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util.sh
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util.sh
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#!/bin/bash
# Copyright 2014 Google Inc. 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 constants for the local config.
# Use the config file specified in $KUBE_CONFIG_FILE, or default to
# config-default.sh.
KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
source "${KUBE_ROOT}/cluster/vsphere/config-common.sh"
source "${KUBE_ROOT}/cluster/vsphere/${KUBE_CONFIG_FILE-"config-default.sh"}"
# Detect the IP for the master
#
# Assumed vars:
# MASTER_NAME
# Vars set:
# KUBE_MASTER
# KUBE_MASTER_IP
function detect-master {
KUBE_MASTER=${MASTER_NAME}
if [[ -z "${KUBE_MASTER_IP-}" ]]; then
KUBE_MASTER_IP=$(govc vm.ip ${MASTER_NAME})
fi
if [[ -z "${KUBE_MASTER_IP-}" ]]; then
echo "Could not detect Kubernetes master node. Make sure you've launched a cluster with 'kube-up.sh'" >&2
exit 1
fi
echo "Using master: $KUBE_MASTER (external IP: $KUBE_MASTER_IP)"
}
# Detect the information about the minions
#
# Assumed vars:
# MINION_NAMES
# Vars set:
# KUBE_MINION_IP_ADDRESS (array)
function detect-minions {
KUBE_MINION_IP_ADDRESSES=()
for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
local minion_ip=$(govc vm.ip ${MINION_NAMES[$i]})
if [[ -z "${minion_ip-}" ]] ; then
echo "Did not find ${MINION_NAMES[$i]}" >&2
else
echo "Found ${MINION_NAMES[$i]} at ${minion_ip}"
KUBE_MINION_IP_ADDRESSES+=("${minion_ip}")
fi
done
if [[ -z "${KUBE_MINION_IP_ADDRESSES-}" ]]; then
echo "Could not detect Kubernetes minion nodes. Make sure you've launched a cluster with 'kube-up.sh'" >&2
exit 1
fi
}
function trap-add {
local handler="$1"
local signal="${2-EXIT}"
local cur
cur="$(eval "sh -c 'echo \$3' -- $(trap -p ${signal})")"
if [[ -n "${cur}" ]]; then
handler="${cur}; ${handler}"
fi
trap "${handler}" ${signal}
}
function verify-prereqs {
which "govc" >/dev/null || {
echo "Can't find govc in PATH, please install and retry."
echo ""
echo " go install github.com/vmware/govmomi/govc"
echo ""
exit 1
}
}
function verify-ssh-prereqs {
local rc
rc=0
ssh-add -L 1> /dev/null 2> /dev/null || rc="$?"
# "Could not open a connection to your authentication agent."
if [[ "${rc}" -eq 2 ]]; then
eval "$(ssh-agent)" > /dev/null
trap-add "kill ${SSH_AGENT_PID}" EXIT
fi
rc=0
ssh-add -L 1> /dev/null 2> /dev/null || rc="$?"
# "The agent has no identities."
if [[ "${rc}" -eq 1 ]]; then
# Try adding one of the default identities, with or without passphrase.
ssh-add || true
fi
# Expect at least one identity to be available.
if ! ssh-add -L 1> /dev/null 2> /dev/null; then
echo "Could not find or add an SSH identity."
echo "Please start ssh-agent, add your identity, and retry."
exit 1
fi
}
# Create a temp dir that'll be deleted at the end of this bash session.
#
# Vars set:
# KUBE_TEMP
function ensure-temp-dir {
if [[ -z ${KUBE_TEMP-} ]]; then
KUBE_TEMP=$(mktemp -d -t kubernetes.XXXXXX)
