2020-03-31 12:06:19 -05:00
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#!/bin/bash
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# Wrapper to execute any command in a specific
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# network namespace.
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# Usage:
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# sonic-netns-exec <namespace name> <command to be executed>
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NS="$1"
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shift
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[sonic-netns-exec]: use "$@" to reflects all positional parameters as they were set initially (#4375)
sonic-netns-exec fails to execute below command in swss.sh:
sonic-netns-exec "$NET_NS" sonic-db-cli $1 EVAL "
local tables = {$2}
for i = 1, table.getn(tables) do
local matches = redis.call('KEYS', tables[i])
for j,name in ipairs(matches) do
redis.call('DEL', name)
end
end" 0
This command fails with error " redis.exceptions.ResponseError: value is not an integer or out of range" .
Root cause:
When sonic-netns-exec executes the above function, argument passed to sonic-db-cli is NOT executed as a single script.
The argument is passed as separate keywords to sonic-db-cli, as below:
['EVAL', 'local', 'tables', '=', "{'PORT_TABLE*'}", 'for', 'i', '=', '1,', 'table.getn(tables)', 'do', 'local', 'matches', '=', "redis.call('KEYS',", 'tables[i])', 'for', 'j,name', 'in', 'ipairs(matches)', 'do', "redis.call('DEL',", 'name)', 'end', 'end', '0']
- How I did it
To make sure that the parameters are passed as they were set initially, fix sonic-netns-exec to use double quoted "$@", where "$@" is "$1" "$2" "$3" ... "${N}"
After fix, the argument passed to sonic-db-cli is as below:
Argument passed to sonic-db-cli:
['EVAL', "\n local tables = {'PORT_TABLE*'}\n for i = 1, table.getn(tables) do\n local matches = redis.call('KEYS', tables[i])\n for j,name in ipairs(matches) do\n redis.call('DEL', name)\n end\n end", '0']
Signed-off-by: SuvarnaMeenakshi <sumeenak@microsoft.com>
2020-04-07 02:05:47 -05:00
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if [ ! -z "$NS" ]; then
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ip netns exec $NS "$@"
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2020-03-31 12:06:19 -05:00
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else
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[sonic-netns-exec]: use "$@" to reflects all positional parameters as they were set initially (#4375)
sonic-netns-exec fails to execute below command in swss.sh:
sonic-netns-exec "$NET_NS" sonic-db-cli $1 EVAL "
local tables = {$2}
for i = 1, table.getn(tables) do
local matches = redis.call('KEYS', tables[i])
for j,name in ipairs(matches) do
redis.call('DEL', name)
end
end" 0
This command fails with error " redis.exceptions.ResponseError: value is not an integer or out of range" .
Root cause:
When sonic-netns-exec executes the above function, argument passed to sonic-db-cli is NOT executed as a single script.
The argument is passed as separate keywords to sonic-db-cli, as below:
['EVAL', 'local', 'tables', '=', "{'PORT_TABLE*'}", 'for', 'i', '=', '1,', 'table.getn(tables)', 'do', 'local', 'matches', '=', "redis.call('KEYS',", 'tables[i])', 'for', 'j,name', 'in', 'ipairs(matches)', 'do', "redis.call('DEL',", 'name)', 'end', 'end', '0']
- How I did it
To make sure that the parameters are passed as they were set initially, fix sonic-netns-exec to use double quoted "$@", where "$@" is "$1" "$2" "$3" ... "${N}"
After fix, the argument passed to sonic-db-cli is as below:
Argument passed to sonic-db-cli:
['EVAL', "\n local tables = {'PORT_TABLE*'}\n for i = 1, table.getn(tables) do\n local matches = redis.call('KEYS', tables[i])\n for j,name in ipairs(matches) do\n redis.call('DEL', name)\n end\n end", '0']
Signed-off-by: SuvarnaMeenakshi <sumeenak@microsoft.com>
2020-04-07 02:05:47 -05:00
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"$@"
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2020-03-31 12:06:19 -05:00
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fi
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