mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-22 13:00:19 +00:00
503 lines
16 KiB
Bash
Executable File
503 lines
16 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
|
|
# Copyright 2017 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.
|
|
|
|
# Common utilities for kube-up/kube-down
|
|
|
|
set -o errexit
|
|
set -o nounset
|
|
set -o pipefail
|
|
|
|
KUBE_ROOT=$(cd $(dirname "${BASH_SOURCE}")/.. && pwd)
|
|
|
|
DEFAULT_KUBECONFIG="${HOME:-.}/.kube/config"
|
|
|
|
source "${KUBE_ROOT}/hack/lib/util.sh"
|
|
# KUBE_RELEASE_VERSION_REGEX matches things like "v1.2.3" or "v1.2.3-alpha.4"
|
|
#
|
|
# NOTE This must match the version_regex in build/common.sh
|
|
# kube::release::parse_and_validate_release_version()
|
|
KUBE_RELEASE_VERSION_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)(-([a-zA-Z0-9]+)\\.(0|[1-9][0-9]*))?$"
|
|
KUBE_RELEASE_VERSION_DASHED_REGEX="v(0|[1-9][0-9]*)-(0|[1-9][0-9]*)-(0|[1-9][0-9]*)(-([a-zA-Z0-9]+)-(0|[1-9][0-9]*))?"
|
|
|
|
# KUBE_CI_VERSION_REGEX matches things like "v1.2.3-alpha.4.56+abcdefg" This
|
|
#
|
|
# NOTE This must match the version_regex in build/common.sh
|
|
# kube::release::parse_and_validate_ci_version()
|
|
KUBE_CI_VERSION_REGEX="^v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)-([a-zA-Z0-9]+)\\.(0|[1-9][0-9]*)(\\.(0|[1-9][0-9]*)\\+[-0-9a-z]*)?$"
|
|
KUBE_CI_VERSION_DASHED_REGEX="^v(0|[1-9][0-9]*)-(0|[1-9][0-9]*)-(0|[1-9][0-9]*)-([a-zA-Z0-9]+)-(0|[1-9][0-9]*)(-(0|[1-9][0-9]*)\\+[-0-9a-z]*)?"
|
|
|
|
# Generate kubeconfig data for the created cluster.
|
|
# Assumed vars:
|
|
# KUBE_USER
|
|
# KUBE_PASSWORD
|
|
# KUBE_MASTER_IP
|
|
# KUBECONFIG
|
|
# CONTEXT
|
|
#
|
|
# If the apiserver supports bearer auth, also provide:
|
|
# KUBE_BEARER_TOKEN
|
|
#
|
|
# If the kubeconfig context being created should NOT be set as the current context
|
|
# SECONDARY_KUBECONFIG=true
|
|
#
|
|
# To explicitly name the context being created, use OVERRIDE_CONTEXT
|
|
#
|
|
# The following can be omitted for --insecure-skip-tls-verify
|
|
# KUBE_CERT
|
|
# KUBE_KEY
|
|
# CA_CERT
|
|
function create-kubeconfig() {
|
|
KUBECONFIG=${KUBECONFIG:-$DEFAULT_KUBECONFIG}
|
|
local kubectl="${KUBE_ROOT}/cluster/kubectl.sh"
|
|
SECONDARY_KUBECONFIG=${SECONDARY_KUBECONFIG:-}
|
|
OVERRIDE_CONTEXT=${OVERRIDE_CONTEXT:-}
|
|
|
|
if [[ "$OVERRIDE_CONTEXT" != "" ]];then
|
|
CONTEXT=$OVERRIDE_CONTEXT
|
|
fi
|
|
|
|
# KUBECONFIG determines the file we write to, but it may not exist yet
|
