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* imds is now an executable script

Browse Source 
* numerous imds script enhancements, including -h/--help
* check imds for secondary ipv4 & ipvs via ifupdown-ng executor
* simplify shell source to things /etc/conf.d/ and /lib/tiny-cloud/
* move log function to /lib/tiny-cloud/common
This commit is contained in:
Jake Buchholz Göktürk 2022-01-24 19:07:35 -08:00
parent 3eb1358940
commit 1d2618dfd0
25 changed files with 510 additions and 259 deletions
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3
Makefile
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@ -2,5 +2,4 @@ PREFIX?=/
.PHONY: install .PHONY: install
install: install:
cp -r etc $(PREFIX) cp -r bin etc lib sbin usr $(PREFIX)
cp -r lib $(PREFIX)

147
bin/imds Executable file
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@ -0,0 +1,147 @@
#!/bin/sh
# vim:set ts=4 et ft=sh:
# Tiny Cloud - Instance MetaData Service client
### configuration
source /etc/conf.d/tiny-cloud
### cloud-specific variables/functions
unset \
IMDS_HEADER \
IMDS_URI \
IMDS_QUERY \
IMDS_HOSTNAME \
IMDS_SSH_KEYS \
IMDS_USERDATA \
IMDS_NICS \
IMDS_MAC \
IMDS_IPV4 \
IMDS_IPV6 \
IMDS_IPV4_NET \
IMDS_IPV6_NET \
IMDS_IPV4_PREFIX \
IMDS_IPV6_PREFIX
unset -f \
_imds_token \
_imds_header \
_imds_nic_index \
2>/dev/null || true
### default variables/functions
CLOUD="${CLOUD:-unknown}"
IMDS_ENDPOINT="169.254.169.254"
_imds_ssh_keys() { _imds "$IMDS_SSH_KEYS"; }
_imds_userdata() { _imds "$IMDS_USERDATA"; }
### load cloud-specific variables and functions
if [ ! -d /lib/tiny-cloud/"$CLOUD" ]; then
echo "ERROR: Unknown Cloud '$CLOUD'" >&2
exit 1
fi
source /lib/tiny-cloud/"$CLOUD"/imds
### non-overrideable functions
_imds() {
wget --quiet --timeout 1 --output-document - \
--header "$(_imds_header)" \
"http://$IMDS_ENDPOINT/$IMDS_URI/$1$IMDS_QUERY"
}
imds() {
local cmd args key rv err=1
if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
_imds_help
return
fi
while [ -n "$1" ]; do
cmd=_imds
args=
key="$1"; shift
case $key in
# error handling
-e) err=0; continue ;; # ignore
+e) err=1; continue ;; # return
# TODO: retry/deadline
# output control
+n) echo; continue ;; # insert newline
+s) echo -n " "; continue ;; # insert space
+t) echo -en "\t"; continue ;; # insert tab
# key aliasing
@hostname) args="$IMDS_HOSTNAME" ;;
@ssh-keys) cmd=_imds_ssh_keys ;;
@userdata) cmd=_imds_userdata ;;
@nics) args="$IMDS_NICS" ;;
@nic:*)
cmd=imds
args=$(_imds_nic_args $(echo "${key#@nic:}" | tr , ' '))
;;
# use key verbatim
*) args="$key" ;;
esac
# TODO: retry/deadline
"$cmd" $args 2>/dev/null
rv=$?
[ $err -eq 0 ] && continue
[ $rv = "0" ] || return $rv
done
}
_imds_nic_args() {
local key nic
nic=$(_imds_nic_index "$1") || return 1
if [ -z "$2" ]; then
echo "$IMDS_NICS/$nic"
return
fi
while [ -n "$2" ]; do
key="$2"
shift
case "$key" in
@mac) key="$IMDS_MAC" ;;
@ipv4) key="$IMDS_IPV4" ;;
@ipv6) key="$IMDS_IPV6" ;;
@ipv4-net) key="$IMDS_IPV4_NET" ;;
@ipv6-net) key="$IMDS_IPV6_NET" ;;
@ipv4-prefix) key="$IMDS_IPV4_PREFIX" ;;
@ipv6-prefix) key="$IMDS_IPV6_PREFIX" ;;
# error/output control passthrough
-e|+[enst]) printf "$key\n"; continue ;;
esac
printf "$IMDS_NICS/$nic/$key\n"
done
}
_imds_help() {
cat <<EOT
Usage: imds [-h] { -e | +e | +n | +s | +t | @<alias> | <imds-path> } ...
-h : help
-e / +e : ignore / catch errors
+n / +s / +t : insert newline / space / tab
<alias> :-
hostname : instance hostname
ssh-keys : instance SSH keys
userdata : instance user data
nics : instance NICs
nic:<iface>[,<nic-key> ...] : specific NIC interface
<iface> : network interface (i.e. eth1)
<nic-key> :- { -e | +e | +n | +s | +t | @<nic-alias> | <nic-path> }
<nic-alias> :-
mac : mac address
ipv4 : ipv4 address(es)
ipv6 : ipv6 address(es)
ipv4-net : subnet ipv4 network(s)
ipv6-net : subnet ipv6 network(s)
ipv4-prefix : delegated ipv4 CIDR(s)
ipv6-prefix : delegated ipv6 CIDR(s)
EOT
}
imds "$@"

