Some refactoring
parent
b63870b53b
commit
2d15685b7d
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@ -1,4 +1,4 @@
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FROM alpine
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FROM alpine:3.12
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RUN apk add --no-cache curl iproute2 iputils jq
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ADD bridget.sh /bin/bridget.sh
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CMD . /bin/bridget.sh
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CMD /bin/bridget.sh
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@ -3,7 +3,7 @@
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CNI_CONFIG="${CNI_CONFIG:-/etc/cni/net.d/10-bridget.conf}"
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usage() {
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cat <<EOF
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cat <<EOF
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Available variables:
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- BRIDGE (example: cbr0)
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@ -48,16 +48,16 @@ debug() {
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}
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next_ip() {
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local IP_HEX=$(printf '%.2X%.2X%.2X%.2X\n' `echo $1 | sed -e 's/\./ /g'`)
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local NEXT_IP_HEX=$(printf %.8X `echo $(( 0x$IP_HEX + 1 ))`)
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local NEXT_IP=$(printf '%d.%d.%d.%d\n' `echo $NEXT_IP_HEX | sed -r 's/(..)/0x\1 /g'`)
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local IP_HEX=$(printf '%.2X%.2X%.2X%.2X\n' $(echo $1 | sed -e 's/\./ /g'))
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local NEXT_IP_HEX=$(printf %.8X $(echo $((0x$IP_HEX + 1))))
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local NEXT_IP=$(printf '%d.%d.%d.%d\n' $(echo $NEXT_IP_HEX | sed -r 's/(..)/0x\1 /g'))
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echo $NEXT_IP
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}
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prev_ip() {
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local IP_HEX=$(printf '%.2X%.2X%.2X%.2X\n' `echo $1 | sed -e 's/\./ /g'`)
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local PREV_IP_HEX=$(printf %.8X `echo $(( 0x$IP_HEX - 1 ))`)
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local PREV_IP=$(printf '%d.%d.%d.%d\n' `echo $PREV_IP_HEX | sed -r 's/(..)/0x\1 /g'`)
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local IP_HEX=$(printf '%.2X%.2X%.2X%.2X\n' $(echo $1 | sed -e 's/\./ /g'))
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local PREV_IP_HEX=$(printf %.8X $(echo $((0x$IP_HEX - 1))))
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local PREV_IP=$(printf '%d.%d.%d.%d\n' $(echo $PREV_IP_HEX | sed -r 's/(..)/0x\1 /g'))
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echo $PREV_IP
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}
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@ -77,7 +77,7 @@ log "Starting bridge configuration"
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[ -z "$NODE_NAME" ] && error "NODE_NAME variable is not defined"
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# Check if bridge interface exist
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if ! ip link show "$BRIDGE" 1>/dev/null 2> /dev/null; then
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if ! ip link show "$BRIDGE" 1>/dev/null 2>/dev/null; then
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log "Adding new bridge $BRIDGE"
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ip link add dev "$BRIDGE" type bridge
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@ -92,8 +92,6 @@ fi
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log "Setting bridge $BRIDGE up"
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ip link set "$BRIDGE" up
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# ------------------------------------------------------------------------------------
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# Configure vlan
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# ------------------------------------------------------------------------------------
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@ -105,7 +103,7 @@ if ([ ! -z "$VLAN" ] || [ ! -z "$IFACE" ]) && [ "${CHECK_SLAVES:-1}" = 1 ]; then
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if [ ! -z "$VLAN" ]; then
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# check if vlan interface exist
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if ip link show "$IFACE.$VLAN" 1> /dev/null 2> /dev/null; then
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if ip link show "$IFACE.$VLAN" 1>/dev/null 2>/dev/null; then
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log "VLAN interface $IFACE.$VLAN already exist"
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else
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log "Adding new VLAN interface $IFACE.$VLAN"
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@ -130,18 +128,18 @@ if ([ ! -z "$VLAN" ] || [ ! -z "$IFACE" ]) && [ "${CHECK_SLAVES:-1}" = 1 ]; then
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SLAVEIF="$IFACE"
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fi
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if ! ip link show "$SLAVEIF" 1> /dev/null 2> /dev/null; then
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if ! ip link show "$SLAVEIF" 1>/dev/null 2>/dev/null; then
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error "$SLAVEIF does not exist"
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fi
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# check if slave interface contains right master
