From 3f7c129b6dd7461fe39b423f6bb179159b99f822 Mon Sep 17 00:00:00 2001
From: Alec Reynolds <alec+git@lando.dev>
Date: Tue, 22 Oct 2024 10:35:04 -0700
Subject: [PATCH 1/2] #244: Variable for setting the network limit.

---
 docs/networking.md           | 6 ++++++
 plugins/networking/index.js  | 2 +-
 utils/get-config-defaults.js | 1 +
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/docs/networking.md b/docs/networking.md
index af3943ef7..65274ebfd 100644
--- a/docs/networking.md
+++ b/docs/networking.md
@@ -58,3 +58,9 @@ You can also use the environment variable `LANDO_HOST_IP`.
 ```sh
 lando exec my-service -- ping "\$LANDO_HOST_IP" -c 3
 ```
+
+## Network Limits
+
+By default Docker has a limit of 32 networks. If you're running a large number of sites, you'll see a message `Lando has detected you are at Docker's network limit`, after which Lando will attempt to clean up unused networks to put you below the network limit.
+
+If you've [modified your Docker daemon](https://discussion.fedoraproject.org/t/increase-limit-of-30-docker-networks-in-a-clean-way/96622/4) to allow more networks, you can set Lando's network limit to a higher number by setting the `networkLimit` variable in [Lando's global config](./global.html).
diff --git a/plugins/networking/index.js b/plugins/networking/index.js
index 8368ab7f8..c0b7a473e 100644
--- a/plugins/networking/index.js
+++ b/plugins/networking/index.js
@@ -8,7 +8,7 @@ const _ = require('lodash');
  */
 const cleanNetworks = lando => lando.engine.getNetworks()
   .then(networks => {
-    if (_.size(networks) >= 32) {
+    if (_.size(networks) >= lando.config.networkLimit) {
       // Warn user about this action
       lando.log.warn('Lando has detected you are at Docker\'s network limit!');
       lando.log.warn('Give us a moment as we try to make space by cleaning up old networks...');
diff --git a/utils/get-config-defaults.js b/utils/get-config-defaults.js
index 45e446db9..5441dccdc 100644
--- a/utils/get-config-defaults.js
+++ b/utils/get-config-defaults.js
@@ -28,6 +28,7 @@ const defaultConfig = options => ({
   home: os.homedir(),
   isArmed: _.includes(['arm64', 'aarch64'], process.arch),
   logLevel: 'debug',
+  networkLimit: 32,
   node: process.version,
   os: {
     type: os.type(),

From 09fe395de4d9a102fd15a82c79655fe7718b9410 Mon Sep 17 00:00:00 2001
From: Alec Reynolds <1153738+reynoldsalec@users.noreply.github.com>
Date: Tue, 17 Dec 2024 11:38:33 -0800
Subject: [PATCH 2/2] #244: Add test for the networkLimit config var.

---
 examples/networking/README.md  | 7 +++++++
 examples/networking/config.yml | 1 +
 2 files changed, 8 insertions(+)
 create mode 100644 examples/networking/config.yml

diff --git a/examples/networking/README.md b/examples/networking/README.md
index 5b4e507e9..5b639135f 100644
--- a/examples/networking/README.md
+++ b/examples/networking/README.md
@@ -22,6 +22,10 @@ cp -rf index.php lemp/index.php
 cp -rf nginx.conf lemp/nginx.conf
 cp -rf .lando.lemp.yml lemp/.lando.yml
 cd lemp && lando start
+
+# Should copy .config.yml to ~/.lando/config.yml
+cp config.yml ~/.lando/config.yml
+lando --clear
 ```
 
 ## Verification commands
@@ -63,6 +67,9 @@ lando exec appserver_nginx -- curl https://appserver.landolamp.internal
 # Should even be able to connect to a database in a different app
 cd lamp
 lando exec database -- mysql -uroot -h database.landolemp.internal -e "quit"
+
+# Should see the correct network limit
+lando config | grep "networkLimit: 64"
 ```
 
 ## Destroy tests
diff --git a/examples/networking/config.yml b/examples/networking/config.yml
new file mode 100644
index 000000000..558339625
--- /dev/null
+++ b/examples/networking/config.yml
@@ -0,0 +1 @@
+networkLimit: 64