|
OLD_IFS=$IFS
|
|
IFS=':'
|
|
for cfg in ${KUBECONFIG} ; do
|
|
if [[ ! -e "${cfg}" ]]; then
|
|
mkdir -p "$(dirname "${cfg}")"
|
|
touch "${cfg}"
|
|
fi
|
|
done
|
|
IFS=$OLD_IFS
|
|
|
|
local cluster_args=(
|
|
"--server=${KUBE_SERVER:-https://${KUBE_MASTER_IP}}"
|
|
)
|
|
if [[ -z "${CA_CERT:-}" ]]; then
|
|
cluster_args+=("--insecure-skip-tls-verify=true")
|
|
else
|
|
cluster_args+=(
|
|
"--certificate-authority=${CA_CERT}"
|
|
"--embed-certs=true"
|
|
)
|
|
fi
|
|
|
|
local user_args=()
|
|
if [[ ! -z "${KUBE_BEARER_TOKEN:-}" ]]; then
|
|
user_args+=(
|
|
"--token=${KUBE_BEARER_TOKEN}"
|
|
)
|
|
elif [[ ! -z "${KUBE_USER:-}" && ! -z "${KUBE_PASSWORD:-}" ]]; then
|
|
user_args+=(
|
|
"--username=${KUBE_USER}"
|
|
"--password=${KUBE_PASSWORD}"
|
|
)
|
|
fi
|
|
if [[ ! -z "${KUBE_CERT:-}" && ! -z "${KUBE_KEY:-}" ]]; then
|
|
user_args+=(
|
|
"--client-certificate=${KUBE_CERT}"
|
|
"--client-key=${KUBE_KEY}"
|
|
"--embed-certs=true"
|
|
)
|
|
fi
|
|
|
|
KUBECONFIG="${KUBECONFIG}" "${kubectl}" config set-cluster "${CONTEXT}" "${cluster_args[@]}"
|
|
if [[ -n "${user_args[@]:-}" ]]; then
|
|
KUBECONFIG="${KUBECONFIG}" "${kubectl}" config set-credentials "${CONTEXT}" "${user_args[@]}"
|
|
fi
|
|
KUBECONFIG="${KUBECONFIG}" "${kubectl}" config set-context "${CONTEXT}" --cluster="${CONTEXT}" --user="${CONTEXT}"
|
|
|
|
if [[ "${SECONDARY_KUBECONFIG}" != "true" ]];then
|
|
KUBECONFIG="${KUBECONFIG}" "${kubectl}" config use-context "${CONTEXT}" --cluster="${CONTEXT}"
|
|
fi
|
|
|
|
# If we have a bearer token, also create a credential entry with basic auth
|
|
# so that it is easy to discover the basic auth password for your cluster
|
|
# to use in a web browser.
|
|
if [[ ! -z "${KUBE_BEARER_TOKEN:-}" && ! -z "${KUBE_USER:-}" && ! -z "${KUBE_PASSWORD:-}" ]]; then
|
|
KUBECONFIG="${KUBECONFIG}" "${kubectl}" config set-credentials "${CONTEXT}-basic-auth" "--username=${KUBE_USER}" "--password=${KUBE_PASSWORD}"
|
|
fi
|
|
|
|
echo "Wrote config for ${CONTEXT} to ${KUBECONFIG}"
|
|
}
|
|
|
|
# Clear kubeconfig data for a context
|
|
# Assumed vars:
|
|
# KUBECONFIG
|
|
# CONTEXT
|
|
#
|
|
# To explicitly name the context being removed, use OVERRIDE_CONTEXT
|
|
function clear-kubeconfig() {
|
|
export KUBECONFIG=${KUBECONFIG:-$DEFAULT_KUBECONFIG}
|
|
OVERRIDE_CONTEXT=${OVERRIDE_CONTEXT:-}
|
|
|
|
if [[ "$OVERRIDE_CONTEXT" != "" ]];then
|
|
CONTEXT=$OVERRIDE_CONTEXT
|
|
fi
|
|
|
|
local kubectl="${KUBE_ROOT}/cluster/kubectl.sh"
