Jethro's blog

apt-get install thin-provisioning-tools
apt-get update
aptitude full-upgrade
dd if=/dev/zero bs=1M count=1000 of=/dev/sde
pvcreate /dev/sde
vgextend vg0 /dev/sde
lvcreate -L 480M -n cachemeta vg0 /dev/sde
lvcreate -L 475000M -n cachedata vg0 /dev/sde
lvconvert --type cache-pool --cachepolicy mq --chunksize 8192 --poolmetadata vg0/cachemeta --cachemode writeback vg0/cachedata --yes
lvconvert --type cache --cachepool vg0/cachedata vg0/root

HOOK=$(tempfile)
# Add a hook script to initramfs to add the right tools and modules
cat <<'EOF' > $HOOK
#!/bin/sh
PREREQ="lvm2"
prereqs()
{
  echo "$PREREQ"
}
case $1 in
prereqs)
  prereqs
  exit 0
  ;;
esac
if [ ! -x /usr/sbin/cache_check ]; then
  exit 0
fi
. /usr/share/initramfs-tools/hook-functions
copy_exec /usr/sbin/cache_check
manual_add_modules dm_cache dm_cache_mq dm_cache_smq dm_persistent_data dm_bufio
EOF

cp $HOOK /etc/initramfs-tools/hooks/lvmcache
chmod +x /etc/initramfs-tools/hooks/lvmcache

echo "dm_cache" >> /etc/initramfs-tools/modules
echo "dm_cache_mq" >> /etc/initramfs-tools/modules
echo "dm_cache_smq" >> /etc/initramfs-tools/modules
echo "dm_persistent_data" >> /etc/initramfs-tools/modules
echo "dm_bufio" >> /etc/initramfs-tools/modules

# Update initramfs

update-initramfs -u

sudo -s
add-apt-repository ppa:yannubuntu/boot-repair && apt-get update
apt-get install -y boot-repair mdadm thin-provisioning-tools
boot-repair

ENV DEBIAN_FRONTEND=noninteractive \
        HOME=/root \
        PATH=/usr/local/rvm/bin:$PATH \
        NPS_VERSION=1.10.33.2 \
        NGINX_VERSION=1.9.9

RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections && \
        echo 'APT::Get::Clean=always;' >> /etc/apt/apt.conf.d/99AutomaticClean
RUN apt-get update
RUN apt-get install -y build-essential zlib1g-dev libpcre3 libpcre3-dev unzip wget curl

WORKDIR /root
RUN wget https://github.com/pagespeed/ngx_pagespeed/archive/release-${NPS_VERSION}-beta.zip && \
        unzip release-${NPS_VERSION}-beta.zip && \
        rm release-${NPS_VERSION}-beta.zip && \
        cd ngx_pagespeed-release-${NPS_VERSION}-beta/ && \
        wget https://dl.google.com/dl/page-speed/psol/${NPS_VERSION}.tar.gz && \
        tar -xzf ${NPS_VERSION}.tar.gz && \
        rm ${NPS_VERSION}.tar.gz

RUN wget http://nginx.org/download/nginx-${NGINX_VERSION}.tar.gz && \
        tar -xzf nginx-${NGINX_VERSION}.tar.gz && \
        rm nginx-${NGINX_VERSION}.tar.gz

RUN curl -sSL https://rvm.io/mpapis.asc | gpg --import - && \
        curl -L https://get.rvm.io | /bin/bash -s stable && \
        echo 'source /etc/profile.d/rvm.sh' >> /etc/profile && \
        echo 'source /etc/profile.d/rvm.sh' >> /root/.bashrc && \
        rvm requirements && \
        rvm install 2.0.0 && \
        bash -l -c "rvm use --default 2.0.0 && \
        gem install passenger --no-rdoc --no-ri"