trap-add 'rm -rf "${KUBE_TEMP}"' EXIT
fi
}
# Verify and find the various tar files that we are going to use on the server.
#
# Vars set:
# SERVER_BINARY_TAR
# SALT_TAR
function find-release-tars {
SERVER_BINARY_TAR="${KUBE_ROOT}/server/kubernetes-server-linux-amd64.tar.gz"
if [[ ! -f "$SERVER_BINARY_TAR" ]]; then
SERVER_BINARY_TAR="${KUBE_ROOT}/_output/release-tars/kubernetes-server-linux-amd64.tar.gz"
fi
if [[ ! -f "$SERVER_BINARY_TAR" ]]; then
echo "!!! Cannot find kubernetes-server-linux-amd64.tar.gz"
exit 1
fi
SALT_TAR="${KUBE_ROOT}/server/kubernetes-salt.tar.gz"
if [[ ! -f "$SALT_TAR" ]]; then
SALT_TAR="${KUBE_ROOT}/_output/release-tars/kubernetes-salt.tar.gz"
fi
if [[ ! -f "$SALT_TAR" ]]; then
echo "!!! Cannot find kubernetes-salt.tar.gz"
exit 1
fi
}
# Take the local tar files and upload them to the master.
#
# Assumed vars:
# MASTER_NAME
# SERVER_BINARY_TAR
# SALT_TAR
function upload-server-tars {
local vm_ip
vm_ip=$(govc vm.ip "${MASTER_NAME}")
kube-ssh ${vm_ip} "mkdir -p /home/kube/cache/kubernetes-install"
local tar
for tar in "${SERVER_BINARY_TAR}" "${SALT_TAR}"; do
kube-scp ${vm_ip} "${tar}" "/home/kube/cache/kubernetes-install/${tar##*/}"
done
}
# Ensure that we have a password created for validating to the master. Will
# read from $HOME/.kubernetes_auth if available.
#
# Vars set:
# KUBE_USER
# KUBE_PASSWORD
function get-password {
local file="$HOME/.kubernetes_auth"
if [[ -r "$file" ]]; then
KUBE_USER=$(cat "$file" | python -c 'import json,sys;print json.load(sys.stdin)["User"]')
KUBE_PASSWORD=$(cat "$file" | python -c 'import json,sys;print json.load(sys.stdin)["Password"]')
return
fi
KUBE_USER=admin
KUBE_PASSWORD=$(python -c 'import string,random; print "".join(random.SystemRandom().choice(string.ascii_letters + string.digits) for _ in range(16))')
# Store password for reuse.
cat << EOF > "$file"
{
"User": "$KUBE_USER",
"Password": "$KUBE_PASSWORD"
}
EOF
chmod 0600 "$file"
}
# Run command over ssh
function kube-ssh {
local host="$1"
shift
ssh ${SSH_OPTS-} "kube@${host}" "$@" 2> /dev/null
}
# Copy file over ssh
function kube-scp {
local host="$1"
local src="$2"
local dst="$3"
scp ${SSH_OPTS-} "${src}" "kube@${host}:${dst}"
}
# Instantiate a generic kubernetes virtual machine (master or minion)
#
# Usage:
# kube-up-vm VM_NAME [options to pass to govc vm.create]
#
# Example:
# kube-up-vm "vm-name" -c 2 -m 4096
#
# Assumed vars:
# DISK
# GUEST_ID
function kube-up-vm {
local vm_name="$1"
shift
govc vm.create \
-debug \
-disk="${DISK}" \
-g="${GUEST_ID}" \
-link=true \
"$@" \
"${vm_name}"
