_MODE:-ipv4}" # ipv4, ipv6, dual-stack
# FUTURE: Once dual-stack support is released, check K8s version, and reject for older versions.
if [[ ! ${EMBEDDED_CONFIG:-} ]]; then
source "${DIND_ROOT}/config.sh"
fi
# Multicluster support
# Users can specify a cluster ID number from 1..254, represented as a string.
# This will be used to form resource names "cluster-#", and will be used in the
# management subnet to give unique networks for each cluster. If the cluster ID
# is not specified, or zero, it will be considered a single cluster or the first
# in the multi-cluster. This is the recommended usage.
#
# For legacy support, the user can specify DIND_LABEL, which will be used in the
# resource names. If a cluster ID is specified (a hybrid case, where people are
# using the new method, but want custom names), the resourse name will have the
# suffix "-#" with the cluster ID. If no cluster ID is specified (for backward
# compatibility), then the resource name will be just the DIND_LABEL, and a pseudo-
# random number from 1..13 will be generated for the cluster ID to be used in
# management network. The range is limited, because, in IPv6 mode, the cluster ID
# is used in the NAT64 V4 subnet prefix, which must be in a private network.
# The default is 172.18, so the cluster ID cannot be larger than 13 to guarantee
# a valid value.
#
# To get around that limitation, you can set the cluster ID, in addition to the
# DIND_LABEL, and optionally, change the NAT64_V4_SUBNET_PREFIX value.
#
DEFAULT_DIND_LABEL='mirantis.kubeadm_dind_cluster_runtime'
if [[ -z ${DIND_LABEL+x} ]]; then # No legacy DIND_LABEL set
if [[ -z ${CLUSTER_ID+x} ]]; then # No cluster ID set
DIND_LABEL=${DEFAULT_DIND_LABEL} # Single cluster mode
CLUSTER_ID="0"
else # Have cluster ID
if [[ ${CLUSTER_ID} = "0" ]]; then
DIND_LABEL=${DEFAULT_DIND_LABEL} # Single cluster mode or first cluster of multi-cluster
else
DIND_LABEL="cluster-${CLUSTER_ID}" # Multi-cluster
fi
fi
else # Legacy DIND_LABEL set for multi-cluster
if [[ -z ${CLUSTER_ID+x} ]]; then # No cluster ID set, make one from 1..13, but don't use in resource names
CLUSTER_ID="$(( ($RANDOM % 12) + 1 ))"
else
if [[ ${CLUSTER_ID} = "0" ]]; then
CLUSTER_ID="$(( ($RANDOM % 12) + 1 ))" # Force a pseudo-random cluster for additional legacy cluster
else
DIND_LABEL="${DIND_LABEL}-${CLUSTER_ID}"
fi
fi
fi
CNI_PLUGIN="${CNI_PLUGIN:-bridge}"
GCE_HOSTED="${GCE_HOSTED:-}"
DIND_ALLOW_AAAA_USE="${DIND_ALLOW_AAAA_USE:-}" # Default is to use DNS64 always for IPv6 mode
KUBE_ROUTER_VERSION="${KUBE_ROUTER_VERSION:-v0.2.0}"
# Use legacy DIND_SUBNET/DIND_SUBNET_SIZE, only if MGMT_CIDRS is not set.
legacy_mgmt_cidr=""
if [[ ${DIND_SUBNET:-} && ${DIND_SUBNET_SIZE:-} ]]; then
legacy_mgmt_cidr="${DIND_SUBNET}/${DIND_SUBNET_SIZE}"
fi
if [[ ${IP_MODE} = "dual-stack" ]]; then
mgmt_net_defaults="10.192.0.0/24, fd00:20::/64"
KUBE_RSYNC_ADDR="${KUBE_RSYNC_ADDR:-::1}"
SERVICE_CIDR="${SERVICE_CIDR:-fd00:30::/110}" # Will default to IPv6 service net family
pod_net_defaults="10.244.0.0/16, fd00:40::/72"
USE_HAIRPIN="${USE_HAIRPIN:-true}" # Default is to use hairpin for dual-stack
DIND_ALLOW_AAAA_USE=true # Forced, so can access external hosts via 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
elif [[ ${IP_MODE} = "ipv6" ]]; then
mgmt_net_defaults="fd00:20::/64"
KUBE_RSYNC_ADDR="${KUBE_RSYNC_ADDR:-::1}"
SERVICE_CIDR="${SERVICE_CIDR:-fd00:30::/110}"
pod_net_defaults="fd00:40::/72"
USE_HAIRPIN="${USE_HAIRPIN:-true}" # Default is to use hairpin for IPv6
if [[ ${DIND_ALLOW_AAAA_USE} && ${GCE_HOSTED} ]]; then
echo "ERROR! GCE does not support use of IPv6 for external addresses - aborting."
