mirror of https://github.com/containers/podman.git
Remove unused rootless-cni-infra container files
Signed-off-by: Paul Holzinger <paul.holzinger@web.de>
This commit is contained in:
Paul Holzinger
parent
db19224b6d
commit
d7e003f362
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@ -1,36 +0,0 @@
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ARG GOLANG_VERSION=1.15
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ARG ALPINE_VERSION=3.12
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ARG CNI_VERSION=v0.8.0
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ARG CNI_PLUGINS_VERSION=v0.8.7
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ARG DNSNAME_VERSION=v1.1.1
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FROM golang:${GOLANG_VERSION}-alpine${ALPINE_VERSION} AS golang-base
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RUN apk add --no-cache git
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FROM golang-base AS cnitool
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RUN git clone https://github.com/containernetworking/cni /go/src/github.com/containernetworking/cni
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WORKDIR /go/src/github.com/containernetworking/cni
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ARG CNI_VERSION
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RUN git checkout ${CNI_VERSION}
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RUN go build -o /cnitool ./cnitool
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FROM golang-base AS dnsname
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RUN git clone https://github.com/containers/dnsname /go/src/github.com/containers/dnsname
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WORKDIR /go/src/github.com/containers/dnsname
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ARG DNSNAME_VERSION
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RUN git checkout ${DNSNAME_VERSION}
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RUN go build -o /dnsname ./plugins/meta/dnsname
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FROM alpine:${ALPINE_VERSION}
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RUN apk add --no-cache curl dnsmasq iptables ip6tables iproute2
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ARG TARGETARCH
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ARG CNI_PLUGINS_VERSION
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RUN mkdir -p /opt/cni/bin && \
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curl -fsSL https://github.com/containernetworking/plugins/releases/download/${CNI_PLUGINS_VERSION}/cni-plugins-linux-${TARGETARCH}-${CNI_PLUGINS_VERSION}.tgz | tar xz -C /opt/cni/bin
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COPY --from=cnitool /cnitool /usr/local/bin
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COPY --from=dnsname /dnsname /opt/cni/bin
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COPY rootless-cni-infra /usr/local/bin
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ENV CNI_PATH=/opt/cni/bin
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CMD ["sleep", "infinity"]
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ENV ROOTLESS_CNI_INFRA_VERSION=5
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@ -1,25 +0,0 @@
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# rootless-cni-infra
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Infra container for CNI-in-slirp4netns.
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## How it works
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When a CNI network is specified for `podman run` in rootless mode, Podman launches the `rootless-cni-infra` container to execute CNI plugins inside slirp4netns.
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The infra container is created per user, by executing an equivalent of:
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`podman run -d --name rootless-cni-infra --pid=host --privileged -v $HOME/.config/cni/net.d:/etc/cni/net.d rootless-cni-infra`.
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The infra container is automatically deleted when no CNI network is in use.
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Podman then allocates a CNI netns in the infra container, by executing an equivalent of:
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`podman exec rootless-cni-infra rootless-cni-infra alloc $CONTAINER_ID $NETWORK_NAME $POD_NAME`.
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The allocated netns is deallocated when the container is being removed, by executing an equivalent of:
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`podman exec rootless-cni-infra rootless-cni-infra dealloc $CONTAINER_ID $NETWORK_NAME`.
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The container images live on `quay.io/libpod/rootless-cni-infra`. The tags have the format `$version-$architecture`. Please make sure to increase the version number in the Containerfile (i.e., `ROOTLESS_CNI_INFRA_VERSION`) when applying changes to this directory. After committing the changes, upload the image(s) with the corresponding tag.
