Ensure port availability
Make sure required ports are available.
Before installing Redis Enterprise Software, make sure all required ports are available.
If ports that Redis assigns to the database are being used by the operating system or other processes, the installation fails.
Follow the relevant sections to configure required ports.
For recommended and optional port configuration, see Network port configurations.
Update sysctl.conf
to avoid port collisions
To avoid port collision, update /etc/sysctl.conf
to include:
net.ipv4.ip_local_port_range = 30000 65535
Ubuntu conflicts with port 53
If port 53 is in use, the installation fails. This can occur in
default installations of Ubuntu 18.04 and 20.04 in which systemd-resolved
(DNS server) is running.
To prevent this issue, change the system configuration to make this port available before installation.
-
Edit
/etc/systemd/resolved.conf
:sudo vi /etc/systemd/resolved.conf
-
Add
DNSStubListener=no
as the last line in the file and save the file. -
Rename the current
/etc/resolv.conf
file:sudo mv /etc/resolv.conf /etc/resolv.conf.orig
-
Create a symbolic link for
/etc/resolv.conf
:sudo ln -s /run/systemd/resolve/resolv.conf /etc/resolv.conf
Note:You might encounter a temporary name resolution error (sudo: unable to resolve host {hostname}: Temporary failure in name resolution
), which should be fixed when you restartsystemd-resolved
in the next step. -
Restart the DNS service:
sudo service systemd-resolved restart