3
etc/conf.d/tiny-cloud
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@ -13,9 +13,6 @@
# IMDS token validity, in seconds (AWS only) # IMDS token validity, in seconds (AWS only)
#IMDS_TOKEN_TTL=5 #IMDS_TOKEN_TTL=5
# Location of libraries
#TINY_CLOUD_LIBS=/lib/tiny-cloud
# Location of var directory # Location of var directory
#TINY_CLOUD_VAR=/var/lib/cloud #TINY_CLOUD_VAR=/var/lib/cloud

2
etc/init.d/tiny-cloud
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@ -1,5 +1,5 @@
#!/sbin/openrc-run #!/sbin/openrc-run
# vim:set ft=sh noet ts=4: # vim:set ts=8 noet ft=sh:
description="Tiny Cloud Bootstrap - main phase" description="Tiny Cloud Bootstrap - main phase"

2
etc/init.d/tiny-cloud-early
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@ -1,5 +1,5 @@
#!/sbin/openrc-run #!/sbin/openrc-run
# vim:set ft=sh noet ts=4: # vim:set ts=8 noet ft=sh:
description="Tiny Cloud Bootstrap - early phase" description="Tiny Cloud Bootstrap - early phase"

2
etc/init.d/tiny-cloud-final
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@ -1,5 +1,5 @@
#!/sbin/openrc-run #!/sbin/openrc-run
# vim:set ft=sh noet ts=4: # vim:set ts=8 noet ft=sh:
description="Tiny Cloud Bootstrap - final phase" description="Tiny Cloud Bootstrap - final phase"

5
etc/network/interfaces.d/DEFAULT
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@ -1,2 +1,5 @@
auto %% auto %%
iface %% inet dhcp iface %%
use dhcp
use imds
imds-resync 300

4
etc/network/interfaces.d/lo
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@ -1,2 +1,4 @@
auto lo auto lo
iface lo inet loopback iface lo
use link
use loopback

19
lib/mdev/nvme-ebs-links
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@ -1,25 +1,21 @@
#!/bin/sh #!/bin/sh
# vim:set ts=2 et: # vim:set ts=2 et:
source /lib/tiny-cloud/common
# nvme tool not installed? # nvme tool not installed?
[ -x /usr/sbin/nvme ] || exit [ -x /usr/sbin/nvme ] || log crit "nvme cli not installed"
PROC="$(basename "$0")[$$]"
log() {
FACILITY="kern.$1"
shift
logger -p "$FACILITY" -t "$PROC" "$@"
}
raw_ebs_alias() { raw_ebs_alias() {
/usr/sbin/nvme id-ctrl "/dev/$BASE" -b 2>/dev/null | dd bs=32 skip=96 count=1 2>/dev/null /usr/sbin/nvme id-ctrl /dev/"$BASE" -b 2>/dev/null |
dd bs=32 skip=96 count=1 2>/dev/null
} }
case $ACTION in case $ACTION in
add|"") add|"")
BASE=$(echo "$MDEV" | sed -re 's/^(nvme[0-9]+n[0-9]+).*/\1/') BASE=$(echo "$MDEV" | sed -re 's/^(nvme[0-9]+n[0-9]+).*/\1/')
PART=$(echo "$MDEV" | sed -re 's/nvme[0-9]+n[0-9]+p?//g') PART=$(echo "$MDEV" | sed -re 's/nvme[0-9]+n[0-9]+p?//g')
# TODO: deadline instead of max tries
MAXTRY=30 MAXTRY=30
TRY=0 TRY=0
until [ -n "$EBS" ]; do until [ -n "$EBS" ]; do
@ -42,7 +38,8 @@ case $ACTION in
remove) remove)
for TARGET in sd* xvd* for TARGET in sd* xvd*
do do
[ "$(readlink "$TARGET" 2>/dev/null)" = "$MDEV" ] && rm -f "$TARGET" && log notice "Removed $TARGET symlink for $MDEV" [ $(readlink "$TARGET" 2>/dev/null) = "$MDEV" ] && rm -f "$TARGET" && \
log notice "Removed $TARGET symlink for $MDEV"
done done
;; ;;
esac esac

