install APEX 5.1 in 12.2

1. Notice that APEX is not installed by default since 12.2

fond of installing 5.1 to 12.2

follow the standard step of installation guide , or 
my favorite article 

key things different with installation in 11g is , I need to set container to pluggable database pdb1.

No errors with all steps, however when I launch http://localhost:8080/apex/apex_admin , it prompts for XDB username and password.

Reviewed a few times on previous steps, finally I notice the  account_status of anonymous is EXPIRED, although I issued unlocked command.

while inside the pdb, I attempted to changes its password in order to make it non-expired. 

SYS> alter USER ANONYMOUS identified by oracle123 ;
alter USER ANONYMOUS identified by oracle123
*
ERROR at line 1:
ORA-65066: The specified changes must apply to all containers

as such, I quit back to contained database , and re-issue the command successfully .


SYS> conn / as sysdba
Connected.
SYS> alter USER ANONYMOUS  account unlock;
SYS>  select username, account_status from dba_users where username like 'ANONY%';

USERNAME
--------------------------------------------------------------------------------
ACCOUNT_STATUS
--------------------------------
ANONYMOUS
EXPIRED

SYS> alter USER ANONYMOUS identified by oracle123 ;
SYS>  select username, account_status from dba_users where username like 'ANONY%';

USERNAME
--------------------------------------------------------------------------------
ACCOUNT_STATUS
--------------------------------

ANONYMOUS
OPEN



SYS> alter session set container=pdb1;
SYS>  select username, account_status from dba_users where username like 'ANONY%';

USERNAME
--------------------------------------------------------------------------------
ACCOUNT_STATUS
--------------------------------
ANONYMOUS


SYS> conn / as sysdba
Connected.
SYS> alter USER ANONYMOUS  account unlock;
SYS>  select username, account_status from dba_users where username like 'ANONY%';

USERNAME
--------------------------------------------------------------------------------
ACCOUNT_STATUS
--------------------------------
ANONYMOUS
EXPIRED

SYS> alter USER ANONYMOUS identified by oracle123 ;
SYS>  select username, account_status from dba_users where username like 'ANONY%';

USERNAME
--------------------------------------------------------------------------------
ACCOUNT_STATUS
--------------------------------

ANONYMOUS
OPEN




SYS> alter session set container=pdb1;
SYS>  select username, account_status from dba_users where username like 'ANONY%';

USERNAME
--------------------------------------------------------------------------------
ACCOUNT_STATUS
--------------------------------
ANONYMOUS
OPEN


finally, I changed DEFAULT profile at both container and PDB level, to make password no expired.
SYS> alter profile DEFAULT limit PASSWORD_LIFE_TIME unlimited;


Once ANONYMOUS account is unlocked, I am able to logon APEX smoothly!