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[fix] Add swap

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ljf 2018-09-27 00:31:17 +02:00
parent 8fb92faf8d
commit 1a65e55969
3 changed files with 253 additions and 0 deletions
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1
scripts/_common.sh
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@ -73,6 +73,7 @@ function define_dbpass () {
# Install dependencies # Install dependencies
function install_dependencies() { function install_dependencies() {
ynh_add_swap 1024
if [ ! -f /etc/apt/sources.list.d/odoo.list ]; then if [ ! -f /etc/apt/sources.list.d/odoo.list ]; then
# Install Odoo # Install Odoo
# Prepare installation # Prepare installation

250
scripts/_future.sh
View file

@ -225,4 +225,254 @@ is_jessie () {
return 1 return 1
fi fi
} }
# Internal helper design to allow helpers to use getopts to manage their arguments
#
# example: function my_helper()
# {
# declare -Ar args_array=( [a]=arg1= [b]=arg2= [c]=arg3 )
# local arg1
# local arg2
# local arg3
# ynh_handle_getopts_args "$@"
#
# [...]
# }
# my_helper --arg1 "val1" -b val2 -c
#
# usage: ynh_handle_getopts_args "$@"
# | arg: $@ - Simply "$@" to tranfert all the positionnal arguments to the function
#
# This helper need an array, named "args_array" with all the arguments used by the helper
# that want to use ynh_handle_getopts_args
# Be carreful, this array has to be an associative array, as the following example:
# declare -Ar args_array=( [a]=arg1 [b]=arg2= [c]=arg3 )
# Let's explain this array:
# a, b and c are short options, -a, -b and -c
# arg1, arg2 and arg3 are the long options associated to the previous short ones. --arg1, --arg2 and --arg3
# For each option, a short and long version has to be defined.
# Let's see something more significant
# declare -Ar args_array=( [u]=user [f]=finalpath= [d]=database )
#
# NB: Because we're using 'declare' without -g, the array will be declared as a local variable.
#
# Please keep in mind that the long option will be used as a variable to store the values for this option.
# For the previous example, that means that $finalpath will be fill with the value given as argument for this option.
#
# Also, in the previous example, finalpath has a '=' at the end. That means this option need a value.
# So, the helper has to be call with --finalpath /final/path, --finalpath=/final/path or -f /final/path, the variable $finalpath will get the value /final/path
# If there's many values for an option, -f /final /path, the value will be separated by a ';' $finalpath=/final;/path
# For an option without value, like --user in the example, the helper can be called only with --user or -u. $user will then get the value 1.
#
# To keep a retrocompatibility, a package can still call a helper, using getopts, with positional arguments.
# The "legacy mode" will manage the positional arguments and fill the variable in the same order than they are given in $args_array.
# e.g. for `my_helper "val1" val2`, arg1 will be filled with val1, and arg2 with val2.
ynh_handle_getopts_args () {
# Manage arguments only if there's some provided
set +x
if [ $# -ne 0 ]
then
# Store arguments in an array to keep each argument separated
local arguments=("$@")
# For each option in the array, reduce to short options for getopts (e.g. for [u]=user, --user will be -u)
# And built parameters string for getopts
# ${!args_array[@]} is the list of all keys in the array (A key is 'u' in [u]=user, user is a value)
local getopts_parameters=""
local key=""
for key in "${!args_array[@]}"
do
# Concatenate each keys of the array to build the string of arguments for getopts
# Will looks like 'abcd' for -a -b -c -d
# If the value of a key finish by =, it's an option with additionnal values. (e.g. --user bob or -u bob)
# Check the last character of the value associate to the key
if [ "${args_array[$key]: -1}" = "=" ]
then
# For an option with additionnal values, add a ':' after the letter for getopts.
getopts_parameters="${getopts_parameters}${key}:"
else
getopts_parameters="${getopts_parameters}${key}"
fi
# Check each argument given to the function
local arg=""
# ${#arguments[@]} is the size of the array
for arg in `seq 0 $(( ${#arguments[@]} - 1 ))`
do
# And replace long option (value of the key) by the short option, the key itself
# (e.g. for [u]=user, --user will be -u)
# Replace long option with =
arguments[arg]="${arguments[arg]//--${args_array[$key]}/-${key} }"
# And long option without =
arguments[arg]="${arguments[arg]//--${args_array[$key]%=}/-${key}}"
done
done
# Read and parse all the arguments
# Use a function here, to use standart arguments $@ and be able to use shift.
parse_arg () {
# Read all arguments, until no arguments are left
while [ $# -ne 0 ]
do
# Initialize the index of getopts
OPTIND=1
# Parse with getopts only if the argument begin by -, that means the argument is an option
# getopts will fill $parameter with the letter of the option it has read.
local parameter=""