38
lib/mdev/vnic-eth-hotplug
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@ -1,29 +1,12 @@
#!/bin/sh #!/bin/sh
# vim: set ts=4 et: # vim:set ts=4 et:
set -e set -e
PROC="$(basename "$0")[$$]" source /lib/tiny-cloud/common
DEBUG= if [ -z "$MDEV" ] || [ -z "$ACTION" ]; then
log crit "MDEV or ACTION undefined, aborting"
log() {
[ -z "$DEBUG" ] && [ "$1" = "debug" ] && return
local facility="kern.$1"
shift
logger -p "$facility" -t "$PROC" "$@"
}
if [ -z "$MDEV" ]; then
log err "MDEV env not defined"
exit 1
fi
# where's the tiny-cloud lib directory?
if [ -z "$TINY_CLOUD_LIBS" ]; then
TINY_CLOUD_CONF=${TINY_CLOUD_CONF:-/etc/conf.d/tiny-cloud}
[ -f "$TINY_CLOUD_CONF" ] && source "$TINY_CLOUD_CONF"
TINY_CLOUD_LIBS=${TINY_CLOUD_LIBS:-/lib/tiny-cloud}
fi fi
IFACE_CFG=/etc/network/interfaces IFACE_CFG=/etc/network/interfaces
@ -46,19 +29,18 @@ ip() {
assemble_interfaces() { assemble_interfaces() {
log info "Rebuilding $IFACE_CFG" log info "Rebuilding $IFACE_CFG"
# TODO: might be elsewhere, source /etc/conf.d/tiny-cloud /lib/tiny-cloud/network-interfaces
"$TINY_CLOUD_LIBS"/network-interfaces
} }
interface_up() { interface_up() {
log info "Bringing up $MDEV" log info "Bringing up $MDEV"
# so /run/udhcpcd.$MDEV.pid isn't non-owner writeable # umask so udhcpc PID file isn't non-owner writeable
(umask 0022 && ifup "$MDEV") (umask 0022 && ifup "$MDEV")
} }
cleanup_interface() { cleanup_interface() {
local v p rtable="${MDEV#eth}" local v pref rtable="${MDEV#eth}"
let rtable+=1000 let rtable+=10000
log info "Cleaning up $MDEV" log info "Cleaning up $MDEV"
@ -71,8 +53,8 @@ cleanup_interface() {
# remove related rules # remove related rules
for v in 4 6; do for v in 4 6; do
for p in $(ip -"$v" rule show table "$rtable" | cut -d: -f1); do for pref in $(ip -"$v" rule show table "$rtable" | cut -d: -f1); do
ip -"$v" rule del pref "$p" ip -"$v" rule del pref "$pref"
done done
done done
} }

37
lib/tiny-cloud/aws/imds
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@ -1,35 +1,40 @@
# AWS Instance MetaData Service variables and functions # AWS Instance MetaData Service variables and functions
# vim:set ft=sh noet ts=4: # vim:set ts=4 et ft=sh:
IMDS_HEADER="X-aws-ec2-metadata-token" IMDS_HEADER="X-aws-ec2-metadata-token"
IMDS_TOKEN_TTL_HEADER="X-aws-ec2-metadata-token-ttl-seconds" IMDS_TOKEN_TTL_HEADER="X-aws-ec2-metadata-token-ttl-seconds"
IMDS_TOKEN_TTL=${IMDS_TOKEN_TTL:-5} IMDS_TOKEN_TTL=${IMDS_TOKEN_TTL:-5}
IMDS_URL="http://169.254.169.254/latest" IMDS_URI="latest"
IMDS_HOSTNAME="meta-data/hostname" IMDS_HOSTNAME="meta-data/hostname"
IMDS_SSH_KEYS="meta-data/public-keys" IMDS_SSH_KEYS="meta-data/public-keys"
IMDS_USERDATA="user-data" IMDS_USERDATA="user-data"
IMDS_NICS="meta-data/network/interfaces/macs"
IMDS_MAC="mac"
IMDS_IPV4="local-ipv4s"
IMDS_IPV6="ipv6s"
IMDS_IPV4_NET="subnet-ipv4-cidr-block"
IMDS_IPV6_NET="subnet-ipv6-cidr-blocks"
IMDS_IPV4_PREFIX="ipv4-prefix"
IMDS_IPV6_PREFIX="ipv6-prefix"
_imds_token() { _imds_token() {
echo -ne "PUT /latest/api/token" \ echo -ne "PUT /latest/api/token" \
"HTTP/1.0\r\n$IMDS_TOKEN_TTL_HEADER: $IMDS_TOKEN_TTL\r\n\r\n" | "HTTP/1.0\r\n$IMDS_TOKEN_TTL_HEADER: $IMDS_TOKEN_TTL\r\n\r\n" |
nc 169.254.169.254 80 | tail -n 1 nc -w 1 "$IMDS_ENDPOINT" 80 | tail -n 1
} }
_imds_header() { _imds_header() {
echo "$IMDS_HEADER: $(_imds_token)" echo "$IMDS_HEADER: $(_imds_token)"
} }
# digs deeper than the default # digs deeper than the default
imds_ssh_keys() { _imds_ssh_keys() {
local key local key
for key in $(imds "$IMDS_SSH_KEYS"); do
for key in $(imds "$IMDS_SSH_KEYS"); do imds "$IMDS_SSH_KEYS/${key%=*}/openssh-key"
imds "$IMDS_SSH_KEYS/${key%=*}/openssh-key" done | sort -u
done | sort -u
} }
# ignore 404s from IMDS, if no user-data is set _imds_nic_index() { cat "/sys/class/net/$1/address"; }
imds_userdata() {
_imds "$IMDS_USERDATA" || true
}