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## Directory layout
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* `/run/rootless-cni-infra/${CONTAINER_ID}/pid`: PID of the `sleep infinity` process that corresponds to the allocated netns
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* `/run/rootless-cni-infra/${CONTAINER_ID}/attached/${NETWORK_NAME}`: CNI result
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* `/run/rootless-cni-infra/${CONTAINER_ID}/attached-args/${NETWORK_NAME}`: CNI args
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@ -1,181 +0,0 @@
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#!/bin/sh
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set -eu
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ARG0="$0"
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BASE="/run/rootless-cni-infra"
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wait_unshare_net() {
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pid="$1"
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# NOTE: busybox shell doesn't support the `for ((i=0; i < $MAX; i++)); do foo; done` statement
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i=0
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while :; do
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if [ "$(readlink /proc/self/ns/net)" != "$(readlink /proc/${pid}/ns/net)" ]; then
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break
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fi
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sleep 0.1
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if [ $i -ge 10 ]; then
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echo >&2 "/proc/${pid}/ns/net cannot be unshared"
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exit 1
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fi
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i=$((i + 1))
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done
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}
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# CLI subcommand: "alloc $CONTAINER_ID $NETWORK_NAME $POD_NAME $IP $MAC $CAP_ARGS"
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cmd_entrypoint_alloc() {
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if [ "$#" -ne 6 ]; then
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echo >&2 "Usage: $ARG0 alloc CONTAINER_ID NETWORK_NAME POD_NAME IP MAC CAP_ARGS"
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exit 1
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fi
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ID="$1"
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NET="$2"
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K8S_POD_NAME="$3"
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IP="$4"
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MAC="$5"
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CAP_ARGS="$6"
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dir="${BASE}/${ID}"
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mkdir -p "${dir}/attached" "${dir}/attached-args"
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pid=""
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if [ -f "${dir}/pid" ]; then
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pid=$(cat "${dir}/pid")
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else
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unshare -n sleep infinity &
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pid="$!"
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wait_unshare_net "${pid}"
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echo "${pid}" >"${dir}/pid"
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nsenter -t "${pid}" -n ip link set lo up
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fi
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CNI_ARGS="IgnoreUnknown=1;K8S_POD_NAME=${K8S_POD_NAME}"
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if [ "$IP" ]; then
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CNI_ARGS="$CNI_ARGS;IP=${IP}"
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fi
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if [ "$MAC" ]; then
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CNI_ARGS="$CNI_ARGS;MAC=${MAC}"
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fi
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if [ "$CAP_ARGS" ]; then
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CAP_ARGS="$CAP_ARGS"
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fi
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nwcount=$(find "${dir}/attached" -type f | wc -l)
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CNI_IFNAME="eth${nwcount}"
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export CNI_ARGS CNI_IFNAME CAP_ARGS
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cnitool add "${NET}" "/proc/${pid}/ns/net" >"${dir}/attached/${NET}"
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echo "${CNI_ARGS}" >"${dir}/attached-args/${NET}"
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# return the result
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ns="/proc/${pid}/ns/net"
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echo "{\"ns\":\"${ns}\"}"
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}
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# CLI subcommand: "dealloc $CONTAINER_ID $NETWORK_NAME"
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cmd_entrypoint_dealloc() {
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if [ "$#" -ne 2 ]; then
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echo >&2 "Usage: $ARG0 dealloc CONTAINER_ID NETWORK_NAME"
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exit 1
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fi
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ID=$1
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NET=$2
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dir="${BASE}/${ID}"
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if [ ! -f "${dir}/pid" ]; then
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exit 0
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fi
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pid=$(cat "${dir}/pid")
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if [ -f "${dir}/attached-args/${NET}" ]; then
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CNI_ARGS=$(cat "${dir}/attached-args/${NET}")
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export CNI_ARGS
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fi
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cnitool del "${NET}" "/proc/${pid}/ns/net"
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rm -f "${dir}/attached/${NET}" "${dir}/attached-args/${NET}"
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nwcount=$(find "${dir}/attached" -type f | wc -l)
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if [ "${nwcount}" = 0 ]; then
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kill -9 "${pid}"
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rm -rf "${dir}"
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fi
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# return empty json
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echo "{}"
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}
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# CLI subcommand: "is-idle"
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cmd_entrypoint_is_idle() {
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if [ ! -d ${BASE} ]; then
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echo '{"idle": true}'
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elif [ -z "$(ls -1 ${BASE})" ]; then
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echo '{"idle": true}'
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else
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echo '{"idle": false}'
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fi
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}
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# CLI subcommand: "print-cni-result $CONTAINER_ID $NETWORK_NAME"
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cmd_entrypoint_print_cni_result() {
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if [ "$#" -ne 2 ]; then
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echo >&2 "Usage: $ARG0 print-cni-result CONTAINER_ID NETWORK_NAME"
