ceph-csi/vendor/k8s.io/kubernetes/cluster/centos/util.sh

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2018-07-18 14:47:22 +00:00
#!/usr/bin/env bash
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# Copyright 2015 The Kubernetes Authors.
#
# 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 that each provider hosting Kubernetes must implement to use cluster/kube-*.sh scripts.
# exit on any error
set -e
SSH_OPTS="-oStrictHostKeyChecking=no -oUserKnownHostsFile=/dev/null -oLogLevel=ERROR -C"
# Use the config file specified in $KUBE_CONFIG_FILE, or default to
# config-default.sh.
KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
readonly ROOT=$(dirname "${BASH_SOURCE}")
source "${ROOT}/${KUBE_CONFIG_FILE:-"config-default.sh"}"
source "$KUBE_ROOT/cluster/common.sh"
KUBECTL_PATH=${KUBE_ROOT}/cluster/centos/binaries/kubectl
# Directory to be used for master and node provisioning.
KUBE_TEMP="~/kube_temp"
# Get master IP addresses and store in KUBE_MASTER_IP_ADDRESSES[]
# Must ensure that the following ENV vars are set:
# MASTERS
function detect-masters() {
KUBE_MASTER_IP_ADDRESSES=()
for master in ${MASTERS}; do
KUBE_MASTER_IP_ADDRESSES+=("${master#*@}")
done
echo "KUBE_MASTERS: ${MASTERS}" 1>&2
echo "KUBE_MASTER_IP_ADDRESSES: [${KUBE_MASTER_IP_ADDRESSES[*]}]" 1>&2
}
# Get node IP addresses and store in KUBE_NODE_IP_ADDRESSES[]
function detect-nodes() {
KUBE_NODE_IP_ADDRESSES=()
for node in ${NODES}; do
KUBE_NODE_IP_ADDRESSES+=("${node#*@}")
done
echo "KUBE_NODE_IP_ADDRESSES: [${KUBE_NODE_IP_ADDRESSES[*]}]" 1>&2
}
# Verify prereqs on host machine
function verify-prereqs() {
local rc
rc=0
ssh-add -L 1> /dev/null 2> /dev/null || rc="$?"
# "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
rc=0
# 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
}
# Install handler for signal trap
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}" ${signal}
}
# Validate a kubernetes cluster
function validate-cluster() {
# by default call the generic validate-cluster.sh script, customizable by
# any cluster provider if this does not fit.
set +e
"${KUBE_ROOT}/cluster/validate-cluster.sh"
if [[ "$?" -ne "0" ]]; then
for master in ${MASTERS}; do
troubleshoot-master ${master}
done
for node in ${NODES}; do
troubleshoot-node ${node}
done
exit 1
fi
set -e
}
# Instantiate a kubernetes cluster
function kube-up() {
make-ca-cert
local num_infra=0
for master in ${MASTERS}; do
provision-master "${master}" "infra${num_infra}"
let ++num_infra
done
for master in ${MASTERS}; do
post-provision-master "${master}"
done
for node in ${NODES}; do
provision-node "${node}"
done
detect-masters
# set CONTEXT and KUBE_SERVER values for create-kubeconfig() and get-password()
export CONTEXT="centos"
export KUBE_SERVER="http://${MASTER_ADVERTISE_ADDRESS}:8080"
source "${KUBE_ROOT}/cluster/common.sh"
# set kubernetes user and password
get-password
create-kubeconfig
}
# Delete a kubernetes cluster
function kube-down() {
for master in ${MASTERS}; do
tear-down-master ${master}
done
for node in ${NODES}; do
tear-down-node ${node}
done
}
function troubleshoot-master() {
# Troubleshooting on master if all required daemons are active.
echo "[INFO] Troubleshooting on master $1"
local -a required_daemon=("kube-apiserver" "kube-controller-manager" "kube-scheduler")
local daemon
local daemon_status
printf "%-24s %-10s \n" "PROCESS" "STATUS"
for daemon in "${required_daemon[@]}"; do
local rc=0
kube-ssh "${1}" "sudo systemctl is-active ${daemon}" >/dev/null 2>&1 || rc="$?"
if [[ "${rc}" -ne "0" ]]; then
daemon_status="inactive"
else
daemon_status="active"
fi
printf "%-24s %s\n" ${daemon} ${daemon_status}
done
printf "\n"
}
function troubleshoot-node() {
# Troubleshooting on node if all required daemons are active.
echo "[INFO] Troubleshooting on node ${1}"
local -a required_daemon=("kube-proxy" "kubelet" "docker" "flannel")
local daemon
local daemon_status
printf "%-24s %-10s \n" "PROCESS" "STATUS"
for daemon in "${required_daemon[@]}"; do
local rc=0
kube-ssh "${1}" "sudo systemctl is-active ${daemon}" >/dev/null 2>&1 || rc="$?"
