Chain node & java commands in Docker CMD
I am trying to execute the following in my container:
CMD ["java", "-version", "&&", "node", "index.js"]
The first command runs, but the node command does not. Is the proper syntax for chaining these commands?
java node.js docker cmd
asked Nov 25 '18 at 18:07
MadCatm2MadCatm2
244418
add a comment |
I am trying to execute the following in my container:
CMD ["java", "-version", "&&", "node", "index.js"]
The first command runs, but the node command does not. Is the proper syntax for chaining these commands?
java node.js docker cmd
asked Nov 25 '18 at 18:07
MadCatm2MadCatm2
244418
add a comment |
I am trying to execute the following in my container:
CMD ["java", "-version", "&&", "node", "index.js"]
The first command runs, but the node command does not. Is the proper syntax for chaining these commands?
java node.js docker cmd
asked Nov 25 '18 at 18:07
MadCatm2MadCatm2
244418
I am trying to execute the following in my container:
CMD ["java", "-version", "&&", "node", "index.js"]
The first command runs, but the node command does not. Is the proper syntax for chaining these commands?
java node.js docker cmd
java node.js docker cmd
asked Nov 25 '18 at 18:07
MadCatm2MadCatm2
244418
asked Nov 25 '18 at 18:07
MadCatm2MadCatm2
244418
asked Nov 25 '18 at 18:07
MadCatm2MadCatm2
244418
asked Nov 25 '18 at 18:07
MadCatm2MadCatm2
244418
asked Nov 25 '18 at 18:07
MadCatm2MadCatm2
244418
244418
add a comment |
add a comment |
1 Answer
1
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You are using the exec form, this means that no shell (sh,bash etc.) is invoked, so what is essentially happening is that java gets "&&", "node" and "index.js" as extra arguments which it will likely ignore.
You can use the shell format to get the logic you want:
CMD java -version && node index.js
answered Nov 25 '18 at 18:24
Uku LoskitUku Loskit
30.7k86980
Do you mind explaining why I am using exec mode in this case? Is this because I placed my commands in? If I were to simply runCMD java...withoutthat would mean I am in shell form, correct?
– MadCatm2
Nov 25 '18 at 18:27
yes, that is the case. More info here: docs.docker.com/engine/reference/builder/#cmd
– Uku Loskit
Nov 25 '18 at 18:28
Aha, so in exec mode it becomes JSON. Very interesting. Thank you.
– MadCatm2
Nov 25 '18 at 18:47
add a comment |
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1 Answer
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1 Answer
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active
oldest
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oldest
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You are using the exec form, this means that no shell (sh,bash etc.) is invoked, so what is essentially happening is that java gets "&&", "node" and "index.js" as extra arguments which it will likely ignore.
You can use the shell format to get the logic you want:
CMD java -version && node index.js
answered Nov 25 '18 at 18:24
Uku LoskitUku Loskit
30.7k86980
Do you mind explaining why I am using exec mode in this case? Is this because I placed my commands in? If I were to simply runCMD java...withoutthat would mean I am in shell form, correct?
– MadCatm2
Nov 25 '18 at 18:27
yes, that is the case. More info here: docs.docker.com/engine/reference/builder/#cmd
– Uku Loskit
Nov 25 '18 at 18:28
Aha, so in exec mode it becomes JSON. Very interesting. Thank you.
– MadCatm2
Nov 25 '18 at 18:47
add a comment |
You are using the exec form, this means that no shell (sh,bash etc.) is invoked, so what is essentially happening is that java gets "&&", "node" and "index.js" as extra arguments which it will likely ignore.
You can use the shell format to get the logic you want:
CMD java -version && node index.js
answered Nov 25 '18 at 18:24
Uku LoskitUku Loskit
30.7k86980
Do you mind explaining why I am using exec mode in this case? Is this because I placed my commands in? If I were to simply runCMD java...withoutthat would mean I am in shell form, correct?
– MadCatm2
Nov 25 '18 at 18:27
yes, that is the case. More info here: docs.docker.com/engine/reference/builder/#cmd
– Uku Loskit
Nov 25 '18 at 18:28
Aha, so in exec mode it becomes JSON. Very interesting. Thank you.
– MadCatm2
Nov 25 '18 at 18:47
add a comment |
You are using the exec form, this means that no shell (sh,bash etc.) is invoked, so what is essentially happening is that java gets "&&", "node" and "index.js" as extra arguments which it will likely ignore.
You can use the shell format to get the logic you want:
CMD java -version && node index.js
answered Nov 25 '18 at 18:24
Uku LoskitUku Loskit
30.7k86980
You are using the exec form, this means that no shell (sh,bash etc.) is invoked, so what is essentially happening is that java gets "&&", "node" and "index.js" as extra arguments which it will likely ignore.
You can use the shell format to get the logic you want:
CMD java -version && node index.js
answered Nov 25 '18 at 18:24
Uku LoskitUku Loskit
30.7k86980
edited Nov 25 '18 at 18:27
answered Nov 25 '18 at 18:24
Uku LoskitUku Loskit
30.7k86980
answered Nov 25 '18 at 18:24
Uku LoskitUku Loskit
30.7k86980
answered Nov 25 '18 at 18:24
Uku LoskitUku Loskit
30.7k86980
30.7k86980
Do you mind explaining why I am using exec mode in this case? Is this because I placed my commands in? If I were to simply runCMD java...withoutthat would mean I am in shell form, correct?
– MadCatm2
Nov 25 '18 at 18:27
yes, that is the case. More info here: docs.docker.com/engine/reference/builder/#cmd
– Uku Loskit
Nov 25 '18 at 18:28
Aha, so in exec mode it becomes JSON. Very interesting. Thank you.
– MadCatm2
Nov 25 '18 at 18:47
add a comment |
Do you mind explaining why I am using exec mode in this case? Is this because I placed my commands in? If I were to simply runCMD java...withoutthat would mean I am in shell form, correct?
– MadCatm2
Nov 25 '18 at 18:27
yes, that is the case. More info here: docs.docker.com/engine/reference/builder/#cmd
– Uku Loskit
Nov 25 '18 at 18:28
Aha, so in exec mode it becomes JSON. Very interesting. Thank you.
– MadCatm2
Nov 25 '18 at 18:47
Do you mind explaining why I am using exec mode in this case? Is this because I placed my commands in
CMD java... without – MadCatm2
Nov 25 '18 at 18:27
Do you mind explaining why I am using exec mode in this case? Is this because I placed my commands in
CMD java... without – MadCatm2
Nov 25 '18 at 18:27
yes, that is the case. More info here: docs.docker.com/engine/reference/builder/#cmd
– Uku Loskit
Nov 25 '18 at 18:28
yes, that is the case. More info here: docs.docker.com/engine/reference/builder/#cmd
– Uku Loskit
Nov 25 '18 at 18:28
Aha, so in exec mode it becomes JSON. Very interesting. Thank you.
– MadCatm2
Nov 25 '18 at 18:47
Aha, so in exec mode it becomes JSON. Very interesting. Thank you.
– MadCatm2
Nov 25 '18 at 18:47
add a comment |
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