# Retrieve IP first, to confirm the guest operations agent is running.
govc vm.ip "${vm_name}" > /dev/null
govc guest.mkdir \
-vm="${vm_name}" \
-p \
/home/kube/.ssh
ssh-add -L > "${KUBE_TEMP}/${vm_name}-authorized_keys"
govc guest.upload \
-vm="${vm_name}" \
-f \
"${KUBE_TEMP}/${vm_name}-authorized_keys" \
/home/kube/.ssh/authorized_keys
}
# Kick off a local script on a kubernetes virtual machine (master or minion)
#
# Usage:
# kube-run VM_NAME LOCAL_FILE
function kube-run {
local vm_name="$1"
local file="$2"
local dst="/tmp/$(basename "${file}")"
govc guest.upload -vm="${vm_name}" -f -perm=0755 "${file}" "${dst}"
local vm_ip
vm_ip=$(govc vm.ip "${vm_name}")
kube-ssh ${vm_ip} "nohup sudo ${dst} < /dev/null 1> ${dst}.out 2> ${dst}.err &"
}
# Instantiate a kubernetes cluster
#
# Assumed vars:
# KUBE_ROOT
# <Various vars set in config file>
function kube-up {
verify-ssh-prereqs
find-release-tars
ensure-temp-dir
get-password
python "${KUBE_ROOT}/third_party/htpasswd/htpasswd.py" \
-b -c "${KUBE_TEMP}/htpasswd" "$KUBE_USER" "$KUBE_PASSWORD"
local htpasswd
htpasswd=$(cat "${KUBE_TEMP}/htpasswd")
echo "Starting master VM (this can take a minute)..."
(
echo "#! /bin/bash"
echo "readonly MY_NAME=${MASTER_NAME}"
grep -v "^#" "${KUBE_ROOT}/cluster/vsphere/templates/hostname.sh"
echo "cd /home/kube/cache/kubernetes-install"
echo "readonly MASTER_NAME='${MASTER_NAME}'"
echo "readonly NODE_INSTANCE_PREFIX='${INSTANCE_PREFIX}-minion'"
echo "readonly PORTAL_NET='${PORTAL_NET}'"
echo "readonly SERVER_BINARY_TAR='${SERVER_BINARY_TAR##*/}'"
echo "readonly SALT_TAR='${SALT_TAR##*/}'"
echo "readonly MASTER_HTPASSWD='${htpasswd}'"
grep -v "^#" "${KUBE_ROOT}/cluster/vsphere/templates/create-dynamic-salt-files.sh"
grep -v "^#" "${KUBE_ROOT}/cluster/vsphere/templates/install-release.sh"
grep -v "^#" "${KUBE_ROOT}/cluster/vsphere/templates/salt-master.sh"
) > "${KUBE_TEMP}/master-start.sh"
kube-up-vm ${MASTER_NAME} -c ${MASTER_CPU-1} -m ${MASTER_MEMORY_MB-1024}
upload-server-tars
kube-run ${MASTER_NAME} "${KUBE_TEMP}/master-start.sh"
# Print master IP, so user can log in for debugging.
detect-master
echo
echo "Starting minion VMs (this can take a minute)..."
for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
(
echo "#! /bin/bash"
echo "readonly MY_NAME=${MINION_NAMES[$i]}"
grep -v "^#" "${KUBE_ROOT}/cluster/vsphere/templates/hostname.sh"
echo "KUBE_MASTER=${KUBE_MASTER}"
echo "KUBE_MASTER_IP=${KUBE_MASTER_IP}"
echo "MINION_IP_RANGE=${MINION_IP_RANGES[$i]}"
grep -v "^#" "${KUBE_ROOT}/cluster/vsphere/templates/salt-minion.sh"
) > "${KUBE_TEMP}/minion-start-${i}.sh"
(
kube-up-vm "${MINION_NAMES[$i]}" -c ${MINION_CPU-1} -m ${MINION_MEMORY_MB-1024}
kube-run "${MINION_NAMES[$i]}" "${KUBE_TEMP}/minion-start-${i}.sh"
) &
done
local fail=0
local job
for job in $(jobs -p); do
wait "${job}" || fail=$((fail + 1))
done
if (( $fail != 0 )); then
echo "${fail} commands failed. Exiting." >&2
exit 2
fi
# Print minion IPs, so user can log in for debugging.
detect-minions
echo
echo "Waiting for master and minion initialization."
echo
echo " This will continually check to see if the API for kubernetes is reachable."
echo " This might loop forever if there was some uncaught error during start up."
echo
printf "Waiting for ${KUBE_MASTER} to become available..."