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exit 1
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fi
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ID=$1
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NET=$2
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# the result shall be CNI JSON
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cat "${BASE}/${ID}/attached/${NET}"
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}
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# CLI subcommand: "print-netns-path $CONTAINER_ID"
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cmd_entrypoint_print_netns_path() {
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if [ "$#" -ne 1 ]; then
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echo >&2 "Usage: $ARG0 print-netns-path CONTAINER_ID"
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exit 1
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fi
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ID=$1
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pid=$(cat "${BASE}/${ID}/pid")
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path="/proc/${pid}/ns/net"
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# return the result
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echo "{\"path\":\"${path}\"}"
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}
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# CLI subcommand: "help"
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cmd_entrypoint_help() {
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echo "Usage: ${ARG0} COMMAND"
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echo
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echo "Rootless CNI Infra container"
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echo
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echo "Commands:"
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echo " alloc Allocate a netns"
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echo " dealloc Deallocate a netns"
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echo " is-idle Print whether the infra container is idle"
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echo " print-cni-result Print CNI result"
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echo " print-netns-path Print netns path"
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echo " help Print help"
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echo " version Print version"
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}
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# CLI subcommand: "version"
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cmd_entrypoint_version() {
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echo "{\"version\": \"${ROOTLESS_CNI_INFRA_VERSION}\"}"
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}
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# parse args
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command="${1:-}"
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if [ -z "$command" ]; then
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echo >&2 "No command was specified. Run \`${ARG0} help\` to see the usage."
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exit 1
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fi
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command_func=$(echo "cmd_entrypoint_${command}" | sed -e "s/-/_/g")
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if ! command -v "${command_func}" >/dev/null 2>&1; then
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echo >&2 "Unknown command: ${command}. Run \`${ARG0} help\` to see the usage."
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exit 1
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fi
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# start the command func
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shift
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"${command_func}" "$@"
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@ -338,6 +338,18 @@ func (r *Runtime) setUpOCICNIPod(podNetwork ocicni.PodNetwork) ([]ocicni.NetResu
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return results, err
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}
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// getCNIPodName return the pod name (hostname) used by CNI and the dnsname plugin.
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// If we are in the pod network namespace use the pod name otherwise the container name
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func getCNIPodName(c *Container) string {
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if c.config.NetMode.IsPod() || c.IsInfra() {
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pod, err := c.runtime.GetPod(c.PodID())
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if err == nil {
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return pod.Name()
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}
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}
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return c.Name()
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}
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// Create and configure a new network namespace for a container
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func (r *Runtime) configureNetNS(ctr *Container, ctrNS ns.NetNS) ([]*cnitypes.Result, error) {
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var requestedIP net.IP
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@ -1,372 +0,0 @@
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// +build linux
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package libpod
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import (
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"bytes"
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"context"
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"io"
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"path/filepath"
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"runtime"
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cnitypes "github.com/containernetworking/cni/pkg/types/current"
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"github.com/containernetworking/plugins/pkg/ns"
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"github.com/containers/podman/v3/libpod/define"
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"github.com/containers/podman/v3/libpod/image"
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"github.com/containers/podman/v3/pkg/env"
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"github.com/containers/podman/v3/pkg/util"
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"github.com/containers/storage/pkg/lockfile"
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"github.com/hashicorp/go-multierror"
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spec "github.com/opencontainers/runtime-spec/specs-go"
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"github.com/opencontainers/runtime-tools/generate"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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)
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// Built from ../contrib/rootless-cni-infra.
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var rootlessCNIInfraImage = map[string]string{
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"amd64": "quay.io/libpod/rootless-cni-infra@sha256:adf352454666f7ce9ca3e1098448b5ee18f89c4516471ec99447ec9ece917f36", // 5-amd64
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}
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const (
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rootlessCNIInfraContainerNamespace = "podman-system"
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rootlessCNIInfraContainerName = "rootless-cni-infra"
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)
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// AllocRootlessCNI allocates a CNI netns inside the rootless CNI infra container.
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// Locks "rootless-cni-infra.lck".
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//
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// When the infra container is not running, it is created.
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//
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// AllocRootlessCNI does not lock c. c should be already locked.