|
|
# Unset the current-context before we delete it, as otherwise kubectl errors.
|
|
local cc=$("${kubectl}" config view -o jsonpath='{.current-context}')
|
|
if [[ "${cc}" == "${CONTEXT}" ]]; then
|
|
"${kubectl}" config unset current-context
|
|
fi
|
|
"${kubectl}" config unset "clusters.${CONTEXT}"
|
|
"${kubectl}" config unset "users.${CONTEXT}"
|
|
"${kubectl}" config unset "users.${CONTEXT}-basic-auth"
|
|
"${kubectl}" config unset "contexts.${CONTEXT}"
|
|
|
|
echo "Cleared config for ${CONTEXT} from ${KUBECONFIG}"
|
|
}
|
|
|
|
# Gets username, password for the current-context in kubeconfig, if they exist.
|
|
# Assumed vars:
|
|
# KUBECONFIG # if unset, defaults to global
|
|
# KUBE_CONTEXT # if unset, defaults to current-context
|
|
#
|
|
# Vars set:
|
|
# KUBE_USER
|
|
# KUBE_PASSWORD
|
|
#
|
|
# KUBE_USER,KUBE_PASSWORD will be empty if no current-context is set, or
|
|
# the current-context user does not exist or contain basicauth entries.
|
|
function get-kubeconfig-basicauth() {
|
|
export KUBECONFIG=${KUBECONFIG:-$DEFAULT_KUBECONFIG}
|
|
|
|
local cc=$("${KUBE_ROOT}/cluster/kubectl.sh" config view -o jsonpath="{.current-context}")
|
|
if [[ ! -z "${KUBE_CONTEXT:-}" ]]; then
|
|
cc="${KUBE_CONTEXT}"
|
|
fi
|
|
local user=$("${KUBE_ROOT}/cluster/kubectl.sh" config view -o jsonpath="{.contexts[?(@.name == \"${cc}\")].context.user}")
|
|
get-kubeconfig-user-basicauth "${user}"
|
|
|
|
if [[ -z "${KUBE_USER:-}" || -z "${KUBE_PASSWORD:-}" ]]; then
|
|
# kube-up stores username/password in a an additional kubeconfig section
|
|
# suffixed with "-basic-auth". Cloudproviders like GKE store in directly
|
|
# in the top level section along with the other credential information.
|
|
# TODO: Handle this uniformly, either get rid of "basic-auth" or
|
|
# consolidate its usage into a function across scripts in cluster/
|
|
get-kubeconfig-user-basicauth "${user}-basic-auth"
|
|
fi
|
|
}
|
|
|
|
# Sets KUBE_USER and KUBE_PASSWORD to the username and password specified in
|
|
# the kubeconfig section corresponding to $1.
|
|
#
|
|
# Args:
|
|
# $1 kubeconfig section to look for basic auth (eg: user or user-basic-auth).
|
|
# Assumed vars:
|
|
# KUBE_ROOT
|
|
# Vars set:
|
|
# KUBE_USER
|
|
# KUBE_PASSWORD
|
|
function get-kubeconfig-user-basicauth() {
|
|
KUBE_USER=$("${KUBE_ROOT}/cluster/kubectl.sh" config view -o jsonpath="{.users[?(@.name == \"$1\")].user.username}")
|
|
KUBE_PASSWORD=$("${KUBE_ROOT}/cluster/kubectl.sh" config view -o jsonpath="{.users[?(@.name == \"$1\")].user.password}")
|
|
}
|
|
|
|
# Generate basic auth user and password.
|
|
|
|
# Vars set:
|
|
# KUBE_USER
|
|
# KUBE_PASSWORD
|
|
function gen-kube-basicauth() {
|
|
KUBE_USER=admin
|
|
KUBE_PASSWORD=$(python -c 'import string,random; print("".join(random.SystemRandom().choice(string.ascii_letters + string.digits) for _ in range(16)))')