RUN adduser --system --no-create-home --disabled-login --disabled-password --group nginx && \
        usermod -g www-data nginx && \
        mkdir -p /etc/nginx/sites-available /etc/nginx/sites-enabled /var/cache/nginx && \
        bash -l -c "rvmsudo passenger-install-nginx-module --auto \
        --nginx-source-dir=$HOME/nginx-${NGINX_VERSION} \
        --extra-configure-flags=\"\
        --conf-path=/etc/nginx/nginx.conf \
        --error-log-path=/var/log/nginx/error.log --group=nginx \
        --http-client-body-temp-path=/var/cache/nginx/client_temp \
        --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp \
        --http-log-path=/var/log/nginx/access.log \
        --http-proxy-temp-path=/var/cache/nginx/proxy_temp \
        --http-scgi-temp-path=/var/cache/nginx/scgi_temp \
        --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp \
        --lock-path=/var/run/nginx.lock --pid-path=/var/run/nginx.pid \
        --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --user=nginx \
        --with-file-aio --with-http_addition_module \
        --with-http_auth_request_module --with-http_dav_module \
        --with-http_flv_module --with-http_gunzip_module \
        --with-http_gzip_static_module --with-http_mp4_module \
        --with-http_random_index_module --with-http_realip_module \
        --with-http_secure_link_module --with-http_slice_module \
        --with-http_ssl_module --with-http_stub_status_module \
        --with-http_sub_module --with-http_v2_module --with-ipv6 --with-mail \
        --with-mail_ssl_module --with-stream --with-stream_ssl_module \
        --with-threads --with-cc-opt='-g -O2 -fstack-protector \
        --param=ssp-buffer-size=4 -Wformat -Werror=format-security \
        -Wp,-D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-Bsymbolic-functions \
        -Wl,-z,relro -Wl,--as-needed' \
        --add-module=$HOME/ngx_pagespeed-release-${NPS_VERSION}-beta\""

ADD https://raw.github.com/JasonGiedymin/nginx-init-ubuntu/master/nginx /etc/init.d/nginx
ADD nginx.service.patch nginx.conf.patch /
RUN chmod +x /etc/init.d/nginx && \
        patch -p0 /etc/init.d/nginx < /nginx.service.patch && \
        update-rc.d -f nginx defaults && \
        patch -p0 /etc/nginx/nginx.conf < /nginx.conf.patch && \
        openssl req -subj '/CN=domain.com/O=My Company Name LTD./C=US' -new -newkey rsa:2048 -days 365 -nodes -x509 -keyout /etc/nginx/cert.key -out /etc/nginx/cert.pem

RUN cd /var/ && \
     apt-get install nodejs -y && \
     bash -l -c 'gem install bundler rails --no-rdoc --no-ri && \
     rails new www && \
     cd /var/www && \
     sed -i "s/secret_key_base.*/secret_key_base: `RAILS_ENV=production rake secret`/" config/secrets.yml && \
     bundle install && \
     rails generate controller welcome index && \
     sed -i "s/# root/root/" config/routes.rb && \
     chown -R nginx:nginx /var/www'

docker build -t jcppkkk/nginx-pagespeed .

docker run --rm -it jcppkkk/nginx-pagespeed bash -c "service nginx start && openssl s_client -connect 127.0.0.1:443 -nextprotoneg '' 2>/dev/null | grep 'Protocols.*h2' && curl -sLkI 'https://127.0.0.1/' | grep 'X-Page-Speed' && curl -sk https://127.0.0.1/ | grep Welcome"
 * Starting Nginx Server...    [ OK ]
Protocols advertised by server: h2, http/1.1
X-Page-Speed: 1.10.33.2-7600
<h1>Welcome#index</h1>

apt-get install --yes software-properties-common
apt-add-repository --yes ppa:zfs-native/stable
apt-get update
apt-get install ubuntu-zfs

dmesg | grep ZFS

# dmesg | grep ZFS
[ 5.979569] ZFS: Loaded module v0.6.4.1-1~trusty, ZFS pool version 5000, ZFS filesystem version 5

root@nfs1:~$ lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0   2.7T  0 disk
├─sda1   8:1    0     1M  0 part
├─sda2   8:2    0   2.7T  0 part /
└─sda3   8:3    0    32G  0 part [SWAP]
sdb      8:16   0   2.7T  0 disk
sdc      8:32   0   2.7T  0 disk
sdd      8:48   0   2.7T  0 disk
sde      8:64   0   2.7T  0 disk
sdf      8:80   0   2.7T  0 disk
sdg      8:96   0   2.7T  0 disk
sdh      8:112  0   2.7T  0 disk