10
lib/tiny-cloud/aws/mdev
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@ -1,11 +1,11 @@
# AWS mdev Hotplug Modules # AWS mdev Hotplug Modules
# vim:set ft=sh ts=4 noet: # vim:set ts=4 et ft=sh:
# makes symlinks for NVMe devices that correlate to AWS EBS sd/xvd devices # makes symlinks for NVMe devices that correlate to AWS EBS sd/xvd devices
mod__nvme_ebs_links() { mod__nvme_ebs_links() {
# nvme-cli not installed? # nvme-cli not installed?
[ -x /usr/sbin/nvme ] || return 1 [ -x /usr/sbin/nvme ] || return 1
install_before '^nvme\.\*' \ install_before '^nvme\.\*' \
'nvme[0-9]+n.* root:disk 0660 */lib/mdev/nvme-ebs-links' 'nvme[0-9]+n.* root:disk 0660 */lib/mdev/nvme-ebs-links'
} }

22
lib/tiny-cloud/azure/imds
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@ -1,28 +1,30 @@
# Azure Instance MetaData Service variables and functions # Azure Instance MetaData Service variables and functions
# vim:set ft=sh noet ts=4: # vim:set ts=4 et ft=sh:
IMDS_HEADER="Metadata" IMDS_HEADER="Metadata"
IMDS_QUERY="?format=text&api-version=2021-05-01" IMDS_QUERY="?format=text&api-version=2021-05-01"
IMDS_URL="http://169.254.169.254/metadata/instance" IMDS_URI="metadata/instance"
IMDS_HOSTNAME="compute/name" IMDS_HOSTNAME="compute/name"
IMDS_SSH_KEYS="compute/publicKeys" IMDS_SSH_KEYS="compute/publicKeys"
IMDS_USERDATA="compute/userData" IMDS_USERDATA="compute/userData"
IMDS_NICS=""
_imds_header() { _imds_header() {
echo "$IMDS_HEADER: true" echo "$IMDS_HEADER: true"
} }
# dig deeper than default # dig deeper than default
imds_ssh_keys() { _imds_ssh_keys() {
local key local key
for key in $(imds "$IMDS_SSH_KEYS"); do for key in $(imds "$IMDS_SSH_KEYS"); do
imds "$IMDS_SSH_KEYS/${key}/keyData" imds "$IMDS_SSH_KEYS/${key}/keyData"
done | sort -u done | sort -u
} }
# decode userdata value # decode userdata value
imds_userdata() { _imds_userdata() {
imds "$IMDS_USERDATA" | base64 -d imds "$IMDS_USERDATA" | base64 -d
} }

24
lib/tiny-cloud/common Normal file
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@ -0,0 +1,24 @@
# Tiny Cloud - common script functions
# vim: ts=4 et ft=sh:
log() {
local facility=kern
local stderr
local tag=$(basename "$0")
while [ "${1:0:1}" = '-' ]; do
case "$1" in
-f) facility="$2"; shift ;;
-s) stderr=-s ;;
-t) tag="$tag/$2"; shift ;;
esac
shift
done
local level="$1"
[ -z "$DEBUG" ] && [ "$level" = debug ] && return
shift
logger $stderr -p "$facility.$level" -t "$tag" "$@"
case "$level" in
crit|alert|emerg) exit 1 ;;
esac
}

22
lib/tiny-cloud/gcp/imds
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@ -1,26 +1,26 @@
# Google Cloud Instance MetaData Service variables and functions # Google Cloud Instance MetaData Service variables and functions
# vim:set ft=sh noet ts=4: # vim:set ts=4 et ft=sh:
IMDS_HEADER="Metadata-Flavor" IMDS_HEADER="Metadata-Flavor"
IMDS_URL="http://169.254.169.254/computeMetadata/v1" IMDS_URI="computeMetadata/v1"
IMDS_HOSTNAME="instance/hostname" IMDS_HOSTNAME="instance/hostname"
IMDS_SSH_KEYS=" IMDS_SSH_KEYS="
project/attributes/ssh-keys project/attributes/ssh-keys
instance/attributes/ssh-keys instance/attributes/ssh-keys
" "
IMDS_USERDATA="instance/attributes/user-data" IMDS_USERDATA="instance/attributes/user-data"
_imds_header() { _imds_header() {
echo "$IMDS_HEADER: Google" echo "$IMDS_HEADER: Google"
} }
# merge project and instance keys # merge project and instance keys
imds_ssh_keys() { _imds_ssh_keys() {
local ssh_keys local ssh_keys
for ssh_keys in $IMDS_SSH_KEYS; do for ssh_keys in $IMDS_SSH_KEYS; do
# ignore errors and strip leading '<login>:' # ignore errors and strip leading '<login>:'
_imds "$ssh_keys" | cut -d: -f2- imds -e "$ssh_keys" | cut -d: -f2-
done | sort -u done | sort -u
} }