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func AllocRootlessCNI(ctx context.Context, c *Container) (ns.NetNS, []*cnitypes.Result, error) {
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networks, _, err := c.networks()
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if err != nil {
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return nil, nil, err
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}
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if len(networks) == 0 {
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return nil, nil, errors.New("rootless CNI networking requires that the container has joined at least one CNI network")
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}
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l, err := getRootlessCNIInfraLock(c.runtime)
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if err != nil {
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return nil, nil, err
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}
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l.Lock()
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defer l.Unlock()
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infra, err := ensureRootlessCNIInfraContainerRunning(ctx, c.runtime)
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if err != nil {
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return nil, nil, err
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}
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k8sPodName := getCNIPodName(c) // passed to CNI as K8S_POD_NAME
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ip := ""
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if c.config.StaticIP != nil {
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ip = c.config.StaticIP.String()
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}
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mac := ""
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if c.config.StaticMAC != nil {
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mac = c.config.StaticMAC.String()
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}
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aliases, err := c.runtime.state.GetAllNetworkAliases(c)
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if err != nil {
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return nil, nil, err
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}
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capArgs := ""
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// add network aliases json encoded as capabilityArgs for cni
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if len(aliases) > 0 {
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capabilityArgs := make(map[string]interface{})
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capabilityArgs["aliases"] = aliases
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b, err := json.Marshal(capabilityArgs)
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if err != nil {
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return nil, nil, err
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}
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capArgs = string(b)
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}
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cniResults := make([]*cnitypes.Result, len(networks))
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for i, nw := range networks {
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cniRes, err := rootlessCNIInfraCallAlloc(infra, c.ID(), nw, k8sPodName, ip, mac, capArgs)
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if err != nil {
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return nil, nil, err
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}
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cniResults[i] = cniRes
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}
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nsObj, err := rootlessCNIInfraGetNS(infra, c.ID())
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if err != nil {
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return nil, nil, err
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}
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logrus.Debugf("rootless CNI: container %q will join %q", c.ID(), nsObj.Path())
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return nsObj, cniResults, nil
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}
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// DeallocRootlessCNI deallocates a CNI netns inside the rootless CNI infra container.
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// Locks "rootless-cni-infra.lck".
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//
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// When the infra container is no longer needed, it is removed.
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//
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// DeallocRootlessCNI does not lock c. c should be already locked.
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func DeallocRootlessCNI(ctx context.Context, c *Container) error {
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networks, _, err := c.networks()
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if err != nil {
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return err
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}
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if len(networks) == 0 {
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return errors.New("rootless CNI networking requires that the container has joined at least one CNI network")
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}
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l, err := getRootlessCNIInfraLock(c.runtime)
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if err != nil {
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return err
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}
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l.Lock()
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defer l.Unlock()
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infra, _ := getRootlessCNIInfraContainer(c.runtime)
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if infra == nil {
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return nil
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}
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var errs *multierror.Error
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for _, nw := range networks {
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err := rootlessCNIInfraCallDealloc(infra, c.ID(), nw)
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if err != nil {
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errs = multierror.Append(errs, err)
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}
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}
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if isIdle, err := rootlessCNIInfraIsIdle(infra); isIdle || err != nil {
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if err != nil {
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logrus.Warn(err)
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}
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logrus.Debugf("rootless CNI: removing infra container %q", infra.ID())
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infra.lock.Lock()
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defer infra.lock.Unlock()
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if err := c.runtime.removeContainer(ctx, infra, true, false, true); err != nil {
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return err
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}
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logrus.Debugf("rootless CNI: removed infra container %q", infra.ID())
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}
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return errs.ErrorOrNil()
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}
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func getRootlessCNIInfraLock(r *Runtime) (lockfile.Locker, error) {
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fname := filepath.Join(r.config.Engine.TmpDir, "rootless-cni-infra.lck")
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return lockfile.GetLockfile(fname)
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}
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// getCNIPodName return the pod name (hostname) used by CNI and the dnsname plugin.
