feature: version 1.0.0 of working keepalived as static pod
This commit is contained in:
parent
61550610ab
commit
f34707a8ad
GPG Key ID:
098FB66FC0475E70
37
Dockerfile
37
Dockerfile
@ -1,16 +1,39 @@
|
||||
FROM alpine:latest
|
||||
FROM alpine:3.18
|
||||
|
||||
LABEL architecture="$TARGETPLATFORM" \
|
||||
license="beerware" \
|
||||
name="keepalived" \
|
||||
summary="Alpine based keepalived container" \
|
||||
mantainer="antoinroux@hotmail.fr"
|
||||
|
||||
RUN apk add --no-cache \
|
||||
bash \
|
||||
curl \
|
||||
ipvsadm \
|
||||
iproute2 \
|
||||
keepalived \
|
||||
gettext \
|
||||
&& addgroup -S keepalived_script \
|
||||
&& adduser -S -s /sbin/nologin -G keepalived_script -H keepalived_script
|
||||
|
||||
COPY check_apiserver.sh /usr/lib/keepalived/scripts/chk_kube_apiserver.sh
|
||||
ENV STATE BACKUP
|
||||
ENV INTERFACE enp3s0
|
||||
ENV PRIORITY 200
|
||||
ENV PASSWORD ""
|
||||
ENV SRC_IP ""
|
||||
ENV PEER_IP_0 ""
|
||||
ENV PEER_IP_1 ""
|
||||
|
||||
COPY init.sh /
|
||||
RUN chmod +x /init.sh
|
||||
CMD ["/init.sh"]
|
||||
COPY --chmod=750 --chown=keepalived_script:keepalived_script check_apiserver.sh /usr/lib/keepalived/scripts/chk_kube_apiserver.sh
|
||||
COPY keepalived.template.conf /etc/keepalived/keepalived.template.conf
|
||||
|
||||
COPY --chmod=750 init.sh /
|
||||
|
||||
ENTRYPOINT ["/init.sh"]
|
||||
CMD ["/usr/sbin/keepalived", "--dont-fork", "--log-console"]
|
||||
|
||||
# Customise keepalived with:
|
||||
# args: # override options in the Dockerfile
|
||||
# - --vrrp
|
||||
# - --log-detail
|
||||
# - --dump-conf
|
||||
# - --use-file=/etc/keepalived/keepalived.conf
|
||||
# CMD ["--vrrp","--log-detail","--dump-conf"]
|
||||
|
||||
3
Makefile
3
Makefile
@ -12,7 +12,8 @@ VERBOSITY=debug
|
||||
## build
|
||||
|
||||
imageKeepalived:
|
||||
$(shell docker-multi-arch-builder build -n keepalived-k8s --platforms $(PLATFORM) -v $(VERBOSITY))
|
||||
docker manifest rm $(REGISTRY_IP):5000/keepalived-k8s:latest || true
|
||||
docker-multi-arch-builder build -n keepalived-k8s --platforms $(PLATFORM) -v $(VERBOSITY)
|
||||
|
||||
## management
|
||||
|
||||
|
||||
147
init.sh
147
init.sh
@ -1,146 +1,5 @@
|
||||
#!/bin/bash
|
||||
#!/bin/sh
|
||||
|
||||
set -e
|
||||
set -o pipefail
|
||||
envsubst < /etc/keepalived/keepalived.template.conf > /etc/keepalived/keepalived.conf
|
||||
|
||||
config_keepalived() {
|
||||
if ! compgen -A variable | grep -q -E 'KEEPALIVED_VIRTUAL_IPADDRESS_[0-9]{1,3}'; then
|
||||
echo "[$(date)][KEEPALIVED] No KEEPALIVED_VIRTUAL_IPADDRESS_ varibles detected."