62
lib/tiny-cloud/imds
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@ -1,62 +0,0 @@
# Tiny Cloud - Instance MetaData Service functions and variables
# vim:set ft=sh ts=4 noet:
### configuration
if [ -z "$TINY_CLOUD_LIBS" ]; then
TINY_CLOUD_CONF=${TINY_CLOUD_CONF:-/etc/conf.d/tiny-cloud}
[ -f "$TINY_CLOUD_CONF" ] && source "$TINY_CLOUD_CONF"
TINY_CLOUD_LIBS=${TINY_CLOUD_LIBS:-/lib/tiny-cloud}
fi
# defaults
CLOUD="${CLOUD:-unknown}"
# these are always cloud-specific
unset \
IMDS_HEADER \
IMDS_QUERY \
IMDS_URL \
IMDS_HOSTNAME \
IMDS_SSH_KEYS \
IMDS_USERDATA
unset -f \
_imds_token \
_imds_header \
2>/dev/null || true
# without error reporting
_imds() {
wget --quiet --header "$(_imds_header)" --output-document - \
"$IMDS_URL/$1$IMDS_QUERY"
}
imds() {
_imds "$1"
RV=$?
[ $RV != 0 ] && echo "ERROR: $RV" >&2
return $RV
}
imds_hostname() {
imds "$IMDS_HOSTNAME"
}
imds_ssh_keys() {
imds "$IMDS_SSH_KEYS"
}
imds_userdata() {
imds "$IMDS_USERDATA"
}
### load cloud-specific things
if [ ! -d "$TINY_CLOUD_LIBS/$CLOUD" ]; then
echo "ERROR: Unknown Cloud '$CLOUD'" >&2
exit 1
fi
source "$TINY_CLOUD_LIBS/$CLOUD/imds"

2
lib/tiny-cloud/init-common
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@ -1,5 +1,5 @@
# Tiny Cloud - Common Initialization # Tiny Cloud - Common Initialization
# vim:set ft=sh ts=4 noet: # vim:set ts=4 et ft=sh:
# set defaults # set defaults
CLOUD_USER=${CLOUD_USER:-alpine} CLOUD_USER=${CLOUD_USER:-alpine}

63
lib/tiny-cloud/init-early
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@ -1,49 +1,44 @@
# Tiny Cloud - Early Phase Functions # Tiny Cloud - Early Phase Functions
# vim:set ft=sh ts=4 noet: # vim:set ts=4 et ft=sh:
if [ -z "$TINY_CLOUD_LIBS" ]; then source /etc/conf.d/tiny-cloud
TINY_CLOUD_CONF=${TINY_CLOUD_CONF:-/etc/conf.d/tiny-cloud} source /lib/tiny-cloud/init-common
[ -f "$TINY_CLOUD_CONF" ] && source "$TINY_CLOUD_CONF"
TINY_CLOUD_LIBS=${TINY_CLOUD_LIBS:-/lib/tiny-cloud}
fi
source "$TINY_CLOUD_LIBS"/init-common
expand_root() { expand_root() {
# explicitly use busybox, in case util-linux is also installed # explicitly use busybox, in case util-linux is also installed
local mountpoint=$(busybox mountpoint -n / | cut -d' ' -f1) local mountpoint=$(busybox mountpoint -n / | cut -d' ' -f1)
local volume=$(echo "$mountpoint" | local volume=$(echo "$mountpoint" |
sed -Ee "s/(nvme\d+n\d|(xv|s)d[a-z])p?\d?$/\1/" sed -Ee "s/(nvme\d+n\d|(xv|s)d[a-z])p?\d?$/\1/"
) )
local partition local partition
if [ "$mountpoint" != "$volume" ]; then if [ "$mountpoint" != "$volume" ]; then
# it's a partition, resize it # it's a partition, resize it
partition=$(echo "$mountpoint" | sed -Ee "s/.*(\d+)$/\1/") partition=$(echo "$mountpoint" | sed -Ee "s/.*(\d+)$/\1/")
echo ", +" | sfdisk -q --no-reread -N "$partition" "$volume" echo ", +" | sfdisk -q --no-reread -N "$partition" "$volume"
partx -u "$volume" partx -u "$volume"
fi fi
# resize filesystem # resize filesystem
mount -orw,remount / mount -orw,remount /
resize2fs "$mountpoint" resize2fs "$mountpoint"
} }
assemble_interfaces() { "$TINY_CLOUD_LIBS"/network-interfaces; } assemble_interfaces() { /lib/tiny-cloud/network-interfaces; }
has_cloud_hotplugs() { [ -n "$HOTPLUG_MODULES" ]; } has_cloud_hotplugs() { [ -n "$HOTPLUG_MODULES" ]; }
install_hotplugs() { install_hotplugs() {
local result local result
for module in $HOTPLUG_MODULES; do for module in $HOTPLUG_MODULES; do
result='-' result='-'
echo -n " $module" echo -n " $module"
if type "mod__$module" | grep -q "is a function"; then if type "mod__$module" | grep -q "is a function"; then
"mod__$module" && result='+' || result='!' "mod__$module" && result='+' || result='!'
fi fi
echo -n "($result)" echo -n "($result)"
done done
} }
HOTPLUG_TYPE=${HOTPLUG_TYPE:-mdev} HOTPLUG_TYPE=${HOTPLUG_TYPE:-mdev}
source "$TINY_CLOUD_LIBS/$HOTPLUG_TYPE" source /lib/tiny-cloud/"$HOTPLUG_TYPE"

