Merge pull request #1542 from buildkite/SUP-4213-configurable-docker-address-pools

Allow Docker default address pools to be changed

Author: petetomasik

packer/linux/conf/bin/bk-configure-docker.sh

@@ -57,7 +57,9 @@ if [[ "${DOCKER_NETWORKING_PROTOCOL}" == "ipv4" ]]; then
   # This is the default
   cat <<<"$(
     jq \
-      '."default-address-pools"=[{"base":"172.17.0.0/12","size":20},{"base":"192.168.0.0/16","size":24}]' \
+      --arg pool1 "${DOCKER_IPV4_ADDRESS_POOL_1:-172.17.0.0/12}" \
+      --arg pool2 "${DOCKER_IPV4_ADDRESS_POOL_2:-192.168.0.0/16}" \
+      '."default-address-pools"=[{"base":$pool1,"size":20},{"base":$pool2,"size":24}]' \
       /etc/docker/daemon.json
   )" >/etc/docker/daemon.json
 elif [[ "${DOCKER_NETWORKING_PROTOCOL}" == "dualstack" ]]; then
@@ -66,7 +68,10 @@ elif [[ "${DOCKER_NETWORKING_PROTOCOL}" == "dualstack" ]]; then
   DOCKER_EXPERIMENTAL=true
   cat <<<"$(
     jq \
-      '.ipv6=true | ."fixed-cidr-v6"="2001:db8:1::/64" | .ip6tables=true | ."default-address-pools"=[{"base":"172.17.0.0/12","size":20},{"base":"192.168.0.0/16","size":24},{"base":"2001:db8:2::/104","size":112}]' \
+      --arg pool1 "${DOCKER_IPV4_ADDRESS_POOL_1:-172.17.0.0/12}" \
+      --arg pool2 "${DOCKER_IPV4_ADDRESS_POOL_2:-192.168.0.0/16}" \
+      --arg pool6 "${DOCKER_IPV6_ADDRESS_POOL:-2001:db8:2::/104}" \
+      '.ipv6=true | ."fixed-cidr-v6"="2001:db8:1::/64" | .ip6tables=true | ."default-address-pools"=[{"base":$pool1,"size":20},{"base":$pool2,"size":24},{"base":$pool6,"size":112}]' \
       /etc/docker/daemon.json
   )" >/etc/docker/daemon.json
 else

templates/aws-stack.yml

@@ -597,6 +597,21 @@ Parameters:
       - "dualstack"
     Default: "ipv4"
 
+  DockerIPv4AddressPool1:
+    Type: String
+    Description: Primary IPv4 CIDR block for Docker default address pools. Must not conflict with host network or VPC CIDR. Only applies to Linux instances, not Windows.
+    Default: "172.17.0.0/12"
+
+  DockerIPv4AddressPool2:
+    Type: String
+    Description: Secondary IPv4 CIDR block for Docker default address pools. Only applies to Linux instances, not Windows.
+    Default: "192.168.0.0/16"
+
+  DockerIPv6AddressPool:
+    Type: String
+    Description: IPv6 CIDR block for Docker default address pools in dualstack mode. Only applies to Linux instances, not Windows.
+    Default: "2001:db8:2::/104"
+
   EnableSecretsPlugin:
     Type: String
     Description: Enables s3-secrets plugin for all pipelines
@@ -1581,6 +1596,9 @@ Resources:
                   DOCKER_USERNS_REMAP=${EnableDockerUserNamespaceRemap} \
                   DOCKER_EXPERIMENTAL=${EnableDockerExperimental} \
                   DOCKER_NETWORKING_PROTOCOL=${DockerNetworkingProtocol} \
+                  DOCKER_IPV4_ADDRESS_POOL_1=${DockerIPv4AddressPool1} \
+                  DOCKER_IPV4_ADDRESS_POOL_2=${DockerIPv4AddressPool2} \
+                  DOCKER_IPV6_ADDRESS_POOL=${DockerIPv6AddressPool} \
                   BUILDKITE_ENABLE_INSTANCE_STORAGE="${EnableInstanceStorage}" \
                     /usr/local/bin/bk-configure-docker.sh
                   --==BOUNDARY==