exit 1
fi
else # IPv4 mode
mgmt_net_defaults="10.192.0.0/24"
KUBE_RSYNC_ADDR="${KUBE_RSYNC_ADDR:-0.0.0.0}"
SERVICE_CIDR="${SERVICE_CIDR:-10.96.0.0/12}"
pod_net_defaults="10.244.0.0/16"
USE_HAIRPIN="${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" || ${CNI_PLUGIN} = "calico-kdd" ]]; then
pod_net_defaults="192.168.0.0/16"
fi
fi
IFS=' ' read -r -a mgmt_net_cidrs <<<$( dind::get-and-validate-cidrs "${MGMT_CIDRS:-${legacy_mgmt_cidr}}" "${mgmt_net_defaults[@]}" true )
REMOTE_DNS64_V4SERVER="${REMOTE_DNS64_V4SERVER:-8.8.8.8}"
if [[ ${IP_MODE} == "ipv6" ]]; then
# Uses local DNS64 container
dns_server="$( dind::make-ip-from-cidr ${mgmt_net_cidrs[0]} 0x100 )"
DNS64_PREFIX="${DNS64_PREFIX:-fd00:10:64:ff9b::}"
DNS64_PREFIX_SIZE="${DNS64_PREFIX_SIZE:-96}"
DNS64_PREFIX_CIDR="${DNS64_PREFIX}/${DNS64_PREFIX_SIZE}"
LOCAL_NAT64_SERVER="$( dind::make-ip-from-cidr ${mgmt_net_cidrs[0]} 0x200 )"
NAT64_V4_SUBNET_PREFIX="${NAT64_V4_SUBNET_PREFIX:-172.18}"
dind::add-cluster-id-and-validate-nat64-prefix
else
dns_server="${REMOTE_DNS64_V4SERVER}"
fi
SERVICE_NET_MODE="$( dind::family-for ${SERVICE_CIDR} )"
DNS_SVC_IP="$( dind::make-ip-from-cidr ${SERVICE_CIDR} 10 )"
ETCD_HOST="${ETCD_HOST:-$( dind::localhost )}"
IFS=' ' read -r -a pod_net_cidrs <<<$( dind::get-and-validate-cidrs "${POD_NETWORK_CIDR:-}" "${pod_net_defaults[@]}" false )