sudo zpool create -f datastore1 raidz2 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh

sudo zfs create -o compression=off -o dedup=off -o volblocksize=32K -V 13000G datastore1/iscsi
sudo zfs set sync=disabled datastore1/iscsi

root@iscsi-storage-2:~# ll /dev/zvol/datastore1/iscsi
lrwxrwxrwx 1 root root 9 May 26 00:41 /dev/zvol/datastore1/iscsi -> ../../zd0

root@iscsi-storage-2:~# targetcli
/> cd backstores
/backstores> iblock/ create name=block_backend dev=/dev/zvol/datastore1/iscsi

... create iscsi target ...

/> cd /iscsi/iqn.2003-01.org.linux-iscsi.iscsi-storage-2.x8664:sn.f017b570b1d2/tpgt1/
luns/ create /backstores/iblock/block_backend

... Add portls ...
... Add Acls of ESXI hosts' initiator iqn name ...

/iscsi/iqn.20...570b1d2/tpgt1> / saveconfig
/iscsi/iqn.20...570b1d2/tpgt1> exit

$ sudo apt-get install nfs-kernel-server
$ sudo reboot

$ sudo service nfs-kernel-server start
 * Exporting directories for NFS kernel daemon... [ OK ]
 * Starting NFS kernel daemon                     [ OK ]

sudo zfs create -o compression=off -o dedup=off -o mountpoint=/nfs -o sharenfs=on datastore1/nfs
sudo zfs set sync=disabled datastore1/nfs

root@nfs1:~# apt-get install nfs-common
root@nfs1:~# showmount -e
Export list for nfs1:
/nfs *

root@nfs1:~# vim /etc/rc.local
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
zfs unshare datastore1/nfs
zfs share datastore1/nfs
exit 0

Skip zd0 if using NFS

# for i in zd0 sdb sdc sdd sde sdf sdg sdh; \
do echo noop > /sys/block/$i/queue/scheduler; cat /sys/block/$i/queue/scheduler; done
[noop] deadline cfq
[noop] deadline cfq
[noop] deadline cfq
[noop] deadline cfq
[noop] deadline cfq
[noop] deadline cfq
[noop] deadline cfq
[noop] deadline cfq

Skip zd0 if using NFS

# for i in zd0 sdb sdc sdd sde sdf sdg sdh; \
do echo 32 > /sys/block/$i/queue/max_sectors_kb; echo 4 > /sys/block/$i/queue/nr_requests; done

# for i in sdb sdc sdd sde sdf sdg sdh; do hdparm -W1 /dev/$i; done

root@nfs1:~# echo $((50*1024*1024*1024)) >> /sys/module/zfs/parameters/zfs_arc_max
root@nfs1:~# echo options zfs zfs_arc_max=$((50*1024*1024*1024)) > /etc/modprobe.d/zfs.conf
root@nfs1:~# cat /etc/modprobe.d/zfs.conf
options zfs zfs_arc_max=53687091200

root@nfs1:~# git clone --depth 1 https://github.com/frankuit/zfs-arcstats-bash.git
root@nfs1:~# zfs-arcstats-bash/arc2
This will display the cache hit and miss ratio's.
for a time limited run (in seconds) add a number of seconds behind this command
|--------------------------------------------------|
|l1reads    l1miss     l1hits     l1hit%     size  |
|--------------------------------------------------|
|175        10         165        94.285%    50 GB  |
|84         0          84         100.000%   49 GB  |
|110        8          102        92.727%    50 GB  |
|100        14         86         86.000%    50 GB  |
|362        14         348        96.132%    50 GB  |
|75         3          72         96.000%    50 GB  |

sudo mkdir -p /var/lib/cloud/seed/nocloud

sudo tee /var/lib/cloud/seed/nocloud/meta-data <<EOF
instance-id: ubuntu
local-hostname: ubuntu
EOF

sudo tee /var/lib/cloud/seed/nocloud/user-data <<EOF
#cloud-config
apt_update: true
apt_upgrade: true
#apt_proxy: http://10.0.1.5:8000
apt_sources:
 - source: "ppa:git-core/ppa"
packages:
 - unattended-upgrades
 - squid-deb-proxy-client
 - vim
 - ntp
 - git
timezone: Asia/Taipei
password: ubuntu
chpasswd: { expire: False }
ssh_pwauth: True
runcmd:
 - grep $(cat /etc/hostname) /etc/hosts || sudo echo 127.0.0.1 $(cat /etc/hostname) >> /etc/hosts
EOF

