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rootless-cni-infra v3: fix cleaning up DNS entries

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Fix "Old DNS entries are not cleaned up" by passing CNI_ARGS to `cnitool del`.

Fix #7789

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
This commit is contained in:
Akihiro Suda
2020-09-30 18:57:37 +09:00
parent b68b6f334d
commit eb56673b3b
3 changed files with 10 additions and 5 deletions
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5
contrib/rootless-cni-infra/Containerfile
View File

@ -2,8 +2,7 @@ ARG GOLANG_VERSION=1.15
ARG ALPINE_VERSION=3.12
ARG CNI_VERSION=v0.8.0
ARG CNI_PLUGINS_VERSION=v0.8.7
# Aug 20, 2020
ARG DNSNAME_VESION=78b4da7bbfc51c27366da630e1df1c4f2e8b1b5b
ARG DNSNAME_VESION=v1.0.0
FROM golang:${GOLANG_VERSION}-alpine${ALPINE_VERSION} AS golang-base
RUN apk add --no-cache git
@ -34,4 +33,4 @@ COPY rootless-cni-infra /usr/local/bin
ENV CNI_PATH=/opt/cni/bin
CMD ["sleep", "infinity"]
ENV ROOTLESS_CNI_INFRA_VERSION=2
ENV ROOTLESS_CNI_INFRA_VERSION=3

1
contrib/rootless-cni-infra/README.md
View File

@ -22,3 +22,4 @@ The container images live on `quay.io/libpod/rootless-cni-infra`. The tags have
* `/run/rootless-cni-infra/${CONTAINER_ID}/pid`: PID of the `sleep infinity` process that corresponds to the allocated netns
* `/run/rootless-cni-infra/${CONTAINER_ID}/attached/${NETWORK_NAME}`: CNI result
* `/run/rootless-cni-infra/${CONTAINER_ID}/attached-args/${NETWORK_NAME}`: CNI args

9
contrib/rootless-cni-infra/rootless-cni-infra
View File

@ -33,7 +33,7 @@ cmd_entrypoint_alloc() {
K8S_POD_NAME="$3"
dir="${BASE}/${ID}"
mkdir -p "${dir}/attached"
mkdir -p "${dir}/attached" "${dir}/attached-args"
pid=""
if [ -f "${dir}/pid" ]; then
@ -50,6 +50,7 @@ cmd_entrypoint_alloc() {
CNI_IFNAME="eth${nwcount}"
export CNI_ARGS CNI_IFNAME
cnitool add "${NET}" "/proc/${pid}/ns/net" >"${dir}/attached/${NET}"
echo "${CNI_ARGS}" >"${dir}/attached-args/${NET}"
# return the result
ns="/proc/${pid}/ns/net"
@ -71,8 +72,12 @@ cmd_entrypoint_dealloc() {
exit 0
fi
pid=$(cat "${dir}/pid")
if [ -f "${dir}/attached-args/${NET}" ]; then
CNI_ARGS=$(cat "${dir}/attached-args/${NET}")
export CNI_ARGS
fi
cnitool del "${NET}" "/proc/${pid}/ns/net"
rm -f "${dir}/attached/${NET}"
rm -f "${dir}/attached/${NET}" "${dir}/attached-args/${NET}"
nwcount=$(find "${dir}/attached" -type f | wc -l)
if [ "${nwcount}" = 0 ]; then