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Signed-off-by: Derek McGowan <derek@mcg.dev>
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| Original file line number | Diff line number | Diff line change |
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| #!/bin/bash | ||
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| # Copyright The containerd Authors. | ||
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| # Licensed under the Apache License, Version 2.0 (the "License"); | ||
| # you may not use this file except in compliance with the License. | ||
| # You may obtain a copy of the License at | ||
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| # http://www.apache.org/licenses/LICENSE-2.0 | ||
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| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
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| set -eu -o pipefail | ||
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| destdir="${destdir:-"C:\\Program Files\\containerd"}" | ||
| WINCNI_BIN_DIR="${destdir}/cni" | ||
| WINCNI_PKG=github.com/Microsoft/windows-container-networking | ||
| WINCNI_VERSION=aa10a0b31e9f72937063436454def1760b858ee2 | ||
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| go get -d "${WINCNI_PKG}/..." | ||
| cd "${GOPATH}/src/${WINCNI_PKG}" | ||
| git checkout "${WINCNI_VERSION}" | ||
| make all | ||
| install -D -m 755 "out/nat.exe" "${WINCNI_BIN_DIR}/nat.exe" | ||
| install -D -m 755 "out/sdnbridge.exe" "${WINCNI_BIN_DIR}/sdnbridge.exe" | ||
| install -D -m 755 "out/sdnoverlay.exe" "${WINCNI_BIN_DIR}/sdnoverlay.exe" | ||
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| CNI_CONFIG_DIR="${destdir}/cni/conf" | ||
| mkdir -p "${CNI_CONFIG_DIR}" | ||
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| # split_ip splits ip into a 4-element array. | ||
| split_ip() { | ||
| local -r varname="$1" | ||
| local -r ip="$2" | ||
| for i in {0..3}; do | ||
| eval "$varname"[$i]=$( echo "$ip" | cut -d '.' -f $((i + 1)) ) | ||
| done | ||
| } | ||
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| # subnet gets subnet for a gateway, e.g. 192.168.100.0/24. | ||
| calculate_subnet() { | ||
| local -r gateway="$1" | ||
| local -r prefix_len="$2" | ||
| split_ip gateway_array "$gateway" | ||
| local len=$prefix_len | ||
| for i in {0..3}; do | ||
| if (( len >= 8 )); then | ||
| mask=255 | ||
| elif (( len > 0 )); then | ||
| mask=$(( 256 - 2 ** ( 8 - len ) )) | ||
| else | ||
| mask=0 | ||
| fi | ||
| (( len -= 8 )) | ||
| result_array[i]=$(( gateway_array[i] & mask )) | ||
| done | ||
| result="$(printf ".%s" "${result_array[@]}")" | ||
| result="${result:1}" | ||
| echo "$result/$((32 - prefix_len))" | ||
| } | ||
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| # nat already exists on the Windows VM, the subnet and gateway | ||
| # we specify should match that. | ||
| gateway="$(powershell -c "(Get-NetIPAddress -InterfaceAlias 'vEthernet (nat)' -AddressFamily IPv4).IPAddress")" | ||
| prefix_len="$(powershell -c "(Get-NetIPAddress -InterfaceAlias 'vEthernet (nat)' -AddressFamily IPv4).PrefixLength")" | ||
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| subnet="$(calculate_subnet "$gateway" "$prefix_len")" | ||
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| # The "name" field in the config is used as the underlying | ||
| # network type right now (see | ||
| # https://github.com/microsoft/windows-container-networking/pull/45), | ||
| # so it must match a network type in: | ||
| # https://docs.microsoft.com/en-us/windows-server/networking/technologies/hcn/hcn-json-document-schemas | ||
| bash -c 'cat >"'"${CNI_CONFIG_DIR}"'"/0-containerd-nat.conf <<EOF | ||
| { | ||
| "cniVersion": "0.2.0", | ||
| "name": "nat", | ||
| "type": "nat", | ||
| "master": "Ethernet", | ||
| "ipam": { | ||
| "subnet": "'$subnet'", | ||
| "routes": [ | ||
| { | ||
| "GW": "'$gateway'" | ||
| } | ||
| ] | ||
| }, | ||
| "capabilities": { | ||
| "portMappings": true, | ||
| "dns": true | ||
| } | ||
| } | ||
| EOF' |
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