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Kind Attachment Name Size Version Date Modified Author Change note
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 controller.png 428.8 kB 1 07-Apr-2024 01:39 Ben Spink
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 controller_setup.png 38.1 kB 1 07-Apr-2024 01:31 Ben Spink
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 dc1_only.png 34.5 kB 1 07-Apr-2024 01:27 Ben Spink
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 dc1_unless.png 34.6 kB 1 07-Apr-2024 01:27 Ben Spink
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 job.XML 38.1 kB 1 08-Apr-2024 11:11 Ben Spink

This page (revision-7) was last changed on 08-Apr-2024 11:12 by Ben Spink

This page was created on 07-Apr-2024 01:21 by Ben Spink

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At line 5 added 4 lines
All four servers are using replication and cross pointing at each other.\\
Each pair of Main servers in each DC has ServerBeat configured using the "JOB" VIP (or a real VIP) so that only one Main server in each DC is actually running jobs.\\
\\
!!Expectations:
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[attachments|dc1_only.png][attachments|dc1_unless.png]\\
[attachments|dc1_only.png] [attachments|dc1_unless.png]\\
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The "controller" job on these variables utilizes the hostname of the current machine to determine if its running in a dc1 or dc2 environment. This is critical that the hostname has some marker you can use to distinguish which DC you are running in. The very first part of the job simply looks at the current hostname to decide which one we are in and sets a variable for future decisions. This controller job runs frequently, so you should turn off saving state between steps and saving state at the end. Maybe keep them enabled which configuring, but then turn those off to not have a lot of job pollution.\\
The "controller" job on these variables utilizes the hostname of the current machine to determine if its running in a dc1 or dc2 environment. This is "row 1" area of the job. This is critical that the hostname has some marker you can use to distinguish which DC you are running in. The very first part of the job simply looks at the current hostname to decide which one we are in and sets a variable for future decisions. This controller job runs frequently, so you should turn off saving state between steps and saving state at the end. Maybe keep them enabled which configuring, but then turn those off to not have a lot of job pollution.\\
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OK, finally...now into the job logic. The logic is "simple" and yet complex at the same time. Please try to follow along.\\
OK, finally...now into the job logic. The logic is "simple" and yet complex at the same time. Please follow along.\\
''(Row 2 area)''\\
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2.) If we are not in DC1, then we need to check if DC1 is online or not...is a server in DC1 responding?\\
2.) If we are not in DC1, then we need to check if DC1 is online or not...is a server in DC1 responding? We do this by checking the list of reporting hostnames in the variable: server_active_replicated_hostnames\\
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(Now we repeat for the opposite scenario of DC2.)\\
\\
Now we repeat for the opposite scenario of DC2.\\
''(Row 3 area)''\\
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2.) If we are not in DC2, then we need to check if DC2 is online or not...is a server in DC2 responding?\\
2.) If we are not in DC2, then we need to check if DC2 is online or not...is a server in DC2 responding? We do this by checking the list of reporting hostnames in the variable: server_active_replicated_hostnames\\
Version Date Modified Size Author Changes ... Change note
7 08-Apr-2024 11:12 3.322 kB Ben Spink to previous
6 08-Apr-2024 11:12 3.322 kB Ben Spink to previous | to last
5 07-Apr-2024 01:45 3.26 kB Ben Spink to previous | to last
4 07-Apr-2024 01:39 2.709 kB Ben Spink to previous | to last
3 07-Apr-2024 01:31 1.566 kB Ben Spink to previous | to last
2 07-Apr-2024 01:27 0.915 kB Ben Spink to previous | to last
1 07-Apr-2024 01:21 0.621 kB Ben Spink to last
« This page (revision-7) was last changed on 08-Apr-2024 11:12 by Ben Spink
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