|
|
}
|
|
|
|
# Get the bearer token for the current-context in kubeconfig if one exists.
|
|
# Assumed vars:
|
|
# KUBECONFIG # if unset, defaults to global
|
|
# KUBE_CONTEXT # if unset, defaults to current-context
|
|
#
|
|
# Vars set:
|
|
# KUBE_BEARER_TOKEN
|
|
#
|
|
# KUBE_BEARER_TOKEN will be empty if no current-context is set, or the
|
|
# current-context user does not exist or contain a bearer token entry.
|
|
function get-kubeconfig-bearertoken() {
|
|
export KUBECONFIG=${KUBECONFIG:-$DEFAULT_KUBECONFIG}
|
|
|
|
local cc=$("${KUBE_ROOT}/cluster/kubectl.sh" config view -o jsonpath="{.current-context}")
|
|
if [[ ! -z "${KUBE_CONTEXT:-}" ]]; then
|
|
cc="${KUBE_CONTEXT}"
|
|
fi
|
|
local user=$("${KUBE_ROOT}/cluster/kubectl.sh" config view -o jsonpath="{.contexts[?(@.name == \"${cc}\")].context.user}")
|
|
KUBE_BEARER_TOKEN=$("${KUBE_ROOT}/cluster/kubectl.sh" config view -o jsonpath="{.users[?(@.name == \"${user}\")].user.token}")
|
|
}
|
|
|
|
# Generate bearer token.
|
|
#
|
|
# Vars set:
|
|
# KUBE_BEARER_TOKEN
|
|
function gen-kube-bearertoken() {
|
|
KUBE_BEARER_TOKEN=$(dd if=/dev/urandom bs=128 count=1 2>/dev/null | base64 | tr -d "=+/" | dd bs=32 count=1 2>/dev/null)
|
|
}
|
|
|
|
function load-or-gen-kube-basicauth() {
|
|
if [[ ! -z "${KUBE_CONTEXT:-}" ]]; then
|
|
get-kubeconfig-basicauth
|
|
fi
|
|
|
|
if [[ -z "${KUBE_USER:-}" || -z "${KUBE_PASSWORD:-}" ]]; then
|
|
gen-kube-basicauth
|
|
fi
|
|
|
|
# Make sure they don't contain any funny characters.
|
|
if ! [[ "${KUBE_USER}" =~ ^[-._@a-zA-Z0-9]+$ ]]; then
|
|
echo "Bad KUBE_USER string."
|
|
exit 1
|
|
fi
|
|
if ! [[ "${KUBE_PASSWORD}" =~ ^[-._@#%/a-zA-Z0-9]+$ ]]; then
|
|
echo "Bad KUBE_PASSWORD string."
|
|
exit 1
|
|
fi
|
|
}
|
|
|
|
# Sets KUBE_VERSION variable to the proper version number (e.g. "v1.0.6",
|
|
# "v1.2.0-alpha.1.881+376438b69c7612") or a version' publication of the form
|
|
# <path>/<version> (e.g. "release/stable",' "ci/latest-1").
|
|
#
|
|
# See the docs on getting builds for more information about version
|
|
# publication.
|
|
#
|
|
# Args:
|
|
# $1 version string from command line
|
|
# Vars set:
|
|
# KUBE_VERSION
|
|
function set_binary_version() {
|
|
if [[ "${1}" =~ "/" ]]; then
|
|
IFS='/' read -a path <<< "${1}"
|
|
if [[ "${path[0]}" == "release" ]]; then
|
|
KUBE_VERSION=$(gsutil cat "gs://kubernetes-release/${1}.txt")
|
|
else
|
|
KUBE_VERSION=$(gsutil cat "gs://kubernetes-release-dev/${1}.txt")
|
|
fi
|
|
else
|
|
KUBE_VERSION=${1}
|
|
fi
|
|
}
|
|
|
|
# Search for the specified tarball in the various known output locations,
|
|
# echoing the location if found.
|
|
#
|
|
# Assumed vars:
|
|
# KUBE_ROOT
|
|
#
|
|
# Args:
|
|
# $1 name of tarball to search for
|
|
function find-tar() {
|
|
local -r tarball=$1
|
|
locations=(
|
|
"${KUBE_ROOT}/server/${tarball}"
|
|
"${KUBE_ROOT}/_output/release-tars/${tarball}"
|
|
"${KUBE_ROOT}/bazel-bin/build/release-tars/${tarball}"
|
|
)
|
|
location=$( (ls -t "${locations[@]}" 2>/dev/null || true) | head -1 )
|
|
|
|
if [[ ! -f "${location}" ]]; then
|
|
echo "!!! Cannot find ${tarball}" >&2
|
|
exit 1
|
|
fi
|
|
echo "${location}"
