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Commit ed30abec authored by Andy Maksymowicz's avatar Andy Maksymowicz
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Merge branch 'development' into 'master' 

Development to master

See merge request !5
parents 7cd61eae 3261d8c4
Pipeline #182325 failed with stages
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View file @ ed30abec
ARG BASE_REGISTRY=registry1.dso.mil
ARG BASE_IMAGE=ironbank/redhat/ubi/ubi8
ARG BASE_TAG=8.3
FROM openpolicyagent/proxy_init:v5 as base
FROM ${BASE_REGISTRY}/${BASE_IMAGE}:${BASE_TAG}
RUN dnf upgrade -y && \
dnf install -y iptables && \
dnf clean all && \
rm -rf /var/cache/dnf
COPY scripts/proxy_init.sh /usr/local/bin/proxy_init.sh
RUN chmod 755 /usr/local/bin/proxy_init.sh
HEALTHCHECK none
ENTRYPOINT ["/usr/local/bin/proxy_init.sh"]
LICENSE 0 → 100644
View file @ ed30abec
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README.md
View file @ ed30abec
# proxy_init # proxy_init
The proxy-init container installs iptables rules to redirect all container traffic through the Envoy proxy sidecar. More information can be found [here](https://github.com/open-policy-agent/contrib/tree/master/envoy_iptables).
The proxy_init directory contains the Istio proxy init script and a Dockerfile for building an image for the init container that installs iptables rules to redirect all container traffic through the Envoy proxy sidecar.
Ports can be whitelisted to bypass the envoy proxy by using the -w parameter with a comma separated list of ports. This is useful for application health checks that should go directly to a service.
hardening_manifest.yaml 0 → 100644
View file @ ed30abec
---
apiVersion: v1
# The repository name in registry1, excluding /ironbank/
name: "opensource/openpolicyagent/proxy_init"
# List of tags to push for the repository in registry1
# The most specific version should be the first tag and will be shown
# on ironbank.dsop.io
tags:
- "v5"
- "latest"
# Build args passed to Dockerfile ARGs
args:
BASE_IMAGE: "redhat/ubi/ubi8"
BASE_TAG: "8.3"
# Docker image labels
labels:
org.opencontainers.image.title: "proxy_init"
## Human-readable description of the software packaged in the image
org.opencontainers.image.description: "The proxy-init container installs iptables rules to redirect all container traffic through the Envoy proxy sidecar."
## License(s) under which contained software is distributed
org.opencontainers.image.licenses: "APL-2.0"
## URL to find more information on the image
org.opencontainers.image.url: "https://github.com/open-policy-agent/proxy_init"
## Name of the distributing entity, organization or individual
org.opencontainers.image.vendor: "Open Policy Agent"
org.opencontainers.image.version: "v5"
## Keywords to help with search (ex. "cicd,gitops,golang")
mil.dso.ironbank.image.keywords: "opensource"
## This value can be "opensource" or "commercial"
mil.dso.ironbank.image.type: "opensource"
## Product the image belongs to for grouping multiple images
mil.dso.ironbank.product.name: "Openpolicyagent proxy_init"
# List of resources to make available to the offline build context
resources:
- tag: openpolicyagent/proxy_init:v5
url: docker://docker.io/openpolicyagent/proxy_init@sha256:8f988a690516728b08956f2838a7a08202547e44d2c962009301d738c7a4abae
# List of project maintainers
maintainers:
- email: "shen_vickie@bah.com"
# # The name of the current container owner
name: "Vickie Shen"
# # The gitlab username of the current container owner
username: "shen_vickie"
cht_member: true
renovate.json 0 → 100644
View file @ ed30abec
{
"assignees": [
"@vickie.shen"
],
"baseBranches": [
"development"
],
"regexManagers": [
{
"fileMatch": [
"^Dockerfile$"
],
"matchStrings": [
"version=\"(?<currentValue>.*?)\""
],
"depNameTemplate": "openpolicyagent/proxy_init",
"datasourceTemplate": "docker"
},
{
"fileMatch": [
"^hardening_manifest.yaml$"
],
"matchStrings": [
"org\\.opencontainers\\.image\\.version:\\s+\"(?<currentValue>.+?)\""
],
"depNameTemplate": "openpolicyagent/proxy_init",
"datasourceTemplate": "docker"
},
{
"fileMatch": [
"^hardening_manifest.yaml$"
],
"matchStrings": [
"tags:\\s+-\\s+\"(?<currentValue>.+?)\""
],
"depNameTemplate": "openpolicyagent/proxy_init",
"datasourceTemplate": "docker"
}
]
