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Prep v2.30.0 release: release notes, install docs, cluster docs

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Move the unreleased server notes to v2.30.0 (released October 13, 2026), bump install.md to 2.30.0,
add the experimental clustering release note and a downgrade note for the message schema change
(15 to 16), and update the stale cluster comments/docs now that the mesh cluster ships.
This commit is contained in:
binwiederhier committed 2026-10-12 02:03:02 +00:00
1 parent 8e7b5912e4
commit 33effa3bb7
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cluster/cluster.go
+1 -3
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@@ -103,9 +103,7 @@ type Cluster interface {
}
// New creates the cluster for the given config: the nop cluster when clustering is disabled (the
// single-node default), or the peer-mesh cluster otherwise. The mesh is not in this build yet, so
// an enabled config is validated and then refused; cmd refuses to start a server with
// experimental-cluster-listen set, so a running server never reaches that.
// single-node default), or the peer-mesh cluster otherwise.
func New(conf *Config, pool *db.DB, deliver DeliverFunc) (Cluster, error) {
if !conf.Enabled {
return &nopCluster{}, nil
docs/config.md
+5 -5
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@@ -2363,11 +2363,11 @@ variable before running the `ntfy` command (e.g. `export NTFY_LISTEN_HTTP=:80`).
| `cert-file` | `NTFY_CERT_FILE` | *filename* | - | HTTPS/TLS certificate file, only used if `listen-https` is set. |
| `firebase-key-file` | `NTFY_FIREBASE_KEY_FILE` | *filename* | - | If set, also publish messages to a Firebase Cloud Messaging (FCM) topic for your app. This is optional and only required to save battery when using the Android app. See [Firebase (FCM)](#firebase-fcm). |
| `database-url` | `NTFY_DATABASE_URL` | *string (connection URL)* | - | PostgreSQL connection string (e.g. `postgres://user:pass@host:5432/ntfy`). If set, uses PostgreSQL for all database-backed stores (message cache, user manager, web push) instead of SQLite. See [database options](#database-options). |
| `experimental-cluster-node-id` | `NTFY_EXPERIMENTAL_CLUSTER_NODE_ID` | *string* | - | Reserved for clustering, not functional yet. Stable per-node identifier (e.g. the hostname). |
| `experimental-cluster-listen` | `NTFY_EXPERIMENTAL_CLUSTER_LISTEN` | `[host]:port` | - | Reserved for clustering, not functional yet. Private listen address for node-to-node traffic; a server started with this set refuses to start. |
| `experimental-cluster-advertise-url` | `NTFY_EXPERIMENTAL_CLUSTER_ADVERTISE_URL` | *URL* | `http://<experimental-cluster-listen>` | Reserved for clustering, not functional yet. URL under which other nodes reach this node's cluster listener. |
| `experimental-cluster-secret` | `NTFY_EXPERIMENTAL_CLUSTER_SECRET` | *string* | - | Reserved for clustering, not functional yet. Shared secret authenticating node-to-node traffic; must match on all nodes. |
| `experimental-cluster-batch-linger` | `NTFY_EXPERIMENTAL_CLUSTER_BATCH_LINGER` | *duration* | `500ms` | Reserved for clustering, not functional yet. How long messages wait to form a node-to-node delivery batch; `0` sends immediately. |
| `experimental-cluster-node-id` | `NTFY_EXPERIMENTAL_CLUSTER_NODE_ID` | *string* | - | Experimental, not ready for production. Stable per-node identifier (e.g. the hostname). |
| `experimental-cluster-listen` | `NTFY_EXPERIMENTAL_CLUSTER_LISTEN` | `[host]:port` | - | Experimental, not ready for production. Private listen address for node-to-node traffic; setting it enables clustering (requires `database-url`). |
| `experimental-cluster-advertise-url` | `NTFY_EXPERIMENTAL_CLUSTER_ADVERTISE_URL` | *URL* | `http://<experimental-cluster-listen>` | Experimental, not ready for production. URL under which other nodes reach this node's cluster listener. |
| `experimental-cluster-secret` | `NTFY_EXPERIMENTAL_CLUSTER_SECRET` | *string* | - | Experimental, not ready for production. Shared secret authenticating node-to-node traffic; must match on all nodes. |
| `experimental-cluster-batch-linger` | `NTFY_EXPERIMENTAL_CLUSTER_BATCH_LINGER` | *duration* | `500ms` | Experimental, not ready for production. How long messages wait to form a node-to-node delivery batch; `0` sends immediately. |
| `database-replica-urls` | `NTFY_DATABASE_REPLICA_URLS` | *list of strings (connection URLs)* | - | PostgreSQL read replica connection strings. Non-critical read-only queries are distributed across replicas (round-robin) with automatic fallback to primary. Requires `database-url`. |
| `cache-file` | `NTFY_CACHE_FILE` | *filename* | - | If set, messages are cached in a local SQLite database instead of only in-memory. This allows for service restarts without losing messages in support of the since= parameter. See [message cache](#message-cache). |
| `cache-duration` | `NTFY_CACHE_DURATION` | *duration* | 12h | Duration for which messages will be buffered before they are deleted. This is required to support the `since=...` and `poll=1` parameter. Set this to `0` to disable the cache entirely. |
docs/install.md
+38 -38
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@@ -34,37 +34,37 @@ as a service starting at boot time.