( cd /var/lib/cloud/instance && sudo rm -Rf * )
sudo shutdown -P now

cd /d c:\
C:\> @powershell -NoProfile -ExecutionPolicy Bypass -Command "iex ((new-object net.webclient).DownloadString('https://chocolatey.org/install.ps1'))" && SET PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin
C:\> choco install golang
C:\> choco install git
C:\> set GOPATH=C:\go
C:\> go get -d -u github.com/ipfs/go-ipfs/cmd/ipfs
C:\> cd c:\go\src\github.com\ipfs\go-ipfs
c:\go\src\github.com\ipfs\go-ipfs> go build -x -tags nofuse github.com\ipfs\go-ipfs\cmd\ipfs
c:\go\src\github.com\ipfs\go-ipfs> cd c:\
C:\> set PATH=%PATH%;c:\go\src\github.com\ipfs\go-ipfs

url_rewrite_program /etc/squid-deb-proxy/redirect.php

#!/usr/bin/php
#!/usr/bin/php
<?php

$temp = array();

// Extend stream timeout to 24 hours
stream_set_timeout(STDIN, 86400);
$pattern = '/(\w+\.)?archive\.ubuntu\.com/i';
$replacement = 'free.nchc.org.tw';

while ( $input = fgets(STDIN) ) {
        // Split the output (space delimited) from squid into an array.
        $temp = split(' ', $input);

        // Set the URL from squid to a temporary holder.
        $output = $temp[0] . "\n";

        // Check the URL and rewrite it if it matches archive.ubuntu.com
        if ( strpos($temp[0], "archive.ubuntu.com") !== false ) {
                $output = '302:'.preg_replace($pattern, $replacement, $temp[0])."\n";
        }
        echo $output;
}