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MASTERIF="$(ip -o link show "$SLAVEIF" | grep -o -m1 'master [^ ]\+' | cut -d' ' -f2 )"
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MASTERIF="$(ip -o link show "$SLAVEIF" | grep -o -m1 'master [^ ]\+' | cut -d' ' -f2)"
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case "$MASTERIF" in
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"$BRIDGE" ) log "$SLAVEIF already member of $BRIDGE" ;;
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"" ) log "Adding $SLAVEIF as member to $BRIDGE"
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ip link set "$SLAVEIF" master "$BRIDGE" ;;
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* ) error "interface $SLAVEIF have another master" ;;
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"$BRIDGE") log "$SLAVEIF already member of $BRIDGE" ;;
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"" ) log "Adding $SLAVEIF as member to $BRIDGE"
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ip link set "$SLAVEIF" master "$BRIDGE" ;;
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* ) error "interface $SLAVEIF have another master" ;;
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esac
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fi
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@ -154,20 +152,22 @@ log "Starting retriving parameters"
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POD_NETWORK="${POD_NETWORK:-10.244.0.0/16}"
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NODE_NETWORK="$(getnodecidr "${NODE_NAME}")"
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if [ -z "$NODE_NETWORK" ] || [ "$NODE_NETWORK" = "null" ]; then
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error "Failed to get node cidr"
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error "Failed to get node cidr"
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fi
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set -e
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export "POD_$(ipcalc -p "$POD_NETWORK")" # POD_PREFIX
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export "POD_$(ipcalc -n "$POD_NETWORK")" # POD_NETWORK
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export "NODE_$(ipcalc -p "$NODE_NETWORK")" # NODE_PREFIX
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export "NODE_$(ipcalc -b "$NODE_NETWORK")" # NODE_BROADCAST
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export "NODE_$(ipcalc -n "$NODE_NETWORK")" # NODE_NETWORK
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export "POD_$(ipcalc -b "$POD_NETWORK")" # POD_BROADCAST
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export "POD_$(ipcalc -p "$POD_NETWORK")" # POD_PREFIX
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export "POD_$(ipcalc -n "$POD_NETWORK")" # POD_NETWORK
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export "NODE_$(ipcalc -p "$NODE_NETWORK")" # NODE_PREFIX
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export "NODE_$(ipcalc -b "$NODE_NETWORK")" # NODE_BROADCAST
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export "NODE_$(ipcalc -n "$NODE_NETWORK")" # NODE_NETWORK
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export "NODE_IP=$(next_ip "$NODE_NETWORK")" # NODE_IP
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set +e
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debug "POD_BROADCAST=$POD_BROADCAST"
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debug "POD_PREFIX=$POD_PREFIX"
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debug "POD_NETWORK=$POD_NETWORK"
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debug "NODE_PREFIX=$NODE_PREFIX"
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@ -182,7 +182,7 @@ debug "NODE_IP=$NODE_IP"
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log "Configuring $NODE_IP/$POD_PREFIX on $BRIDGE"
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ip -o addr show "$BRIDGE" | grep -o 'inet [^ ]\+' | while read _ IP; do
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# Remove bridge addresses from the same subnet, don't touch other addresses
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if [ $(ipcalc -b "$IP") = $(ipcalc -b "$POD_NETWORK/$POD_PREFIX") -a "$IP" != "$NODE_IP/$POD_PREFIX" ]; then
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if [ $(ipcalc -b "$IP") = "$POD_BROADCAST" ] && [ "$IP" != "$NODE_IP/$POD_PREFIX" ]; then
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ip addr del "$IP" dev "$BRIDGE"
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fi
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done
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@ -210,7 +210,7 @@ debug "LAST_IP=$LAST_IP"
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log "Writing $CNI_CONFIG"
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cat > $CNI_CONFIG <<EOT
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cat >$CNI_CONFIG <<EOT
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{
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"name": "bridget",
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"cniVersion": "0.2.0",
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@ -65,7 +65,7 @@ spec:
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hostPID: true
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containers:
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- name: bridget
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image: kvaps/bridget:v1.0.1
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image: docker.io/kvaps/bridget:v1.1.0
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env:
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- name: BRIDGE
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value: "cbr0"
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