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// If we are in the pod network namespace use the pod name otherwise the container name
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func getCNIPodName(c *Container) string {
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if c.config.NetMode.IsPod() || c.IsInfra() {
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pod, err := c.runtime.GetPod(c.PodID())
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if err == nil {
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return pod.Name()
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}
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}
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return c.Name()
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}
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func rootlessCNIInfraCallAlloc(infra *Container, id, nw, k8sPodName, ip, mac, capArgs string) (*cnitypes.Result, error) {
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logrus.Debugf("rootless CNI: alloc %q, %q, %q, %q, %q, %q", id, nw, k8sPodName, ip, mac, capArgs)
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var err error
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_, err = rootlessCNIInfraExec(infra, "alloc", id, nw, k8sPodName, ip, mac, capArgs)
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if err != nil {
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return nil, err
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}
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||||
cniResStr, err := rootlessCNIInfraExec(infra, "print-cni-result", id, nw)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
var cniRes cnitypes.Result
|
||||
if err := json.Unmarshal([]byte(cniResStr), &cniRes); err != nil {
|
||||
return nil, errors.Wrapf(err, "unmarshaling as cnitypes.Result: %q", cniResStr)
|
||||
}
|
||||
return &cniRes, nil
|
||||
}
|
||||
|
||||
func rootlessCNIInfraCallDealloc(infra *Container, id, nw string) error {
|
||||
logrus.Debugf("rootless CNI: dealloc %q, %q", id, nw)
|
||||
_, err := rootlessCNIInfraExec(infra, "dealloc", id, nw)
|
||||
return err
|
||||
}
|
||||
|
||||
func rootlessCNIInfraIsIdle(infra *Container) (bool, error) {
|
||||
type isIdle struct {
|
||||
Idle bool `json:"idle"`
|
||||
}
|
||||
resStr, err := rootlessCNIInfraExec(infra, "is-idle")
|
||||
if err != nil {
|
||||
return false, err
|
||||
}
|
||||
var res isIdle
|
||||
if err := json.Unmarshal([]byte(resStr), &res); err != nil {
|
||||
return false, errors.Wrapf(err, "unmarshaling as isIdle: %q", resStr)
|
||||
}
|
||||
return res.Idle, nil
|
||||
}
|
||||
|
||||
func rootlessCNIInfraGetNS(infra *Container, id string) (ns.NetNS, error) {
|
||||
type printNetnsPath struct {
|
||||
Path string `json:"path"`
|
||||
}
|
||||
resStr, err := rootlessCNIInfraExec(infra, "print-netns-path", id)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
var res printNetnsPath
|
||||
if err := json.Unmarshal([]byte(resStr), &res); err != nil {
|
||||
return nil, errors.Wrapf(err, "unmarshaling as printNetnsPath: %q", resStr)
|
||||
}
|
||||
nsObj, err := ns.GetNS(res.Path)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return nsObj, nil
|
||||
}
|
||||
|
||||
func getRootlessCNIInfraContainer(r *Runtime) (*Container, error) {
|
||||
containers, err := r.GetContainersWithoutLock(func(c *Container) bool {
|
||||
return c.Namespace() == rootlessCNIInfraContainerNamespace &&
|
||||
c.Name() == rootlessCNIInfraContainerName
|
||||
})
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if len(containers) == 0 {
|
||||
return nil, nil
|
||||
}
|
||||
return containers[0], nil
|
||||
}
|
||||
|
||||
func ensureRootlessCNIInfraContainerRunning(ctx context.Context, r *Runtime) (*Container, error) {
|
||||
c, err := getRootlessCNIInfraContainer(r)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if c == nil {
|
||||
return startRootlessCNIInfraContainer(ctx, r)
|
||||
}
|
||||
st, err := c.ContainerState()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if st.State == define.ContainerStateRunning {
|
||||
logrus.Debugf("rootless CNI: infra container %q is already running", c.ID())
|
||||
return c, nil
|
||||
}
|
||||
logrus.Debugf("rootless CNI: infra container %q is %q, being started", c.ID(), st.State)
|
||||
