80 lines
2.8 KiB
Bash
Executable File
80 lines
2.8 KiB
Bash
Executable File
#!/bin/sh
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set -e
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. /usr/share/debconf/confmodule
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hasEc2Md() {
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local d=/var/lib/cloud i=/var/lib/cloud/instance/ f=""
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local flist="${i}/datasource ${i}/obj.pkl ${d}/cache/obj.pkl"
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# search current instance data source information
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for f in ${flist}; do
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[ -f "${f}" ] || continue
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grep -q DataSourceEc2 "${f}" 2>/dev/null && return 0
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done
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# there was no data above found that would have been indicated
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# by a upgrade. lets just see if we can't find the metadata
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# service. if wget is not present (it is not 'essential')
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# then we will quietly return 1
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local url="http://169.254.169.254/2009-04-04/meta-data/instance-id"
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i=""
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if command -v wget >/dev/null 2>&1; then
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local tout="--connect-timeout 5 --read-timeout 5 --tries 1"
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i=$(wget "${url}" ${tout} -O - 2>/dev/null) || :
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elif command -v curl >/dev/null 2>&1; then
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i=$(curl "${url}" --max-time 1) || :
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fi
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# if instance-id starts with 'i-' then in all likelyhood its good
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[ "${i#i-}" != "${i}" ] && return 0
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return 1
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}
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get_yaml_list() {
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# get_yaml_list(file, key, def): return a comma delimited list with the value
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# for the yaml array defined in 'key' from 'file'. if not found , return 'def'
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# only really supports 'key: [ en1, en2 ]' or 'key: [en1, en2]' formats.
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local file="$1" key="$2" default="$3"
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[ -f "$file" ] || return 1
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# strip all whitespace, delete lines not matching key:,
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# strip key: and [] and replace ',' with ', '
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RET="$(sed -e "s/\s//g" -e "/^$key:/"'!'d \
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-e "s/$key:\[//" -e "s/]//" -e "s/,/, /g" "$file")"
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[ -n "$RET" ] || RET="$default"
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}
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# old_dpkg_cfg is very old file that is no longer read by cloud-init.
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# it gets re-named to cloud.cfg.d/90_dpkg.cfg in the preinst.
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dpkg_cfg="/etc/cloud/cloud.cfg.d/90_dpkg.cfg"
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old_dpkg_cfg="/etc/cloud/distro.cfg"
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if [ -f "${old_dpkg_cfg}" -a ! -f "$dpkg_cfg" ]; then
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dpkg_cfg="${old_dpkg_cfg}"
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echo "WARN: reading value from ${old_dpkg_cfg}" 1>&2
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fi
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if [ -f "$dpkg_cfg" ]; then
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if get_yaml_list "$dpkg_cfg" datasource_list NOTFOUND &&
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val="$RET" && [ "$val" != "NOTFOUND" ]; then
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db_set cloud-init/datasources $val
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else
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echo "WARN: failed to read datasource_list from $dpkg_cfg" 1>&2
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fi
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elif { db_fget cloud-init/datasources seen || : ; } &&
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[ "${RET}" = "false" ]; then
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# this is the first time this we've run (installation or re-install after
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# purge). try to determine if the Ec2 datasource is there.
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# if it is, and Ec2 was not in the default list, then add it.
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db_get cloud-init/datasources
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def="${RET}"
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case " ${def}," in
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*\ Ec2,*) :;;
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*) hasEc2Md &&
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db_set cloud-init/datasources "${def:+${def}, }Ec2";;
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esac
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fi
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db_input low cloud-init/datasources || true
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db_go
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exit 0
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