declare -a pod_prefixes
declare -a pod_sizes
# Extract the prefix and size from the provided pod CIDR(s), based on the IP mode of each. The
# size will be increased by 8, to make room for the node ID to be added to the prefix later.
# Bridge and PTP plugins can process IPv4 and IPv6 pod CIDRs, other plugins must be IPv4 only.
for pod_cidr in "${pod_net_cidrs[@]}"; do
if [[ $( dind::family-for "${pod_cidr}" ) = "ipv4" ]]; then
actual_size=$( echo ${pod_cidr} | sed 's,.*/,,' )
if [[ ${actual_size} -ne 16 ]]; then
echo "ERROR! For IPv4 CIDRs, the size must be /16. Have '${pod_cidr}'"
exit 1
fi
pod_sizes+=( 24 )
pod_prefixes+=( "$(echo ${pod_cidr} | sed 's/^\([0-9]*\.[0-9]*\.\).*/\1/')" )
else # IPv6
if [[ ${CNI_PLUGIN} != "bridge" && ${CNI_PLUGIN} != "ptp" ]]; then
echo "ERROR! IPv6 pod networks are only supported by bridge and PTP CNI plugins"
exit 1
fi
# There are several cases to address. First, is normal split of prefix and size:
# fd00:10:20:30::/64 ---> fd00:10:20:30: /72
#
# Second, is when the prefix needs to be padded, so that node ID can be added later:
# fd00:10::/64 ---> fd00:10:0:0: /72
#
# Third, is when the low order part of the address, must be removed for the prefix,
# as the node ID will be placed in the lower byte:
# fd00:10:20:30:4000::/72 ---> fd00:10:20:30:40 /80
#
# We will attempt to check for three error cases. One is when the address part is
# way too big for the size specified:
# fd00:10:20:30:40::/48 ---> fd00:10:20: /56 desired, but conflict with 30:40:
#
# Another is when the address part, once trimmed for the size, would loose info:
# fd00:10:20:1234::/56 ---> fd00:10:20:12 /64, but lost 34:, which conflicts
#
# Lastly, again, trimming would leave high byte in hextet, conflicting with
# the node ID:
# fd00:10:20:30:1200::/64 ---> fd00:10:20:30:12 /72, but 12 conflicts
#
# Note: later, the node ID will be appended to the prefix generated.
#
cluster_size="$(echo ${pod_cidr} | sed 's,.*::/,,')"
pod_sizes+=( $((${cluster_size}+8)) )
pod_prefix="$(echo ${pod_cidr} | sed 's,::/.*,:,')"
num_colons="$(grep -o ":" <<< "${pod_prefix}" | wc -l)"
need_zero_pads=$((${cluster_size}/16))
if [[ ${num_colons} -gt $((need_zero_pads + 1)) ]]; then
echo "ERROR! Address part of CIDR (${pod_prefix}) is too large for /${cluster_size}"
exit 1
fi
if [[ ${num_colons} -gt ${need_zero_pads} ]]; then
# Will be replacing lowest byte with node ID, so pull off lower byte and colon
if [[ ${pod_prefix: -3} != "00:" ]]; then # last byte is not zero
echo "ERROR! Cannot trim address part of CIDR (${pod_prefix}) to fit in /${cluster_size}"
exit 1
fi
pod_prefix=${pod_prefix::-3}
if [[ $(( ${cluster_size} % 16 )) -eq 0 && $( ${pod_prefix: -1} ) != ":" ]]; then # should not be upper byte for this size CIDR
echo "ERROR! Trimmed address part of CIDR (${pod_prefix}) is still too large for /${cluster_size}"
exit 1
fi
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 ${need_zero_pads} ]; do
pod_prefix+="0:"
((num_colons++))
done
pod_prefixes+=( "${pod_prefix}" )
fi
done
DIND_IMAGE_BASE="${DIND_IMAGE_BASE:-mirantis/kubeadm-dind-cluster}"
if [[ ${DIND_COMMIT:-} ]]; then
if [[ ${DIND_COMMIT} = current ]]; then
DIND_COMMIT="$(cd "${DIND_ROOT}"; git rev-parse HEAD)"
fi
DIND_K8S_VERSION="${DIND_K8S_VERSION:-v1.13}"
DIND_IMAGE="${DIND_IMAGE_BASE}:${DIND_COMMIT}-${DIND_K8S_VERSION}"
else
DIND_IMAGE="${DIND_IMAGE:-${DIND_IMAGE_BASE}:local}"
fi
if [[ ${DIND_IMAGE_DIGEST:-} ]]; then
DIND_IMAGE="${DIND_IMAGE}@${DIND_IMAGE_DIGEST}"
fi
BUILD_KUBEADM="${BUILD_KUBEADM:-}"
BUILD_HYPERKUBE="${BUILD_HYPERKUBE:-}"
if [[ ! -z ${DIND_K8S_BIN_DIR:-} ]]; then
BUILD_KUBEADM=""
BUILD_HYPERKUBE=""
fi
KUBEADM_SOURCE="${KUBEADM_SOURCE-}"
HYPERKUBE_SOURCE="${HYPERKUBE_SOURCE-}"
NUM_NODES=${NUM_NODES:-2}
EXTRA_PORTS="${EXTRA_PORTS:-}"
KUBECTL_DIR="${KUBECTL_DIR:-${HOME}/.kubeadm-dind-cluster}"
SKIP_SNAPSHOT="${SKIP_SNAPSHOT:-}"
E2E_REPORT_DIR="${E2E_REPORT_DIR:-}"
DIND_NO_PARALLEL_E2E="${DIND_NO_PARALLEL_E2E:-}"
DNS_SERVICE="${DNS_SERVICE:-coredns}"
DIND_STORAGE_DRIVER="${DIND_STORAGE_DRIVER:-overlay2}"
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
# comma-separated custom network(s) for cluster nodes to join
DIND_CUSTOM_NETWORKS="${DIND_CUSTOM_NETWORKS:-}"
SKIP_DASHBOARD="${SKIP_DASHBOARD:-}"