=== "x86_64/amd64"
```bash
wget https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_linux_amd64.tar.gz
tar zxvf ntfy_2.29.0_linux_amd64.tar.gz
sudo cp -a ntfy_2.29.0_linux_amd64/ntfy /usr/local/bin/ntfy
sudo mkdir /etc/ntfy && sudo cp ntfy_2.29.0_linux_amd64/{client,server}/*.yml /etc/ntfy
wget https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_linux_amd64.tar.gz
tar zxvf ntfy_2.30.0_linux_amd64.tar.gz
sudo cp -a ntfy_2.30.0_linux_amd64/ntfy /usr/local/bin/ntfy
sudo mkdir /etc/ntfy && sudo cp ntfy_2.30.0_linux_amd64/{client,server}/*.yml /etc/ntfy
sudo ntfy serve
```
=== "armv6"
```bash
wget https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_linux_armv6.tar.gz
tar zxvf ntfy_2.29.0_linux_armv6.tar.gz
sudo cp -a ntfy_2.29.0_linux_armv6/ntfy /usr/bin/ntfy
sudo mkdir /etc/ntfy && sudo cp ntfy_2.29.0_linux_armv6/{client,server}/*.yml /etc/ntfy
wget https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_linux_armv6.tar.gz
tar zxvf ntfy_2.30.0_linux_armv6.tar.gz
sudo cp -a ntfy_2.30.0_linux_armv6/ntfy /usr/bin/ntfy
sudo mkdir /etc/ntfy && sudo cp ntfy_2.30.0_linux_armv6/{client,server}/*.yml /etc/ntfy
sudo ntfy serve
```
=== "armv7/armhf"
```bash
wget https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_linux_armv7.tar.gz
tar zxvf ntfy_2.29.0_linux_armv7.tar.gz
sudo cp -a ntfy_2.29.0_linux_armv7/ntfy /usr/bin/ntfy
sudo mkdir /etc/ntfy && sudo cp ntfy_2.29.0_linux_armv7/{client,server}/*.yml /etc/ntfy
wget https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_linux_armv7.tar.gz
tar zxvf ntfy_2.30.0_linux_armv7.tar.gz
sudo cp -a ntfy_2.30.0_linux_armv7/ntfy /usr/bin/ntfy
sudo mkdir /etc/ntfy && sudo cp ntfy_2.30.0_linux_armv7/{client,server}/*.yml /etc/ntfy
sudo ntfy serve
```
=== "arm64"
```bash
wget https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_linux_arm64.tar.gz
tar zxvf ntfy_2.29.0_linux_arm64.tar.gz
sudo cp -a ntfy_2.29.0_linux_arm64/ntfy /usr/bin/ntfy
sudo mkdir /etc/ntfy && sudo cp ntfy_2.29.0_linux_arm64/{client,server}/*.yml /etc/ntfy
wget https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_linux_arm64.tar.gz
tar zxvf ntfy_2.30.0_linux_arm64.tar.gz
sudo cp -a ntfy_2.30.0_linux_arm64/ntfy /usr/bin/ntfy
sudo mkdir /etc/ntfy && sudo cp ntfy_2.30.0_linux_arm64/{client,server}/*.yml /etc/ntfy
sudo ntfy serve
```
@@ -84,25 +84,25 @@ Install the ntfy server unit file (which contains parameters to start the servic
=== "x86_64/amd64"
```bash
sudo mv ntfy_2.29.0_linux_amd64/server/ntfy.service /etc/systemd/system/
sudo mv ntfy_2.30.0_linux_amd64/server/ntfy.service /etc/systemd/system/
sudo chmod 644 /etc/systemd/system/ntfy.service
```
=== "armv6"
```bash
sudo mv ntfy_2.29.0_linux_armv6/server/ntfy.service /etc/systemd/system/
sudo mv ntfy_2.30.0_linux_armv6/server/ntfy.service /etc/systemd/system/
sudo chmod 644 /etc/systemd/system/ntfy.service
```
=== "armv7/armhf"
```bash
sudo mv ntfy_2.29.0_linux_armv7/server/ntfy.service /etc/systemd/system/
sudo mv ntfy_2.30.0_linux_armv7/server/ntfy.service /etc/systemd/system/
sudo chmod 644 /etc/systemd/system/ntfy.service
```
=== "arm64"
```bash
sudo mv ntfy_2.29.0_linux_arm64/server/ntfy.service /etc/systemd/system/
sudo mv ntfy_2.30.0_linux_arm64/server/ntfy.service /etc/systemd/system/
sudo chmod 644 /etc/systemd/system/ntfy.service
```
@@ -118,25 +118,25 @@ Install the ntfy server service script:
=== "x86_64/amd64"
```bash