|
|
}
|
|
|
|
# Verify and find the various tar files that we are going to use on the server.
|
|
#
|
|
# Assumed vars:
|
|
# KUBE_ROOT
|
|
# Vars set:
|
|
# SERVER_BINARY_TAR
|
|
# KUBE_MANIFESTS_TAR
|
|
function find-release-tars() {
|
|
SERVER_BINARY_TAR=$(find-tar kubernetes-server-linux-amd64.tar.gz)
|
|
|
|
# This tarball is used by GCI, Ubuntu Trusty, and Container Linux.
|
|
KUBE_MANIFESTS_TAR=
|
|
if [[ "${MASTER_OS_DISTRIBUTION:-}" == "trusty" || "${MASTER_OS_DISTRIBUTION:-}" == "gci" || "${MASTER_OS_DISTRIBUTION:-}" == "ubuntu" ]] || \
|
|
[[ "${NODE_OS_DISTRIBUTION:-}" == "trusty" || "${NODE_OS_DISTRIBUTION:-}" == "gci" || "${NODE_OS_DISTRIBUTION:-}" == "ubuntu" || "${NODE_OS_DISTRIBUTION:-}" == "custom" ]] ; then
|
|
KUBE_MANIFESTS_TAR=$(find-tar kubernetes-manifests.tar.gz)
|
|
fi
|
|
}
|
|
|
|
# Run the cfssl command to generates certificate files for etcd service, the
|
|
# certificate files will save in $1 directory.
|
|
#
|
|
# Optional vars:
|
|
# GEN_ETCD_CA_CERT (CA cert encode with base64 and ZIP compression)
|
|
# GEN_ETCD_CA_KEY (CA key encode with base64)
|
|
#
|
|
# If GEN_ETCD_CA_CERT or GEN_ETCD_CA_KEY is not specified, it will generates certs for CA.
|
|
#
|
|
# Args:
|
|
# $1 (the directory that certificate files to save)
|
|
# $2 (the ip of etcd member)
|
|
# $3 (the type of etcd certificates, must be one of client, server, peer)
|
|
# $4 (the prefix of the certificate filename, default is $3)
|
|
function generate-etcd-cert() {
|
|
local cert_dir=${1}
|
|
local member_ip=${2}
|
|
local type_cert=${3}
|
|
local prefix=${4:-"${type_cert}"}
|
|
|
|
local GEN_ETCD_CA_CERT=${GEN_ETCD_CA_CERT:-}
|
|
local GEN_ETCD_CA_KEY=${GEN_ETCD_CA_KEY:-}
|
|
|
|
mkdir -p "${cert_dir}"
|
|
pushd "${cert_dir}"
|
|
|
|
kube::util::ensure-cfssl .
|
|
|
|
if [ ! -r "ca-config.json" ]; then
|
|
cat >ca-config.json <<EOF
|
|
{
|
|
"signing": {
|
|
"default": {
|
|
"expiry": "43800h"
|
|
},
|
|
"profiles": {
|
|
"server": {
|
|
"expiry": "43800h",
|
|
"usages": [
|
|
"signing",
|
|
"key encipherment",
|
|
"server auth"
|
|
]
|
|
},
|
|
"client": {
|
|
"expiry": "43800h",
|
|
"usages": [
|
|
"signing",
|
|
"key encipherment",
|
|
"client auth"
|
|
]
|
|
},
|
|
"peer": {
|
|
"expiry": "43800h",
|
|
"usages": [
|
|
"signing",
|
|
"key encipherment",
|
|
"server auth",
|
|
"client auth"
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
EOF
|
|
fi
|
|
|
|
if [ ! -r "ca-csr.json" ]; then
|
|
cat >ca-csr.json <<EOF
|
|
{
|
|
"CN": "Kubernetes",
|
|
"key": {
|
|
"algo": "ecdsa",
|
|
"size": 256
|
|
},
|
|
"names": [
|
|
{
|
|
"C": "US",
|
|
"L": "CA",
|
|
"O": "kubernetes.io"
|
|
}
|
|
]
|
|
}
|
|
EOF
|
|
fi
|
|
|
|
if [[ -n "${GEN_ETCD_CA_CERT}" && -n "${GEN_ETCD_CA_KEY}" ]]; then
|
|
echo "${ca_cert}" | base64 --decode | gunzip > ca.pem
|
|
echo "${ca_key}" | base64 --decode > ca-key.pem
|
|
fi
|
|
|
|
if [[ ! -r "ca.pem" || ! -r "ca-key.pem" ]]; then
|
|
${CFSSL_BIN} gencert -initca ca-csr.json | ${CFSSLJSON_BIN} -bare ca -
|
|
fi
|
|
|
|
case "${type_cert}" in
|
|
client)
|
|
echo "Generate client certificates..."