sudo chmod +x /etc/squid-deb-proxy/redirect.php

sudo tail -F /var/log/squid-deb-proxy/access.log

1429005569.051      1 172.17.0.4 TCP_REDIRECT/302 337 GET http://archive.ubuntu.com/ubuntu/dists/trusty/main/source/Sources.gz - HIER_NONE/- -
1429005569.054      1 172.17.0.4 TCP_REDIRECT/302 343 GET http://archive.ubuntu.com/ubuntu/dists/trusty/restricted/source/Sources.gz - HIER_NONE/- -
1429005569.055      0 172.17.0.4 TCP_REDIRECT/302 341 GET http://archive.ubuntu.com/ubuntu/dists/trusty/universe/source/Sources.gz - HIER_NONE/- -
1429005569.056      0 172.17.0.4 TCP_REDIRECT/302 344 GET http://archive.ubuntu.com/ubuntu/dists/trusty/main/binary-amd64/Packages.gz - HIER_NONE/- -
1429005569.057      0 172.17.0.4 TCP_REDIRECT/302 350 GET http://archive.ubuntu.com/ubuntu/dists/trusty/restricted/binary-amd64/Packages.gz - HIER_NONE/- -
1429005569.058      0 172.17.0.4 TCP_REDIRECT/302 348 GET http://archive.ubuntu.com/ubuntu/dists/trusty/universe/binary-amd64/Packages.gz - HIER_NONE/- -
1429005569.070      0 172.17.0.4 TCP_REDIRECT/302 345 GET http://archive.ubuntu.com/ubuntu/dists/trusty-updates/main/source/Sources.gz - HIER_NONE/- -
1429005569.072      0 172.17.0.4 TCP_REDIRECT/302 351 GET http://archive.ubuntu.com/ubuntu/dists/trusty-updates/restricted/source/Sources.gz - HIER_NONE/- -
1429005569.073      0 172.17.0.4 TCP_REDIRECT/302 349 GET http://archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/source/Sources.gz - HIER_NONE/- -
1429005569.074      0 172.17.0.4 TCP_REDIRECT/302 352 GET http://archive.ubuntu.com/ubuntu/dists/trusty-updates/main/binary-amd64/Packages.gz - HIER_NONE/- -
1429005569.075      0 172.17.0.4 TCP_REDIRECT/302 358 GET http://archive.ubuntu.com/ubuntu/dists/trusty-updates/restricted/binary-amd64/Packages.gz - HIER_NONE/- -
1429005569.076      0 172.17.0.4 TCP_REDIRECT/302 356 GET http://archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/binary-amd64/Packages.gz - HIER_NONE/- -
1429005569.200    147 172.17.0.4 TCP_REFRESH_UNMODIFIED/200 1334987 GET http://free.nchc.org.tw/ubuntu/dists/trusty/main/source/Sources.gz - HIER_DIRECT/211.73.64.9 application/x-gzip
1429005569.609     29 172.17.0.4 TCP_REFRESH_UNMODIFIED/200 5736 GET http://free.nchc.org.tw/ubuntu/dists/trusty/restricted/source/Sources.gz - HIER_DIRECT/211.73.64.9 application/x-gzip
1429005570.053    443 172.17.0.4 TCP_REFRESH_UNMODIFIED/200 7926093 GET http://free.nchc.org.tw/ubuntu/dists/trusty/universe/source/Sources.gz - HIER_DIRECT/211.73.64.9 application/x-gzip
1429005570.237    138 172.17.0.4 TCP_REFRESH_UNMODIFIED/200 1743415 GET http://free.nchc.org.tw/ubuntu/dists/trusty/main/binary-amd64/Packages.gz - HIER_DIRECT/211.73.64.9 application/x-gzip
1429005570.259     20 172.17.0.4 TCP_REFRESH_UNMODIFIED/200 16376 GET http://free.nchc.org.tw/ubuntu/dists/trusty/restricted/binary-amd64/Packages.gz - HIER_DIRECT/211.73.64.9 application/x-gzip
1429005570.565    305 172.17.0.4 TCP_REFRESH_UNMODIFIED/200 7589291 GET http://free.nchc.org.tw/ubuntu/dists/trusty/universe/binary-amd64/Packages.gz - HIER_DIRECT/211.73.64.9 application/x-gzip
1429005570.664     48 172.17.0.4 TCP_REFRESH_UNMODIFIED/200 245205 GET http://free.nchc.org.tw/ubuntu/dists/trusty-updates/main/source/Sources.gz - HIER_DIRECT/211.73.64.9 application/x-gzip
1429005570.692     27 172.17.0.4 TCP_REFRESH_UNMODIFIED/200 2710 GET http://free.nchc.org.tw/ubuntu/dists/trusty-updates/restricted/source/Sources.gz - HIER_DIRECT/211.73.64.9 application/x-gzip
1429005570.716     23 172.17.0.4 TCP_REFRESH_UNMODIFIED/200 135611 GET http://free.nchc.org.tw/ubuntu/dists/trusty-updates/universe/source/Sources.gz - HIER_DIRECT/211.73.64.9 application/x-gzip
1429005570.788     70 172.17.0.4 TCP_REFRESH_UNMODIFIED/200 630238 GET http://free.nchc.org.tw/ubuntu/dists/trusty-updates/main/binary-amd64/Packages.gz - HIER_DIRECT/211.73.64.9 application/x-gzip
1429005570.813     24 172.17.0.4 TCP_REFRESH_UNMODIFIED/200 15486 GET http://free.nchc.org.tw/ubuntu/dists/trusty-updates/restricted/binary-amd64/Packages.gz - HIER_DIRECT/211.73.64.9 application/x-gzip
1429005570.860     46 172.17.0.4 TCP_REFRESH_UNMODIFIED/200 343861 GET http://free.nchc.org.tw/ubuntu/dists/trusty-updates/universe/binary-amd64/Packages.gz - HIER_DIRECT/211.73.64.9 application/x-gzip