if [[ "${rc}" -ne "0" ]]; then
daemon_status="inactive"
else
daemon_status="active"
fi
printf "%-24s %s\n" ${daemon} ${daemon_status}
done
printf "\n"
}
# Clean up on master
function tear-down-master() {
echo "[INFO] tear-down-master on $1"
for service_name in etcd kube-apiserver kube-controller-manager kube-scheduler ; do
service_file="/usr/lib/systemd/system/${service_name}.service"
kube-ssh "$1" " \
if [[ -f $service_file ]]; then \
sudo systemctl stop $service_name; \
sudo systemctl disable $service_name; \
sudo rm -f $service_file; \
fi"
done
kube-ssh "${1}" "sudo rm -rf /opt/kubernetes"
kube-ssh "${1}" "sudo rm -rf /srv/kubernetes"
kube-ssh "${1}" "sudo rm -rf ${KUBE_TEMP}"
kube-ssh "${1}" "sudo rm -rf /var/lib/etcd"
}
# Clean up on node
function tear-down-node() {
echo "[INFO] tear-down-node on $1"
for service_name in kube-proxy kubelet docker flannel ; do
service_file="/usr/lib/systemd/system/${service_name}.service"
kube-ssh "$1" " \
if [[ -f $service_file ]]; then \
sudo systemctl stop $service_name; \
sudo systemctl disable $service_name; \
sudo rm -f $service_file; \
fi"
done
kube-ssh "$1" "sudo rm -rf /run/flannel"
kube-ssh "$1" "sudo rm -rf /opt/kubernetes"
kube-ssh "$1" "sudo rm -rf /srv/kubernetes"
kube-ssh "$1" "sudo rm -rf ${KUBE_TEMP}"
}
# Generate the CA certificates for k8s components
function make-ca-cert() {
echo "[INFO] make-ca-cert"
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bash "${ROOT}/make-ca-cert.sh" "${MASTER_ADVERTISE_IP}" "IP:${MASTER_ADVERTISE_IP},IP:${SERVICE_CLUSTER_IP_RANGE%.*}.1,DNS:kubernetes,DNS:kubernetes.default,DNS:kubernetes.default.svc,DNS:kubernetes.default.svc.cluster.local"
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}
# Provision master
#
# Assumed vars:
# $1 (master)
# $2 (etcd_name)
# KUBE_TEMP
# ETCD_SERVERS
# ETCD_INITIAL_CLUSTER
# SERVICE_CLUSTER_IP_RANGE
# MASTER_ADVERTISE_ADDRESS
function provision-master() {
echo "[INFO] Provision master on $1"
local master="$1"
local master_ip="${master#*@}"
local etcd_name="$2"
ensure-setup-dir "${master}"
ensure-etcd-cert "${etcd_name}" "${master_ip}"
kube-scp "${master}" "${ROOT}/ca-cert ${ROOT}/binaries/master ${ROOT}/master ${ROOT}/config-default.sh ${ROOT}/util.sh" "${KUBE_TEMP}"
kube-scp "${master}" "${ROOT}/etcd-cert/ca.pem \
${ROOT}/etcd-cert/client.pem \
${ROOT}/etcd-cert/client-key.pem \
${ROOT}/etcd-cert/server-${etcd_name}.pem \
${ROOT}/etcd-cert/server-${etcd_name}-key.pem \
${ROOT}/etcd-cert/peer-${etcd_name}.pem \
${ROOT}/etcd-cert/peer-${etcd_name}-key.pem" "${KUBE_TEMP}/etcd-cert"
kube-ssh "${master}" " \
sudo rm -rf /opt/kubernetes/bin; \
sudo cp -r ${KUBE_TEMP}/master/bin /opt/kubernetes; \
sudo mkdir -p /srv/kubernetes/; sudo cp -f ${KUBE_TEMP}/ca-cert/* /srv/kubernetes/; \
sudo mkdir -p /srv/kubernetes/etcd; sudo cp -f ${KUBE_TEMP}/etcd-cert/* /srv/kubernetes/etcd/; \
sudo chmod -R +x /opt/kubernetes/bin; \
sudo ln -sf /opt/kubernetes/bin/* /usr/local/bin/; \
sudo bash ${KUBE_TEMP}/master/scripts/etcd.sh ${etcd_name} ${master_ip} ${ETCD_INITIAL_CLUSTER}; \
sudo bash ${KUBE_TEMP}/master/scripts/apiserver.sh ${master_ip} ${ETCD_SERVERS} ${SERVICE_CLUSTER_IP_RANGE} ${ADMISSION_CONTROL}; \
sudo bash ${KUBE_TEMP}/master/scripts/controller-manager.sh ${MASTER_ADVERTISE_ADDRESS}; \