sudo mv ntfy_2.29.0_linux_amd64/server/ntfy.openrc /etc/init.d/ntfy
sudo mv ntfy_2.30.0_linux_amd64/server/ntfy.openrc /etc/init.d/ntfy
sudo chmod 755 /etc/init.d/ntfy
```
=== "armv6"
```bash
sudo mv ntfy_2.29.0_linux_armv6/server/ntfy.openrc /etc/init.d/ntfy
sudo mv ntfy_2.30.0_linux_armv6/server/ntfy.openrc /etc/init.d/ntfy
sudo chmod 755 /etc/init.d/ntfy
```
=== "armv7/armhf"
```bash
sudo mv ntfy_2.29.0_linux_armv7/server/ntfy.openrc /etc/init.d/ntfy
sudo mv ntfy_2.30.0_linux_armv7/server/ntfy.openrc /etc/init.d/ntfy
sudo chmod 755 /etc/init.d/ntfy
```
=== "arm64"
```bash
sudo mv ntfy_2.29.0_linux_arm64/server/ntfy.openrc /etc/init.d/ntfy
sudo mv ntfy_2.30.0_linux_arm64/server/ntfy.openrc /etc/init.d/ntfy
sudo chmod 755 /etc/init.d/ntfy
```
@@ -204,7 +204,7 @@ Manually installing the .deb file:
=== "x86_64/amd64"
```bash
wget https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_linux_amd64.deb
wget https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_linux_amd64.deb
sudo dpkg -i ntfy_*.deb
sudo systemctl enable ntfy
sudo systemctl start ntfy
@@ -212,7 +212,7 @@ Manually installing the .deb file:
=== "armv6"
```bash
wget https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_linux_armv6.deb
wget https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_linux_armv6.deb
sudo dpkg -i ntfy_*.deb
sudo systemctl enable ntfy
sudo systemctl start ntfy
@@ -220,7 +220,7 @@ Manually installing the .deb file:
=== "armv7/armhf"
```bash
wget https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_linux_armv7.deb
wget https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_linux_armv7.deb
sudo dpkg -i ntfy_*.deb
sudo systemctl enable ntfy
sudo systemctl start ntfy
@@ -228,7 +228,7 @@ Manually installing the .deb file:
=== "arm64"
```bash
wget https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_linux_arm64.deb
wget https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_linux_arm64.deb
sudo dpkg -i ntfy_*.deb
sudo systemctl enable ntfy
sudo systemctl start ntfy
@@ -238,28 +238,28 @@ Manually installing the .deb file:
=== "x86_64/amd64"
```bash
sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_linux_amd64.rpm
sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_linux_amd64.rpm
sudo systemctl enable ntfy
sudo systemctl start ntfy
```
=== "armv6"
```bash
sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_linux_armv6.rpm
sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_linux_armv6.rpm
sudo systemctl enable ntfy
sudo systemctl start ntfy
```
=== "armv7/armhf"
```bash
sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_linux_armv7.rpm
sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_linux_armv7.rpm
sudo systemctl enable ntfy
sudo systemctl start ntfy
```
=== "arm64"
```bash
sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_linux_arm64.rpm
sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_linux_arm64.rpm
sudo systemctl enable ntfy
sudo systemctl start ntfy
```
@@ -301,18 +301,18 @@ pkg install go-ntfy
## macOS
The [ntfy CLI](subscribe/cli.md) (`ntfy publish` and `ntfy subscribe` only) is supported on macOS as well.
To install, please [download the tarball](https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_darwin_all.tar.gz),
To install, please [download the tarball](https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_darwin_all.tar.gz),
extract it and place it somewhere in your `PATH` (e.g. `/usr/local/bin/ntfy`).