@echo off
call :check_Permissions
pushd %temp%
 
@echo.===================================================================
@echo.install python-2.7.6.amd64
call :download "http://www.python.org/ftp/python/2.7.6/python-2.7.6.amd64.msi" "python-2.7.6.amd64.msi"
python-2.7.6.amd64.msi /passive
call :download "http://www.rapidee.com/download/RapidEE_setup.exe" "RapidEE_setup.exe"
RapidEE_setup.exe /SILENT
"%programfiles%\Rapid Environment Editor\RapidEE.exe" -a -c Path "C:\Python27;C:\Python27\scripts"
 
@echo.===================================================================
@echo.install setuptools
call :download "http://python-patch.googlecode.com/svn/trunk/patch.py" "patch.py"
call :create_patch
python patch.py -d C:\Python27 python27_patch.diff
call :download "https://bitbucket.org/pypa/setuptools/raw/bootstrap/ez_setup.py" "ez_setup.py"
python ez_setup.py
 
@echo.===================================================================
@echo.install pip
call :download "https://raw.github.com/pypa/pip/master/contrib/get-pip.py" "get-pip.py"
python get-pip.py
 
@echo.===================================================================
@echo.install wxPython2.8-win64-unicode-2.8.12.1-py27
call :download "http://downloads.sourceforge.net/project/wxpython/wxPython/2.8.12.1/wxPython2.8-win64-unicode-2.8.12.1-py27.exe" "wxPython2.8-win64-unicode-2.8.12.1-py27.exe"
wxPython2.8-win64-unicode-2.8.12.1-py27.exe 
 
@echo.===================================================================
@echo.install robotframework
pip install --upgrade robotframework
 
@echo.===================================================================
@echo.install robotframework-ride
call :download "https://robotframework-ride.googlecode.com/files/robotframework-ride-1.2.3.win-amd64.exe" "robotframework-ride-1.2.3.win-amd64.exe"
robotframework-ride-1.2.3.win-amd64.exe
pip install --upgrade robotframework-ride --allow-external robotframework-ride --allow-unverified robotframework-ride
 
 
pause
@goto :EOF
 
:download 
@"C:\Windows\System32\WindowsPowerShell\v1.0\powershell" "$wc = New-Object System.Net.WebClient;$wc.DownloadFile('%1', '%2')"
@echo %2
@goto :EOF
 
:create_patch
@> python27_patch.diff (
@echo.Index: Lib/mimetypes.py
@echo.===================================================================
@echo.--- Lib/mimetypes.py  (revision 85786^)
@echo.+++ Lib/mimetypes.py  (working copy^)
@echo.@@ -27,6 +27,7 @@
@echo. import sys
@echo. import posixpath
@echo. import urllib
@echo.+from itertools import count
@echo. try:
@echo.     import _winreg
@echo. except ImportError:
@echo.@@ -239,19 +240,11 @@
@echo.             return
@echo. 
@echo.         def enum_types(mimedb^):
@echo.-            i = 0
@echo.-            while True:
@echo.+            for i in count(^):
@echo.                 try:
@echo.-                    ctype = _winreg.EnumKey(mimedb, i^)
@echo.+                    yield _winreg.EnumKey(mimedb, i^)
@echo.                 except EnvironmentError:
@echo.                     break
@echo.-                try:
@echo.-                    ctype = ctype.encode(default_encoding^) # omit in 3.x!
@echo.-                except UnicodeEncodeError:
@echo.-                    pass
@echo.-                else:
@echo.-                    yield ctype
@echo.-                i += 1
@echo. 
@echo.         default_encoding = sys.getdefaultencoding(^)
@echo.         with _winreg.OpenKey(_winreg.HKEY_CLASSES_ROOT, ''^) as hkcr:
)
@goto :EOF
 
 
 
:check_Permissions
    echo Administrative permissions required. Detecting permissions...
 
    net session >nul 2>&1
    if %errorLevel% == 0 (
        echo Success: Administrative permissions confirmed.
        @goto :EOF
    ) else (
        echo Failure: Current permissions inadequate.
        pause >nul
        exit
    )