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Merge pull request #58104 from ihmccreery/no-firewall

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Automatic merge from submit-queue (batch tested with PRs 58104, 58492, 58491). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Optionally prevent metadata concealment firewall from being set

**What this PR does / why we need it**: GCP: allow a master to not include a metadata concealment firewall rule (if it's not running the metadata proxy).

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
GCP: allow a master to not include a metadata concealment firewall rule (if it's not running the metadata proxy).
```
This commit is contained in:
Kubernetes Submit Queue 2018-01-18 21:57:29 -08:00 committed by GitHub
commit 7ad797e1cc
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3 changed files with 5 additions and 3 deletions
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2
cluster/gce/config-default.sh
View File

@ -186,7 +186,7 @@ if [[ ${ENABLE_METADATA_CONCEALMENT:-} == "true" ]]; then
# Put the necessary label on the node so the daemonset gets scheduled.
NODE_LABELS="${NODE_LABELS},beta.kubernetes.io/metadata-proxy-ready=true"
# Add to the provider custom variables.
PROVIDER_VARS="${PROVIDER_VARS:-} ENABLE_METADATA_CONCEALMENT"
PROVIDER_VARS="${PROVIDER_VARS:-} ENABLE_METADATA_CONCEALMENT METADATA_CONCEALMENT_NO_FIREWALL"
fi
# Optional: Enable node logging.

2
cluster/gce/config-test.sh
View File

@ -216,7 +216,7 @@ if [[ ${ENABLE_METADATA_CONCEALMENT:-} == "true" ]]; then
# Put the necessary label on the node so the daemonset gets scheduled.
NODE_LABELS="${NODE_LABELS},beta.kubernetes.io/metadata-proxy-ready=true"
# Add to the provider custom variables.
PROVIDER_VARS="${PROVIDER_VARS:-} ENABLE_METADATA_CONCEALMENT"
PROVIDER_VARS="${PROVIDER_VARS:-} ENABLE_METADATA_CONCEALMENT METADATA_CONCEALMENT_NO_FIREWALL"
fi
# Optional: Enable node logging.

4
cluster/gce/gci/configure-helper.sh
View File

@ -77,7 +77,9 @@ function config-ip-firewall {
iptables -w -t nat -A IP-MASQ -m comment --comment "ip-masq: outbound traffic is subject to MASQUERADE (must be last in chain)" -j MASQUERADE
fi
if [[ "${ENABLE_METADATA_CONCEALMENT:-}" == "true" ]]; then
# If METADATA_CONCEALMENT_NO_FIREWALL is set, don't create a firewall on this
# node because we don't expect the daemonset to run on this node.
if [[ "${ENABLE_METADATA_CONCEALMENT:-}" == "true" ]] && [[ ! "${METADATA_CONCEALMENT_NO_FIREWALL:-}" == "true" ]]; then
echo "Add rule for metadata concealment"
iptables -w -t nat -I PREROUTING -p tcp -d 169.254.169.254 --dport 80 -m comment --comment "metadata-concealment: bridge traffic to metadata server goes to metadata proxy" -j DNAT --to-destination 127.0.0.1:988
fi