|
||||
return 1
|
||||
fi
|
||||
|
||||
KEEPALIVED_STATE=${KEEPALIVED_STATE:-MASTER}
|
||||
|
||||
if [[ "${KEEPALIVED_STATE^^}" == 'MASTER' ]]; then
|
||||
KEEPALIVED_PRIORITY=${KEEPALIVED_PRIORITY:-200}
|
||||
elif [[ "${KEEPALIVED_STATE^^}" == 'BACKUP' ]]; then
|
||||
KEEPALIVED_PRIORITY=${KEEPALIVED_PRIORITY:-100}
|
||||
fi
|
||||
|
||||
KEEPALIVED_INTERFACE=${KEEPALIVED_INTERFACE:-eth0}
|
||||
KEEPALIVED_VIRTUAL_ROUTER_ID=${KEEPALIVED_VIRTUAL_ROUTER_ID:-1}
|
||||
KEEPALIVED_ADVERT_INT=${KEEPALIVED_ADVERT_INT:-1}
|
||||
KEEPALIVED_AUTH_PASS=${KEEPALIVED_AUTH_PASS:-"pwd$KEEPALIVED_VIRTUAL_ROUTER_ID"}
|
||||
|
||||
if [[ ! $KEEPALIVED_UNICAST_SRC_IP ]]; then
|
||||
bind_target="$(ip addr show "$KEEPALIVED_INTERFACE" | \
|
||||
grep -m 1 -E -o 'inet [0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | awk '{print $2}')"
|
||||
KEEPALIVED_UNICAST_SRC_IP="$bind_target"
|
||||
fi
|
||||
|
||||
{
|
||||
echo 'global_defs {'
|
||||
echo 'router_id LVS_MAIN'
|
||||
echo 'enable_script_security'
|
||||
echo '}'
|
||||
} > "$KEEPALIVED_CONF"
|
||||
|
||||
if [[ ${KEEPALIVED_KUBE_APISERVER_CHECK,,} == 'true' ]]; then
|
||||
# if no address supplied, assume its the first (or only) VIP
|
||||
if [[ ! $KUBE_APISERVER_ADDRESS ]]; then
|
||||
kube_api_vip="$(compgen -A variable | grep -E 'KEEPALIVED_VIRTUAL_IPADDRESS_[0-9]{1,3}' | head -1)"
|
||||
KUBE_APISERVER_ADDRESS="$(echo "${!kube_api_vip}" | grep -o -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')"
|
||||
fi
|
||||
KUBE_APISERVER_PORT=${KUBE_APISERVER_PORT:-6443}
|
||||
KUBE_APISERVER_CHK_INTERVAL=${KUBE_APISERVER_CHK_INTERVAL:-'3'}
|
||||
KUBE_APISERVER_CHK_WEIGHT=${KUBE_APISERVER_CHK_WEIGHT:-'-50'}
|
||||
KUBE_APISERVER_CHK_FALL=${KUBE_APISERVER_CHK_FALL:-'10'}
|
||||
KUBE_APISERVER_CHK_RISE=${KUBE_APISERVER_CHK_RISE:-'2'}
|
||||
CHECK_SCRIPT_PATH=${CHECK_SCRIPT_PATH:-'/usr/lib/keepalived/scripts/chk_kube_apiserver.sh'}
|
||||
chmod +x $CHECK_SCRIPT_PATH
|
||||
{
|
||||
echo 'vrrp_script chk_kube_apiserver {'
|
||||
echo " script \"$CHECK_SCRIPT_PATH $KUBE_APISERVER_ADDRESS $KUBE_APISERVER_PORT\""
|
||||
echo " interval $KUBE_APISERVER_CHK_INTERVAL"
|
||||
echo " fall $KUBE_APISERVER_CHK_FALL"
|
||||
echo " rise $KUBE_APISERVER_CHK_RISE"
|
||||
echo " weight $KUBE_APISERVER_CHK_WEIGHT"
|
||||
echo '}'
|
||||
} >> "$KEEPALIVED_CONF"
|
||||
fi
|
||||
|
||||
{
|
||||
echo 'vrrp_instance MAIN {'
|
||||
echo " state $KEEPALIVED_STATE"
|
||||
echo " interface $KEEPALIVED_INTERFACE"
|
||||
echo " virtual_router_id $KEEPALIVED_VIRTUAL_ROUTER_ID"
|
||||
echo " priority $KEEPALIVED_PRIORITY"
|
||||
echo " advert_int $KEEPALIVED_ADVERT_INT"
|
||||
echo " unicast_src_ip $KEEPALIVED_UNICAST_SRC_IP"
|
||||
echo ' unicast_peer {'
|
||||
} >> "$KEEPALIVED_CONF"
|
||||
for peer in $(compgen -A variable | grep -E "KEEPALIVED_UNICAST_PEER_[0-9]{1,3}"); do
|
||||
echo " ${!peer}" >> "$KEEPALIVED_CONF"
|
||||
done
|
||||
{
|
||||
echo ' }'
|
||||
echo ' authentication {'
|
||||
echo ' auth_type PASS'
|
||||
echo " auth_pass $KEEPALIVED_AUTH_PASS"
|
||||
echo ' }'
|
||||
echo ' virtual_ipaddress {'
|
||||
} >> "$KEEPALIVED_CONF"
|
||||
for vip in $(compgen -A variable | grep -E 'KEEPALIVED_VIRTUAL_IPADDRESS_[0-9]{1,3}'); do
|
||||
echo " ${!vip}" >> "$KEEPALIVED_CONF"
|
||||
done
|
||||
echo ' }' >> "$KEEPALIVED_CONF"
|
||||
|
||||
if compgen -A variable | grep -q -E 'KEEPALIVED_VIRTUAL_IPADDRESS_EXCLUDED_[0-9]{1,3}'; then