# you can set special value 'none' not to set any FEATURE_GATES / KUBELET_FEATURE_GATES.
FEATURE_GATES="${FEATURE_GATES:-none}"
KUBELET_FEATURE_GATES="${KUBELET_FEATURE_GATES:-DynamicKubeletConfig=true}"
ENABLE_CEPH="${ENABLE_CEPH:-}"
DIND_CRI="${DIND_CRI:-docker}"
case "${DIND_CRI}" in
docker)
CRI_SOCKET=/var/run/dockershim.sock
;;
containerd)
CRI_SOCKET=/var/run/containerd/containerd.sock
;;
*)
echo >&2 "Bad DIND_CRI. Please specify 'docker' or 'containerd'"
;;
esac
# TODO: Test multi-cluster for IPv6, before enabling
if [[ "${DIND_LABEL}" != "${DEFAULT_DIND_LABEL}" && "${IP_MODE}" == 'dual-stack' ]]; then
echo "Multiple parallel clusters currently not supported for dual-stack 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 [[ ! ${DOWNLOAD_KUBECTL:-} ]] && ! hash kubectl 2>/dev/null; then
echo "You need kubectl binary in your PATH to use prebuilt DIND image" 1>&2
exit 1
fi
kubectl=kubectl
fi
function dind::retry {
# based on retry function in hack/jenkins/ scripts in k8s source
for i in {1..10}; do
"$@" && return 0 || sleep ${i}
done
"$@"
}
busybox_image="busybox:1.30.1"
e2e_base_image="golang:1.12.4"
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::cluster-suffix )"
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
if [[ ! ${DOWNLOAD_KUBECTL:-} ]]; then
return 0
fi
export PATH="${KUBECTL_DIR}:$PATH"
eval "$(docker run --entrypoint /bin/bash --rm "${DIND_IMAGE}" -c "cat /dind-env")"
if [ $(uname) = Darwin ]; then
kubectl_sha1="${KUBECTL_DARWIN_SHA1}"
kubectl_url="${KUBECTL_DARWIN_URL}"
else
kubectl_sha1="${KUBECTL_LINUX_SHA1}"
kubectl_url="${KUBECTL_LINUX_URL}"
fi
local link_target="kubectl-${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}" "${kubectl_url}"
echo "${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 [ $(uname) = Darwin ]; then
dind::step "Building kubectl"
dind::step "+ make WHAT=cmd/kubectl"
make WHAT=cmd/kubectl 2>&1 | dind::filter-make-output
else
dind::make-for-linux y cmd/kubectl
fi
}
function dind::ensure-binaries {
local -a to_build=()