until curl --insecure --user "${KUBE_USER}:${KUBE_PASSWORD}" --max-time 5 \
--fail --output /dev/null --silent "https://${KUBE_MASTER_IP}/api/v1beta1/pods"; do
printf "."
sleep 2
done
printf " OK\n"
local i
for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
printf "Waiting for ${MINION_NAMES[$i]} to become available..."
until curl --max-time 5 \
--fail --output /dev/null --silent "http://${KUBE_MINION_IP_ADDRESSES[$i]}:10250/healthz"; do
printf "."
sleep 2
done
printf " OK\n"
done
echo
echo "Sanity checking cluster..."
sleep 5
# Basic sanity checking
local i
for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
# Make sure docker is installed
kube-ssh "${KUBE_MINION_IP_ADDRESSES[$i]}" which docker > /dev/null || {
echo "Docker failed to install on ${MINION_NAMES[$i]}. Your cluster is unlikely" >&2
echo "to work correctly. Please run ./cluster/kube-down.sh and re-create the" >&2
echo "cluster. (sorry!)" >&2
exit 1
}
done
echo
echo "Kubernetes cluster is running. The master is running at:"
echo
echo " https://${KUBE_MASTER_IP}"
echo
echo "The user name and password to use is located in ~/.kubernetes_auth."
echo
local kube_cert=".kubecfg.crt"
local kube_key=".kubecfg.key"
local ca_cert=".kubernetes.ca.crt"
(
umask 077
kube-ssh "${KUBE_MASTER_IP}" sudo cat /srv/kubernetes/kubecfg.crt >"${HOME}/${kube_cert}" 2>/dev/null
kube-ssh "${KUBE_MASTER_IP}" sudo cat /srv/kubernetes/kubecfg.key >"${HOME}/${kube_key}" 2>/dev/null
kube-ssh "${KUBE_MASTER_IP}" sudo cat /srv/kubernetes/ca.crt >"${HOME}/${ca_cert}" 2>/dev/null
cat << EOF > ~/.kubernetes_auth
{
"User": "$KUBE_USER",
"Password": "$KUBE_PASSWORD",
"CAFile": "$HOME/$ca_cert",
"CertFile": "$HOME/$kube_cert",
"KeyFile": "$HOME/$kube_key"
}
EOF
chmod 0600 ~/.kubernetes_auth "${HOME}/${kube_cert}" \
"${HOME}/${kube_key}" "${HOME}/${ca_cert}"
)
}
# Delete a kubernetes cluster
function kube-down {
govc vm.destroy ${MASTER_NAME} &
for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
govc vm.destroy ${MINION_NAMES[i]} &
done
wait
}
# Update a kubernetes cluster with latest source
function kube-push {
verify-ssh-prereqs
find-release-tars
detect-master
upload-server-tars
(
echo "#! /bin/bash"
echo "cd /home/kube/cache/kubernetes-install"
echo "readonly SERVER_BINARY_TAR='${SERVER_BINARY_TAR##*/}'"
echo "readonly SALT_TAR='${SALT_TAR##*/}'"
grep -v "^#" "${KUBE_ROOT}/cluster/vsphere/templates/install-release.sh"
echo "echo Executing configuration"
echo "sudo salt '*' mine.update"
echo "sudo salt --force-color '*' state.highstate"
) | kube-ssh "${KUBE_MASTER_IP}"
get-password
echo
echo "Kubernetes cluster is running. The master is running at:"
echo
echo " https://${KUBE_MASTER_IP}"
echo
echo "The user name and password to use is located in ~/.kubernetes_auth."
echo
}
# Execute prior to running tests to build a release if required for env
function test-build-release {
echo "TODO"
}
# Execute prior to running tests to initialize required structure
function test-setup {
echo "TODO"
}
# Execute after running tests to perform any required clean-up
function test-teardown {
echo "TODO"
}
function setup-monitoring {
echo "TODO"
}
function teardown-monitoring {
echo "TODO"
}