28
lib/tiny-cloud/init-final
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@ -1,30 +1,24 @@
# Tiny Cloud - Final Phase Functions # Tiny Cloud - Final Phase Functions
# vim:set ft=sh ts=4 noet: # vim:set ts=4 et ft=sh:
if [ -z "$TINY_CLOUD_LIBS" ]; then source /etc/conf.d/tiny-cloud
TINY_CLOUD_CONF=${TINY_CLOUD_CONF:-/etc/conf.d/tiny-cloud} source /lib/tiny-cloud/init-common
[ -f "$TINY_CLOUD_CONF" ] && source "$TINY_CLOUD_CONF"
TINY_CLOUD_LIBS=${TINY_CLOUD_LIBS:-/lib/tiny-cloud}
fi
source "$TINY_CLOUD_LIBS"/init-common
source "$TINY_CLOUD_LIBS"/imds
save_userdata() { save_userdata() {
imds_userdata > "$TINY_CLOUD_VAR/$CLOUD_USERDATA" imds -e @userdata > "$TINY_CLOUD_VAR/$CLOUD_USERDATA"
} }
is_userdata_script() { is_userdata_script() {
head -n1 "$TINY_CLOUD_VAR/$CLOUD_USERDATA" | grep -q '#!/' head -n1 "$TINY_CLOUD_VAR/$CLOUD_USERDATA" | grep -q '#!/'
} }
run_userdata() { run_userdata() {
local log="$TINY_CLOUD_LOGS/$CLOUD_USERDATA.log" local log="$TINY_CLOUD_LOGS/$CLOUD_USERDATA.log"
local exit="$TINY_CLOUD_LOGS/$CLOUD_USERDATA.exit" local exit="$TINY_CLOUD_LOGS/$CLOUD_USERDATA.exit"
local userdata="$TINY_CLOUD_VAR/$CLOUD_USERDATA" local userdata="$TINY_CLOUD_VAR/$CLOUD_USERDATA"
chmod +x "$userdata" chmod +x "$userdata"
{ "$userdata" 2>& 1; echo $? > "$exit"; } | tee "$log" { "$userdata" 2>& 1; echo $? > "$exit"; } | tee "$log"
return $(cat "$exit") return $(cat "$exit")
} }

48
lib/tiny-cloud/init-main
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@ -1,41 +1,35 @@
# Tiny Cloud - Main Phase Functions # Tiny Cloud - Main Phase Functions
# vim:set ft=sh ts=4 noet: # vim:set ts=4 et ft=sh:
if [ -z "$TINY_CLOUD_LIBS" ]; then source /etc/conf.d/tiny-cloud
TINY_CLOUD_CONF=${TINY_CLOUD_CONF:-/etc/conf.d/tiny-cloud} source /lib/tiny-cloud/init-common
[ -f "$TINY_CLOUD_CONF" ] && source "$TINY_CLOUD_CONF"
TINY_CLOUD_LIBS=${TINY_CLOUD_LIBS:-/lib/tiny-cloud}
fi
source "$TINY_CLOUD_LIBS"/init-common
source "$TINY_CLOUD_LIBS"/imds
# ensure existence of output directories # ensure existence of output directories
[ ! -d "$TINY_CLOUD_LOGS" ] && mkdir -p "$TINY_CLOUD_LOGS" [ ! -d "$TINY_CLOUD_LOGS" ] && mkdir -p "$TINY_CLOUD_LOGS"
[ ! -d "$TINY_CLOUD_VAR" ] && mkdir -p "$TINY_CLOUD_VAR" [ ! -d "$TINY_CLOUD_VAR" ] && mkdir -p "$TINY_CLOUD_VAR"
set_hostname() { set_hostname() {
local fqdn=$(imds_hostname) local fqdn=$(imds @hostname)
local host="${fqdn%%\.*}" local host="${fqdn%%\.*}"
echo "$host" > /etc/hostname echo "$host" > /etc/hostname
hostname -F /etc/hostname hostname -F /etc/hostname
echo -e "127.0.1.1\t$fqdn $host" >> /etc/hosts echo -e "127.0.1.1\t$fqdn $host" >> /etc/hosts
} }
set_ssh_keys() { set_ssh_keys() {
local user="$CLOUD_USER" local user="$CLOUD_USER"
local pwent=$(getent passwd "$user") local pwent=$(getent passwd "$user")
local group=$(echo "$pwent" | cut -d: -f4) local group=$(echo "$pwent" | cut -d: -f4)
local ssh_dir="$(echo "$pwent" | cut -d: -f6)/.ssh" local ssh_dir="$(echo "$pwent" | cut -d: -f6)/.ssh"
local keys_file="$ssh_dir/authorized_keys" local keys_file="$ssh_dir/authorized_keys"
if [ ! -d "$ssh_dir" ]; then if [ ! -d "$ssh_dir" ]; then
mkdir -p "$ssh_dir" mkdir -p "$ssh_dir"
chmod 700 "$ssh_dir" chmod 700 "$ssh_dir"
fi fi
touch "$keys_file" touch "$keys_file"
chmod 600 "$keys_file" chmod 600 "$keys_file"
chown -R "$user:$group" "$ssh_dir" chown -R "$user:$group" "$ssh_dir"
imds_ssh_keys > "$keys_file" imds @ssh-keys > "$keys_file"
} }

