CLOUD-464: Updates for Reconciliation

[mronstro]

No description provided.

[mronstro]

The following changes have been made:

1. The pidfile names are now named after the binary name, thus
   ndb_mgmd.pid, ndbmtd.pid and mysqld.pid. To achieve this the
   ndb_mgmd and ndbmtd uses a new parameter --service-name
   that is set to the binary name. This makes it possible to have multiple
   ndbmtd services on the same machine with different service names.
   The change to the systemd script is that a new parameter SERVICE_ARG
   is added (environment variable). The ndb-agent uses this environment
   variable to set the service name. Older implementations simply doesn't
   set the service name and gets the old behaviour.

For MySQL Server we change the my-ndb.cnf file to use a mysqld.pid
as the pidfile name, a new parameter is added for this. Also new parameters
are added for pidfile name of ndbmtd and ndb_mgmd.

[mronstro]

2. The ServerPort have changed from 10000 to 11860 which is the standard port number to use for this.
3. The download tarball have added glibcVersion and cpu_platform to accomodate the change to glibcVersion
   2.28 and the addition of arm64_v8 to the CPU platforms.

[mronstro]

4. The systemd scripts also now accepts INITIAL_START environment variable to ensure that the restart is an
   initial restart and not a normal restart. The old NDBD_INITIAL_START is still accepted as well and they will
   cause the same behaviour.

[smkniazi]

version change should wait for RONDB-519, which updates rondb from the entire platform

[mronstro]

ok

[kouzant]

You can combine this in the same if condition and avoid duplicating code ;)

[kouzant]

Also, I think the only place where we use NDBD_INITIAL_RESTART is ec2-init and ndb-agent so I think shortly after everything is merged we can continue with only one variable

[mronstro]

ok, made an attempt, but a bit uncertain about the exact syntax to use

[kouzant]

You can remove this line entirely ;)

[kouzant]

The correct syntax is either [[ "${NDBD_INITIAL_RESTART}" = "true" || -n "${INITIAL_START}" ]] note the double square brackets or [ "${NDBD_INITIAL_RESTART}" = "true" ] || [ -n "${INITIAL_START}" ]

[olapiv]

The ndb-agent expects the following files to exist under /srv/hops/mysql-cluster/ndb/scripts/:

mgmd_env_variables

MGM_CONN_STRING=
NDB_MGMD_NODE_ID=

INITIAL_START=
SERVICE_NAME=

mysqld_env_variables

MGM_CONN_STRING=

ndbd_env_variables

MGM_CONN_STRING=
NDB_NDBD_NODE_ID=

INITIAL_START=
SERVICE_NAME=

[olapiv]

The reason for the service name is to avoid having to sed pid files everywhere. It makes the ndb-agent difficult to reliably test locally since we use supervisord instead of systemd. supervisord runs processes in foreground, so there's no .pid file.