In el6 with console=tty0 console=ttyS0,115200 in the kernel cmdline I would get sysvinit and kernel printk output in both the AWS system log and the instance screenshot.
Example showing both printk and sysvinit output:
NET: Registered protocol family 10
lo: Disabled Privacy Extensions
Bringing up loopback interface: [ OK ]
<..>
Starting sshd: [ OK ]
Starting ntpd: [ OK ]
Starting postfix: [ OK ]
Starting crond: [ OK ]
Starting atd: [ OK ]
Starting consul: [ OK ]
Starting oddjobd: [ OK ]
Starting certmonger: [ OK ]
CentOS release 6.10 (Final)
Kernel 2.6.32-754.35.1.el6.x86_64 on an x86_64
ip-1-2-3-4.ec2.internal login:
The output is all but identical in the instance screenshot.
In el7 and el8 (systemd) it seems whichever console= is last will get both kernel printk and systemd output. The other will just get the kernel printk. Is there a way to duplicate the behavior of el6? Neither the system log nor the screenshot will ever have stdin attached to them. I just need the same stdout/err if possible. I've been trying to see if DefaultStandardOutput and/or LogTarget (system.conf or user.conf) or maybe even ForwardToConsole (journald.conf) might be what I'm looking for, but the documentation on freedesktop.org is rather sparse for these options and I don't want to break the current journald logging.