if err := c.initAndStart(ctx); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
logrus.Debugf("rootless CNI: infra container %q is running", c.ID())
|
||||
return c, nil
|
||||
}
|
||||
|
||||
func startRootlessCNIInfraContainer(ctx context.Context, r *Runtime) (*Container, error) {
|
||||
imageName, ok := rootlessCNIInfraImage[runtime.GOARCH]
|
||||
if !ok {
|
||||
return nil, errors.Errorf("cannot find rootless-podman-network-sandbox image for %s", runtime.GOARCH)
|
||||
}
|
||||
logrus.Debugf("rootless CNI: ensuring image %q to exist", imageName)
|
||||
newImage, err := r.ImageRuntime().New(ctx, imageName, "", "", nil, nil,
|
||||
image.SigningOptions{}, nil, util.PullImageMissing, nil)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
logrus.Debugf("rootless CNI: image %q is ready", imageName)
|
||||
|
||||
g, err := generate.New("linux")
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
g.SetupPrivileged(true)
|
||||
// Set --pid=host for ease of propagating "/proc/PID/ns/net" string
|
||||
if err := g.RemoveLinuxNamespace(string(spec.PIDNamespace)); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
g.RemoveMount("/proc")
|
||||
procMount := spec.Mount{
|
||||
Destination: "/proc",
|
||||
Type: "bind",
|
||||
Source: "/proc",
|
||||
Options: []string{"rbind", "nosuid", "noexec", "nodev"},
|
||||
}
|
||||
g.AddMount(procMount)
|
||||
// Mount CNI networks
|
||||
etcCNINetD := spec.Mount{
|
||||
Destination: "/etc/cni/net.d",
|
||||
Type: "bind",
|
||||
Source: r.config.Network.NetworkConfigDir,
|
||||
Options: []string{"ro", "bind"},
|
||||
}
|
||||
g.AddMount(etcCNINetD)
|
||||
|
||||
inspectData, err := newImage.Inspect(ctx)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
imageEnv, err := env.ParseSlice(inspectData.Config.Env)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
for k, v := range imageEnv {
|
||||
g.AddProcessEnv(k, v)
|
||||
}
|
||||
if len(inspectData.Config.Cmd) == 0 {
|
||||
return nil, errors.Errorf("rootless CNI infra image %q has no command specified", imageName)
|
||||
}
|
||||
g.SetProcessArgs(inspectData.Config.Cmd)
|
||||
|
||||
var options []CtrCreateOption
|
||||
options = append(options, WithRootFSFromImage(newImage.ID(), imageName, imageName))
|
||||
options = append(options, WithCtrNamespace(rootlessCNIInfraContainerNamespace))
|
||||
options = append(options, WithName(rootlessCNIInfraContainerName))
|
||||
options = append(options, WithPrivileged(true))
|
||||
options = append(options, WithSecLabels([]string{"disable"}))
|
||||
options = append(options, WithRestartPolicy("always"))
|
||||
options = append(options, WithNetNS(nil, false, "slirp4netns", nil))
|
||||
c, err := r.NewContainer(ctx, g.Config, options...)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
logrus.Debugf("rootless CNI infra container %q is created, now being started", c.ID())
|
||||
if err := c.initAndStart(ctx); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
logrus.Debugf("rootless CNI: infra container %q is running", c.ID())
|
||||
|
||||
return c, nil
|
||||
}
|
||||
|
||||
func rootlessCNIInfraExec(c *Container, args ...string) (string, error) {
|
||||
cmd := "rootless-cni-infra"
|
||||
var (
|
||||
outB bytes.Buffer
|
||||
errB bytes.Buffer
|
||||
streams define.AttachStreams
|
||||
config ExecConfig
|
||||
)
|
||||
streams.OutputStream = &nopWriteCloser{Writer: &outB}
|
||||
streams.ErrorStream = &nopWriteCloser{Writer: &errB}
|
||||
streams.AttachOutput = true
|
||||
streams.AttachError = true
|
||||
config.Command = append([]string{cmd}, args...)
|
||||
config.Privileged = true
|
||||
logrus.Debugf("rootlessCNIInfraExec: c.ID()=%s, config=%+v, streams=%v, begin",
|
||||
c.ID(), config, streams)
|
||||
code, err := c.Exec(&config, &streams, nil)
|
||||
logrus.Debugf("rootlessCNIInfraExec: c.ID()=%s, config=%+v, streams=%v, end (code=%d, err=%v)",
|
||||
c.ID(), config, streams, code, err)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
if code != 0 {
|
||||
return "", errors.Errorf("command %s %v in container %s failed with status %d, stdout=%q, stderr=%q",
|
||||
cmd, args, c.ID(), code, outB.String(), errB.String())
|
||||
}
|
||||
return outB.String(), nil
|
||||
}
|
||||
|
||||
type nopWriteCloser struct {
|
||||
io.Writer
|
||||
}
|
||||
|
||||
func (nwc *nopWriteCloser) Close() error {
|
||||
return nil
|
||||
}
|
||||
Loading…
Reference in New Issue