sudo bash ${KUBE_TEMP}/master/scripts/scheduler.sh ${MASTER_ADVERTISE_ADDRESS}"
}
# Post-provision master, run after all masters were provisioned
#
# Assumed vars:
# $1 (master)
# KUBE_TEMP
# ETCD_SERVERS
# FLANNEL_NET
function post-provision-master() {
echo "[INFO] Post provision master on $1"
local master=$1
kube-ssh "${master}" " \
sudo bash ${KUBE_TEMP}/master/scripts/flannel.sh ${ETCD_SERVERS} ${FLANNEL_NET}; \
sudo bash ${KUBE_TEMP}/master/scripts/post-etcd.sh"
}
# Provision node
#
# Assumed vars:
# $1 (node)
# KUBE_TEMP
# ETCD_SERVERS
# FLANNEL_NET
# MASTER_ADVERTISE_ADDRESS
# DOCKER_OPTS
# DNS_SERVER_IP
# DNS_DOMAIN
function provision-node() {
echo "[INFO] Provision node on $1"
local node=$1
local node_ip=${node#*@}
local dns_ip=${DNS_SERVER_IP#*@}
local dns_domain=${DNS_DOMAIN#*@}
ensure-setup-dir ${node}
kube-scp "${node}" "${ROOT}/binaries/node ${ROOT}/node ${ROOT}/config-default.sh ${ROOT}/util.sh" "${KUBE_TEMP}"
kube-scp "${node}" "${ROOT}/etcd-cert/ca.pem \
${ROOT}/etcd-cert/client.pem \
${ROOT}/etcd-cert/client-key.pem" "${KUBE_TEMP}/etcd-cert"
kube-ssh "${node}" " \
rm -rf /opt/kubernetes/bin; \
sudo cp -r ${KUBE_TEMP}/node/bin /opt/kubernetes; \
sudo chmod -R +x /opt/kubernetes/bin; \
sudo mkdir -p /srv/kubernetes/etcd; sudo cp -f ${KUBE_TEMP}/etcd-cert/* /srv/kubernetes/etcd/; \
sudo ln -s /opt/kubernetes/bin/* /usr/local/bin/; \
sudo mkdir -p /srv/kubernetes/etcd; sudo cp -f ${KUBE_TEMP}/etcd-cert/* /srv/kubernetes/etcd/; \
sudo bash ${KUBE_TEMP}/node/scripts/flannel.sh ${ETCD_SERVERS} ${FLANNEL_NET}; \
sudo bash ${KUBE_TEMP}/node/scripts/docker.sh \"${DOCKER_OPTS}\"; \
sudo bash ${KUBE_TEMP}/node/scripts/kubelet.sh ${MASTER_ADVERTISE_ADDRESS} ${node_ip} ${dns_ip} ${dns_domain}; \
sudo bash ${KUBE_TEMP}/node/scripts/proxy.sh ${MASTER_ADVERTISE_ADDRESS}"
}
# Create dirs that'll be used during setup on target machine.
#
# Assumed vars:
# KUBE_TEMP
function ensure-setup-dir() {
kube-ssh "${1}" "mkdir -p ${KUBE_TEMP}; \
mkdir -p ${KUBE_TEMP}/etcd-cert; \
sudo mkdir -p /opt/kubernetes/bin; \
sudo mkdir -p /opt/kubernetes/cfg"
}
# Generate certificates for etcd cluster
#
# Assumed vars:
# $1 (etcd member name)
# $2 (master ip)
function ensure-etcd-cert() {
local etcd_name="$1"
local master_ip="$2"
local cert_dir="${ROOT}/etcd-cert"
if [[ ! -r "${cert_dir}/client.pem" || ! -r "${cert_dir}/client-key.pem" ]]; then
generate-etcd-cert "${cert_dir}" "${master_ip}" "client" "client"
fi
generate-etcd-cert "${cert_dir}" "${master_ip}" "server" "server-${etcd_name}"
generate-etcd-cert "${cert_dir}" "${master_ip}" "peer" "peer-${etcd_name}"
}
# Run command over ssh
function kube-ssh() {
local host="$1"
shift
ssh ${SSH_OPTS} -t "${host}" "$@" >/dev/null 2>&1
}
# Copy file recursively over ssh
function kube-scp() {
local host="$1"
local src=($2)
local dst="$3"
scp -r ${SSH_OPTS} ${src[*]} "${host}:${dst}"
}
# Ensure that we have a password created for validating to the master. Will
# read from kubeconfig if available.
#
# Vars set:
# KUBE_USER
# KUBE_PASSWORD
function get-password {
load-or-gen-kube-basicauth
if [[ -z "${KUBE_USER}" || -z "${KUBE_PASSWORD}" ]]; then
KUBE_USER=admin
KUBE_PASSWORD=$(python -c 'import string,random; \
print("".join(random.SystemRandom().choice(string.ascii_letters + string.digits) for _ in range(16)))')
fi
}