getopts ":$getopts_parameters" parameter || true
if [ "$parameter" = "?" ]
then
ynh_die "Invalid argument: -${OPTARG:-}"
elif [ "$parameter" = ":" ]
then
ynh_die "-$OPTARG parameter requires an argument."
else
local shift_value=1
# Use the long option, corresponding to the short option read by getopts, as a variable
# (e.g. for [u]=user, 'user' will be used as a variable)
# Also, remove '=' at the end of the long option
# The variable name will be stored in 'option_var'
local option_var="${args_array[$parameter]%=}"
# If this option doesn't take values
# if there's a '=' at the end of the long option name, this option takes values
if [ "${args_array[$parameter]: -1}" != "=" ]
then
# 'eval ${option_var}' will use the content of 'option_var'
eval ${option_var}=1
else
# Read all other arguments to find multiple value for this option.
# Load args in a array
local all_args=("$@")
# If the first argument is longer than 2 characters,
# There's a value attached to the option, in the same array cell
if [ ${#all_args[0]} -gt 2 ]; then
# Remove the option and the space, so keep only the value itself.
all_args[0]="${all_args[0]#-${parameter} }"
# Reduce the value of shift, because the option has been removed manually
shift_value=$(( shift_value - 1 ))
fi
# Then read the array value per value
for i in `seq 0 $(( ${#all_args[@]} - 1 ))`
do
# If this argument is an option, end here.
if [ "${all_args[$i]:0:1}" == "-" ] || [ -z "${all_args[$i]}" ]
then
# Ignore the first value of the array, which is the option itself
if [ "$i" -ne 0 ]; then
break
fi
else
# Declare the content of option_var as a variable.
eval ${option_var}=""
# Else, add this value to this option
# Each value will be separated by ';'
if [ -n "${!option_var}" ]
then
# If there's already another value for this option, add a ; before adding the new value
eval ${option_var}+="\;"
fi
eval ${option_var}+=\"${all_args[$i]}\"
shift_value=$(( shift_value + 1 ))
fi
done
fi
fi
# Shift the parameter and its argument(s)
shift $shift_value
done
}
# LEGACY MODE
# Check if there's getopts arguments
if [ "${arguments[0]:0:1}" != "-" ]
then
# If not, enter in legacy mode and manage the arguments as positionnal ones.
echo "! Helper used in legacy mode !"
for i in `seq 0 $(( ${#arguments[@]} -1 ))`
do
# Use getopts_parameters as a list of key of the array args_array
# Remove all ':' in getopts_parameters
getopts_parameters=${getopts_parameters//:}
# Get the key from getopts_parameters, by using the key according to the position of the argument.
key=${getopts_parameters:$i:1}
# Use the long option, corresponding to the key, as a variable
# (e.g. for [u]=user, 'user' will be used as a variable)
# Also, remove '=' at the end of the long option
# The variable name will be stored in 'option_var'
local option_var="${args_array[$key]%=}"
# Store each value given as argument in the corresponding variable
# The values will be stored in the same order than $args_array
eval ${option_var}+=\"${arguments[$i]}\"
done
else
# END LEGACY MODE
# Call parse_arg and pass the modified list of args as an array of arguments.
parse_arg "${arguments[@]}"
fi
fi
set -x
}
# Argument $1 is the size of the swap in MiB
ynh_add_swap () {
# Declare an array to define the options of this helper.
declare -Ar args_array=( [s]=size= )
local size
# Manage arguments with getopts
ynh_handle_getopts_args "$@"
local swap_max_size=$(( $size * 1024 ))
local free_space=$(df --output=avail / | sed 1d)
# Because we don't want to fill the disk with a swap file, divide by 2 the available space.
local usable_space=$(( $free_space / 2 ))
# Compare the available space with the size of the swap.
# And set a acceptable size from the request
if [ $usable_space -ge $swap_max_size ]
then
local swap_size=$swap_max_size
elif [ $usable_space -ge $(( $swap_max_size / 2 )) ]
then
local swap_size=$(( $swap_max_size / 2 ))
elif [ $usable_space -ge $(( $swap_max_size / 3 )) ]
then
local swap_size=$(( $swap_max_size / 3 ))
elif [ $usable_space -ge $(( $swap_max_size / 4 )) ]
then
local swap_size=$(( $swap_max_size / 4 ))
else
echo "Not enough space left for a swap file" >&2
local swap_size=0
fi
# If there's enough space for a swap, and no existing swap here
if [ $swap_size -ne 0 ] && [ ! -e /swap ]
then
# Preallocate space for the swap file
fallocate -l ${swap_size}K /swap
chmod 0600 /swap
# Create the swap
mkswap /swap
# And activate it
swapon /swap
# Then add an entry in fstab to load this swap at each boot.
echo -e "/swap swap swap defaults 0 0 #Swap added by $app" >> /etc/fstab
fi
}
ynh_del_swap () {
# If there a swap at this place
if [ -e /swap ]
then
# Clean the fstab
sed -i "/#Swap added by $app/d" /etc/fstab
# Desactive the swap file
swapoff /swap
# And remove it
rm /swap
fi
}

2
scripts/remove
View file

@ -52,3 +52,5 @@ fi
# Remove NGINX conf # Remove NGINX conf
ynh_rm_nginx_conf ynh_rm_nginx_conf
ynh_del_swap