|
|
echo '{"CN":"client","hosts":["*"],"key":{"algo":"ecdsa","size":256}}' \
|
|
| ${CFSSL_BIN} gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client - \
|
|
| ${CFSSLJSON_BIN} -bare "${prefix}"
|
|
;;
|
|
server)
|
|
echo "Generate server certificates..."
|
|
echo '{"CN":"'${member_ip}'","hosts":[""],"key":{"algo":"ecdsa","size":256}}' \
|
|
| ${CFSSL_BIN} gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server -hostname="${member_ip},127.0.0.1" - \
|
|
| ${CFSSLJSON_BIN} -bare "${prefix}"
|
|
;;
|
|
peer)
|
|
echo "Generate peer certificates..."
|
|
echo '{"CN":"'${member_ip}'","hosts":[""],"key":{"algo":"ecdsa","size":256}}' \
|
|
| ${CFSSL_BIN} gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=peer -hostname="${member_ip},127.0.0.1" - \
|
|
| ${CFSSLJSON_BIN} -bare "${prefix}"
|
|
;;
|
|
*)
|
|
echo "Unknow, unsupported etcd certs type: ${type_cert}" >&2
|
|
echo "Supported type: client, server, peer" >&2
|
|
exit 2
|
|
esac
|
|
|
|
popd
|
|
}
|
|
|
|
# Check whether required binaries exist, prompting to download
|
|
# if missing.
|
|
# If KUBERNETES_SKIP_CONFIRM is set to y, we'll automatically download binaries
|
|
# without prompting.
|
|
function verify-kube-binaries() {
|
|
if ! "${KUBE_ROOT}/cluster/kubectl.sh" version --client >&/dev/null; then
|
|
echo "!!! kubectl appears to be broken or missing"
|
|
download-release-binaries
|
|
fi
|
|
}
|
|
|
|
# Check whether required release artifacts exist, prompting to download
|
|
# if missing.
|
|
# If KUBERNETES_SKIP_CONFIRM is set to y, we'll automatically download binaries
|
|
# without prompting.
|
|
function verify-release-tars() {
|
|
if ! $(find-release-tars); then
|
|
download-release-binaries
|
|
fi
|
|
}
|
|
|
|
# Download release artifacts.
|
|
function download-release-binaries() {
|
|
get_binaries_script="${KUBE_ROOT}/cluster/get-kube-binaries.sh"
|
|
local resp="y"
|
|
if [[ ! "${KUBERNETES_SKIP_CONFIRM:-n}" =~ ^[yY]$ ]]; then
|
|
echo "Required release artifacts appear to be missing. Do you wish to download them? [Y/n]"
|
|
read resp
|
|
fi
|
|
if [[ "${resp}" =~ ^[nN]$ ]]; then
|
|
echo "You must download release artifacts to continue. You can use "
|
|
echo " ${get_binaries_script}"
|
|
echo "to do this for your automatically."
|
|
exit 1
|
|
fi
|
|
"${get_binaries_script}"
|
|
}
|
|
|
|
# Run pushd without stack output
|
|
function pushd() {
|
|
command pushd $@ > /dev/null
|
|
}
|
|
|
|
# Run popd without stack output
|
|
function popd() {
|
|
command popd $@ > /dev/null
|
|
}
|