If run as `root`, ntfy will look for its config at `/etc/ntfy/client.yml`. For all other users, it'll look for it at
`~/Library/Application Support/ntfy/client.yml` (sample included in the tarball).
```bash
curl -L https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_darwin_all.tar.gz > ntfy_2.29.0_darwin_all.tar.gz
tar zxvf ntfy_2.29.0_darwin_all.tar.gz
sudo cp -a ntfy_2.29.0_darwin_all/ntfy /usr/local/bin/ntfy
curl -L https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_darwin_all.tar.gz > ntfy_2.30.0_darwin_all.tar.gz
tar zxvf ntfy_2.30.0_darwin_all.tar.gz
sudo cp -a ntfy_2.30.0_darwin_all/ntfy /usr/local/bin/ntfy
mkdir ~/Library/Application\ Support/ntfy
cp ntfy_2.29.0_darwin_all/client/client.yml ~/Library/Application\ Support/ntfy/client.yml
cp ntfy_2.30.0_darwin_all/client/client.yml ~/Library/Application\ Support/ntfy/client.yml
ntfy --help
```
@@ -333,7 +333,7 @@ brew install ntfy
The ntfy server and CLI are fully supported on Windows. You can run the ntfy server directly or as a Windows service.
To install, you can either
* [Download the latest ZIP](https://github.com/binwiederhier/ntfy/releases/download/v2.29.0/ntfy_2.29.0_windows_amd64.zip),
* [Download the latest ZIP](https://github.com/binwiederhier/ntfy/releases/download/v2.30.0/ntfy_2.30.0_windows_amd64.zip),
extract it and place the `ntfy.exe` binary somewhere in your `%Path%`.
* Or install ntfy from the [Scoop](https://scoop.sh) main repository via `scoop install ntfy`
docs/releases.md
+32 -22
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@@ -6,12 +6,43 @@ and the [ntfy Android app](https://github.com/binwiederhier/ntfy-android/release
| Component | Version | Release date |
|------------------|---------|---------------|
| ntfy server | v2.29.0 | Oct 7, 2026 |
| ntfy server | v2.30.0 | Oct 13, 2026 |
| ntfy Android app | v1.25.2 | July 23, 2026 |
| ntfy iOS app | v1.7.0 | May 30, 2026 |
Please check out the release notes for [upcoming releases](#not-released-yet) below.
### ntfy server v2.30.0
Released October 13, 2026
This release links attachments in email notifications, adds SMTP LOGIN auth (e.g. for OVH and Outlook), and fixes the
PostgreSQL memory growth that came with v2.29.0. It also ships the first experimental version of clustering: several
ntfy servers sharing one PostgreSQL database. Clustering is not ready for production yet. The message database schema
changes in this release, so please read the upgrade notes before downgrading.
**Features:**
* Link attachments in email notifications, including the file name and when the link expires ([#672](https://github.com/binwiederhier/ntfy/issues/672), thanks to [@merspieler](https://github.com/merspieler) for suggesting)
* Support SMTP servers that only offer LOGIN auth (e.g. OVH, Outlook) for sending emails ([#930](https://github.com/binwiederhier/ntfy/issues/930)/[#1530](https://github.com/binwiederhier/ntfy/pull/1530), thanks to [@wunter8](https://github.com/wunter8) for reporting and [@santanoce](https://github.com/santanoce) for the initial implementation)
* Experimental: run several ntfy servers as one cluster that shares a PostgreSQL database, enabled with `experimental-cluster-listen`; this is not ready for production yet ([#2005](https://github.com/binwiederhier/ntfy/pull/2005), [#2008](https://github.com/binwiederhier/ntfy/pull/2008), [#2012](https://github.com/binwiederhier/ntfy/pull/2012), [#2013](https://github.com/binwiederhier/ntfy/pull/2013))
**Bug fixes + maintenance:**
* Fix `Dockerfile-build` failing to build: use Go 1.26 and add the `cluster` package ([#1962](https://github.com/binwiederhier/ntfy/issues/1962), thanks to [@ElectricTea](https://github.com/ElectricTea) for reporting)
* Set the `org.opencontainers.image.version` label on release Docker images ([#1921](https://github.com/binwiederhier/ntfy/issues/1921)/[#1936](https://github.com/binwiederhier/ntfy/pull/1936), thanks to [@Plazzmex](https://github.com/Plazzmex) for reporting and [@w1977-0](https://github.com/w1977-0) for the fix)
* Warn at startup if `attachment-expiry-duration` is longer than `cache-duration`, since attachments never outlive their message ([#1053](https://github.com/binwiederhier/ntfy/issues/1053), thanks to [@ctschach](https://github.com/ctschach) for reporting)
* Fix PostgreSQL memory growth after v2.29.0: write message batches with one fixed `INSERT` for any batch size ([#2011](https://github.com/binwiederhier/ntfy/pull/2011))