}
\ No newline at end of file
scripts/proxy_init.sh 0 → 100644
View file @ ed30abec
#!/bin/bash
# Envoy initialization script responsible for setting up port forwarding.
set -o errexit
set -o nounset
set -o pipefail
usage() {
echo "${0} -p INBOUND_PORT -o OUTBOUND_PORT -u UID [-h]"
echo ''
echo ' -p: Specify the envoy port to which redirect all inbound TCP traffic'
echo ' -o: Specify the envoy port to which redirect all outbound TCP traffic'
echo ' -u: Specify the UID of the user for which the redirection is not'
echo ' applied. Typically, this is the UID of the proxy container'
echo ' -i: Comma separated list of IP ranges in CIDR form to redirect to envoy (optional)'
echo ' -w: Comma separated list of ports to allow inbound TCP traffic without redirecting to envoy (optional)'
echo ''
}
IP_RANGES_INCLUDE=""
WHITELIST_PORTS=""
while getopts ":p:o:u:e:i:w:h" opt; do
case ${opt} in
p)
ENVOY_IN_PORT=${OPTARG}
;;
o)
ENVOY_OUT_PORT=${OPTARG}
;;
u)
ENVOY_UID=${OPTARG}
;;
i)
IP_RANGES_INCLUDE=${OPTARG}
;;
w)
WHITELIST_PORTS=${OPTARG}
;;
h)
usage
exit 0
;;
\?)
echo "Invalid option: -$OPTARG" >&2
usage
exit 1
;;
esac
done
if [[ -z "${ENVOY_IN_PORT-}" ]] || [[ -z "${ENVOY_UID-}" ]]; then
echo "Please set both -p and -u parameters"
usage
exit 1
fi
# Create a new chain for redirecting inbound traffic to Envoy port
iptables -t nat -N ENVOY_IN_REDIRECT -m comment --comment "envoy/redirect-inbound-chain"
# Skip Envoy for whitelisted ports
if [[ WHITELIST_PORTS != "" ]]; then
IFS=,
for port in ${WHITELIST_PORTS}; do
iptables -t nat -A ENVOY_IN_REDIRECT -p tcp --dport ${port} -m conntrack --ctstate NEW,ESTABLISHED -j RETURN -m comment --comment "envoy/whitelisted-port-ingress"
done
fi
iptables -t nat -A ENVOY_IN_REDIRECT -p tcp -j REDIRECT --to-port ${ENVOY_IN_PORT} -m comment --comment "envoy/redirect-to-envoy-inbound-port"
# Redirect all inbound traffic to Envoy.
iptables -t nat -A PREROUTING -p tcp -j ENVOY_IN_REDIRECT -m comment --comment "envoy/install-envoy-inbound-prerouting"
if [[ ! -z "${ENVOY_OUT_PORT-}" ]]; then
# Create a new chain for selectively redirecting outbound packets to Envoy port
iptables -t nat -N ENVOY_OUT_REDIRECT -m comment --comment "envoy/redirect-outbound-chain"
# Jump to the ENVOY_OUT_REDIRECT chain from OUTPUT chain for all tcp traffic.
# '-j RETURN' bypasses Envoy and '-j ENVOY_OUT_REDIRECT' redirects to Envoy.
iptables -t nat -A OUTPUT -p tcp -j ENVOY_OUT_REDIRECT -m comment --comment "envoy/install-envoy-out-redirect"
# Redirect app calls back to itself via Envoy when using the service VIP or
# endpoint address, e.g. appN => Envoy (client) => Envoy (server) => appN.
iptables -t nat -A ENVOY_OUT_REDIRECT -o lo ! -d 127.0.0.1/32 -j ENVOY_IN_REDIRECT -m comment --comment "envoy/redirect-implicit-loopback"
# Avoid infinite loops. Don't redirect Envoy traffic directly back to Envoy for
# non-loopback traffic.
iptables -t nat -A ENVOY_OUT_REDIRECT -m owner --uid-owner ${ENVOY_UID} -j RETURN -m comment --comment "envoy/outbound-bypass-envoy"
# Skip redirection for Envoy-aware applications and container-to-container
# traffic both of which explicitly use localhost.
iptables -t nat -A ENVOY_OUT_REDIRECT -d 127.0.0.1/32 -j RETURN -m comment --comment "envoy/bypass-explicit-loopback"
# All outbound traffic will be redirected to Envoy by default. If
# IP_RANGES_INCLUDE is non-empty, only traffic bound for the destinations
# specified in this list will be captured.
IFS=,
if [ "${IP_RANGES_INCLUDE}" != "" ]; then
for cidr in ${IP_RANGES_INCLUDE}; do
iptables -t nat -A ENVOY_OUT_REDIRECT -d ${cidr} -p tcp -j REDIRECT --to-port ${ENVOY_OUT_PORT} -m comment --comment "envoy/redirect-ip-range-${cidr}"
done
iptables -t nat -A ENVOY_OUT_REDIRECT -p tcp -j RETURN -m comment --comment "envoy/bypass-default-outbound"
else
iptables -t nat -A ENVOY_OUT_REDIRECT -p tcp -j REDIRECT --to-port ${ENVOY_OUT_PORT} -m comment --comment "envoy/redirect-default-outbound"
#iptables -t nat -A ENVOY_OUT_REDIRECT -p tcp -j RETURN -m comment --comment "envoy/bypass-default-outbound"
fi
fi
exit 0
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