40
lib/tiny-cloud/mdev
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@ -1,35 +1,35 @@
# Tiny Cloud - mdev hotplug functions # Tiny Cloud - mdev hotplug functions
# vim:set ft=sh ts=4 noet: # vim:set ts=4 et ft=sh:
# generic helper function to install mdev rules # generic helper function to install mdev rules
install_before() { install_before() {
local before="$1" local before="$1"
shift shift
local line="$*" local line="$*"
# already installed # already installed
fgrep -q "$line" /etc/mdev.conf && return 0 fgrep -q "$line" /etc/mdev.conf && return 0
if grep -q "$before" /etc/mdev.conf; then if grep -q "$before" /etc/mdev.conf; then
# install before existing rule # install before existing rule
line="-$line" line="-$line"
else else
# no rule exists, put it before the catch-all fallback # no rule exists, put it before the catch-all fallback
before='^# fallback' before='^# fallback'
line="$line\n" line="$line\n"
fi fi
sed -i -Ee "s|($before.*)|$line\n\1|" /etc/mdev.conf sed -i -Ee "s|($before.*)|$line\n\1|" /etc/mdev.conf
} }
# hotpluggable VNICs (multi-cloud) # hotpluggable VNICs (multi-cloud)
mod__vnic_eth_hotplug() { mod__vnic_eth_hotplug() {
install_before '^eth' \ install_before '^eth' \
'eth[0-9] root:root 0644 */lib/mdev/vnic-eth-hotplug' 'eth[0-9] root:root 0644 */lib/mdev/vnic-eth-hotplug'
# NICs attached at launch don't get added with mdev -s # NICs attached at launch don't get added with mdev -s
assemble_interfaces assemble_interfaces
} }
# load cloud-specific functions # load cloud-specific functions
[ -f "$TINY_CLOUD_LIBS/$CLOUD/mdev" ] && source "$TINY_CLOUD_LIBS/$CLOUD/mdev" [ -f /lib/tiny-cloud/"$CLOUD"/mdev ] && source /lib/tiny-cloud/"$CLOUD"/mdev

13
lib/tiny-cloud/network-interfaces
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@ -1,5 +1,5 @@
#!/bin/sh #!/bin/sh
# vim: set ts=4 et: # vim:set ts=4 et:
set -e set -e
@ -15,10 +15,15 @@ cat > "$IFACE_CFG.new" <<EOT
EOT EOT
# existing loopback and eths # existing loopback and eths
for i in /sys/class/net/{lo,eth*}; do for i in /sys/class/net/*; do
IFACE="$(basename "$i")" IFACE="$(basename "$i")"
[ ! -f "$IFACE" ] && sed -e "s/%%/$IFACE/g" DEFAULT > "$IFACE" case $IFACE in
printf "%s\n\n" "$(cat "$IFACE")" >> "$IFACE_CFG.new" lo|eth*)
[ ! -f "$IFACE" ] && sed -e "s/%%/$IFACE/g" DEFAULT > "$IFACE"
printf "%s\n\n" "$(cat "$IFACE")" >> "$IFACE_CFG.new"
;;
*) continue ;;
esac
done done
# all the rest # all the rest

15
lib/tiny-cloud/oci/imds
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@ -1,13 +1,22 @@
# OCI Instance MetaData Service variables and functions # OCI Instance MetaData Service variables and functions
# vim:set ft=sh noet ts=4: # vim:set ts=4 et ft=sh:
IMDS_HEADER="Authorization" IMDS_HEADER="Authorization"
IMDS_URL="http://169.254.169.254/opc/v2" IMDS_URI="opc/v2"
IMDS_HOSTNAME="instance/hostname" IMDS_HOSTNAME="instance/hostname"
IMDS_SSH_KEYS="instance/metadata/ssh_authorized_keys" IMDS_SSH_KEYS="instance/metadata/ssh_authorized_keys"
IMDS_USERDATA="instance/metadata/userdata" IMDS_USERDATA="instance/metadata/userdata"
_imds_header() { _imds_header() {
echo "$IMDS_HEADER: Bearer Oracle" echo "$IMDS_HEADER: Bearer Oracle"
}
_imds_nic_index() {
local m n=0
local mac=$(cat /sys/class/net/$1/mac)
while m=$(imds $IMDS_NICS/$n/mac | tr A-F a-f); do
[ "$m" = "$mac" ] && echo $n; return 0
done
return 1
} }