* CLI: fix `ntfy publish` failing with "invalid header field value" when sending a multi-line message or title along with a file ([#1808](https://github.com/binwiederhier/ntfy/issues/1808), thanks to [@quantenzitrone](https://github.com/quantenzitrone) for reporting)
* Web app: fix an updated message showing next to its old version when the update arrived via the background poll instead of live ([#2010](https://github.com/binwiederhier/ntfy/pull/2010))
**Upgrade notes:**
* This release changes the message database schema (version 15 to 16). Downgrading to v2.29.0 afterwards requires setting the version back by hand first: `UPDATE schema_version SET version = 15 WHERE store = 'message'` on PostgreSQL, or `UPDATE schemaVersion SET version = 15 WHERE id = 1` in the SQLite `cache-file`
**Documentation:**
* Document recommended PostgreSQL pool settings for busy servers ([#2011](https://github.com/binwiederhier/ntfy/pull/2011))
### ntfy server v2.29.0
Released October 7, 2026
@@ -2122,27 +2153,6 @@ and the [ntfy Android app](https://github.com/binwiederhier/ntfy-android/release
## Not released yet
### ntfy server v2.29.1 (UNRELEASED)
**Features:**
* Link attachments in email notifications, including the file name and when the link expires ([#672](https://github.com/binwiederhier/ntfy/issues/672), thanks to [@merspieler](https://github.com/merspieler) for suggesting)
* Support SMTP servers that only offer LOGIN auth (e.g. OVH, Outlook) for sending emails ([#930](https://github.com/binwiederhier/ntfy/issues/930)/[#1530](https://github.com/binwiederhier/ntfy/pull/1530), thanks to [@wunter8](https://github.com/wunter8) for reporting and [@santanoce](https://github.com/santanoce) for the initial implementation)
**Bug fixes + maintenance:**
* Fix `Dockerfile-build` failing to build: use Go 1.26 and add the `cluster` package ([#1962](https://github.com/binwiederhier/ntfy/issues/1962), thanks to [@ElectricTea](https://github.com/ElectricTea) for reporting)
* Set the `org.opencontainers.image.version` label on release Docker images ([#1921](https://github.com/binwiederhier/ntfy/issues/1921)/[#1936](https://github.com/binwiederhier/ntfy/pull/1936), thanks to [@Plazzmex](https://github.com/Plazzmex) for reporting and [@w1977-0](https://github.com/w1977-0) for the fix)
* Warn at startup if `attachment-expiry-duration` is longer than `cache-duration`, since attachments never outlive their message ([#1053](https://github.com/binwiederhier/ntfy/issues/1053), thanks to [@ctschach](https://github.com/ctschach) for reporting)
* Fix PostgreSQL memory growth after v2.29.0: write message batches with one fixed `INSERT` for any batch size ([#2011](https://github.com/binwiederhier/ntfy/pull/2011))
* CLI: fix `ntfy publish` failing with "invalid header field value" when sending a multi-line message or title along with a file ([#1808](https://github.com/binwiederhier/ntfy/issues/1808), thanks to [@quantenzitrone](https://github.com/quantenzitrone) for reporting)
* Web app: fix an updated message showing next to its old version when the update arrived via the background poll instead of live ([#2010](https://github.com/binwiederhier/ntfy/pull/2010))
**Documentation:**
* Document recommended PostgreSQL pool settings for busy servers ([#2011](https://github.com/binwiederhier/ntfy/pull/2011))
### ntfy iOS app v1.8.0 (UNRELEASED)
**Features:**
server/server.yml
+4 -4
View File
@@ -61,10 +61,10 @@
#
# database-url: <connection-string>
# EXPERIMENTAL: Clustering options. These names are reserved and validated, but no node-to-node
# implementation ships yet: a server started with "experimental-cluster-listen" set refuses to
# start, rather than running single-node and looking like a cluster. The "experimental-" prefix
# means these option names may still change.
# EXPERIMENTAL: Clustering options. Setting "experimental-cluster-listen" runs this server as one
# node of a cluster that shares a PostgreSQL database. This is not ready for production: dropped
# node-to-node batches are not recovered yet, and rate limits and quotas are enforced per node,
# not across the cluster. The "experimental-" prefix means these option names may still change.
#
# - experimental-cluster-listen is the ip:port of the dedicated fan-out listener that peer nodes
# talk to. Bind it to a private network interface (e.g. "10.0.0.5:2587"); the public listeners