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473001be55
* vpn: ship our own container image The container image used in the VPN chart should be reproducible and stable. We're sticking close to the original nixery.dev version by building the image with nix ourselves, and then publishing the single layer from the result with Bazel OCI rules. The resulting image should be handled similar to s3proxy: it's built as a part of the Constellation release process and then consumed from a Helm chart in our registry. Co-authored-by: Malte Poll <1780588+malt3@users.noreply.github.com>
45 lines
1.2 KiB
Bash
Executable File
45 lines
1.2 KiB
Bash
Executable File
#!/bin/sh
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set -u
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if [ "$$" -eq "1" ]; then
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echo 'This script must run in the root PID namespace, but $$ == 1!' >&2
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exit 1
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fi
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myip() {
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ip -j addr show eth0 | jq -r '.[0].addr_info[] | select(.family == "inet") | .local'
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}
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# Disable source IP verification on our network interface. Otherwise, VPN
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# packets will be dropped by Cilium.
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reconcile_sip_verification() {
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# We want all of the cilium calls in this function to target the same
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# process, so that we fail if the agent restarts in between. Thus, we only
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# query the pid once per reconciliation.
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cilium_agent=$(pidof cilium-agent) || return 0
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cilium() {
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nsenter -t "${cilium_agent}" -a -r -w cilium "$@"
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}
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myendpoint=$(cilium endpoint get "ipv4:$(myip)" | jq '.[0].id') || return 0
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if [ "$(cilium endpoint config "${myendpoint}" -o json | jq -r .realized.options.SourceIPVerification)" = "Enabled" ]; then
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cilium endpoint config "${myendpoint}" SourceIPVerification=Disabled
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fi
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}
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# Set up the route from the node network namespace to the VPN pod.
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reconcile_route() {
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for cidr in ${VPN_PEER_CIDRS}; do
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nsenter -t 1 -n ip route replace "${cidr}" via "$(myip)"
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done
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}
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while true; do
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reconcile_route
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reconcile_sip_verification
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sleep 10
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done
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