|
||||
echo ' virtual_ipaddress_excluded {' >> "$KEEPALIVED_CONF"
|
||||
for evip in $(compgen -A variable | grep -E 'KEEPALIVED_VIRTUAL_IPADDRESS_EXCLUDED_[0-9]{1,3}'); do
|
||||
echo " ${!evip}" >> "$KEEPALIVED_CONF"
|
||||
done
|
||||
echo ' }' >> "$KEEPALIVED_CONF"
|
||||
fi
|
||||
|
||||
if compgen -A variable | grep -q -E 'KEEPALIVED_TRACK_INTERFACE_[0-9]{1,3}'; then
|
||||
echo ' track_interface {' >> "$KEEPALIVED_CONF"
|
||||
for interface in $(compgen -A variable | grep -E 'KEEPALIVED_TRACK_INTERFACE_[0-9]{1,3}'); do
|
||||
echo " ${!interface}" >> "$KEEPALIVED_CONF"
|
||||
done
|
||||
echo ' }' >> "$KEEPALIVED_CONF"
|
||||
else
|
||||
{
|
||||
echo ' track_interface {'
|
||||
echo " $KEEPALIVED_INTERFACE"
|
||||
echo '}'
|
||||
} >> "$KEEPALIVED_CONF"
|
||||
fi
|
||||
if [[ ${KEEPALIVED_KUBE_APISERVER_CHECK,,} == 'true' ]]; then
|
||||
{
|
||||
echo ' track_script {'
|
||||
echo ' chk_kube_apiserver'
|
||||
echo ' }'
|
||||
} >> "$KEEPALIVED_CONF"
|
||||
fi
|
||||
|
||||
echo '}' >> "$KEEPALIVED_CONF"
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
init_vars() {
|
||||
KEEPALIVED_AUTOCONF=${KEEPALIVED_AUTOCONF:-true}
|
||||
KEEPALIVED_DEBUG=${KEEPALIVED_DEBUG:-false}
|
||||
KEEPALIVED_KUBE_APISERVER_CHECK=${KEEPALIVED_KUBE_APISERVER_CHECK:-false}
|
||||
KEEPALIVED_CONF=${KEEPALIVED_CONF:-/etc/keepalived/keepalived.conf}
|
||||
KEEPALIVED_VAR_RUN=${KEEPALIVED_VAR_RUN:-/var/run/keepalived}
|
||||
if [[ ${KEEPALIVED_DEBUG,,} == 'true' ]]; then
|
||||
local kd_cmd="/usr/sbin/keepalived -n -l -D -f $KEEPALIVED_CONF"
|
||||
else
|
||||
local kd_cmd="/usr/sbin/keepalived -n -l -f $KEEPALIVED_CONF"
|
||||
fi
|
||||
KEEPALIVED_CMD=${KEEPALIVED_CMD:-"$kd_cmd"}
|
||||
}
|
||||
|
||||
main() {
|
||||
init_vars
|
||||
if [[ ${KEEPALIVED_AUTOCONF,,} == 'true' ]]; then
|
||||
config_keepalived
|
||||
fi
|
||||
rm -fr "$KEEPALIVED_VAR_RUN"
|
||||
# shellcheck disable=SC2086
|
||||
exec $KEEPALIVED_CMD
|
||||
}
|
||||
|
||||
main
|
||||
exec "$@"
|
||||
|
||||
50
keepalived.template.conf
Normal file
50
keepalived.template.conf
Normal file
@ -0,0 +1,50 @@
|
||||
global_defs {
|
||||
vrrp_version 2
|
||||
vrrp_garp_master_delay 1
|
||||
vrrp_garp_master_refresh 60
|
||||
enable_script_security
|
||||
}
|
||||
|
||||
vrrp_script haproxy-check {
|
||||
# -0 checks if the process is running
|
||||
script "/usr/lib/keepalived/scripts/chk_kube_apiserver.sh 192.168.2.4 6443"
|
||||
interval 2
|
||||
weight 20
|
||||
user keepalived_script
|
||||
}
|
||||
|
||||
vrrp_instance haproxy-virtual-ip {
|
||||
state $STATE
|
||||
|
||||
# Make sure the interface is aligned with your server's network interface
|
||||
interface $INTERFACE
|
||||
|
||||
# The virtual router ID must be unique to each VRRP instance that you define
|
||||
virtual_router_id 55
|
||||
|
||||
# Make sure the priority is higher on the master server than on backup servers
|
||||
priority $PRIORITY
|
||||
|
||||
# advertisement interval, 1 second
|
||||
advert_int 1
|
||||
|
||||
authentication {
|
||||
auth_type PASS
|
||||
auth_pass $PASSWORD
|
||||
}
|
||||
|
||||
unicast_src_ip $SRC_IP
|
||||
|
||||
unicast_peer {
|
||||
$PEER_IP_0
|
||||
$PEER_IP_1
|
||||
}
|
||||
|
||||
virtual_ipaddress {
|
||||
192.168.2.4/32
|
||||
}
|
||||
|
||||
track_script {
|
||||
haproxy-check weight 20
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user