144
sbin/imds-net-sync Executable file
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@ -0,0 +1,144 @@
#!/bin/sh
# vim: ts=4 et ft=sh:
# Sync interface's network configuration with IMDS
[ -z "$VERBOSE" ] || set -x
source /lib/tiny-cloud/common
IFACE=${IFACE:-unknown}
[ "$IFACE" = unknown ] && log -s crit "IFACE not set, aborting"
# kill interface's imds-net-sync daemon
[ "$1" = '-k' ] && PHASE=pre=down && shift
PHASE=${PHASE:-post-up}
# route table number
RTABLE=${IFACE#eth}
let RTABLE+=10000
# ip [+F] [-4|-6] <object> <command> [<parameters>]
ip() {
local fail_ok v=-4 cmd level
[ "$1" = '+F' ] && fail_ok=1 && shift
if [ "$1" = '-4' ] || [ "$1" = '-6' ]; then
v="$1"
shift
fi
cmd="$2"
[ "$cmd" = show ] && level=debug || level=info
if /sbin/ip "$v" "$@" || [ -n "$fail_ok" ]; then
log -s "$level" "OK: ip $v $*"
else
log -s err "FAIL: ip $v $*"
fi
}
# get secondary IPv4s currently on the interface
iface_ip4s() {
ip -4 addr show "$IFACE" secondary |
sed -E -e '/inet /!d' -e 's/.*inet ([0-9.]+).*/\1/'
}
# get IPv6s currently on the interface
iface_ip6s() {
ip -6 addr show "$IFACE" scope global |
sed -E -e '/inet6/!d' -e 's/.*inet6 ([0-9a-f:]+).*/\1/'
}
imds_ip4s() {
local ip4=$(imds "@nic:$IFACE,@ipv4")
local ip4s=$(echo "$ip4" | tail +2) # secondary IPv4s
local ip4p ip4_cidr ip4_gw
# non-eth0 interfaces need custom route tables
#
if [ "$IFACE" != eth0 ] && [ -n "$ip4s" ] &&
[ -z $(ip +F -4 route show table "$RTABLE" 2>/dev/null) ]; then
ip4p=$(echo "$ip4" | head -1) # primary IPv4
ip4_cidr=$(imds "@nic:$IFACE,@ipv4-net") # TODO: get from iface instead?
# TODO: this may not hold true for non-AWS clouds
ip4_gw=$(echo "$ip4_cidr" | cut -d/ -f1 |
awk -F. '{ print $1"."$2"."$3"."$4+1 }')
ip -4 route add default via "$ip4_gw" dev "$IFACE" table "$RTABLE"
ip -4 route add "$ip4_cidr" dev "$IFACE" proto kernel scope link \
src "$ip4p" table "$RTABLE"
fi
echo "$ip4s"
}
imds_ip6s() {
local ip6s gw tries=20
ip6s=$(imds "@nic:$IFACE,@ipv6")
# non-eth0 interfaces need custom route tables
#
# NOTE: busybox iproute2 doesn't do 'route show table' properly for IPv6,
# so iproute2-minimal package is required!
#
if [ "$IFACE" != eth0 ] && [ -n "$ip6s" ] &&
[ -z $(ip +F -6 route show table "$RTABLE" 2>/dev/null) ]; then
while true; do
gw=$(ip -6 route show dev "$IFACE" default | awk '{ print $3 }')
[ -n "$gw" ] && break
let tries--
if [ "$tries" -eq 0 ]; then
log -s warn "Unable to get IPv6 gateway RA after 10s"
break
fi
sleep 0.5
done
ip -6 route add default via "$gw" dev "$IFACE" table "$RTABLE"
fi
echo "$ip6s"
}
in_list() {
echo "$2" | grep -q "^$1$"
}
# ip_addr {4|6} {add|del} <ip>
ip_addr() {
local mask=32 # IPv4 always /32
[ "$1" -eq 6 ] && mask=128 # IPv6 always /128
ip -"$1" addr "$2" "$3/$mask" dev "$IFACE"
# TODO: only non eth0? delegated ipv[46] prefixes?
[ "$IFACE" = eth0 ] && return
# non-eth0 interfaces get rules associating IPs with route tables
ip -"$1" rule "$2" from "$3" lookup "$RTABLE"
}
# sync_ips {4|6} "<imds-ips>" "<iface-ips>"
sync_ips() {
local i
# remove extra IPs
for i in $3; do
in_list "$i" "$2" || ip_addr "$1" del "$i"
done
# add missing IPs
for i in $2; do
in_list "$i" "$3" || ip_addr "$1" add "$i"
done
}
imds_iface_sync() {
log -s info "SYNCING: $IFACE"
sync_ips 4 "$(imds_ip4s)" "$(iface_ip4s)"
sync_ips 6 "$(imds_ip6s)" "$(iface_ip6s)"
log -s info "FINISHED: $IFACE"
}
case "$PHASE" in
post-up)
# TODO: daemonize this
imds_iface_sync
;;
pre-down)
# TODO: kill daemon, maybe some cleanup
;;
*)
esac

14
usr/libexec/ifupdown-ng/imds Executable file
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@ -0,0 +1,14 @@
#!/bin/sh
# vim: set ts=8 noet:
# Tiny Cloud IMDS ifupdown-ng executor
case "$PHASE" in
post-up)
/sbin/imds-net-sync
;;
pre-down)
/sbin/imds-net-sync -k
;;
*) ;;
esac