for name in "$@"; 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
}
# dind::ensure-network creates the management network for the cluster. For IPv4
# only it will have the management network CIDR. For IPv6 only, it will have
# the IPv6 management network CIDR and the NAT64 V4 mapping network CIDR. For
# dual stack, it will have the IPv4 and IPv6 management CIDRs. Each of the
# management networks (not the NAT64 network) will have a gateway specified.
#
function dind::ensure-network {
if ! docker network inspect $(dind::net-name) >&/dev/null; then
local -a args
for cidr in "${mgmt_net_cidrs[@]}"; do
if [[ $( dind::family-for ${cidr} ) = "ipv6" ]]; then
args+=(--ipv6)
fi
args+=(--subnet="${cidr}")
local gw=$( dind::make-ip-from-cidr ${cidr} 1 )
args+=(--gateway="${gw}")
done
if [[ ${IP_MODE} = "ipv6" ]]; then
# Need second network for NAT64 V4 mapping network
args+=(--subnet=${NAT64_V4_SUBNET_PREFIX}.0.0/16)
fi
docker network create ${args[@]} $(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
fi
dind::create-volume "${name}"
}
function dind::ensure-dns {
if [[ ${IP_MODE} = "ipv6" ]]; then
local dns64_name="bind9$( dind::cluster-suffix )"
if ! docker inspect ${dns64_name} >&/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 ${dns64_name} --hostname ${dns64_name} --net "$(dind::net-name)" --label "dind-support$( dind::cluster-suffix )" \
--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 ${dns64_name} ip addr list eth0 | grep "inet" | awk '$1 == "inet" {print $2}')"
docker exec ${dns64_name} ip addr del ${ipv4_addr} dev eth0
docker exec ${dns64_name} ip -6 route add ${DNS64_PREFIX_CIDR} via ${LOCAL_NAT64_SERVER}
fi
fi
}
function dind::ensure-nat {
if [[ ${IP_MODE} = "ipv6" ]]; then
local nat64_name="tayga$( dind::cluster-suffix )"
if ! docker ps | grep ${nat64_name} >&/dev/null; then
docker run -d --name ${nat64_name} --hostname ${nat64_name} --net "$(dind::net-name)" --label "dind-support$( dind::cluster-suffix )" \
--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 node_id=${2:-0}
local portforward="${3:-}"
if [[ $# -gt 3 ]]; then
shift 3
else
shift $#
fi
local -a opts=("$@")
local ip_mode="--ip"
for cidr in "${mgmt_net_cidrs[@]}"; do
if [[ $( dind::family-for ${cidr} ) = "ipv6" ]]; then
ip_mode="--ip6"
fi
opts+=("${ip_mode}" "$( dind::make-ip-from-cidr ${cidr} $((${node_id}+1)) )")
done
opts+=("$@")
local -a args=("systemd.setenv=CNI_PLUGIN=${CNI_PLUGIN}")
args+=("systemd.setenv=IP_MODE=${IP_MODE}")
args+=("systemd.setenv=DIND_STORAGE_DRIVER=${DIND_STORAGE_DRIVER}")
args+=("systemd.setenv=DIND_CRI=${DIND_CRI}")
if [[ ${IP_MODE} != "ipv4" ]]; then
opts+=(--sysctl net.ipv6.conf.all.disable_ipv6=0)
opts+=(--sysctl net.ipv6.conf.all.forwarding=1)
fi
if [[ ${IP_MODE} = "ipv6" ]]; then
opts+=(--dns ${dns_server})
args+=("systemd.setenv=DNS64_PREFIX_CIDR=${DNS64_PREFIX_CIDR}")
args+=("systemd.setenv=LOCAL_NAT64_SERVER=${LOCAL_NAT64_SERVER}")
fi
declare -a pod_nets
local i=0
if [[ ${IP_MODE} = "ipv4" || ${IP_MODE} = "dual-stack" ]]; then
pod_nets+=("${pod_prefixes[$i]}${node_id}")
i=$((i+1))
fi
if [[ ${IP_MODE} = "ipv6" || ${IP_MODE} = "dual-stack" ]]; then
# For prefix, if node ID will be in the upper byte, push it over
if [[ $((${pod_sizes[$i]} % 16)) -ne 0 ]]; then
n_id=$(printf "%02x00\n" "${node_id}")
else
if [[ "${pod_prefixes[$i]: -1}" = ":" ]]; then
n_id=$(printf "%x\n" "${node_id}")
else
n_id=$(printf "%02x\n" "${node_id}") # In lower byte, so ensure two chars
fi
fi
pod_nets+=("${pod_prefixes[$i]}${n_id}")
fi
args+=("systemd.setenv=POD_NET_PREFIX=\"${pod_nets[0]}\"")