Ansible : how to run multiple steps shell command with special chars - ansible

Question

Under my Playbook , i want to run a shell command which is the following :
for STACK in stackone stacktwo;do docker stack ps --format "table {{.ID}}\t{{.Name}}\t{{.CurrentState}}\t{{.Error}}\t{{.Node}}" $STACK | (read -r; printf "%s\n" "$REPLY"; sort -k 2|grep srcd |grep -v Shutdown ); done;
As you can see my shell command is quite complex , so when i am running it like this , it fails throwing always syntax errors
- name : Check running services
shell: for STACK in stackone srcd-pilote;do docker stack ps --format "table {{.ID}}\t{{.Name}}\t{{.CurrentState}}\t{{.Error}}\t{{.Node}}" $STACK | (read -r; printf "%s\n" "$REPLY"; sort -k 2|grep srcd |grep -v Shutdown ); done;
register: result
I see there is many characters which need to be passed as strings such as {{.Name}} and |grep ...
So i ve tried this :
- name : Check running services
shell: "for STACK in srcd-current stacktwo;do docker stack ps --format 'table {{'"{{.ID}}"'}}\t{{'"{{.Name}}"'}}\t{{'"{{.CurrentState}}"'}}\t{{'"{{.Error}}"'}}\t{{'"{{.Node}}"'}}' $STACK | (read -r; printf '%s\n' '$REPLY'; sort -k 2'"{{|}}"'grep srcd '"{{|}}"'grep -v Shutdown ); done; "
register: result
But it stills failing .
Suggesstions ??

Answer 1

I had to use a shell for loop in one of my ansible tasks. I use a Literal Block Scalar '|' to do so. Try something like this:
- name : Check running services
shell: |
for STACK in stackone srcd-pilote;do
docker stack ps --format "table {{ '{{' }}.ID{{ '}}' }}\t{{ '{{' }}.Name{{ '}}' }}\t{{ '{{' }}.CurrentState{{ '}}' }}\t{{ '{{' }}.Error{{ '}}' }}\t{{ '{{' }}.Node{{ '}}' }}" $STACK | (read -r; printf "%s\n" "$REPLY"; sort -k 2|grep srcd |grep -v Shutdown );
done;
More doc on the scalar can be found on the Ansible doc about YAML syntax.
You should also escape the {{ and }} from the jinja2, by using {{ '{{' }} and {{ '}}' }}.
Note 1: Here is a nice sed command to do so:
s/{{\([^}]*\)}}/{{ '{{' }}\1{{ '}}' }}/g
Note 2:
You should review the command to split it in several lines to improve the readability (with \ at the end of line or using the > scalar).
Ansible-Lint rules recommend line shorter than 160 characters (rule E204).